10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2016, or

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number: 1-3754

ALLY FINANCIAL INC.

(Exact name of registrant as specified in its charter)

Delaware	38-0572512
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

Ally Detroit Center

500 Woodward Ave.

Floor 10, Detroit, Michigan

48226

(Address of principal executive offices)

(Zip Code)

(866) 710-4623

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes þ                    No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for a shorter period that the registrant was required to submit and post such files).

Yes þ                    No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer þ	Accelerated filer o	Non-accelerated filer o	Smaller reporting company o
	(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes ¨                    No þ

At October 31, 2016, the number of shares outstanding of the Registrant’s common stock was 471,597,537 shares.

INDEX

Ally Financial Inc. Ÿ Form 10-Q

		Page
Part I — Financial Information
Item 1.	Financial Statements	3
	Condensed Consolidated Statement of Comprehensive Income (unaudited) for the Three and Nine Months Ended September 30, 2016 and 2015	3
	Condensed Consolidated Balance Sheet (unaudited) at September 30, 2016 and December 31, 2015	5
	Condensed Consolidated Statement of Changes in Equity (unaudited) for the Three and Nine Months Ended September 30, 2016 and 2015	7
	Condensed Consolidated Statement of Cash Flows (unaudited) for the Nine Months Ended September 30, 2016 and 2015	8
	Notes to Condensed Consolidated Financial Statements (unaudited)	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	64
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	108
Item 4.	Controls and Procedures	109
Part II — Other Information		110
Item 1.	Legal Proceedings	110
Item 1A.	Risk Factors	110
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	110
Item 3.	Defaults Upon Senior Securities	110
Item 4.	Mine Safety Disclosures	110
Item 5.	Other Information	110
Item 6.	Exhibits	110
Signatures		111
Index of Exhibits		112

Table of Contents PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

Condensed Consolidated Statement of Comprehensive Income (unaudited)

Ally Financial Inc. • Form 10-Q

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	1,307		$	1,166		$	3,807		$	3,358
Interest on loans held-for-sale	—			2			—			40
Interest and dividends on investment securities	101			102			302			283
Interest on cash and cash equivalents	3			2			10			6
Operating leases	649			830			2,119			2,586
Total financing revenue and other interest income	2,060			2,102			6,238			6,273
Interest expense
Interest on deposits	212			181			608			530
Interest on short-term borrowings	14			13			39			36
Interest on long-term debt	430			410			1,308			1,258
Total interest expense	656			604			1,955			1,824
Depreciation expense on operating lease assets	408			528			1,352			1,713
Net financing revenue	996			970			2,931			2,736
Other revenue
Insurance premiums and service revenue earned	238			236			704			706
(Loss) gain on mortgage and automotive loans, net	—			(2		)	4			45
Loss on extinguishment of debt	—			—			(4		)	(354		)
Other gain on investments, net	52			6			145			106
Other income, net of losses	98			92			289			283
Total other revenue	388			332			1,138			786
Total net revenue	1,384			1,302			4,069			3,522
Provision for loan losses	258			211			650			467
Noninterest expense
Compensation and benefits expense	248			235			742			726
Insurance losses and loss adjustment expenses	69			61			287			239
Other operating expenses	418			378			1,189			1,128
Total noninterest expense	735			674			2,218			2,093
Income from continuing operations before income tax expense	391			417			1,201			962
Income tax expense from continuing operations	130			144			336			341
Net income from continuing operations	261			273			865			621
(Loss) income from discontinued operations, net of tax	(52		)	(5		)	(46		)	405
Net income	209			268			819			1,026
Other comprehensive (loss) income, net of tax	(4		)	61			262			(56		)
Comprehensive income	$	205		$	329		$	1,081		$	970

Statement continues on the next page.

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

3

Condensed Consolidated Statement of Comprehensive Income (unaudited)

Ally Financial Inc. • Form 10-Q

	Three months ended September 30,						Nine months ended September 30,
(in dollars) (a)	2016			2015			2016			2015
Basic earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.73		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.48		$	1.63		$	(0.68	)
Diluted earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.72		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.47		$	1.63		$	(0.68	)
Cash dividends per common share	$	0.08		$	—		$	0.08		$	—

(a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

Refer to Note 18 for additional earnings per share information, including the impact of preferred stock dividends recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock for the three months and nine months endedSeptember 30, 2015. The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

4

Condensed Consolidated Balance Sheet (unaudited)

Ally Financial Inc. • Form 10-Q

($ in millions, except share data)	September 30, 2016			December 31, 2015
Assets
Cash and cash equivalents
Noninterest-bearing	$	1,779		$	2,148
Interest-bearing	2,510			4,232
Total cash and cash equivalents	4,289			6,380
Available-for-sale securities (refer to Note 6 for discussion of investment securities pledged as collateral)	17,701			17,157
Held-to-maturity securities	649			—
Loans held-for-sale, net	56			105
Finance receivables and loans, net
Finance receivables and loans, net of unearned income	114,959			111,600
Allowance for loan losses	(1,134		)	(1,054		)
Total finance receivables and loans, net	113,825			110,546
Investment in operating leases, net	12,689			16,271
Premiums receivable and other insurance assets	1,881			1,801
Other assets	6,307			6,321
Total assets	$	157,397		$	158,581
Liabilities
Deposit liabilities
Noninterest-bearing	$	101		$	89
Interest-bearing	75,643			66,389
Total deposit liabilities	75,744			66,478
Short-term borrowings	6,434			8,101
Long-term debt	56,836			66,234
Interest payable	462			350
Unearned insurance premiums and service revenue	2,493			2,434
Accrued expenses and other liabilities	1,798			1,545
Total liabilities	143,767			145,142
Contingencies (refer to Note 26)
Equity
Common stock and paid-in capital ($0.01 par value, shares authorized 1,100,000,000; issued 485,431,852 and 482,790,696; and outstanding 475,469,882 and 481,980,111)	21,149			21,100
Preferred stock	—			696
Accumulated deficit	(7,361		)	(8,110		)
Accumulated other comprehensive income (loss)	31			(231		)
Treasury stock, at cost (9,961,970 and 810,585 shares)	(189		)	(16		)
Total equity	13,630			13,439
Total liabilities and equity	$	157,397		$	158,581

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

5

Condensed Consolidated Balance Sheet (unaudited)

Ally Financial Inc. • Form 10-Q

The assets of consolidated variable interest entities, presented based upon the legal transfer of the underlying assets in order to reflect legal ownership, that can be used only to settle obligations of the consolidated variable interest entities and the liabilities of these entities for which creditors (or beneficial interest holders) do not have recourse to our general credit were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Assets
Finance receivables and loans, net
Finance receivables and loans, net of unearned income	$	26,009		$	27,929
Allowance for loan losses	(193		)	(196		)
Total finance receivables and loans, net	25,816			27,733
Investment in operating leases, net	2,337			4,791
Other assets	1,189			1,624
Total assets	$	29,342		$	34,148
Liabilities
Long-term debt	$	15,985		$	20,267
Accrued expenses and other liabilities	14			22
Total liabilities	$	15,999		$	20,289

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

6

Condensed Consolidated Statement of Changes in Equity (unaudited)

Ally Financial Inc. • Form 10-Q

($ in millions)	Common stock and paid-in capital		Preferred stock			Accumulated deficit				Accumulated other comprehensive (loss) income			Treasury stock			Total equity
Balance at January 1, 2015	$	21,038	$	1,255		$	(6,828	)		$	(66	)	$	—		$	15,399
Net income						1,026										1,026
Preferred stock dividends						(1,356		)	(a)							(1,356		)
Series A preferred stock repurchase			(325		)											(325		)
Series G preferred stock redemption			(117		)											(117		)
Share-based compensation	44															44
Other comprehensive loss										(56		)				(56		)
Share repurchases related to employee stock-based compensation awards													(16		)	(16		)
Balance at September 30, 2015	$	21,082	$	813		$	(7,158	)		$	(122	)	$	(16	)	$	14,599
Balance at January 1, 2016	$	21,100	$	696		$	(8,110	)		$	(231	)	$	(16	)	$	13,439
Net income						819										819
Preferred stock dividends						(30		)								(30		)
Series A preferred stock redemption			(696		)											(696		)
Share-based compensation	49															49
Other comprehensive income										262						262
Common stock repurchases (b)													(173		)	(173		)
Common stock dividend						(40		)								(40		)
Balance at September 30, 2016	$	21,149	$	—		$	(7,361	)		$	31		$	(189	)	$	13,630

(a) Preferred stock dividends include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized.

(b) Includes shares repurchased related to employee stock-based compensation awards.

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

7

Condensed Consolidated Statement of Cash Flows (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, ($ in millions)	2016			2015
Operating activities
Net income	$	819		$	1,026
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization	1,807			2,130
Provision for loan losses	650			467
Gain on mortgage and automotive loans, net	(4		)	(45		)
Other gain on investments, net	(145		)	(106		)
Loss on extinguishment of debt	4			354
Originations and purchases of loans held-for-sale	(141		)	(1,594		)
Proceeds from sales and repayments of loans originated as held-for-sale	184			1,580
Gain on sale of subsidiaries, net	—			(452		)
Net change in
Deferred income taxes	322			406
Interest payable	112			(40		)
Other assets	16			528
Other liabilities	(65		)	(212		)
Other, net	30			(72		)
Net cash provided by operating activities	3,589			3,970
Investing activities
Purchases of available-for-sale securities	(11,027		)	(10,011		)
Proceeds from sales of available-for-sale securities	8,546			4,408
Proceeds from maturities and repayment of available-for-sale securities	2,411			3,141
Purchases of held-to-maturity securities	(650		)	—
Net increase in finance receivables and loans	(8,308		)	(9,175		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	4,221			2,665
Purchases of operating lease assets	(2,360		)	(3,423		)
Disposals of operating lease assets	4,631			3,855
Acquisitions, net of cash acquired	(309		)	—
Proceeds from sale of business unit, net (a)	—			1,049
Net change in restricted cash	622			489
Net change in nonmarketable equity investments	(401		)	(42		)
Other, net	(157		)	25
Net cash used in investing activities	(2,781		)	(7,019		)

Statement continues on the next page.

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

8

Condensed Consolidated Statement of Cash Flows (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, ($ in millions)	2016			2015
Financing activities
Net change in short-term borrowings	(1,673		)	(1,692		)
Net increase in deposits	9,240			5,797
Proceeds from issuance of long-term debt	11,229			23,866
Repayments of long-term debt	(20,758		)	(23,454		)
Repurchase and redemption of preferred stock	(696		)	(442		)
Repurchase of common stock	(173		)	(16		)
Dividends paid	(70		)	(1,356		)
Net cash (used in) provided by financing activities	(2,901		)	2,703
Effect of exchange-rate changes on cash and cash equivalents	2			(3		)
Net decrease in cash and cash equivalents	(2,091		)	(349		)
Cash and cash equivalents at beginning of year	6,380			5,576
Cash and cash equivalents at September 30,	$	4,289		$	5,227
Supplemental disclosures
Cash paid for
Interest	$	1,860		$	1,825
Income taxes	16			95
Noncash items
Finance receivables and loans transferred to loans held-for-sale	4,231			777
Other disclosures
Proceeds from sales and repayments of mortgage loans held-for-investment originally designated as held-for-sale	28			61

(a) Cash flows of discontinued operations are reflected within operating, investing, and financing activities in the Condensed Consolidated Statement of Cash Flows.

The Notes to the Condensed Consolidated Financial Statements (unaudited) are an integral part of these statements.

9

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

1.    Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies

Ally Financial Inc. (referred to herein as Ally, Parent, we, our, or us) is a leading digital financial services company offering financial products for consumers, businesses, automotive dealers and corporate clients. Founded in 1919, we have over 95 years of experience providing a broad array of financial products and services. We operate as a financial holding company (FHC) and a bank holding company (BHC). Our banking subsidiary, Ally Bank, is an award-winning online bank, and an indirect, wholly-owned subsidiary of Ally Financial Inc. with a distinct brand and relentless focus on customers, offering a variety of deposit and other banking products.

Our accounting and reporting policies conform to accounting principles generally accepted in the United States of America (GAAP). Additionally, where applicable, the policies conform to the accounting and reporting guidelines prescribed by bank regulatory authorities. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and that affect income and expenses during the reporting period and related disclosures. In developing the estimates and assumptions, management uses all available evidence; however, actual results could differ because of uncertainties associated with estimating the amounts, timing, and likelihood of possible outcomes.

The Condensed Consolidated Financial Statements at September 30, 2016, and for the three months and nine months endedSeptember 30, 2016, and 2015, are unaudited but reflect all adjustments that are, in management’s opinion, necessary for the fair presentation of the results for the interim periods presented. All such adjustments are of a normal recurring nature, except for within the Condensed Consolidated Statement of Cash Flows and related disclosures in Note 25 to the Condensed Consolidated Financial Statements, where an immaterial amount related to the repurchase of common stock for the period ended September 30, 2015, was reclassified from operating activities to financing activities to appropriately present the prior period amounts.

These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements (and the related Notes) included in our Annual Report on Form 10-K for the year ended December 31, 2015, as filed on February 24, 2016, with the U.S. Securities and Exchange Commission (SEC), as amended by the Current Report on Form 8-K filed with the SEC on May 5, 2016 (referred to herein as the Annual Consolidated Financial Statements).

Change in Reportable Segments

As a result of a change in how management views and operates our business, during the first quarter of 2016, we made changes in the composition of our operating segments. Financial information related to our Corporate Finance business is presented as a separate reportable segment. Previously, all such activity was included in Corporate and Other. Additionally, only the activity of our ongoing bulk acquisitions of mortgage loans and other originations and refinancing is presented in Mortgage Finance operations. The activity related to the management of our legacy mortgage portfolio is included in Corporate and Other. Our other operating segments, Automotive Finance operations and Insurance operations, were unchanged. Amounts for 2015 have been adjusted to conform to the current management view.In connection with the change in operating segments, we defined additional classes of finance receivables and loans: Mortgage Finance and Mortgage — Legacy. Mortgage Finance includes consumer mortgage loans from our ongoing mortgage operations and Mortgage — Legacy includes consumer mortgage loans originated prior to 2009.

Significant Accounting Policies

Business Combinations

We account for our business acquisitions using the acquisition method of accounting. Under this method we generally record the initial carrying values of purchased assets, including identifiable intangible assets, and assumed liabilities at fair value on the acquisition date. We recognize goodwill when the acquisition price is greater than the fair value of the net assets acquired, including identifiable intangible assets. The initial fair value of recognized assets and liabilities are subject to refinement during the measurement period, a period up to one year after the closing date of an acquisition, as information relative to closing date fair values becomes available. Costs directly related to business combinations are recorded as expenses as they are incurred.

Goodwill and Other Intangibles

Goodwill and intangible assets, net of accumulated amortization, are reported in other assets.

Our intangible assets primarily consist of acquired customer relationships and developed technology, and are amortized using a straight line methodology over their estimated useful lives. We review intangible assets for impairment at least annually, or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If it is determined the carrying amount of the asset is not recoverable, an impairment charge is recorded. Refer to Note 2 for further discussion on intangible assets.

Goodwill represents the excess of the cost of an acquisition over the fair value of net assets acquired, including identifiable intangibles. We allocate goodwill to applicable reporting units based on the relative fair value of other net assets allocated to those reporting units at the time of the acquisition. In the event we restructure our business, we may reallocate goodwill. We test goodwill for impairment annually, or more frequently if events and changes in circumstances indicate that it is more likely than not that impairment exists. Our annual goodwill impairment test is performed as of August 31 of each year. In certain situations, we may perform a qualitative assessment to test goodwill for impairment. We may also decide to bypass the qualitative assessment and perform a quantitative assessment. If we perform the qualitative assessment to test goodwill for impairment and conclude that it is more likely than not that the reporting unit’s fair value is greater than its

10

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

carrying value, then the quantitative assessment is not required. However, if we perform the qualitative assessment and determine that is it more likely than not that a reporting unit’s fair value is less than its carrying value, then we must perform the quantitative assessment. The quantitative assessment uses a two-step process. The first step of the assessment requires us to compare the fair value of each of the reporting units to their respective carrying value. The fair value of the reporting units in our quantitative assessment is determined based on various analyses including discounted cash flow projections using assumptions a market participant would use. If the carrying value is less than the fair value, no impairment exists, and the second step does not need to be completed. If the carrying value is higher than the fair value or there is an indication that impairment may exist, a second step must be performed where we determine the implied value of goodwill based on the individual fair values of the reporting unit's assets and liabilities, including unrecognized intangibles, to compute the amount of the impairment. Refer to Note 2 for further discussion on goodwill.

Income Taxes

In calculating the provision for interim income taxes, in accordance with Accounting Standards Codification (ASC) 740, Income Taxes, we apply an estimated annual effective tax rate to year-to-date ordinary income. At the end of each interim period, we estimate the effective tax rate expected to be applicable for the full fiscal year. This method differs from that described in Note 1 to the Annual Consolidated Financial Statements, which describes our annual significant income tax accounting policy and related methodology.

Investments

Our portfolio of investments includes various debt and marketable equity securities and nonmarketable equity investments. Debt and marketable equity securities are classified based on management’s intent to sell or hold the security. We classify debt securities as held-to-maturity only when we have both the intent and ability to hold the securities to maturity. We classify debt and marketable equity securities as trading when the securities are acquired for the purpose of selling or holding them for a short period of time. Securities not classified as either held-to-maturity or trading are classified as available-for-sale.

Our debt and marketable equity securities include government securities, corporate bonds, asset-backed securities (ABS), mortgage-backed securities (MBS), equity securities and other investments. Our portfolio includes securities classified as available-for-sale and held-to-maturity. Our available-for-sale securities are carried at fair value with unrealized gains and losses included in accumulated other comprehensive income or loss and are subject to impairment. Our held-to-maturity securities are carried at amortized cost and are subject to impairment.

We amortize premiums and discounts on debt securities as an adjustment to investment yield generally over the stated maturity of the security. For ABS and MBS where prepayments can be reasonably estimated, amortization is adjusted for expected prepayments.

Additionally, we assess our debt and marketable equity securities for potential other-than-temporary impairment. We employ a methodology that considers available evidence in evaluating potential other-than-temporary impairment of our debt and marketable equity securities classified as available-for-sale and held-to-maturity. If the cost of an investment exceeds its fair value, we evaluate, among other factors, the magnitude and duration of the decline in fair value. We also evaluate the financial health of and business outlook for the issuer, the performance of the underlying assets for interests in securitized assets, and, for securities classified as available-for-sale, our intent and ability to hold the investment through recovery of its amortized cost basis.

Once a decline in fair value of a debt security is determined to be other-than-temporary, an impairment charge for the credit component is recorded to other gain (loss) on investments, net, in our Consolidated Statement of Income, and a new cost basis in the investment is established. The noncredit loss component of a debt security is recorded in other comprehensive income (loss) when we do not intend to sell the security and it is not more likely than not that we will have to sell the security prior to the security's anticipated recovery. The credit and noncredit loss components are recorded in earnings when we intend to sell the security or it is more likely than not that we will have to sell the security prior to the security’s anticipated recovery. Unrealized losses that we have determined to be other-than-temporary on equity securities are recorded to other gain (loss) on investments, net in our Consolidated Statement of Income. Subsequent increases and decreases to the fair value of available-for-sale debt and equity securities are included in other comprehensive income (loss), so long as they are not attributable to another other-than-temporary impairment.

Realized gains and losses on investment securities are reported in other gain (loss) on investments, net, and are determined using the specific identification method. For information on our debt and marketable equity securities, refer to Note 6.

In addition to our investments in debt and marketable equity securities, we hold equity positions in other entities. These positions include Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock held to meet regulatory requirements, other equity investments that are not publicly traded and do not have a readily determinable fair value, equity investments in low income housing tax credits, and Community Reinvestment Act (CRA) equity investments. Our investments in FHLB and FRB stock and other equity investments are accounted for using the cost method of accounting. Our low income housing tax credit investments are accounted for using the proportionate amortization method of accounting for qualified affordable housing investments. Our CRA investments are accounted for using the equity method of accounting. Our FHLB and FRB stock and other equity investments carried at cost are included in nonmarketable equity investments in other assets. Our investments in low income housing tax credits and CRA are also included in other assets. As conditions warrant, we review our investments carried at cost for impairment and will adjust the carrying value of the investment if it is deemed to be impaired. No impairment was recognized in 2016 or 2015. For more information on our nonmarketable equity investments, refer to Note 22.

Refer to Note 1 to the Annual Consolidated Financial Statements regarding additional significant accounting policies.

11

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Recently Adopted Accounting Standards

Consolidation — Amendments to the Consolidation Analysis (ASU 2015-02)

As of January 1, 2016, we adopted ASU (Accounting Standards Update) 2015-02. The amendments in this update modify the requirements of consolidation with respect to entities that are or are similar in nature to limited partnerships or are variable interest entities (VIEs). For entities that are or are similar to limited partnerships, the guidance clarifies the evaluation of kick-out rights, removes the presumption that the general partner will consolidate and generally states that such entities will be presumed to be VIEs unless proven otherwise. For VIEs, the guidance modifies the analysis related to the evaluation of servicing fees, excludes servicing fees that are deemed commensurate with the level of service required from the determination of the primary beneficiary and clarifies certain considerations related to the consolidation analysis when performing a related party assessment. The amendments in this guidance did not impact our historical VIE and consolidation conclusions. No adjustments to our consolidated financial statements were required as a result of the adoption of this guidance.

Recently Issued Accounting Standards

Revenue from Contracts with Customers (ASU 2014-09) and Revenue from Contracts with Customers — Deferral of the Effective Date (ASU 2015-14)

In May 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-09. The purpose of this guidance is to streamline and consolidate existing revenue recognition principles in GAAP and to converge revenue recognition principles with International Financial Reporting Standards (IFRS). The core principle of the amendments is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to receive in exchange for those goods or services. The amendments include a five step process for consideration of the main principle, guidance on the accounting treatment for costs associated with a contract, and disclosure requirements related to the revenue process. As originally issued, the amendments in ASU 2014-09 were to be effective beginning on January 1, 2017. However, in August 2015, the FASB issued ASU 2015-14, which deferred the effective date of the guidance until January 1, 2018, and permitted early adoption as of the original effective date in ASU 2014-09. The FASB created a transition resource group to work with stakeholders and clarify the new guidance as necessary. The FASB has issued and is anticipating issuing additional ASUs to provide clarifying guidance and implementation support for ASU 2014-09. Management will consider these additional ASUs when assessing the overall impact of ASU 2014-09. The amendments to the revenue recognition principles can be applied on adoption either through a full retrospective application or on a modified basis with a cumulative effect adjustment on the date of initial adoption with certain practical expedients. Management has determined certain contractual arrangements are in scope of this guidance and is reviewing those in scope in order to determine the impact of the adoption of this guidance.

Financial Instruments — Recognition and Measurement of Financial Assets (ASU 2016-01)

In January 2016, the FASB issued ASU 2016-01. The amendments in this update modify the requirements related to the measurement of certain financial instruments in the statement of financial condition and results of operation. For equity investments (other than investments accounted for using the equity method), entities must measure such instruments at fair value with changes in fair value recognized in net income. Changes in fair value for available-for-sale equity securities will no longer be recognized through other comprehensive income. Reporting entities may continue to elect to measure equity investments that do not have a readily determinable fair value at cost with adjustments for impairment and observable changes in price. In addition, for a liability (other than a derivative liability) that an entity measures at fair value, any change in fair value related to the instrument-specific credit risk, that is the entity’s own-credit, should be presented separately in other comprehensive income and not as a component of net income. The amendments are effective on January 1, 2018, with early adoption permitted solely for the provisions pertaining to instrument-specific credit risk for liabilities measured at fair value. The amendments must be applied on a modified retrospective basis with a cumulative effect adjustment as of the beginning of the fiscal year of initial adoption. Management is currently evaluating the impact of the amendments. However, we do expect additional volatility in our consolidated results of operations as a result of the requirement to measure equity investments at fair value with changes in the fair value recognized in net income upon adoption.

Leases (ASU 2016-02)

In February 2016, the FASB issued ASU 2016-02. The amendments in this update primarily replace the existing accounting requirements for operating leases for lessees. Lessee accounting requirements for finance leases and lessor accounting requirements for both operating leases and sales type and direct financing leases (both of which were previously referred to as capital leases) are largely unchanged. The amendments require the lessee of an operating lease to record a balance sheet gross-up upon lease commencement by recognizing a right-to-use asset and lease liability equal to the present value of the lease payments. The right-to-use asset and lease liability should be derecognized in a manner that effectively yields a straight line lease expense over the lease term. In addition to the changes to the lessee operating lease accounting requirements, the amendments also change the types of costs that can be capitalized related to a lease agreement for both lessees and lessors for all types of leases. The amendments also require additional disclosures for all lease types for both lessees and lessors. The amendments are effective on January 1, 2019, with early adoption permitted. The amendments must be applied on a modified retrospective basis with a cumulative adjustment to the beginning of the earliest fiscal year presented in the financial statements in the period of adoption. Management is currently evaluating the impact of these amendments. Upon adoption, we expect to record a gross up in our consolidated statement of financial position upon adoption reflecting our right-to-use asset and lease liability for our operating leases where we are the lessee (for example, our facility leases). We are currently reviewing our operating lease contracts where we are the lessee to determine the impact of the gross up and the changes to capitalizable costs. We are also reviewing our leases where we are the lessor to determine the impact of the changes to capitalizable costs.

12

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Stock Compensation — Improvements to Employee Share-Based Payment Accounting (ASU 2016-09)

In March 2016, the FASB issued ASU 2016-09. The amendments in this update include changes to several aspects of share-based payment accounting. The amendments allow for an entity wide accounting policy election to either account for forfeitures as they occur or estimate the number of awards that are expected to vest. The amendments modify the tax withholding requirements to allow entities to withhold an amount up to the employee’s maximum individual statutory tax rates without resulting in a liability classification of the award as opposed to limiting the withholding to the minimum statutory tax rates. The amendments require that all excess tax benefits and tax deficiencies related to share-based payment awards should be recognized in income tax expense or benefit in the income statement in the period in which they occur. The amendments also address the classification and presentation of certain items on the cash flow statement. The amendments are effective on January 1, 2017, with early adoption permitted. The transition method varies depending on the specific amendment. We do not believe these amendments will have a material impact to the financial statements.

Financial Instruments — Credit Losses (ASU 2016-13)

In June 2016, the FASB issued ASU 2016-13. The amendments in this update introduce a new accounting model to measure credit losses for financial assets measured at amortized cost. Credit losses for financial assets measured at amortized cost should be determined based on the total current expected credit losses over the life of the financial asset or group of financial assets. In effect, the financial asset or group of financial assets should be presented at the net amount expected to be collected. Credit losses will no longer be measured as they are incurred for financial assets measured at amortized cost. The amendments also modify the accounting for available-for-sale debt securities whereby credit losses will be recorded through an allowance for credit losses rather than a write-down to the security’s cost basis, which allows for reversals of credit losses when estimated credit losses decline. Credit losses for available-for-sale debt securities should be measured in a manner similar to current GAAP. The amendments are effective on January 1, 2020, with early adoption permitted as of January 1, 2019. The amendments must be applied using a modified retrospective approach with a cumulative-effect adjustment through retained earnings as of the beginning of the fiscal year upon adoption. The new accounting model for credit losses represents a significant departure from existing GAAP, which will increase the allowance for credit losses with a resulting negative adjustment to retained earnings. Management is currently evaluating the impact of the amendments.

2.     Acquisitions

On June 1, 2016, we acquired 100% of the equity of TradeKing Group, Inc. (TradeKing), a digital wealth management company with an online broker/dealer, digital portfolio management platform, and educational content. for $298 million in cash. TradeKing will operate as a wholly owned subsidiary of Ally. The addition of brokerage and wealth management is a natural extension of our online banking franchise, creating a full suite of financial products for savings and investments. We applied the acquisition method of accounting to this transaction, which generally requires the initial recognition of assets acquired, including identifiable intangible assets, and liabilities assumed at their respective fair value. Goodwill is recognized as the excess of the acquisition price after the recognition of the net assets, including the identifiable intangible assets. Beginning in June 2016, financial information related to TradeKing is included within Corporate and Other.

The following table summarizes the allocation of cash consideration paid for TradeKing and the amounts of the identifiable assets acquired and liabilities assumed recognized at the acquisition date.

($ in millions)
Purchase price
Cash consideration	$	298
Allocation of purchase price to net assets acquired
Intangible assets (a)	82
Cash and short-term investments (b)	50
Other assets	14
Deferred tax asset, net	4
Employee compensation and benefits	(41		)
Other liabilities	(4		)
Goodwill	$	193

(a) We recorded $3 million of amortization on these intangible assets during both the three and nine months ended September 30, 2016.

(b) Includes $40 million in cash proceeds from the acquisition transaction in order to pay employee compensation and benefits that vested upon acquisition as a result of the change in control.

The goodwill of $193 million arising from the acquisition consists largely of expected growth of the business as we leverage the Ally brand and our marketing capabilities to scale the acquired technology platform and expand the suite of financial products we offer to our existing growing customer base. None of the goodwill recognized is expected to be deductible for income tax purposes. Refer to Note 11 for a reconciliation of the carrying amount of goodwill at the beginning and end of the reporting period.

On August 1, 2016, we acquired assets from Blue Yield, an online automotive lender exchange, as we continue to expand our automotive finance offerings to include a direct-to-consumer model. We completed the acquisition for $28 million of total consideration. As a result of the purchase, we recognized $20 million of goodwill within Automotive Finance operations.

13

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

3.     Discontinued Operations

Prior to the adoption of ASU 2014-08, which was prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income. The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted.

Select Automotive Finance Operations

During the fourth quarter of 2012 we entered into an agreement with General Motors Financial Company Inc. (GMF) to sell our 40% interest in a motor vehicle finance joint venture in China. On January 2, 2015, the sale of our interest in the motor vehicle finance joint venture in China was completed and an after-tax gain of approximately $400 million was recorded. The tax expense included in this gain was reduced by the release of the valuation allowance on our capital loss carryforward deferred tax asset that was utilized to offset capital gains stemming from this sale. The remaining activity relates to previous discontinued operations for which we continue to have minimal residual costs.

Other Operations

Other operations relate to previous discontinued operations for which we continue to have wind-down, legal, and minimal operational costs. Refer to Note 26 to the Condensed Consolidated Financial Statements, titled Contingencies and Other Risks, for additional discussion.

Select Financial Information

Select financial information of discontinued operations is summarized below. The pretax income or loss includes direct costs to transact a sale.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Select Automotive Finance operations
Pretax (loss) income (a)	$	(5	)	$	(1	)	$	(5	)	$	452
Tax expense (b)	2			3			2			68
Other operations
Pretax (loss) income	$	(41	)	$	(1	)	$	(39	)	$	19
Tax expense (benefit)	4			—			—			(2		)

(a) Includes certain treasury and other corporate activity recognized by Corporate and Other.

(b) Includes certain income tax activity recognized by Corporate and Other.

4.     Other Income, Net of Losses

Details of other income, net of losses, were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Remarketing fees	$	26	$	25	$	79	$	78
Late charges and other administrative fees	25		23		72		66
Servicing fees	18		12		49		32
Income from equity-method investments	3		11		14		48
Other, net	26		21		75		59
Total other income, net of losses	$	98	$	92	$	289	$	283

14

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

5.     Other Operating Expenses

Details of other operating expenses were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Insurance commissions	$	99	$	95	$	290	$	283
Technology and communications	70		65		203		198
Lease and loan administration	34		31		100		92
Advertising and marketing	27		26		75		80
Professional services	25		23		75		68
Vehicle remarketing and repossession	24		20		70		56
Regulatory and licensing fees	26		18		68		59
Premises and equipment depreciation	19		20		61		62
Occupancy	13		13		38		38
Non-income taxes	10		11		27		26
Other	71		56		182		166
Total other operating expenses	$	418	$	378	$	1,189	$	1,128

6.     Investment Securities

Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, and other investments. The cost, fair value, and gross unrealized gains and losses on investment securities were as follows.

	September 30, 2016									December 31, 2015
	Amortized cost		Gross unrealized					Fair value		Amortized cost		Gross unrealized					Fair value
($ in millions)			gains		losses							gains		losses
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	316	$	5	$	—		$	321	$	1,760	$	—	$	(19	)	$	1,741
U.S. States and political subdivisions	740		26		(3		)	763		693		24		(1		)	716
Foreign government	170		10		—			180		169		8		—			177
Mortgage-backed residential (a)	11,992		180		(29		)	12,143		10,459		52		(145		)	10,366
Mortgage-backed commercial	526		1		(3		)	524		486		—		(5		)	481
Asset-backed	1,563		8		(1		)	1,570		1,762		1		(8		)	1,755
Corporate debt	1,597		36		(3		)	1,630		1,213		8		(17		)	1,204
Total debt securities (b) (c)	16,904		266		(39		)	17,131		16,542		93		(195		)	16,440
Equity securities	631		2		(63		)	570		808		3		(94		)	717
Total available-for-sale securities	$	17,535	$	268	$	(102	)	$	17,701	$	17,350	$	96	$	(289	)	$	17,157
Total held-to-maturity securities (d)	$	649	$	10	$	(1	)	$	658	$	—	$	—	$	—		$	—

(a) Residential mortgage-backed securities include agency-backed bonds totaling $9,772 million and $7,544 million at September 30, 2016, and December 31, 2015, respectively.

(b) Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. These deposited securities totaled $15 million and $14 million at September 30, 2016, and December 31, 2015.

(c) Investment securities with a fair value of $635 million and $2,506 million at September 30, 2016, and December 31, 2015, were pledged to secure advances from the FHLB, short-term borrowings or repurchase agreements and for other purposes as required by contractual obligation or law. Under these agreements, Ally has granted the counterparty the right to sell or pledge $635 million and $745 million of the underlying investment securities at September 30, 2016, and December 31, 2015, respectively.

(d) Held-to-maturity securities are recorded at amortized cost and consist of agency-backed residential mortgage-backed debt securities for liquidity purposes.

15

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The maturity distribution of investment securities outstanding is summarized in the following tables. Call or prepayment options may cause actual maturities to differ from contractual maturities.

	Total				Due in one year or less				Due after one year through five years				Due after five years through ten years				Due after ten years
($ in millions)	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield
September 30, 2016
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	321	1.7	%	$	2	4.3	%	$	10	1.7	%	$	309	1.7	%	$	—	—	%
U.S. States and political subdivisions	763		3.1		115		2.4		24		2.4		143		3.0		481		3.4
Foreign government	180		2.6		—		—		73		2.9		107		2.5		—		—
Mortgage-backed residential	12,143		2.9		—		—		—		—		34		2.5		12,109		2.9
Mortgage-backed commercial	524		2.4		—		—		—		—		3		2.8		521		2.4
Asset-backed	1,570		2.7		—		—		1,059		2.6		300		3.3		211		2.5
Corporate debt	1,630		2.9		50		2.3		949		2.6		591		3.2		40		4.7
Total available-for-sale debt securities	$	17,131	2.9		$	167	2.4		$	2,115	2.6		$	1,487	2.8		$	13,362	2.9
Amortized cost of available-for-sale debt securities	$	16,904			$	168			$	2,093			$	1,449			$	13,194
Amortized cost of held-to-maturity securities	$	649	2.9	%	$	—	—	%	$	—	—	%	$	—	—	%	$	649	2.9	%
December 31, 2015
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	1,741	1.8	%	$	6	5.1	%	$	510	1.2	%	$	1,225	2.1	%	$	—	—	%
U.S. States and political subdivisions	716		3.2		86		1.3		37		2.2		141		2.8		452		3.7
Foreign government	177		2.6		9		1.9		77		2.8		91		2.6		—		—
Mortgage-backed residential	10,366		2.9		—		—		33		2.1		36		2.5		10,297		2.9
Mortgage-backed commercial	481		2.0		—		—		—		—		3		2.7		478		2.0
Asset-backed	1,755		2.3		6		1.4		1,027		2.1		518		2.6		204		2.2
Corporate debt	1,204		2.9		50		3.0		713		2.5		410		3.4		31		5.4
Total available-for-sale debt securities	$	16,440	2.7		$	157	2.0		$	2,397	2.1		$	2,424	2.5		$	11,462	2.9
Amortized cost of available-for-sale debt securities	$	16,542			$	156			$	2,404			$	2,436			$	11,546

(a) Yield is calculated using the effective yield of each security at the end of the period, weighted based on the market value. The effective yield considers the contractual coupon and amortized cost, and excludes expected capital gains and losses.

The balances of cash equivalents were $0.8 billion and $1.0 billion at September 30, 2016, and December 31, 2015, respectively, and were composed primarily of money market accounts and short-term securities, including U.S. Treasury bills.

The following table presents interest and dividends on investment securities.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Taxable interest	$	93	$	90	$	276	$	252
Taxable dividends	4		7		13		18
Interest and dividends exempt from U.S. federal income tax	4		5		13		13
Interest and dividends on investment securities	$	101	$	102	$	302	$	283

16

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016		2015			2016			2015
Gross realized gains	$	52	$	28		$	146		$	134
Gross realized losses (a)	—		(11		)	(1		)	(14		)
Other-than-temporary impairment	—		(11		)	—			(14		)
Other gain on investments, net	$	52	$	6		$	145		$	106

(a) Certain available-for-sale securities were sold at a loss in 2016 and 2015 as a result of changing conditions within these respective periods (e.g., a downgrade in the rating of a debt security). Any such sales were made in accordance with our risk management policies and practices.

The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the assessment of whether such losses were deemed to be other-than-temporary, we believe that the unrealized losses are not indicative of an other-than-temporary impairment of these securities. As of September 30, 2016, we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis, and we expect to recover the entire amortized cost basis of the securities. As of September 30, 2016, we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at September 30, 2016. Refer to Note 1 for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments.

	September 30, 2016										December 31, 2015
	Less than 12 months					12 months or longer					Less than 12 months					12 months or longer
($ in millions)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	—	$	—		$	—	$	—		$	1,553	$	(17	)	$	173	$	(2	)
U.S. States and political subdivisions	254		(2		)	11		(1		)	179		(1		)	—		—
Foreign government	—		—			—		—			2		—			—		—
Mortgage-backed	948		(4		)	1,786		(28		)	4,096		(43		)	2,453		(107		)
Asset-backed	406		(1		)	140		—			1,402		(8		)	64		—
Corporate debt	134		(1		)	50		(2		)	745		(16		)	12		(1		)
Total temporarily impaired debt securities	1,742		(8		)	1,987		(31		)	7,977		(85		)	2,702		(110		)
Temporarily impaired equity securities	148		(12		)	329		(51		)	534		(54		)	96		(40		)
Total temporarily impaired available-for-sale securities	$	1,890	$	(20	)	$	2,316	$	(82	)	$	8,511	$	(139	)	$	2,798	$	(150	)

17

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

7.     Finance Receivables and Loans, Net

The composition of finance receivables and loans reported at gross carrying value was as follows.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive (a)	$	64,816	$	64,292
Consumer mortgage
Mortgage Finance (b)	7,931		6,413
Mortgage — Legacy (c)	2,926		3,360
Total consumer mortgage	10,857		9,773
Total consumer	75,673		74,065
Commercial
Commercial and industrial
Automotive	32,260		31,469
Other	3,250		2,640
Commercial real estate — Automotive	3,776		3,426
Total commercial	39,286		37,535
Total finance receivables and loans (d)	$	114,959	$	111,600

(a) Includes $66 million of fair value adjustment for loans in hedge accounting relationships at both September 30, 2016, and December 31, 2015. Refer to Note 20 for additional information.

(b) Includes loans originated as interest-only mortgage loans of $32 million and $44 million at September 30, 2016, and December 31, 2015, respectively, none of which are expected to start principal amortization in 2016, 3% in 2017, none in 2018, 39% in 2019, and 39% thereafter.

(c) Includes loans originated as interest-only mortgage loans of $771 million and $941 million at September 30, 2016, and December 31, 2015, respectively, 8% of which are expected to start principal amortization in 2016, 23% in 2017, 2% in 2018, none in 2019, and 1% thereafter.

(d) Totals include a net increase of $310 million and $110 million at September 30, 2016, and December 31, 2015, respectively, for unearned income, unamortized premiums and discounts, and deferred fees and costs.

The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans.

Three months ended September 30, 2016 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial		Total
Allowance at July 1, 2016	$	862		$	109		$	118	$	1,089
Charge-offs	(293		)	(10		)	—		(303		)
Recoveries	74			16			—		90
Net charge-offs	(219		)	6			—		(213		)
Provision for loan losses	269			(15		)	4		258
Allowance at September 30, 2016	$	912		$	100		$	122	$	1,134

Three months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at July 1, 2015	$	767		$	119		$	88		$	974
Charge-offs	(220		)	(10		)	(1		)	(231		)
Recoveries	64			4			2			70
Net charge-offs	(156		)	(6		)	1			(161		)
Provision for loan losses	200			6			5			211
Other (a)	(7		)	—			1			(6		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018

(a)    Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

18

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, 2016($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2016	$	834		$	114		$	106		$	1,054
Charge-offs	(773		)	(29		)	(1		)	(803		)
Recoveries	233			25			1			259
Net charge-offs	(540		)	(4		)	—			(544		)
Provision for loan losses	644			(10		)	16			650
Other (a)	(26		)	—			—			(26		)
Allowance at September 30, 2016	$	912		$	100		$	122		$	1,134
Allowance for loan losses at September 30, 2016
Individually evaluated for impairment	$	24		$	35		$	25		$	84
Collectively evaluated for impairment	888			65			97			1,050
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	64,816		$	10,857		$	39,286		$	114,959
Individually evaluated for impairment	349			251			111			711
Collectively evaluated for impairment	64,467			10,606			39,175			114,248
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Nine months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2015	$	685		$	152		$	140		$	977
Charge-offs	(579		)	(41		)	(1		)	(621		)
Recoveries	195			12			3			210
Net charge-offs	(384		)	(29		)	2			(411		)
Provision for loan losses	510			4			(47		)	467
Other (a)	(7		)	(8		)	—			(15		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018
Allowance for loan losses at September 30, 2015
Individually evaluated for impairment	$	22		$	48		$	19		$	89
Collectively evaluated for impairment	782			71			76			929
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	63,610		$	9,769		$	34,611		$	107,990
Individually evaluated for impairment	285			268			75			628
Collectively evaluated for impairment	63,325			9,501			34,536			107,362
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

The following table presents the gross carrying value of significant sales of finance receivables and loans and transfers of finance receivables and loans from held-for-investment to held-for-sale.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	57	$	704	$	4,216	$	704
Consumer mortgage	6		2		12		75
Commercial	—		1		28		1
Total sales and transfers	$	63	$	707	$	4,256	$	780

19

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following table presents information about significant purchases of finance receivables and loans.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	—	$	272	$	—	$	272
Consumer mortgage	467		990		2,855		3,640
Total purchases of finance receivables and loans	$	467	$	1,262	$	2,855	$	3,912

The following table presents an analysis of our past due finance receivables and loans recorded at gross carrying value.

($ in millions)	30-59 days past due		60-89 days past due		90 days or more past due		Total past due		Current		Total finance receivables and loans
September 30, 2016
Consumer automotive	$	1,584	$	343	$	260	$	2,187	$	62,629	$	64,816
Consumer mortgage
Mortgage Finance	64		4		4		72		7,859		7,931
Mortgage — Legacy	49		12		60		121		2,805		2,926
Total consumer mortgage	113		16		64		193		10,664		10,857
Total consumer	1,697		359		324		2,380		73,293		75,673
Commercial
Commercial and industrial
Automotive	—		—		—		—		32,260		32,260
Other	—		—		—		—		3,250		3,250
Commercial real estate — Automotive	—		—		—		—		3,776		3,776
Total commercial	—		—		—		—		39,286		39,286
Total consumer and commercial	$	1,697	$	359	$	324	$	2,380	$	112,579	$	114,959
December 31, 2015
Consumer automotive	$	1,618	$	369	$	222	$	2,209	$	62,083	$	64,292
Consumer mortgage
Mortgage Finance	44		5		10		59		6,354		6,413
Mortgage — Legacy	53		20		73		146		3,214		3,360
Total consumer mortgage	97		25		83		205		9,568		9,773
Total consumer	1,715		394		305		2,414		71,651		74,065
Commercial
Commercial and industrial
Automotive	—		—		—		—		31,469		31,469
Other	—		—		—		—		2,640		2,640
Commercial real estate — Automotive	—		—		—		—		3,426		3,426
Total commercial	—		—		—		—		37,535		37,535
Total consumer and commercial	$	1,715	$	394	$	305	$	2,414	$	109,186	$	111,600

20

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following table presents the gross carrying value of our finance receivables and loans on nonaccrual status.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive	$	542	$	475
Consumer mortgage
Mortgage Finance	9		15
Mortgage — Legacy	91		113
Total consumer mortgage	100		128
Total consumer	642		603
Commercial
Commercial and industrial
Automotive	44		25
Other	62		44
Commercial real estate — Automotive	5		8
Total commercial	111		77
Total consumer and commercial finance receivables and loans	$	753	$	680

Management performs a quarterly analysis of the consumer automotive, consumer mortgage, and commercial portfolios using a range of credit quality indicators to assess the adequacy of the allowance for loan losses based on historical and current trends. The following tables present the population of loans by quality indicators for our consumer automotive, consumer mortgage, and commercial portfolios.

The following table presents performing and nonperforming credit quality indicators in accordance with our internal accounting policies for our consumer finance receivables and loans recorded at gross carrying value. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is not expected. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

	September 30, 2016						December 31, 2015
($ in millions)	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Consumer automotive	$	64,274	$	542	$	64,816	$	63,817	$	475	$	64,292
Consumer mortgage
Mortgage Finance	7,922		9		7,931		6,398		15		6,413
Mortgage — Legacy	2,835		91		2,926		3,247		113		3,360
Total consumer mortgage	10,757		100		10,857		9,645		128		9,773
Total consumer	$	75,031	$	642	$	75,673	$	73,462	$	603	$	74,065

The following table presents pass and criticized credit quality indicators based on regulatory definitions for our commercial finance receivables and loans recorded at gross carrying value.

	September 30, 2016						December 31, 2015
($ in millions)	Pass		Criticized (a)		Total		Pass		Criticized (a)		Total
Commercial and industrial
Automotive	$	30,355	$	1,905	$	32,260	$	29,613	$	1,856	$	31,469
Other	2,574		676		3,250		2,122		518		2,640
Commercial real estate — Automotive	3,600		176		3,776		3,265		161		3,426
Total commercial	$	36,529	$	2,757	$	39,286	$	35,000	$	2,535	$	37,535

(a) Includes loans classified as special mention, substandard, or doubtful. These classifications are based on regulatory definitions and generally represent loans within our portfolio that have a higher default risk or have already defaulted.

Impaired Loans and Troubled Debt Restructurings

Impaired Loans

Loans are considered impaired when we determine it is probable that we will be unable to collect all amounts due according to the terms of the loan agreement. For more information on our impaired finance receivables and loans, refer to Note 1 to the Annual Consolidated Financial Statements.

21

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following table presents information about our impaired finance receivables and loans.

($ in millions)	Unpaid principal balance (a)		Gross carrying value		Impaired with no allowance		Impaired with an allowance		Allowance for impaired loans
September 30, 2016
Consumer automotive	$	385	$	349	$	124	$	225	$	24
Consumer mortgage
Mortgage Finance	7		7		3		4		—
Mortgage — Legacy	248		244		56		188		35
Total consumer mortgage	255		251		59		192		35
Total consumer	640		600		183		417		59
Commercial
Commercial and industrial
Automotive	44		44		10		34		6
Other	76		62		—		62		18
Commercial real estate — Automotive	5		5		1		4		1
Total commercial	125		111		11		100		25
Total consumer and commercial finance receivables and loans	$	765	$	711	$	194	$	517	$	84
December 31, 2015
Consumer automotive	$	315	$	315	$	—	$	315	$	22
Consumer mortgage
Mortgage Finance	9		9		5		4		1
Mortgage — Legacy	260		257		59		198		43
Total consumer mortgage	269		266		64		202		44
Total consumer	584		581		64		517		66
Commercial
Commercial and industrial
Automotive	25		25		4		21		3
Other	44		44		—		44		15
Commercial real estate — Automotive	8		8		1		7		2
Total commercial	77		77		5		72		20
Total consumer and commercial finance receivables and loans	$	661	$	658	$	69	$	589	$	86

(a) Adjusted for charge-offs.

22

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following tables present average balance and interest income for our impaired finance receivables and loans.

	2016				2015
Three months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	347	$	4	$	288	$	4
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	245		2		261		3
Total consumer mortgage	253		2		268		3
Total consumer	600		6		556		7
Commercial
Commercial and industrial
Automotive	48		1		36		—
Other	63		—		45		—
Commercial real estate — Automotive	6		—		6		—
Total commercial	117		1		87		—
Total consumer and commercial finance receivables and loans	$	717	$	7	$	643	$	7

	2016				2015
Nine months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	340	$	12	$	291	$	13
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	250		7		276		7
Total consumer mortgage	258		7		283		7
Total consumer	598		19		574		20
Commercial
Commercial and industrial
Automotive	35		1		35		1
Other	58		1		39		3
Commercial real estate — Automotive	6		—		5		—
Total commercial	99		2		79		4
Total consumer and commercial finance receivables and loans	$	697	$	21	$	653	$	24

Troubled Debt Restructurings

Troubled Debt Restructurings (TDRs) are loan modifications where concessions were granted to borrowers experiencing financial difficulties. For mortgage loans, as part of our participation in certain governmental programs, we offer mortgage loan modifications to qualified borrowers. Numerous initiatives are in place to provide support to our mortgage customers in financial distress, including principal forgiveness, maturity extensions, delinquent interest capitalization, and changes to contractual interest rates. Additionally, for automotive loans, we may offer several types of assistance to aid our customers, including extension of the loan maturity date and rewriting the loan terms. Total TDRs recorded at gross carrying value were $640 million and $625 million at September 30, 2016, and December 31, 2015, respectively. Commercial commitments to lend additional funds to borrowers owing receivables whose terms had been modified in a TDR were $2 million, at both September 30, 2016, and December 31, 2015. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

23

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following tables present information related to finance receivables and loans recorded at gross carrying value modified in connection with a TDR during the period.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	4,427	$	70	$	58	4,612	$	75	$	66
Consumer mortgage
Mortgage Finance	2	—		—		3	2		2
Mortgage — Legacy	35	6		6		50	11		11
Total consumer mortgage	37	6		6		53	13		13
Total consumer	4,464	76		64		4,665	88		79
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	4,464	$	76	$	64	4,667	$	112	$	103

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	14,816	$	238	$	202	12,763	$	202	$	173
Consumer mortgage
Mortgage Finance	5	2		2		5	3		3
Mortgage — Legacy	92	14		14		164	39		37
Total consumer mortgage	97	16		16		169	42		40
Total consumer	14,913	254		218		12,932	244		213
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	14,913	$	254	$	218	12,934	$	268	$	237

24

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following tables present information about finance receivables and loans recorded at gross carrying value that have redefaulted during the reporting period and were within 12 months or less of being modified as a TDR. Redefault is when finance receivables and loans meet the requirements for evaluation under our charge-off policy (refer to Note 1 to the Annual Consolidated Financial Statements for additional information) except for commercial finance receivables and loans, where redefault is defined as 90 days past due.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	1,959	$	23	$	14	1,742	$	21	$	12
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	1	—		—		2	1		—
Total consumer finance receivables and loans	1,960	$	23	$	14	1,744	$	22	$	12

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	5,617	$	69	$	39	4,822	$	58	$	33
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	4	—		—		9	1		—
Total consumer finance receivables and loans	5,621	$	69	$	39	4,831	$	59	$	33

8.     Investment in Operating Leases, Net

Investments in operating leases were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Vehicles	$	16,086		$	20,211
Accumulated depreciation	(3,397		)	(3,940		)
Investment in operating leases, net	$	12,689		$	16,271

Depreciation expense on operating lease assets includes remarketing gains and losses recognized on the sale of operating lease assets. The following summarizes the components of depreciation expense on operating lease assets.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Depreciation expense on operating lease assets (excluding remarketing gains)	$	470		$	633		$	1,555		$	1,995
Remarketing gains	(62		)	(105		)	(203		)	(282		)
Net depreciation expense on operating lease assets	$	408		$	528		$	1,352		$	1,713

9.    Securitizations and Variable Interest Entities

We are involved in several types of securitization and financing transactions that utilize special-purpose entities (SPEs). A SPE is an entity that is designed to fulfill a specified limited need of the sponsor. Our principal use of SPEs is to obtain liquidity by securitizing certain of our financial assets and operating lease assets.

The transaction-specific SPEs involved in our securitization and other financing transactions are often considered VIEs. VIEs are entities that have either a total equity investment at risk that is insufficient to permit the entity to finance its activities without additional subordinated financial support or whose equity investors at risk lack the ability to control the entity's activities.

We provide a wide range of consumer and commercial automotive loans, operating leases, and commercial loans to a diverse customer base. We securitize consumer and commercial automotive loans, and operating leases through private-label securitizations. We often securitize these loans and notes secured by operating leases (collectively referred to as financial assets) through the use of securitization entities, which may or may not be consolidated on our Condensed Consolidated Balance Sheet.

25

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

We provide long-term guarantee contracts to investors in certain nonconsolidated affordable housing entities and have extended a line of credit to provide liquidity and minimize our exposure under these contracts. Since we do not have control over the entities or the power to make decisions, we do not consolidate the entities and our involvement is limited to the guarantee and the line of credit.

We have involvement with various other nonconsolidated equity investments, including affordable housing entities and venture capital funds and loan funds. We do not consolidate these entities and our involvement is limited to our outstanding investment, additional capital committed to these funds plus any previously recognized low income housing tax credits that are subject to recapture.

Refer to Note 10 to the Annual Consolidated Financial Statements for further description of our securitization activities and our involvement with VIEs.

Our involvement with consolidated and nonconsolidated VIEs in which we hold variable interests is presented below.

($ in millions)	Involvement with VIEs			Assets of nonconsolidated VIEs (a)			Maximum exposure to loss in nonconsolidated VIEs
September 30, 2016
On-balance sheet variable interest entities
Consumer automotive	$	23,608	(b)
Commercial automotive	15,746
Off-balance sheet variable interest entities
Consumer automotive	24			$	3,240	(c)	$	3,264	(d)
Commercial other	268		(e)	—		(c)	556		(f)
Total	$	39,646		$	3,240		$	3,820
December 31, 2015
On-balance sheet variable interest entities
Consumer automotive	$	27,967	(b)
Commercial automotive	16,763
Off-balance sheet variable interest entities
Consumer automotive	—			$	3,034		$	3,034	(d)
Commercial other	210		(e)	—		(c)	493		(f)
Total	$	44,940		$	3,034		$	3,527

(a) Asset values represent the current unpaid principal balance of outstanding consumer finance receivables and loans within the VIEs.

(b) Includes $10.0 billion and $10.6 billion of assets that are not encumbered by VIE beneficial interests held by third parties at September 30, 2016, and December 31, 2015, respectively. Ally or consolidated affiliates hold the interests in these assets which eliminate in consolidation.

(c) Includes VIEs for which we have no management oversight and therefore we are not able to provide the total assets of the VIEs.

(d) Maximum exposure to loss represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions and certain noncertificated interests retained from the sale of automotive finance receivables. This measure is based on the unlikely event that all of the loans have underwriting defects or other defects that trigger a representation and warranty provision and the collateral supporting the loans are worthless. This required disclosure is not an indication of our expected loss.

(e) Includes $276 million and $222 million classified as other assets, offset by $8 million and $12 million classified as accrued expenses and other liabilities at September 30, 2016, and December 31, 2015, respectively.

(f) For certain nonconsolidated affordable housing entities, maximum exposure to loss represents the yield we guaranteed investors through long term guarantee contracts. The amount disclosed is based on the unlikely event that the underlying properties cease generating yield to investors and the yield delivered to investors in the form of low income tax housing credits is recaptured. For nonconsolidated equity investments, maximum exposure to loss represents our outstanding investment, additional committed capital, and low income housing tax credits subject to recapture. The amount disclosed is based on the unlikely event that our committed capital is funded, our investments become worthless, and the tax credits previously delivered to us are recaptured. This required disclosure is not an indication of our expected loss.

26

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Cash Flows with Off-balance Sheet Securitization Entities

The following table summarizes cash flows received and paid related to securitization entities and asset-backed financings where the transfer is accounted for as a sale and we have a continuing involvement with the transferred assets (e.g., servicing) that were outstanding during the nine months endedSeptember 30, 2016, and 2015. Additionally, this table contains information regarding cash flows received from and paid to nonconsolidated securitization entities that existed during each period.

Nine months ended September 30, ($ in millions)	Consumer automotive
2016
Cash proceeds from transfers completed during the period	$	1,659
Servicing fees	27
Other cash flows	6
2015
Cash proceeds from transfers completed during the period	$	1,044
Servicing fees	21

Delinquencies and Net Credit Losses

The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses.

	Total Amount				Amount 60 days or more past due
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
On-balance sheet loans
Consumer automotive	$	64,816	$	64,292	$	603	$	591
Consumer mortgage	10,857		9,773		80		108
Commercial automotive	36,036		34,895		—		—
Commercial other	3,306		2,745		—		—
Total on-balance sheet loans	115,015		111,705		683		699
Off-balance sheet securitization entities
Consumer automotive	2,734		2,529		11		9
Total off-balance sheet securitization entities	2,734		2,529		11		9
Whole-loan sales (a)	3,556		2,252		6		13
Total	$	121,305	$	116,486	$	700	$	721

(a) Whole-loan sales are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors.

27

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

	Net credit losses
	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016		2015
On-balance sheet loans
Consumer automotive	$	219		$	156		$	540	$	384
Consumer mortgage	(6		)	6			4		29
Commercial automotive	—			—			—		—
Commercial other	—			(1		)	—		(2		)
Total on-balance sheet loans	213			161			544		411
Off-balance sheet securitization entities
Consumer automotive	2			1			6		3
Total off-balance sheet securitization entities	2			1			6		3
Whole-loan sales	1			—			2		—
Total	$	216		$	162		$	552	$	414

10.     Servicing Activities

Automotive Finance Servicing Activities

We service consumer automotive contracts. Historically, we have sold a portion of our consumer automotive contracts. With respect to contracts we sell, we retain the right to service and earn a servicing fee for our servicing function. We have concluded that the fee we are paid for servicing consumer automotive finance receivables represents adequate compensation, and consequently, we do not recognize a servicing asset or liability. We recognized automotive servicing fee income of $18 million and $49 million during the three months and nine months endedSeptember 30, 2016, respectively, compared to $12 million and $32 million during the three months and nine months endedSeptember 30, 2015.

Automotive Finance Serviced Assets

The current unpaid principal balance and any related unamortized deferred fees and costs of total serviced automotive finance loans and leases outstanding were as follows.

($ in millions)	September 30, 2016		December 31, 2015
On-balance sheet automotive finance loans and leases
Consumer automotive	$	64,672	$	64,067
Commercial automotive	36,036		34,895
Operating leases	12,497		15,965
Other	68		72
Off-balance sheet automotive finance loans
Securitizations	2,760		2,550
Whole-loan	3,592		2,259
Total serviced automotive finance loans and leases	$	119,625	$	119,808

28

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

11.     Other Assets

The components of other assets were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Property and equipment at cost	$	838		$	691
Accumulated depreciation	(507		)	(456		)
Net property and equipment	331			235
Restricted cash collections for securitization trusts (a)	1,473			2,010
Net deferred tax assets	967			1,369
Nonmarketable equity investments (b)	818			418
Other accounts receivable	447			158
Accrued interest and rent receivables	408			402
Goodwill (c)	240			27
Cash reserve deposits held-for-securitization trusts (d)	188			252
Fair value of derivative contracts in receivable position (e)	141			233
Restricted cash and cash equivalents	98			120
Cash collateral placed with counterparties	78			125
Other assets	1,118			972
Total other assets	$	6,307		$	6,321

(a) Represents cash collections from customer payments on securitized receivables. These funds are distributed to investors as payments on the related secured debt.

(b) Includes investments in FHLB stock of $352 million and $391 million and FRB stock of $435 million and $0 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes goodwill of $27 million at our Insurance operations at both September 30, 2016, and December 31, 2015, $193 million and $0 million within Corporate and Other at September 30, 2016, and December 31, 2015, respectively, and $20 million and $0 million within Automotive Finance operations at September 30, 2016, and December 31, 2015, respectively. As a result of our acquisition of TradeKing, we recognized $193 million of goodwill within Corporate and Other on June 1, 2016. On August 1, 2016, we purchased assets from Blue Yield. As a result of this purchase, we recognized $20 million of goodwill within Automotive Finance operations. No other changes in the carrying amount of goodwill were recorded during the nine months endedSeptember 30, 2016.

(d) Represents credit enhancement in the form of cash reserves for various securitization transactions.

(e) For additional information on derivative instruments and hedging activities, refer to Note 20.

12.    Deposit Liabilities

Deposit liabilities consisted of the following.

($ in millions)	September 30, 2016		December 31, 2015
Noninterest-bearing deposits	$	101	$	89
Interest-bearing deposits
Savings and money market checking accounts	44,846		36,386
Certificates of deposit	30,604		29,774
Dealer deposits	193		229
Total deposit liabilities	$	75,744	$	66,478

At September 30, 2016, and December 31, 2015, certificates of deposit included $11.5 billion of certificates of deposit in denominations of $100 thousand or more. At September 30, 2016, and December 31, 2015, certificates of deposit included $3.1 billion and $3.2 billion, respectively, in denominations in excess of $250 thousand federal insurance limits.

29

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

13.    Short-term Borrowings

The following table presents the composition of our short-term borrowings portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured (a)		Total		Unsecured		Secured (a)		Total
Demand notes	$	3,525	$	—	$	3,525	$	3,369	$	—	$	3,369
Federal Home Loan Bank	—		2,250		2,250		—		4,000		4,000
Securities sold under agreements to repurchase	—		659		659		—		648		648
Other	—		—		—		84		—		84
Total short-term borrowings	$	3,525	$	2,909	$	6,434	$	3,453	$	4,648	$	8,101

(a) Refer to Note 14 for further details on assets restricted as collateral for payment of the related debt.

We periodically enter into term repurchase agreements, short-term borrowing agreements in which we sell financial instruments to one or more investors while simultaneously committing to repurchase them at a specified future date, at the stated price plus accrued interest. As of September 30, 2016, the financial instruments sold under agreement to repurchase consisted of mortgage-backed residential securities with the following maturities: $304 millionwithin the next 30 days and$355 millionwithin 31 to 60 days. Refer to Note 6 and Note 23 for further details on investment securities sold under agreements to repurchase.

The primary risk associated with these repurchase agreements is that the counterparty will be unable to perform under the terms of the contract. As the borrower, we are exposed to the excess market value of the securities pledged over the amount borrowed. Daily mark-to-market collateral management is designed to limit this risk to the initial margin. However, should a counterparty declare bankruptcy or become insolvent, we may incur additional delays and costs. As of September 30, 2016, we placed cash collateral totaling $7 million with counterparties under these collateral arrangements associated with our repurchase agreements.

14.    Long-term Debt

The following table presents the composition of our long-term debt portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured		Total		Unsecured		Secured			Total
Long-term debt
Due within one year	$	3,279	$	11,805	$	15,084	$	1,829	$	9,427		$	11,256
Due after one year (a)	16,410		24,861		41,271		18,803		35,844			54,647
Fair value adjustment (b)	471		10		481		334		(3		)	331
Total long-term debt (c)	$	20,160	$	36,676	$	56,836	$	20,966	$	45,268		$	66,234

(a) Includes $2.6 billion of trust preferred securities at both September 30, 2016, and December 31, 2015.

(b) Represents the fair value adjustment associated with the application of hedge accounting on certain of our long-term debt positions. Refer to Note 20 for additional information.

(c) Includes advances from the Federal Home Loan Bank of Pittsburgh of $6.1 billion and $5.4 billion at September 30, 2016, and December 31, 2015, respectively.

The following table presents the scheduled remaining maturity of long-term debt at September 30, 2016, assuming no early redemptions will occur. The actual payment of secured debt may vary based on the payment activity of the related pledged assets.

($ in millions)	2016			2017			2018			2019			2020			2021 and thereafter			Fair value adjustment		Total
Unsecured
Long-term debt	$	19		$	4,365		$	3,700		$	1,662		$	2,212		$	9,078		$	471	$	21,507
Original issue discount	(21		)	(91		)	(101		)	(39		)	(39		)	(1,056		)	—		(1,347		)
Total unsecured	(2		)	4,274			3,599			1,623			2,173			8,022			471		20,160
Secured
Long-term debt	2,118			11,855			7,512			7,197			4,155			3,829			10		36,676
Total long-term debt	$	2,116		$	16,129		$	11,111		$	8,820		$	6,328		$	11,851		$	481	$	56,836

30

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following summarizes assets restricted as collateral for the payment of the related debt obligation primarily arising from securitization transactions accounted for as secured borrowings and repurchase agreements.

	September 30, 2016					December 31, 2015
($ in millions)	Total			Ally Bank (a)		Total			Ally Bank (a)
Investment securities(b)	$	586		$	—	$	2,420		$	1,761
Mortgage assets held-for-investment and lending receivables	10,770			10,770		9,743			9,743
Consumer automotive finance receivables	28,870			5,485		34,324			9,167
Commercial automotive finance receivables	19,275			19,020		19,623			19,177
Investment in operating leases, net	2,706			1,290		5,539			3,205
Other assets (b)	93			—		—			—
Total assets restricted as collateral (c) (d)	$	62,300		$	36,565	$	71,649		$	43,053
Secured debt	$	39,585	(e)	$	17,736	$	49,916	(e)	$	24,787

(a) Ally Bank is a component of the total column.

(b) Certain investment securities and other assets are restricted under repurchase agreements. Refer to Note 13 for information on the repurchase agreements.

(c) Ally Bank has an advance agreement with the FHLB, and had assets pledged to secure borrowings that were restricted as collateral to the FHLB totaling $14.5 billion and $14.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed primarily of consumer mortgage finance receivables and loans, net and investment securities. Ally Bank has access to the Federal Reserve Bank Discount Window. Ally Bank had assets pledged and restricted as collateral to the Federal Reserve Bank totaling $2.4 billion and $2.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed of consumer automotive finance receivables and loans, net and investment in operating leases, net. Availability under these programs is only for the operations of Ally Bank and cannot be used to fund the operations or liabilities of Ally or its subsidiaries.

(d) Excludes restricted cash and cash reserves for securitization trusts recorded within other assets on the Condensed Consolidated Balance Sheet. Refer to Note 11 for additional information.

(e) Includes $2.9 billion and $4.6 billion of short-term borrowings at September 30, 2016, and December 31, 2015, respectively.

Trust Preferred Securities

At September 30, 2016, we have issued and outstanding approximately $2.6 billion in aggregate liquidation preference of 8.125% Fixed Rate / Floating Rate Trust Preferred Securities, Series 2 (Series 2 TRUPS) net of original issue discount and debt issuance costs. Each Series 2 TRUPS security has a liquidation amount of $25. Distributions are cumulative and are payable until redemption at the applicable coupon rate. Distributions were payable at an annual rate of 8.125% payable quarterly in arrears, through but excluding February 15, 2016. From and including February 15, 2016, to but excluding February 15, 2040, distributions will be payable at an annual rate equal to three-month London interbank offer rate plus 5.785% payable quarterly in arrears, beginning May 15, 2016. Ally has the right to defer payments of interest for a period not exceeding 20 consecutive quarters. The Series 2 TRUPS have no stated maturity date, but must be redeemed upon the redemption or maturity of the related debentures (Debentures), which mature on February 15, 2040. Ally at any time on or after February 15, 2016 may redeem the Series 2 TRUPS at a redemption price equal to 100% of the principal amount being redeemed, plus accrued and unpaid interest through the date of redemption. The Series 2 TRUPS are generally nonvoting, other than with respect to certain limited matters. During any period in which any Series 2 TRUPS remain outstanding but in which distributions on the Series 2 TRUPS have not been fully paid, none of Ally or its subsidiaries will be permitted to (i) declare or pay dividends on, make any distributions with respect to, or redeem, purchase, acquire or otherwise make a liquidation payment with respect to, any of Ally’s capital stock or make any guarantee payment with respect thereto; or (ii) make any payments of principal, interest, or premium on, or repay, repurchase or redeem, any debt securities or guarantees that rank on a parity with or junior in interest to the Debentures with certain specified exceptions in each case.

Funding Facilities

We utilize both committed credit facilities and other collateralized funding vehicles. The debt outstanding under our various funding facilities is included on our Condensed Consolidated Balance Sheet.

As of September 30, 2016, Ally Bank had exclusive access to $3.6 billion of funding capacity from committed credit facilities. Funding programs supported by the Federal Reserve and the FHLB, together with repurchase agreements, complement Ally Bank’s private collateralized funding vehicles.

The total capacity in our committed funding facilities is provided by banks and other financial institutions through private transactions. The committed secured funding facilities can be revolving in nature and allow for additional funding during the commitment period, or they can be amortizing and not allow for any further funding after the closing date. At September 30, 2016, all of our $18.1 billion of committed capacity was revolving. Our revolving facilities generally have an original tenor ranging from 364 days to two years. As of September 30, 2016, we had $14.1 billion of committed funding capacity from revolving facilities with a remaining tenor greater than 364 days.

31

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Committed Funding Facilities

	Outstanding				Unused capacity (a)				Total capacity
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Bank funding
Secured (b)	$	2,950	$	3,250	$	650	$	—	$	3,600	$	3,250
Parent funding
Secured	11,725		16,914		2,800		251		14,525		17,165
Total committed facilities	$	14,675	$	20,164	$	3,450	$	251	$	18,125	$	20,415

(a) Funding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

(b) Excludes off-balance sheet credit facility amounts.

15.    Accrued Expenses and Other Liabilities

The components of accrued expenses and other liabilities were as follows.

($ in millions)	September 30, 2016		December 31, 2015
Accounts payable	$	781	$	391
Employee compensation and benefits	218		242
Reserves for insurance losses and loss adjustment expenses	150		169
Cash collateral received from counterparties	113		82
Deferred revenue	66		108
Fair value of derivative contracts in payable position (a)	46		145
Other liabilities	424		408
Total accrued expenses and other liabilities	$	1,798	$	1,545

(a) For additional information on derivative instruments and hedging activities, refer to Note 20.

16.    Preferred Stock

The following table summarizes information about our Series A Preferred Stock.

	September 30, 2016			December 31, 2015
Series A preferred stock
Carrying value ($ in millions)	$	—		$	696
Par value (per share)	—			0.01
Liquidation preference (per share)	—			25
Number of shares authorized	—			40,870,560
Number of shares issued and outstanding	—			27,870,560
Dividend/coupon
Prior to May 15, 2016	—		%	8.5		%
On and after May 15, 2016	—		%	Three month LIBOR + 6.243%

Series A Preferred Stock

On April 14, 2016, we issued a Notice of Redemption to the holders of the outstanding Series A Preferred Stock to redeem the remaining 27,870,560 shares at a redemption price of $25 per share, plus approximately $0.53 per share of accrued and unpaid dividends through the redemption date. On May 16, 2016, we redeemed the 27,870,560 outstanding shares of Series A Preferred Stock, with an aggregate liquidation preference of $697 million for $712 million in cash, which included $15 million in accrued and unpaid dividends through the redemption date. Upon redemption of the shares of Series A Preferred Stock, we derecognized the carrying value of $696 million. Effective May 16, 2016, the Series A Preferred Stock was retired.

32

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

17.    Accumulated Other Comprehensive (Loss) Income

The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income.

($ in millions)	Unrealized (losses) gains on investment securities (a)			Translation adjustments and net investment hedges (b)			Cash flow hedges		Defined benefit pension plans			Accumulated other comprehensive (loss) income
Balance at December 31, 2014	$	(21	)	$	36		$	7	$	(88	)	$	(66	)
2015 net change	(35		)	(21		)	—		—			(56		)
Balance at September 30, 2015	$	(56	)	$	15		$	7	$	(88	)	$	(122	)
Balance at December 31, 2015	$	(159	)	$	9		$	8	$	(89	)	$	(231	)
2016 net change	258			5			—		(1		)	262
Balance at September 30, 2016	$	99		$	14		$	8	$	(90	)	$	31

(a) Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

The following tables present the before- and after-tax changes in each component of accumulated other comprehensive (loss) income.

Three months ended September 30, 2016 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	41			$	(4	)		$	37
Less: Net realized gains reclassified to income from continuing operations	52			(a)	(11		)	(b)	41
Net change	(11		)		7				(4		)
Translation adjustments
Net unrealized losses arising during the period	(2		)		1				(1		)
Net investment hedges
Net unrealized gains arising during the period	2				(1		)		1
Other comprehensive loss	$	(11	)		$	7			$	(4	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Three months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	106			$	(41	)		$	65
Less: Net realized gains reclassified to income from continuing operations	6			(a)	(3		)	(b)	3
Net change	100				(38		)		62
Translation adjustments
Net unrealized losses arising during the period	(17		)		5				(12		)
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	(16		)		5				(11		)
Net investment hedges
Net unrealized gains arising during the period	15				(5		)		10
Other comprehensive income	$	99			$	(38	)		$	61

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

33

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, 2016($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	506			$	(133	)		$	373
Less: Net realized gains reclassified to income from continuing operations	145			(a)	(30		)	(b)	115
Net change	361				(103		)		258
Translation adjustments
Net unrealized gains arising during the period	10				(4		)		6
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	11				(4		)		7
Net investment hedges
Net unrealized losses arising during the period	(4		)		2				(2		)
Defined benefit pension plans
Net unrealized losses arising during the period	(1		)		—				(1		)
Other comprehensive income	$	367			$	(105	)		$	262

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Nine months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	53			$	(21	)		$	32
Less: Net realized gains reclassified to income from continuing operations	106			(a)	(39		)	(b)	67
Net change	(53		)		18				(35		)
Translation adjustments
Net unrealized losses arising during the period	(33		)		11				(22		)
Less: Net realized gains reclassified to income from discontinued operations, net of tax	42				(20		)		22
Net change	(75		)		31				(44		)
Net investment hedges
Net unrealized gains arising during the period	31				(11		)		20
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(4		)		1				(3		)
Net change	35				(12		)		23
Other comprehensive loss	$	(93	)		$	37			$	(56	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

34

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

18.    Earnings per Common Share

The following table presents the calculation of basic and diluted earnings per common share.

	Three months ended September 30,						Nine months ended September 30,
($ in millions, except share data) (a)	2016			2015			2016			2015
Net income from continuing operations	$	261		$	273		$	865		$	621
Preferred stock dividends (b)	—			(38		)	(30		)	(1,356		)
Net income (loss) from continuing operations attributable to common shareholders	261			235			835			(735		)
(Loss) income from discontinued operations, net of tax	(52		)	(5		)	(46		)	405
Net income (loss) attributable to common shareholders	$	209		$	230		$	789		$	(330	)
Basic weighted-average common shares outstanding (c)	482,392,811			483,073,329			483,992,930			482,725,342
Diluted weighted-average common shares outstanding (c) (d)	483,575,307			484,399,091			484,762,142			482,725,342
Basic earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.73		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.48		$	1.63		$	(0.68	)
Diluted earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.72		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.47		$	1.63		$	(0.68	)

(a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

(b) Preferred stock dividends for the three months and nine months endedSeptember 30, 2015, include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized.

(c) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months endedSeptember 30, 2016, and 2015, respectively.

(d) Due to the antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months endedSeptember 30, 2015, basic weighted-average common shares outstanding was used to calculate basic and diluted earnings per share.

19.    Regulatory Capital and Other Regulatory Matters

As a BHC, we and our wholly-owned state-chartered banking subsidiary, Ally Bank, are subject to capital requirements issued by U.S. banking regulators that require us to maintain risk-based and leverage capital ratios above minimum levels. A risk-based capital ratio is a ratio of a banking organization’s regulatory capital to its risk-weighted assets. A leverage capital ratio is a ratio of a banking organization’s regulatory capital to a measure of assets or exposures that is not risk-weighted. As of January 1, 2015, Ally and Ally Bank became subject to the rules implementing the 2010 Basel III capital framework in the United States (U.S. Basel III), which reflect new and higher capital requirements, capital buffers, and new regulatory capital definitions, deductions and adjustments. Certain aspects of U.S. Basel III, including the new capital buffers and regulatory capital deductions, will be phased in over several years.

Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary action by regulators that, if undertaken, could have a direct material effect on the Condensed Consolidated Financial Statements or the results of operations and financial condition of Ally and Ally Bank. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we and Ally Bank must meet specific capital guidelines that involve quantitative measures of capital, assets and certain off-balance sheet items. These measures and related classifications, which are used in the calculation of our risk-based and leverage capital ratios and those of Ally Bank, are also subject to qualitative judgments by the regulators about the components of capital, the risk-weightings of assets and other exposures, and other factors. The U.S. banking regulators also use these ratios and guidelines as part of the capital planning and stress testing processes. In addition, in order for Ally to maintain its status as a FHC, Ally and its bank subsidiary, Ally Bank, must remain “well-capitalized” and “well-managed,” as defined under applicable law. Effective January 1, 2015, the “well-capitalized” standard for insured depository institutions, such as Ally Bank, was revised to reflect the new and higher capital requirements under U.S. Basel III.

Under U.S. Basel III, Ally must maintain a minimum Common Equity Tier 1 risk-based capital ratio of4.5%, a minimum Tier 1 risk-based capital ratio of6%, and a minimum Total risk-based capital ratio of8%. In addition to these minimum requirements, Ally is also subject to a Common Equity Tier 1 capital conservation buffer of more than2.5%, subject to a phase-in from January 1, 2016 through December 31, 2018. Failure to maintain the full amount of the buffer will result in restrictions on Ally’s ability to make capital distributions, including dividend payment and stock repurchases and redemptions, and to pay discretionary bonuses to executive officers. In addition to these new risk-based capital standards, U.S. Basel III subjects all U.S. banking organizations, including Ally, to a minimum Tier 1 leverage ratio of 4%, the denominator of which takes into account only on-balance sheet assets.

35

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

In addition to introducing new capital ratios, U.S. Basel III revises the eligibility criteria for regulatory capital instruments and provides for the phase-out of instruments that had previously been recognized as capital but that do not satisfy the new criteria. Subject to certain exceptions (e.g., for certain debt or equity issued to the U.S. government under the Emergency Economic Stabilization Act), trust preferred and other “hybrid” securities are no longer included in a BHC's Tier 1 capital as of January 1, 2016. Also, subject to a phase-in schedule, certain new items are deducted from Common Equity Tier 1 capital, and certain other deductions from regulatory capital have been modified. Among other things, U.S. Basel III requires significant investments in the common shares of unconsolidated financial institutions, mortgage servicing rights, and certain deferred tax assets that exceed specified individual and aggregate thresholds to be deducted from Common Equity Tier 1 capital. U.S. Basel III also revises the standardized approach for calculating risk-weighted assets by, among other things, modifying certain risk weights and introducing new methods for calculating risk-weighted assets for certain types of assets and exposures.

Ally is subject to the U.S. Basel III standardized approach for credit risk. It is not subject to the U.S. Basel III advanced approaches for credit risk. Ally is currently not subject to the U.S. market risk capital rule, which applies only to banking organizations with significant trading assets and liabilities.

On March 7, 2016, Ally Bank received approval from the Federal Reserve to become a state member bank. Ally Bank is now regulated by the FRB through the Federal Reserve Bank of Chicago, as well as the Utah Department of Financial Institutions. In addition, in connection with the application for membership in the Federal Reserve System, Ally Bank made commitments to the FRB relating to capital, liquidity, and business plan requirements. These commitments are consistent with the prior requirements under the now-terminated Capital and Liquidity Maintenance Agreement with the Federal Deposit Insurance Corporation (FDIC), including the requirement to maintain capital at a level such that Ally Bank’s Tier 1 leverage ratio is at least 15%. For this purpose, the leverage ratio is determined in accordance with the FRB's regulations related to capital maintenance. As a requirement of Federal Reserve membership, on March 21, 2016, Ally Bank purchased $435 million of FRB stock.

Compliance with capital requirements is a strategic priority for Ally. We expect to be in compliance with all applicable requirements within the established timeframes.

The following table summarizes our capital ratios under the U.S. Basel III capital framework.

	September 30, 2016				December 31, 2015				Required minimum			Well-capitalized minimum
($ in millions)	Amount		Ratio		Amount		Ratio
Capital ratios
Common Equity Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	12,913	9.53	%	$	12,507	9.21	%	4.50	%		(a)
Ally Bank	17,537		17.21		16,594		17.05		4.50			6.50	%
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	15,087	11.13	%	$	15,077	11.10	%	6.00	%		6.00	%
Ally Bank	17,537		17.21		16,594		17.05		6.00			8.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	17,343	12.80	%	$	17,005	12.52	%	8.00	%		10.00	%
Ally Bank	18,069		17.73		17,043		17.51		8.00			10.00
Tier 1 leverage (to adjusted quarterly average assets) (b)
Ally Financial Inc.	$	15,087	9.73	%	$	15,077	9.73	%	4.00	%		(a)
Ally Bank	17,537		15.45		16,594		15.38		15.00		(c)	5.00	%

(a) Currently, there is no ratio component for determining whether a BHC is "well-capitalized."

(b) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology.

(c) Ally Bank has committed to the FRB to maintain a Tier 1 leverage ratio of at least 15%.

At September 30, 2016, Ally and Ally Bank were “well-capitalized” and met all capital requirements to which each was subject.

Capital Planning and Stress Tests

As a BHC with $50 billion or more of consolidated assets, Ally is required to conduct periodic company-run stress tests, is subject to an annual supervisory stress test conducted by the FRB, and must submit an annual capital plan to the FRB.

Ally’s capital plan must include a description of all planned capital actions over a nine-quarter planning horizon. The capital plan must also include a discussion of how Ally will maintain capital above the minimum regulatory capital ratios under baseline, adverse, and severely adverse economic scenarios, and serve as a source of strength to Ally Bank. The FRB must approve Ally's capital plan before Ally may take any capital action. Even with an approved capital plan, Ally must seek the approval of the FRB before making a capital distribution if, among other factors, Ally would not meet its regulatory capital requirements after making the proposed capital distribution.

36

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

On April 5, 2016, we submitted the results of our semi-annual stress test and our annual capital plan to the FRB. On June 23, 2016, we publicly disclosed summary results of the stress test under the most severe scenario in accordance with regulatory requirements. On June 29, 2016, we received a non-objection to our capital plan from the FRB, including the proposed capital actions contained in our submission. The proposed capital actions include a quarterly cash dividend of $0.08 per share of our common stock, subject to quarterly approval by the Board of Directors, and the ability to repurchase up to $700 million of our common stock from time to time through the second quarter of 2017. In addition, we submitted to the FRB the results of our company-run mid-year stress test conducted under multiple macroeconomic scenarios and disclosed the results of this stress test under the most severe scenario on October 5, 2016, in accordance with regulatory requirements.

On July 18, 2016, the Ally Board of Directors declared a quarterly cash dividend payment of $0.08 per share on all common stock. The dividend was paid on August 15, 2016, to shareholders of record at the close of business on August 1, 2016. On October 18, 2016, the Ally Board of Directors declared a second quarterly cash dividend payment of $0.08 per share on all common stock. Refer to Note 27 to the Condensed Consolidated Financial Statements for further information regarding this common share dividend. Additionally, the Ally Board of Directors authorized a common stock repurchase program of up to $700 million beginning in the third quarter of 2016 and continuing through the second quarter of 2017. During the third quarter of 2016, we repurchased $159 million, or 8,297,653 shares of common stock under this program which reduced total shares outstanding by approximately 1.7%. We had 475,469,882 shares of common stock outstanding at September 30, 2016.

In September 2016, the FRB proposed a rule that would, among other things, revise the capital plan rule to no longer subject large and noncomplex firms, including Ally, to the provisions of the existing rule whereby the FRB may object to a capital plan on the basis of qualitative deficiencies in the firm’s capital planning process. Under the proposed rule, the qualitative assessment of Ally’s capital plan would be conducted outside of the Comprehensive Capital Analysis and Review (CCAR) process, through the supervisory review process, and Ally’s reporting requirements would be modified to reduce certain reporting burdens related to capital planning and stress testing. The proposed rule would take effect for the 2017 capital planning cycle.

20.    Derivative Instruments and Hedging Activities

We enter into interest rate, foreign-currency, and equity swaps, futures, forwards, options, and swaptions in connection with our market risk management activities. Derivative instruments are used to manage interest rate risk relating to specific groups of assets and liabilities, including automotive loan assets and debt. We use foreign exchange contracts to mitigate foreign-currency risk associated with foreign-currency-denominated debt, foreign exchange transactions, and our net investment in foreign subsidiaries. In addition, we also enter into equity option contracts to manage our exposure to the equity markets. Our primary objective for utilizing derivative financial instruments is to manage interest rate risk associated with our fixed- and variable-rate assets and liabilities, foreign exchange risks related to our foreign-currency denominated assets and liabilities, and market risks related to our investment portfolio and certain of our executive share-based compensation plans.

Interest Rate Risk

We monitor our mix of fixed- and variable-rate assets and liabilities. When it is cost-effective to do so, we may enter into interest rate swaps, forwards, futures, options, and swaptions to achieve our desired mix of fixed- and variable-rate assets and liabilities. We execute interest rate swaps, forwards, futures, options, and swaptions to modify our exposure to interest rate risk by converting certain fixed-rate instruments to a variable-rate and certain variable-rate instruments to a fixed-rate. We use a mix of both derivatives that qualify for hedge accounting treatment and economic hedges.

Derivatives qualifying for hedge accounting consist of receive-fixed swaps designated as fair value hedges of specific fixed-rate unsecured debt obligations, receive-fixed swaps designated as fair value hedges of specific fixed-rate FHLB advances and pay-fixed swaps designated as fair value hedges of specific portfolios of fixed-rate held-for-investment retail automotive loan assets. In 2015, we also had pay-fixed swaps designated as cash flow hedges of the expected future cash flows in the form of interest payments on certain outstanding variable-rate borrowings associated with our secured debt.

We also execute economic hedges, which consist of interest rate swaps and interest rate caps held to mitigate interest rate risk associated with our debt portfolio. We also use interest rate swaps to economically hedge our net fixed-versus-variable interest rate exposure. We enter into economic hedges in the form of short-dated, exchange-traded Eurodollar futures to hedge the interest rate exposure of our fixed-rate automotive loans, as well as forwards, options, and swaptions to economically hedge our net fixed-versus-variable interest rate exposure.

Foreign Exchange Risk

We enter into derivative financial instrument contracts to mitigate the risk associated with variability in cash flows related to our various foreign-currency exposures.

We enter into foreign-currency forwards with external counterparties as net investment hedges of foreign exchange exposure on our investments in foreign subsidiaries. Our equity is impacted by the cumulative translation adjustments resulting from the translation of foreign subsidiary results; this impact is reflected in our accumulated other comprehensive (loss) income. We also enter into foreign-currency forwards to economically hedge our foreign-denominated debt, our centralized lending program, and foreign-denominated third party loans. These forward currency forwards that are used as economic hedges are recorded at fair value with changes recorded as income offsetting the gains and losses on the associated foreign-currency transactions.

37

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

We utilized a cross-currency swap to economically hedge foreign exchange exposure on foreign-currency-denominated debt by converting the funding currency to our functional currency. This swap matured during the second quarter of 2015.

Market Risk

We enter into equity options to economically hedge our exposure to the equity markets. We purchase options to assume a long position on certain equities and write options to assume a short position.

We also enter into prepaid equity forward contracts to economically hedge the price risk associated with certain of our executive share-based compensation plans. The prepaid equity forward contracts are hybrid instruments containing an embedded forward contract, which is considered a derivative instrument. The embedded derivative instrument is bifurcated from the host contract and is recorded at fair value with changes in fair value recorded in compensation and benefits expense. The balance of the prepaid component of these equity forward contracts was $17 million as of September 30, 2016, and was recorded within other assets on the Condensed Consolidated Balance Sheet.

Counterparty Credit Risk

Derivative financial instruments contain an element of credit risk if counterparties are unable to meet the terms of the agreements. Credit risk associated with derivative financial instruments is measured as the net replacement cost should the counterparties that owe us under the contract completely fail to perform under the terms of those contracts, assuming no recoveries of underlying collateral as measured by the market value of the derivative financial instrument.

To mitigate the risk of counterparty default, we maintain collateral agreements with certain counterparties. The agreements require both parties to post collateral in the event the fair values of the derivative financial instruments meet posting thresholds established under the agreements. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls.

Certain derivative instruments contain provisions that require us to either post additional collateral or immediately settle any outstanding liability balances upon the occurrence of a specified credit risk-related event. No such specified credit risk related events occurred during the third quarter of 2016.

We placed cash collateral totaling $70 million and securities collateral totaling $49 million at September 30, 2016, and $103 million and $86 million at December 31, 2015, respectively, in accounts maintained by counterparties. This amount primarily relates to collateral posted to support our derivative positions. This amount also excludes cash and securities pledged as collateral under repurchase agreements. At September 30, 2016, and December 31, 2015, we placed cash collateral totaling $7 million and $21 million, respectively, with counterparties under collateral arrangements associated with repurchase agreements. Refer to Note 13 for details on the repurchase agreements. The receivables for cash collateral placed are included in our Condensed Consolidated Balance Sheet in other assets.

We received cash collateral from counterparties totaling $113 million at September 30, 2016, primarily to support these derivative positions. We received cash collateral from counterparties totaling $82 million at December 31, 2015. This amount also excludes cash and securities pledged as collateral under repurchase agreements. Refer to Note 13 for details on the repurchase agreements. The payables for cash collateral received are included on our Condensed Consolidated Balance Sheet in accrued expenses and other liabilities. In certain circumstances, we receive or post securities as collateral with counterparties. We do not record collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met. At September 30, 2016, and December 31, 2015, we received noncash collateral of $2 million and $7 million, respectively. Included in these amounts is noncash collateral where we have been granted the right to sell or pledge the underlying assets. We have not sold or pledged any of the noncash collateral received under these agreements.

38

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Balance Sheet Presentation

The following table summarizes the fair value amounts of derivative instruments reported on our Condensed Consolidated Balance Sheet. The fair value amounts are presented on a gross basis, are segregated by derivatives that are designated and qualifying as hedging instruments or those that are not, and are further segregated by type of contract within those two categories. Notional amounts are reference amounts from which contractual obligations are derived and are not recorded on the balance sheet. In our view, derivative notional is not an accurate measure of our derivative exposure when viewed in isolation from other factors, such as market rate fluctuations and counterparty credit risk.

	September 30, 2016						December 31, 2015
	Derivative contracts in a				Notional amount		Derivative contracts in a				Notional amount
($ in millions)	receivable position (a)		payable position (b)				receivable position (a)		payable position (b)
Derivatives designated as accounting hedges
Interest rate contracts
Swaps (c) (d) (e)	$	114	$	7	$	6,754	$	126	$	9	$	14,151
Foreign exchange contracts
Forwards	—		—		221		—		1		189
Total derivatives designated as accounting hedges	114		7		6,975		126		10		14,340
Derivatives not designated as accounting hedges
Interest rate contracts
Swaps	5		15		864		30		51		6,101
Futures and forwards	—		—		—		2		2		1,905
Written options	—		20		15,206		—		72		18,220
Purchased options	21		—		15,206		73		—		18,240
Total interest rate risk	26		35		31,276		105		125		44,466
Foreign exchange contracts
Futures and forwards	1		—		111		—		—		278
Total foreign exchange risk	1		—		111		—		—		278
Equity contracts
Forwards	—		4		17		—		9		32
Written options	—		—		—		—		1		—
Purchased options	—		—		—		2		—		—
Total equity risk	—		4		17		2		10		32
Total derivatives not designated as accounting hedges	27		39		31,404		107		135		44,776
Total derivatives	$	141	$	46	$	38,379	$	233	$	145	$	59,116

(a) Derivative contracts in a receivable position are classified as other assets on the Condensed Consolidated Balance Sheet, and includes accrued interest of $7 million and $46 million at September 30, 2016, and December 31, 2015, respectively.

(b) Derivative contracts in a liability position are classified as accrued expenses and other liabilities on the Condensed Consolidated Balance Sheet, and includes accrued interest of $1 million and $12 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate unsecured debt obligations with $104 million and $112 million in a receivable position, $0 million and $3 million in a payable position, and a $2.3 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively. The hedge notional amount of $2.3 billion at September 30, 2016, is associated with debt maturing in five or more years.

(d) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate secured debt obligations (FHLB Advances) with $10 million and $1 million in a receivable position, $0 million and $2 million in a payable position, and a $898 million and $500 million notional amount at September 30, 2016, and December 31, 2015, respectively.

(e) Other fair value hedges include pay-fixed swaps on portfolios of held-for-investment automotive loan assets with $0 million and $13 million in a receivable position, $7 million and $3 million in a payable position, and a $3.5 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively.

39

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Statement of Comprehensive Income Presentation

The following table summarizes the location and amounts of gains and losses on derivative instruments reported in our Condensed Consolidated Statement of Comprehensive Income.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Derivatives qualifying for hedge accounting
Gain (loss) recognized in earnings on derivatives
Interest rate contracts
Interest and fees on finance receivables and loans (a)	$	16		$	(34	)	$	(18	)	$	(50	)
Interest on long-term debt (b) (c)	(31		)	132			211			121
(Loss) gain recognized in earnings on hedged items
Interest rate contracts
Interest and fees on finance receivables and loans (d)	(17		)	38			16			73
Interest on long-term debt (e)	32			(135		)	(214		)	(128		)
Total derivatives qualifying for hedge accounting	—			1			(5		)	16
Derivatives not designated as accounting hedges
Loss recognized in earnings on derivatives
Interest rate contracts
Loss on mortgage and automotive loans, net	—			(2		)	—			(2		)
Other income, net of losses	(5		)	—			(2		)	(9		)
Total interest rate contracts	(5		)	(2		)	(2		)	(11		)
Foreign exchange contracts (f)
Interest on long-term debt	—			(1		)	(2		)	(139		)
Other income, net of losses	(1		)	1			(4		)	9
Total foreign exchange contracts	(1		)	—			(6		)	(130		)
Equity contracts
Compensation and benefits expense	2			(4		)	—			(7		)
Total equity contracts	2			(4		)	—			(7		)
Loss recognized in earnings on derivatives	$	(4	)	$	(5	)	$	(13	)	$	(132	)

(a) Amounts exclude losses related to interest for qualifying accounting hedges of retail automotive loans held-for-investment, which are primarily offset by the fixed coupon payments of the loans. The losses were $4 million and $18 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $16 million and $50 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(b) Amounts exclude gains related to interest for qualifying accounting hedges of unsecured debt, which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $7 million and $24 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $34 million and $71 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(c) Amounts exclude gains related to interest for qualifying accounting hedges of secured debt (FHLB Advances), which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $1 million for the three months endedSeptember 30, 2016, and $4 million for the nine months endedSeptember 30, 2016.

(d) Amounts exclude losses related to amortization of deferred loan basis adjustments on the de-designated hedged item of $6 million and $1 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $15 million and $1 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(e) Amounts exclude gains related to amortization of deferred debt basis adjustments on the de-designated hedged item of $23 million and $14 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $62 million and $59 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(f) Amounts exclude gains and losses related to the revaluation of the related foreign-denominated debt or receivable. Gains of $1 million were recognized for the three months endedSeptember 30, 2016, and 2015, and gains of $4 million and $134 million were recognized for the nine months endedSeptember 30, 2016, and 2015, respectively.

40

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following table summarizes derivative instruments used in cash flow and net investment hedge accounting relationships.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016			2015
Foreign exchange contracts
Loss reclassified from accumulated other comprehensive loss to income from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Total loss from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Gain (loss) recognized in other comprehensive income (a)	$	2	$	15	$	(4	)	$	35

(a) The amounts represent the effective portion of net investment hedges. There are offsetting amounts recognized in accumulated other comprehensive income (loss) related to the revaluation of the related net investment in foreign operations, including the tax impacts of the hedge and related net investment, as disclosed separately in Note 17. There were losses of $2 million and $16 million for the three months endedSeptember 30, 2016, and 2015, respectively. There were gains of $9 million and losses of $56 million for the nine months ended September 30, 2016, and 2015, respectively.

21.    Income Taxes

We recognized total income tax expense from continuing operations of $130 million and $336 million for the three months and nine months endedSeptember 30, 2016, compared to income tax expense of $144 million and $341 million for the same periods in 2015. The decrease in income tax expense for the three months ended September 30, 2016, compared to the same period in 2015, was primarily driven by lower pretax earnings. The decrease in income tax expense for the nine months ended September 30, 2016, compared to the same period in 2015, was primarily driven by a tax benefit that resulted from a U.S. tax reserve release related to a prior year federal return that reduced our liability for unrecognized tax benefits. This tax benefit was offset by increases in tax expense attributable to higher pretax earnings and the establishment of a valuation allowance on capital loss carryforwards.

As of each reporting date, we consider existing evidence, both positive and negative, that could impact our view with regard to future realization of deferred tax assets. We continue to believe it is more likely than not that the benefit for capital loss carryforwards, certain foreign tax credits and state net operating loss carryforwards will not be realized. In recognition of this risk, we continue to provide a full valuation allowance on capital loss carryforwards and a partial valuation allowance on the deferred tax assets relating to foreign tax credits and state net operating loss carryforwards.

22.    Fair Value

Fair Value Measurements

For purposes of this disclosure, fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability (exit price) in the principal or most advantageous market in an orderly transaction between market participants at the measurement date under current market conditions. Fair value is based on the assumptions we believe market participants would use when pricing an asset or liability. Additionally, entities are required to consider all aspects of nonperformance risk, including the entity’s own credit standing, when measuring the fair value of a liability.

GAAP specifies a three-level hierarchy that is used when measuring and disclosing fair value. The fair value hierarchy gives the highest priority to quoted prices available in active markets (i.e., observable inputs) and the lowest priority to data lacking transparency (i.e., unobservable inputs). An instrument’s categorization within the fair value hierarchy is based on the lowest level of significant input to its valuation. The following is a description of the three hierarchy levels.

Level 1 Inputs are quoted prices in active markets for identical assets or liabilities at the measurement date. Additionally, the entity must have the ability to access the active market, and the quoted prices cannot be adjusted by the entity.

Level 2 Inputs are other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices in active markets for similar assets or liabilities; quoted prices in inactive markets for identical or similar assets or liabilities; or inputs that are observable or can be corroborated by observable market data by correlation or other means for substantially the full term of the assets or liabilities.

Level 3 Unobservable inputs are supported by little or no market activity. The unobservable inputs represent management's best assumptions of how market participants would price the assets or liabilities. Generally, Level 3 assets and liabilities are valued using pricing models, discounted cash flow methodologies, or similar techniques that require significant judgment or estimation.

Transfers Transfers into or out of any hierarchy level are recognized at the end of the reporting period in which the transfer occurred. There were no transfers between any levels for the nine months endedSeptember 30, 2016.

41

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Following are descriptions of the valuation methodologies used to measure material assets and liabilities at fair value and details of the valuation models, key inputs to those models, and significant assumptions utilized.

• Available-for-sale securities — All classes of available-for-sale securities are carried at fair value based on observable market prices, when available. If observable market prices are not available, our valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate and consider recent market transactions, experience with similar securities, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we are required to utilize various significant assumptions including market observable inputs (e.g., forward interest rates) and internally developed inputs (including prepayment speeds, delinquency levels, and credit losses).

• Interests retained in financial asset sales — Includes certain noncertificated interests retained from the sale of automotive finance receivables. Due to inactivity in the market, valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate; therefore, we classified these assets as Level 3. The valuation considers recent market transactions, experience with similar assets, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we utilize various significant assumptions, including market observable inputs (e.g., forward interest rates) and internally developed inputs (e.g., prepayment speeds, delinquency levels, and credit losses).

• Derivative instruments — We enter into a variety of derivative financial instruments as part of our risk management strategies. Certain of these derivatives are exchange traded, such as Eurodollar futures, options of Eurodollar futures, and equity options. To determine the fair value of these instruments, we utilize the quoted market prices for the particular derivative contracts; therefore, we classified these contracts as Level 1.

We also execute over-the-counter (OTC) and centrally-cleared derivative contracts, such as interest rate swaps, a cross-currency swap, swaptions, foreign-currency denominated forward contracts, prepaid equity forward contracts, caps, floors, and agency to-be-announced securities. For OTC contracts, we utilize third-party-developed valuation models that are widely accepted in the market to value these OTC derivative contracts. The specific terms of the contract and market observable inputs (such as interest rate forward curves, interpolated volatility assumptions, or equity pricing) are used in the model. We classified these OTC derivative contracts as Level 2 because all significant inputs into these models were market observable. For centrally-cleared contracts, we utilize unadjusted prices obtained from the clearing house as the basis for valuation, and they are also classified as Level 2. We did not have any derivative instruments classified as Level 3 as of September 30, 2016, or December 31, 2015.

We are required to consider all aspects of nonperformance risk, including our own credit standing, when measuring fair value of a liability. We reduce credit risk on the majority of our derivatives by entering into legally enforceable agreements that enable the posting and receiving of collateral associated with the fair value of our derivative positions on an ongoing basis. In the event that we do not enter into legally enforceable agreements that enable the posting and receiving of collateral, we will consider our credit risk and the credit risk of our counterparties in the valuation of derivative instruments through a credit valuation adjustment (CVA), if warranted. The CVA calculation utilizes the credit default swap spreads of the counterparty.

42

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Recurring Fair Value

The following tables display the assets and liabilities measured at fair value on a recurring basis including financial instruments elected for the fair value option. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The tables below display the hedges separately from the hedged items; therefore, they do not directly display the impact of our risk management activities.

	Recurring fair value measurements
September 30, 2016($ in millions)	Level 1		Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	321	$	—		$	—	$	321
U.S. States and political subdivisions	—		763			—		763
Foreign government	11		169			—		180
Mortgage-backed residential	—		12,143			—		12,143
Mortgage-backed commercial	—		524			—		524
Asset-backed	—		1,570			—		1,570
Corporate debt	—		1,630			—		1,630
Total debt securities	332		16,799			—		17,131
Equity securities (a)	570		—			—		570
Total available-for-sale securities	902		16,799			—		17,701
Other assets
Interests retained in financial asset sales	—		—			32		32
Derivative contracts in a receivable position (b)
Interest rate	—		140			—		140
Foreign currency	—		1			—		1
Total derivative contracts in a receivable position	—		141			—		141
Total assets	$	902	$	16,940		$	32	$	17,874
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	—	$	(42	)	$	—	$	(42	)
Other	—		(4		)	—		(4		)
Total derivative contracts in a payable position	—		(46		)	—		(46		)
Total liabilities	$	—	$	(46	)	$	—	$	(46	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

43

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

	Recurring fair value measurements
December 31, 2015 ($ in millions)	Level 1			Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	1,469		$	272		$	—	$	1,741
U.S. States and political subdivisions	—			716			—		716
Foreign government	10			167			—		177
Mortgage-backed residential	—			10,366			—		10,366
Mortgage-backed commercial	—			481			—		481
Asset-backed	—			1,755			—		1,755
Corporate debt	—			1,204			—		1,204
Total debt securities	1,479			14,961			—		16,440
Equity securities (a)	717			—			—		717
Total available-for-sale securities	2,196			14,961			—		17,157
Other assets
Interests retained in financial asset sales	—			—			40		40
Derivative contracts in a receivable position (b)
Interest rate	2			229			—		231
Other	2			—			—		2
Total derivative contracts in a receivable position	4			229			—		233
Total assets	$	2,200		$	15,190		$	40	$	17,430
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	(2	)	$	(133	)	$	—	$	(135	)
Foreign currency	—			(1		)	—		(1		)
Other	(1		)	(8		)	—		(9		)
Total derivative contracts in a payable position	(3		)	(142		)	—		(145		)
Total liabilities	$	(3	)	$	(142	)	$	—	$	(145	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

44

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following tables present the reconciliation for all Level 3 assets and liabilities measured at fair value on a recurring basis. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The Level 3 items presented below may be hedged by derivatives and other financial instruments that are classified as Level 1 or Level 2. Thus, the following tables do not fully reflect the impact of our risk management activities.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at July 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	31	$	1	(a)	$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—
Total assets	$	31	$	1		$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at July 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	4	$	—	(a)	$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	32		1		(a)	—		—		—			1		(5		)	29		—
Total assets	$	36	$	1		$	—	$	—	$	(4	)	$	1	$	(5	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at Jan. 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	40	$	4	(a)	$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—
Total assets	$	40	$	4		$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at Jan. 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	3	$	1		$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	47		8		(a)	—		—		—			2		(28		)	29		—
Total assets	$	50	$	9		$	—	$	—	$	(4	)	$	2	$	(28	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

Nonrecurring Fair Value

We may be required to measure certain assets and liabilities at fair value from time to time. These periodic fair value measures typically result from the application of lower-of-cost or fair value accounting or certain impairment measures. These items would constitute nonrecurring fair value measures.

45

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The following tables display the assets and liabilities measured at fair value on a nonrecurring basis.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2016($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net	$	—	$	—	$	56	$	56	$	—		n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		30		30		(7		)	n/m	(a)	n/m	(a)
Other	—		—		45		45		(17		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		75		75		(24		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		15		15		(4		)	n/m	(a)	n/m	(a)
Other	—		—		7		7		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	153	$	153	$	(28	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2016. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2015 ($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net
Other	$	—	—		37		37		—			n/m	(a)	n/m	(a)
Total loans held-for-sale, net	—		—		37		37		—			n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		13		13		(4		)	n/m	(a)	n/m	(a)
Other	—		—		30		30		(15		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		43		43		(19		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		9		9		(3		)	n/m	(a)	n/m	(a)
Other	—		—		2		2		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	91	$	91	$	(22	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2015. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

46

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Fair Value Option for Financial Assets

We elected the fair value option for an insignificant amount of conforming and government-insured mortgage loans held-for-sale. We elected the fair value option to mitigate earnings volatility by better matching the accounting for the assets with the related hedges. Our intent in electing fair value measurement was to mitigate a divergence between accounting losses and economic exposure for certain assets and liabilities.

Fair Value of Financial Instruments

The following table presents the carrying and estimated fair value of financial instruments, except for those recorded at fair value on a recurring basis presented in the previous section of this note titled Recurring Fair Value. When possible, we use quoted market prices to determine fair value. Where quoted market prices are not available, the fair value is internally derived based on appropriate valuation methodologies with respect to the amount and timing of future cash flows and estimated discount rates. However, considerable judgment is required in interpreting current market data to develop the market assumptions and inputs necessary to estimate fair value. As such, the actual amount received to sell an asset or the amount paid to settle a liability could differ from our estimates. Fair value information presented herein was based on information available at September 30, 2016, and December 31, 2015.

			Estimated fair value
($ in millions)	Carrying value		Level 1		Level 2		Level 3		Total
September 30, 2016
Financial assets
Held-to-maturity securities	$	649	$	—	$	658	$	—	$	658
Loans held-for-sale, net	56		—		—		56		56
Finance receivables and loans, net	113,825		—		—		114,847		114,847
Nonmarketable equity investments	818		—		787		50		837
Financial liabilities
Deposit liabilities	$	75,744	$	—	$	—	$	76,231	$	76,231
Short-term borrowings	6,434		—		—		6,435		6,435
Long-term debt	56,836		—		22,405		36,790		59,195
December 31, 2015
Financial assets
Loans held-for-sale, net	$	105	$	—	$	—	$	105	$	105
Finance receivables and loans, net	110,546		—		—		110,737		110,737
Nonmarketable equity investments	418		—		391		42		433
Financial liabilities
Deposit liabilities	$	66,478	$	—	$	—	$	66,889	$	66,889
Short-term borrowings	8,101		—		—		8,102		8,102
Long-term debt	66,234		—		23,018		45,157		68,175

The following describes the methodologies and assumptions used to determine fair value for the significant classes of financial instruments. In addition to the valuation methods discussed below, we also followed guidelines for determining whether a market was not active and a transaction was not distressed. We assumed the price that would be received in an orderly transaction (including a market-based return) and not in forced liquidation or distressed sale.

• Cash and cash equivalents — Included in cash and cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and which are subject to an insignificant risk of change in value due to interest rate, quoted price, or penalty on withdrawal. Classified as Level 1 under the fair value hierarchy, cash and cash equivalents generally expose us to limited credit risk and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates. Accordingly, the carrying value approximates the fair value of these instruments.

• Held-to-maturity securities — Held-to-maturity securities, which consist of residential mortgage-backed debt securities issued by government agencies, are carried at amortized cost. For fair value disclosure purposes, held-to-maturity securities are classified as Level 2, with fair value based on observable market prices, when available.

• Finance receivables and loans, net — With the exception of mortgage loans held-for-investment, the fair value of finance receivables and loans was based on discounted future cash flows using applicable spreads to approximate current rates applicable to each category of finance receivables and loans (an income approach using Level 3 inputs). The carrying value of commercial receivables in certain markets and certain automotive and other receivables for which interest rates reset on a short-term basis with

47

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

applicable market indices are assumed to approximate fair value either because of the short-term nature or because of the interest rate adjustment feature. The fair value of commercial receivables in other markets was based on discounted future cash flows using applicable spreads to approximate current rates applicable to similar assets in those markets.

The fair value of mortgage loans held-for-investment was based on a discounted cash flow basis utilizing cash flow projections from internally developed models that utilized prepayment, default, and discount rate assumptions. These valuations consider unique attributes of the loans such as geography, delinquency status, product type, and other factors.

• Nonmarketable equity investments — Nonmarketable equity investments primarily include investments in FHLB and FRB stock and other equity investments carried at cost. As a member of the FHLB and FRB, Ally Bank is required to hold FHLB and FRB stock. The stock can be sold only to the FHLB and FRB upon termination of membership, or redeemed at the sole discretion of the FHLB and FRB, respectively. The fair value of FHLB and FRB stock is equal to the stock’s par value since the stock is bought, sold, and/or redeemed at par. FHLB and FRB stock is carried at cost, which generally represents the stock’s par value.

• Deposit liabilities — Deposit liabilities represent certain consumer and brokered bank deposits, mortgage escrow deposits, and dealer deposits. The fair value of deposits at Level 3 were estimated by discounting projected cash flows based on discount factors derived from the forward interest rate swap curve.

• Short-term borrowings and Long-term debt — Level 2 debt was valued using quoted market prices for similar instruments, when available, or other means for substantiation with observable inputs. Debt valued by discounting projected cash flows using internally derived inputs, such as prepayment speeds and discount rates, was classified as Level 3.

• Financial instruments for which carrying value approximates fair value — Certain financial instruments that are not carried at fair value on the consolidated balance sheet are carried at amounts that approximate fair value primarily due to their short term nature and limited credit risk. These instruments include restricted cash, cash collateral, accrued interest receivable, accrued interest payable, trade receivables and payables, and other short term receivables and payables.

23.    Offsetting Assets and Liabilities

Our derivative contracts and repurchase/reverse repurchase transactions are supported by qualifying master netting and master repurchase agreements. These agreements are legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the agreement to the nondefaulting entity upon an event of default of the counterparty, including bankruptcy, insolvency, or similar proceeding, and (2) provide the nondefaulting entity the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to liquidate or set off collateral promptly upon an event of default of the counterparty.

To further mitigate the risk of counterparty default related to derivative instruments, we maintain collateral agreements with certain counterparties. The agreements require both parties to maintain collateral in the event the fair values of the derivative financial instruments meet established thresholds. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls, such that the net replacement cost of the nondefaulting party is covered in the event of counterparty default.

In certain instances as it relates to our derivative instruments, we have the option to report derivative assets and liabilities as well as assets and liabilities associated with cash collateral received or delivered that is governed by a master netting agreement on a net basis as long as certain qualifying criteria are met. Similarly, for our repurchase/reverse repurchase transactions, we have the option to report recognized assets and liabilities subject to a master netting agreement on a net basis if certain qualifying criteria are met. At September 30, 2016, these instruments are reported as gross assets and gross liabilities on the Condensed Consolidated Balance Sheet.

48

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
September 30, 2016($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	140		$	—	$	140		$	(15	)	$	(104	)	$	21
Derivative assets in net liability positions	1			—		1			(1		)	—			—
Total assets (d)	$	141		$	—	$	141		$	(16	)	$	(104	)	$	21
Liabilities
Derivative liabilities in net liability positions	$	(28	)	$	—	$	(28	)	$	—		$	7		$	(21	)
Derivative liabilities in net asset positions	(15		)	—		(15		)	15			—			—
Derivative liabilities with no offsetting arrangements	(3		)	—		(3		)	—			—			(3		)
Total derivative liabilities (d)	(46		)	—		(46		)	15			7			(24		)
Securities sold under agreements to repurchase (e)	(659		)	—		(659		)	—			659			—
Total liabilities	$	(705	)	$	—	$	(705	)	$	15		$	666		$	(24	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $2 million of noncash derivative collateral pledged to us was excluded at September 30, 2016. We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $2 million at September 30, 2016. We have not sold or pledged any of the noncash collateral received under these agreements as of September 30, 2016.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

49

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
December 31, 2015 ($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	224		$	—	$	224		$	(69	)	$	(67	)	$	88
Derivative assets in net liability positions	9			—		9			(9		)	—			—
Total assets (d)	$	233		$	—	$	233		$	(78	)	$	(67	)	$	88
Liabilities
Derivative liabilities in net liability positions	$	(68	)	$	—	$	(68	)	$	9		$	2		$	(57	)
Derivative liabilities in net asset positions	(69		)	—		(69		)	69			—			—
Derivative liabilities with no offsetting arrangements	(8		)	—		(8		)	—			—			(8		)
Total derivative liabilities (d)	(145		)	—		(145		)	78			2			(65		)
Securities sold under agreements to repurchase (e)	(648		)	—		(648		)	—			648			—
Total liabilities	$	(793	)	$	—	$	(793	)	$	78		$	650		$	(65	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $7 million of noncash derivative collateral pledged to us was excluded at December 31, 2015. We do not record such collateral received on our Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $7 million at December 31, 2015. We have not sold or pledged any of the noncash collateral received under these agreements as of December 31, 2015.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

24.    Segment and Geographic Information

Operating segments are defined as components of an enterprise that engage in business activity from which revenues are earned and expenses incurred for which discrete financial information is available that is evaluated regularly by our chief operating decision maker in deciding how to allocate resources and in assessing performance.

Change in Reportable Segments

As a result of a change in how management views and operates our business, during the first quarter of 2016, we made changes in the composition of our operating segments. Financial information related to our Corporate Finance business is presented as a separate reportable segment. Previously, all such activity was included in Corporate and Other. Additionally, only the activity of our ongoing bulk acquisitions of mortgage loans and other originations and refinancing is presented in Mortgage Finance operations. The activity related to the management of our legacy mortgage portfolio is included in Corporate and Other. Our other operating segments, Automotive Finance operations and Insurance operations, were unchanged. Amounts for 2015 have been adjusted to conform to the current management view.

We report our results of operations on a line-of-business basis through four operating segments: Automotive Finance operations, Insurance operations, Mortgage Finance operations, and Corporate Finance operations, with the remaining activity reported in Corporate and Other. The operating segments are determined based on the products and services offered, and reflect the manner in which financial information is currently evaluated by management. The following is a description of each of our reportable operating segments.

Automotive Finance operations— Provides automotive financing services to consumers and automotive dealers. Our automotive financing services include providing retail installment sales financing, loans, and leases; offering term loans to dealers, financing dealer floorplans and other lines of credit to dealers; fleet financing, and vehicle remarketing services.

Insurance operations — Offers both consumer finance protection and insurance products sold primarily through the automotive dealer channel, and commercial insurance products sold to dealers. As part of our focus on offering dealers a broad range of consumer financial and insurance products, we provide vehicle service contracts, maintenance coverage, and guaranteed asset protection products. We also underwrite selected commercial insurance coverages, which primarily insure dealers' vehicle inventories.

50

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Mortgage Finance operations — Includes the management of a held-for-investment consumer mortgage finance loan portfolio and is primarily comprised of high-quality jumbo and low-to-moderate income mortgage loans purchased or originated after January 1, 2009.

Corporate Finance operations — Primarily provides senior secured leveraged cash flow and asset-based loans to mostly U.S.-based middle market companies. The loans are used to support leveraged buyouts, mergers and acquisitions, debt refinancing, restructurings, and working capital.

Corporate and Other primarily consists of activity related to centralized corporate treasury activities such as management of the cash and corporate investment securities and loan portfolios, short- and long-term debt, retail and brokered deposit liabilities, derivative instruments, the amortization of the discount associated with new debt issuances and bond exchanges, and the residual impacts of our corporate funds-transfer pricing (FTP) and treasury asset liability management (ALM) activities. Corporate and Other also includes certain equity investments, the management of our legacy mortgage portfolio, and reclassifications and eliminations between the reportable operating segments. Additionally, beginning in June 2016, financial information related to TradeKing is included within Corporate and Other.

We utilize an FTP methodology for the majority of our business operations. The FTP methodology assigns charge rates and credit rates to classes of assets and liabilities based on expected duration and the benchmark rate curve plus an assumed credit spread. Matching duration allocates interest income and interest expense to these reportable segments so their respective results are insulated from interest rate risk. This methodology is consistent with our ALM practices, which includes managing interest rate risk centrally at a corporate level. The net residual impact of the FTP methodology is included within the results of Corporate and Other.

The information presented in our reportable operating segments and geographic areas tables that follow are based in part on internal allocations, which involve management judgment.

Financial information for our reportable operating segments is summarized as follows.

Three months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	933	$	14	$	25	$	30	$	(6	)	$	996
Other revenue	74		264		—		4		46			388
Total net revenue	1,007		278		25		34		40			1,384
Provision for loan losses	270		—		1		3		(16		)	258
Total noninterest expense	418		222		16		16		63			735
Income (loss) from continuing operations before income tax expense	$	319	$	56	$	8	$	15	$	(7	)	$	391
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	870	$	16	$	17	$	22	$	45		$	970
Other revenue	63		233		—		10		26			332
Total net revenue	933		249		17		32		71			1,302
Provision for loan losses	201		—		3		4		3			211
Total noninterest expense	409		209		10		14		32			674
Income from continuing operations before income tax expense	$	323	$	40	$	4	$	14	$	36		$	417
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $738 million and $759 million for the three months endedSeptember 30, 2016, and 2015, respectively.

51

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	2,758	$	44	$	71	$	87	$	(29	)	$	2,931
Other revenue	228		777		—		14		119			1,138
Total net revenue	2,986		821		71		101		90			4,069
Provision for loan losses	649		—		4		12		(15		)	650
Total noninterest expense	1,255		733		48		49		133			2,218
Income (loss) from continuing operations before income tax expense	$	1,082	$	88	$	19	$	40	$	(28	)	$	1,201
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	2,529	$	42	$	39	$	64	$	62		$	2,736
Other revenue (loss)	170		769		—		22		(175		)	786
Total net revenue (loss)	2,699		811		39		86		(113		)	3,522
Provision for loan losses	460		—		9		3		(5		)	467
Total noninterest expense	1,237		678		28		42		108			2,093
Income (loss) from continuing operations before income tax expense	$	1,002	$	133	$	2	$	41	$	(216	)	$	962
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $2,281 million and $2,269 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

Information concerning principal geographic areas was as follows.

Three months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss)
2016
Canada	$	22	$	10	$	9
Europe	—		—		(1		)
Latin America	—		—		(1		)
Total foreign (b)	22		10		7
Total domestic (c)	1,362		381		202
Total	$	1,384	$	391	$	209
2015
Canada	$	24	$	11	$	9
Europe	—		1		—
Total foreign (b)	24		12		9
Total domestic (c)	1,278		405		259
Total	$	1,302	$	417	$	268

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(c) Amounts include eliminations between our domestic and foreign operations.

52

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss) (b)
2016
Canada	$	67	$	32	$	27
Europe	—		—		(4		)
Latin America	—		—		(1		)
Total foreign (c)	67		32		22
Total domestic (d)	4,002		1,169		797
Total	$	4,069	$	1,201	$	819
2015
Canada	$	76	$	35	$	30
Europe	1		5		28
Asia-Pacific	—		—		452
Total foreign (c)	77		40		510
Total domestic (d)	3,445		922		516
Total	$	3,522	$	962	$	1,026

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated.

(c) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(d) Amounts include eliminations between our domestic and foreign operations.

25.    Parent and Guarantor Condensed Consolidating Financial Statements

Certain of our senior notes issued by the parent are guaranteed by 100% directly owned subsidiaries of Ally (the Guarantors). As of September 30, 2016, the Guarantors include Ally US LLC and IB Finance Holding Company, LLC (IB Finance), each of which fully and unconditionally guarantee the senior notes on a joint and several basis.

The following financial statements present condensed consolidating financial data for (i) Ally Financial Inc. (on a parent company-only basis); (ii) the Guarantors; (iii) the nonguarantor subsidiaries (all other subsidiaries); and (iv) an elimination column for adjustments to arrive at (v) the information for the parent company, the Guarantors, and nonguarantors on a consolidated basis.

Investments in subsidiaries are accounted for by the parent company and the Guarantors using the equity-method for this presentation. Results of operations of subsidiaries are therefore classified in the parent company’s and Guarantors’ investment in subsidiaries accounts. The elimination entries set forth in the following condensed consolidating financial statements eliminate distributed and undistributed income of subsidiaries, investments in subsidiaries, and intercompany balances and transactions between the parent, the Guarantors, and nonguarantors.

53

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Condensed Consolidating Statements of Comprehensive Income

Three months ended September 30, 2016 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(15	)	$	—		$	1,322		$	—		$	1,307
Interest and fees on finance receivables and loans — intercompany	2			—			2			(4		)	—
Interest and dividends on investment securities	—			—			102			(1		)	101
Interest on cash and cash equivalents	1			—			2			—			3
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	4			—			645			—			649
Total financing revenue and other interest income	(8		)	—			2,075			(7		)	2,060
Interest expense
Interest on deposits	2			—			210			—			212
Interest on short-term borrowings	10			—			4			—			14
Interest on long-term debt	289			—			141			—			430
Interest on intercompany debt	5			—			2			(7		)	—
Total interest expense	306			—			357			(7		)	656
Depreciation expense on operating lease assets	3			—			405			—			408
Net financing (loss) revenue	(317		)	—			1,313			—			996
Cash dividends from subsidiaries
Nonbank subsidiaries	170			—			—			(170		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			238			—			238
(Loss) gain on mortgage and automotive loans, net	(7		)	—			7			—			—
Other gain on investments, net	—			—			52			—			52
Other income, net of losses	298			—			231			(431		)	98
Total other revenue	291			—			528			(431		)	388
Total net revenue	144			—			1,841			(601		)	1,384
Provision for loan losses	147			—			111			—			258
Noninterest expense
Compensation and benefits expense	143			—			105			—			248
Insurance losses and loss adjustment expenses	—			—			69			—			69
Other operating expenses	307			—			541			(430		)	418
Total noninterest expense	450			—			715			(430		)	735
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	(453		)	—			1,015			(171		)	391
Income tax (benefit) expense from continuing operations	(88		)	—			218			—			130
Net (loss) income from continuing operations	(365		)	—			797			(171		)	261
Loss from discontinued operations, net of tax	(47		)	—			(5		)	—			(52		)
Undistributed income of subsidiaries
Bank subsidiary	325			325			—			(650		)	—
Nonbank subsidiaries	296			—			—			(296		)	—
Net income	209			325			792			(1,117		)	209
Other comprehensive loss, net of tax	(4		)	(3		)	(9		)	12			(4		)
Comprehensive income	$	205		$	322		$	783		$	(1,105	)	$	205

54

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Three months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(33	)	$	—		$	1,199		$	—		$	1,166
Interest and fees on finance receivables and loans — intercompany	3			—			1			(4		)	—
Interest on loans held-for-sale	—			—			2			—			2
Interest and dividends on investment securities	—			—			102			—			102
Interest on cash and cash equivalents	—			—			2			—			2
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	1			—			829			—			830
Total financing revenue and other interest income	(29		)	—			2,137			(6		)	2,102
Interest expense
Interest on deposits	3			—			178			—			181
Interest on short-term borrowings	10			—			3			—			13
Interest on long-term debt	272			—			138			—			410
Interest on intercompany debt	3			—			3			(6		)	—
Total interest expense	288			—			322			(6		)	604
Depreciation expense on operating lease assets	1			—			527			—			528
Net financing (loss) revenue	(318		)	—			1,288			—			970
Cash dividends from subsidiaries
Nonbank subsidiaries	494			—			—			(494		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			236			—			236
Loss on mortgage and automotive loans, net	(1		)	—			(1		)	—			(2		)
Other gain on investments, net	—			—			6			—			6
Other income, net of losses	367			—			329			(604		)	92
Total other revenue	366			—			570			(604		)	332
Total net revenue	542			—			1,858			(1,098		)	1,302
Provision for loan losses	48			—			163			—			211
Noninterest expense
Compensation and benefits expense	138			—			212			(115		)	235
Insurance losses and loss adjustment expenses	—			—			61			—			61
Other operating expenses	315			—			552			(489		)	378
Total noninterest expense	453			—			825			(604		)	674
Income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	41			—			870			(494		)	417
Income tax (benefit) expense from continuing operations	(30		)	—			174			—			144
Net income from continuing operations	71			—			696			(494		)	273
Loss from discontinued operations, net of tax	(5		)	—			—			—			(5		)
Undistributed income (loss) income of subsidiaries
Bank subsidiary	254			254			—			(508		)	—
Nonbank subsidiaries	(52		)	(1		)	—			53			—
Net income	268			253			696			(949		)	268
Other comprehensive income, net of tax	61			65			55			(120		)	61
Comprehensive income	$	329		$	318		$	751		$	(1,069	)	$	329

55

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(82	)	$	—		$	3,889		$	—		$	3,807
Interest and fees on finance receivables and loans — intercompany	8			—			6			(14		)	—
Interest and dividends on investment securities	—			—			303			(1		)	302
Interest on cash and cash equivalents	4			—			6			—			10
Interest-bearing cash — intercompany	—			—			7			(7		)	—
Operating leases	14			—			2,105			—			2,119
Total financing revenue and other interest income	(56		)	—			6,316			(22		)	6,238
Interest expense
Interest on deposits	6			—			602			—			608
Interest on short-term borrowings	31			—			8			—			39
Interest on long-term debt	868			—			440			—			1,308
Interest on intercompany debt	14			—			8			(22		)	—
Total interest expense	919			—			1,058			(22		)	1,955
Depreciation expense on operating lease assets	11			—			1,341			—			1,352
Net financing (loss) revenue	(986		)	—			3,917			—			2,931
Cash dividends from subsidiaries
Nonbank subsidiaries	800			—			—			(800		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			704			—			704
(Loss) gain on mortgage and automotive loans, net	(11		)	—			15			—			4
Loss on extinguishment of debt	(2		)	—			(2		)	—			(4		)
Other gain on investments, net	—			—			145			—			145
Other income, net of losses	989			—			661			(1,361		)	289
Total other revenue	976			—			1,523			(1,361		)	1,138
Total net revenue	790			—			5,440			(2,161		)	4,069
Provision for loan losses	295			—			355			—			650
Noninterest expense
Compensation and benefits expense	430			—			312			—			742
Insurance losses and loss adjustment expenses	—			—			287			—			287
Other operating expenses	963			—			1,586			(1,360		)	1,189
Total noninterest expense	1,393			—			2,185			(1,360		)	2,218
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(898		)	—			2,900			(801		)	1,201
Income tax (benefit) expense from continuing operations	(196		)	(82		)	614			—			336
Net (loss) income from continuing operations	(702		)	82			2,286			(801		)	865
Loss from discontinued operations, net of tax	(39		)	—			(7		)	—			(46		)
Undistributed income (loss) of subsidiaries
Bank subsidiary	932			932			—			(1,864		)	—
Nonbank subsidiaries	628			(2		)	—			(626		)	—
Net income	819			1,012			2,279			(3,291		)	819
Other comprehensive income, net of tax	262			143			234			(377		)	262
Comprehensive income	$	1,081		$	1,155		$	2,513		$	(3,668	)	$	1,081

56

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(45	)	$	—		$	3,403		$	—		$	3,358
Interest and fees on finance receivables and loans — intercompany	15			—			22			(37		)	—
Interest on loans held-for-sale	—			—			40			—			40
Interest and dividends on investment securities	—			—			283			—			283
Interest on cash and cash equivalents	1			—			5			—			6
Interest-bearing cash — intercompany	—			—			6			(6		)	—
Operating leases	1			—			2,585			—			2,586
Total financing revenue and other interest income	(28		)	—			6,344			(43		)	6,273
Interest expense
Interest on deposits	8			—			522			—			530
Interest on short-term borrowings	30			—			6			—			36
Interest on long-term debt	856			—			402			—			1,258
Interest on intercompany debt	28			—			15			(43		)	—
Total interest expense	922			—			945			(43		)	1,824
Depreciation expense on operating lease assets	1			—			1,712			—			1,713
Net financing (loss) revenue	(951		)	—			3,687			—			2,736
Cash dividends from subsidiaries
Bank subsidiaries	525			525			—			(1,050		)	—
Nonbank subsidiaries	980			—			—			(980		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			706			—			706
(Loss) gain on mortgage and automotive loans, net	(9		)	—			54			—			45
Loss on extinguishment of debt	(353		)	—			(1		)	—			(354		)
Other gain on investments, net	—			—			106			—			106
Other income, net of losses	1,045			—			1,019			(1,781		)	283
Total other revenue	683			—			1,884			(1,781		)	786
Total net revenue	1,237			525			5,571			(3,811		)	3,522
Provision for loan losses	111			—			356			—			467
Noninterest expense
Compensation and benefits expense	431			—			634			(339		)	726
Insurance losses and loss adjustment expenses	—			—			239			—			239
Other operating expenses	935			—			1,635			(1,442		)	1,128
Total noninterest expense	1,366			—			2,508			(1,781		)	2,093
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(240		)	525			2,707			(2,030		)	962
Income tax (benefit) expense from continuing operations	(231		)	—			572			—			341
Net (loss) income from continuing operations	(9		)	525			2,135			(2,030		)	621
Income from discontinued operations, net of tax	367			—			38			—			405
Undistributed income (loss) of subsidiaries
Bank subsidiary	302			302			—			(604		)	—
Nonbank subsidiaries	366			(1		)	—			(365		)	—
Net income	1,026			826			2,173			(2,999		)	1,026
Other comprehensive (loss) income, net of tax	(56		)	40			(64		)	24			(56		)
Comprehensive income	$	970		$	866		$	2,109		$	(2,975	)	$	970

57

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Condensed Consolidating Balance Sheet

September 30, 2016($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	809		$	—	$	970		$	—		$	1,779
Interest-bearing	600			—		1,910			—			2,510
Interest-bearing — intercompany	—			—		779			(779		)	—
Total cash and cash equivalents	1,409			—		3,659			(779		)	4,289
Available-for-sale securities	—			—		18,030			(329		)	17,701
Held-to-maturity securities	—			—		649			—			649
Loans held-for-sale, net	—			—		56			—			56
Finance receivables and loans, net
Finance receivables and loans, net	5,501			—		109,458			—			114,959
Intercompany loans to
Bank subsidiary	300			—		—			(300		)	—
Nonbank subsidiaries	1,693			—		600			(2,293		)	—
Allowance for loan losses	(125		)	—		(1,009		)	—			(1,134		)
Total finance receivables and loans, net	7,369			—		109,049			(2,593		)	113,825
Investment in operating leases, net	50			—		12,639			—			12,689
Intercompany receivables from
Bank subsidiary	343			—		—			(343		)	—
Nonbank subsidiaries	90			—		127			(217		)	—
Investment in subsidiaries
Bank subsidiary	17,582			17,582		—			(35,164		)	—
Nonbank subsidiaries	11,378			1		—			(11,379		)	—
Premiums receivable and other insurance assets	—			—		1,906			(25		)	1,881
Other assets	4,434			—		4,681			(2,808		)	6,307
Total assets	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	101		$	—		$	101
Interest-bearing	193			—		75,450			—			75,643
Total deposit liabilities	193			—		75,551			—			75,744
Short-term borrowings	3,525			—		2,909			—			6,434
Long-term debt	22,264			—		34,572			—			56,836
Intercompany debt to
Bank subsidiary	330			—		—			(330		)	—
Nonbank subsidiaries	1,379			—		1,993			(3,372		)	—
Intercompany payables to
Bank subsidiary	436			—		—			(436		)	—
Nonbank subsidiaries	179			—		(29		)	(150		)	—
Interest payable	247			—		215			—			462
Unearned insurance premiums and service revenue	—			—		2,493			—			2,493
Accrued expenses and other liabilities	472			—		4,133			(2,807		)	1,798
Total liabilities	29,025			—		121,837			(7,095		)	143,767
Total equity	13,630			17,583		28,959			(46,542		)	13,630
Total liabilities and equity	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

58

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

December 31, 2015 ($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	1,234		$	—	$	914		$	—		$	2,148
Interest-bearing	401			—		3,831			—			4,232
Interest-bearing — intercompany	—			—		850			(850		)	—
Total cash and cash equivalents	1,635			—		5,595			(850		)	6,380
Available-for-sale securities	—			—		17,157			—			17,157
Loans held-for-sale, net	—			—		105			—			105
Finance receivables and loans, net
Finance receivables and loans, net	2,636			—		108,964			—			111,600
Intercompany loans to
Bank subsidiary	600			—		—			(600		)	—
Nonbank subsidiaries	3,277			—		559			(3,836		)	—
Allowance for loan losses	(72		)	—		(982		)	—			(1,054		)
Total finance receivables and loans, net	6,441			—		108,541			(4,436		)	110,546
Investment in operating leases, net	81			—		16,190			—			16,271
Intercompany receivables from
Bank subsidiary	186			—		—			(186		)	—
Nonbank subsidiaries	259			—		282			(541		)	—
Investment in subsidiaries
Bank subsidiary	16,496			16,496		—			(32,992		)	—
Nonbank subsidiaries	10,902			11		—			(10,913		)	—
Premiums receivable and other insurance assets	—			—		1,827			(26		)	1,801
Other assets	4,785			—		4,488			(2,952		)	6,321
Total assets	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	89		$	—		$	89
Interest-bearing	229			—		66,160			—			66,389
Total deposit liabilities	229			—		66,249			—			66,478
Short-term borrowings	3,453			—		4,648			—			8,101
Long-term debt	21,048			—		45,186			—			66,234
Intercompany debt to
Nonbank subsidiaries	1,409			—		3,877			(5,286		)	—
Intercompany payables to
Bank subsidiary	142			—		—			(142		)	—
Nonbank subsidiaries	420			—		191			(611		)	—
Interest payable	258			—		92			—			350
Unearned insurance premiums and service revenue	—			—		2,434			—			2,434
Accrued expenses and other liabilities	387			82		4,028			(2,952		)	1,545
Total liabilities	27,346			82		126,705			(8,991		)	145,142
Total equity	13,439			16,425		27,480			(43,905		)	13,439
Total liabilities and equity	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

59

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Condensed Consolidating Statement of Cash Flows

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	709		$	—		$	3,782		$	(902	)	$	3,589
Investing activities
Purchases of available-for-sale securities	—			—			(11,027		)	—			(11,027		)
Proceeds from sales of available-for-sale securities	—			—			8,546			—			8,546
Proceeds from maturities and repayments of available-for-sale securities	—			—			2,411			—			2,411
Purchases of held-to-maturity securities	—			—			(650		)	—			(650		)
Net decrease (increase) in finance receivables and loans	934			—			(9,242		)	—			(8,308		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			4,221			—			4,221
Net change in loans — intercompany	1,788			—			(41		)	(1,747		)	—
Purchases of operating lease assets	—			—			(2,360		)	—			(2,360		)
Disposals of operating lease assets	16			—			4,615			—			4,631
Acquisitions, net of cash acquired	(309		)	—			—			—			(309		)
Capital contributions to subsidiaries	(3,112		)	—			—			3,112			—
Returns of contributed capital	2,168			8			—			(2,176		)	—
Net change in restricted cash	(136		)	—			758			—			622
Net change in nonmarketable equity investments	—			—			(401		)	—			(401		)
Other, net	(156		)	—			(103		)	102			(157		)
Net cash provided by (used in) investing activities	1,193			8			(3,273		)	(709		)	(2,781		)
Financing activities
Net change in short-term borrowings — third party	72			—			(1,745		)	—			(1,673		)
Net (decrease) increase in deposits	(36		)	—			9,276			—			9,240
Proceeds from issuance of long-term debt — third party	1,084			—			10,145			—			11,229
Repayments of long-term debt — third party	(2,279		)	—			(18,479		)	—			(20,758		)
Net change in debt — intercompany	(30		)	—			(1,788		)	1,818			—
Redemption of preferred stock	(696		)	—			—			—			(696		)
Repurchase of common stock	(173		)	—			—			—			(173		)
Dividends paid — third party	(70		)	—			—			—			(70		)
Dividends paid and returns of contributed capital — intercompany	—			(8		)	(2,968		)	2,976			—
Capital contributions from parent	—			—			3,112			(3,112		)	—
Net cash used in financing activities	(2,128		)	(8		)	(2,447		)	1,682			(2,901		)
Effect of exchange-rate changes on cash and cash equivalents	—			—			2			—			2
Net decrease in cash and cash equivalents	(226		)	—			(1,936		)	71			(2,091		)
Cash and cash equivalents at beginning of year	1,635			—			5,595			(850		)	6,380
Cash and cash equivalents at September 30,	$	1,409		$	—		$	3,659		$	(779	)	$	4,289

60

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	67		$	525		$	5,408		$	(2,030	)	$	3,970
Investing activities
Purchases of available-for-sale securities	—			—			(10,011		)	—			(10,011		)
Proceeds from sales of available-for-sale securities	—			—			4,408			—			4,408
Proceeds from maturities and repayments of available-for -sale securities	—			—			3,141			—			3,141
Net decrease (increase) in finance receivables and loans	398			—			(9,573		)	—			(9,175		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			2,665			—			2,665
Net change in loans — intercompany	2,392			—			1,225			(3,617		)	—
Purchases of operating lease assets	(94		)	—			(3,329		)	—			(3,423		)
Disposals of operating lease assets	—			—			3,855			—			3,855
Capital contributions to subsidiaries	(228		)	(1		)	1			228			—
Returns of contributed capital	881			—			—			(881		)	—
Proceeds from sale of business unit, net	1,049			—			—			—			1,049
Net change in restricted cash	(12		)	—			501			—			489
Net change in nonmarketable equity investments	—			—			(42		)	—			(42		)
Other, net	(29		)	—			54			—			25
Net cash provided by (used in) investing activities	4,357			(1		)	(7,105		)	(4,270		)	(7,019		)
Financing activities
Net change in short-term borrowings — third party	120			—			(1,812		)	—			(1,692		)
Net (decrease) increase in deposits	(72		)	—			5,869			—			5,797
Proceeds from issuance of long-term debt — third party	4,037			—			19,829			—			23,866
Repayments of long-term debt — third party	(5,866		)	—			(17,588		)	—			(23,454		)
Net change in debt — intercompany	(1,117		)	—			(2,393		)	3,510			—
Repurchase and redemption of preferred stock	(442		)	—			—			—			(442		)
Repurchase of common stock	(16		)	—			—			—			(16		)
Dividends paid — third party	(1,356		)	—			—			—			(1,356		)
Dividends paid and returns of contributed capital — intercompany	—			(525		)	(2,386		)	2,911			—
Capital contributions from parent	—			1			227			(228		)	—
Net cash (used in) provided by financing activities	(4,712		)	(524		)	1,746			6,193			2,703
Effect of exchange-rate changes on cash and cash equivalents	—			—			(3		)	—			(3		)
Net (decrease) increase in cash and cash equivalents	(288		)	—			46			(107		)	(349		)
Cash and cash equivalents at beginning of year	2,286			—			3,905			(615		)	5,576
Cash and cash equivalents at September 30,	$	1,998		$	—		$	3,951		$	(722	)	$	5,227

26.    Contingencies and Other Risks

Legal Matters

Ally and its subsidiaries, including Ally Bank, are or may be subject to potential liability in connection with pending or threatened legal proceedings and other matters. These legal matters may be formal or informal and include litigation and arbitration with one or more identified claimants, certified or purported class actions with yet-to-be-identified claimants, and regulatory or other governmental information-gathering requests, examinations, investigations, and enforcement proceedings. Our legal matters exist in varying stages of adjudication, arbitration, negotiation, or investigation and span our lines of business and operations. Claims may be based in law or equity—such as those arising under contracts or in tort and those involving banking, consumer-protection, securities, tax, employment, and other laws—and some can present novel legal theories and allege substantial or indeterminate damages.

We accrue for a legal matter when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment after consultation with counsel. No assurance exists that our accruals will not need to be adjusted in the future.

The course and outcome of legal matters are inherently unpredictable. This is especially so when a matter is still in its early stages, the damages sought are indeterminate or unsupported, significant facts are unclear or disputed, novel questions of law or other meaningful legal

61

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

uncertainties exist, a request to certify a proceeding as a class action is outstanding or granted, multiple parties are named, or regulatory or other governmental entities are involved. As a result, we cannot state with confidence how or when threatened or pending legal matters will be resolved and what losses may be incurred. Actual losses may be higher or lower than any amounts accrued for those matters, possibly to a significant degree.

On the basis of information currently available, advice of counsel, available insurance coverage, and established reserves, it is the opinion of management that, except as described in the next paragraph, the eventual outcome of our existing legal matters will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows. It is possible, however, that an unfavorable resolution of legal matters may be material to our consolidated financial condition, results of operations, or cash flows in a particular period.

Descriptions of our material legal matters follow. In each case, the matter could have material adverse consequences for us, including substantial damages or settlements, injunctions, governmental fines or penalties, and reputational or operational risks. We do not believe, however, that an estimate of reasonably possible losses or a range of reasonably possible losses in excess of established reserves—whether in excess of any related accrual or where no accrual exists—can be made for any of these matters, except as described within Indirect Automotive Finance Matters.

Mortgage Matters

We have received subpoenas from the U.S. Department of Justice (DOJ) that include a broad request for documentation and other information relating to residential mortgage-backed securities issued by our former mortgage subsidiary, Residential Capital, LLC and its subsidiaries (ResCap RMBS). In connection with these requests, the DOJ is investigating potential fraud and other potential legal claims related to ResCap RMBS, including its investigation of potential claims under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989. The DOJ is also investigating potential claims under the False Claims Act (FCA) related to representations made by us in connection with investments in Ally made by the U.S. Department of the Treasury pursuant to the Troubled Asset Relief Program in 2008 and 2009 regarding certain claims against Residential Capital, LLC or its subsidiaries at that time.

We have actively cooperated with the DOJ in connection with its investigations and potential claims. At the request of the DOJ, we entered into an agreement to voluntarily extend the statutes of limitations related to potential FCA claims, but this agreement expired at the end of January 2016. We are currently in advanced settlement discussions to resolve the DOJ’s investigations and potential claims.

During the three months ended September 30, 2016, we established a reserve of $52 million within discontinued operations in connection with potential claims related to our discontinued mortgage business.

Securities Litigation

In October 2016, a purported class action—Bucks County Employees Retirement Fund v. Ally Financial Inc. et al, Case No. 16-013616-CZ—was filed in the Circuit Court for Wayne County in the State of Michigan. The complaint alleges material misstatements and omissions in connection with Ally’s initial public offering in April 2014, including a failure to adequately disclose the severity of rising subprime automotive loan delinquency rates, deficient underwriting measures employed in the origination of subprime automotive loans, and aggressive tactics used with low-income borrowers. The request for relief includes an indeterminate amount of damages, fees, and costs and other remedies. We intend to vigorously defend against this action.

Automotive Subprime Matters

In October 2014, we received a document request from the SEC in connection with its investigation related to subprime automotive finance and related securitization activities. Separately, in December 2014, we received a subpoena from the DOJ requesting similar information. In May 2015, we received an information request from the New York Department of Financial Services requesting similar information. We have cooperated with each of these agencies with respect to these matters.

Indirect Automotive Finance Matters

In December 2013, Ally Financial Inc. and Ally Bank entered into a Consent Order issued by the U.S. Consumer Financial Protection Bureau (CFPB) and a Consent Order jointly submitted with the DOJ and entered by the U.S. District Court for the Eastern District of Michigan (United States v. Ally Financial Inc. and Ally Bank, Civil Action No. 13-15180), in each case, pertaining to allegations of discrimination involving the automotive finance business. The Consent Orders require Ally to create a compliance plan addressing, at a minimum, the communication of Ally’s expectations of Equal Credit Opportunity Act (ECOA) compliance to our automotive dealer clients, maintenance of Ally’s existing limits on dealer finance income for contracts acquired by Ally, and monitoring for potential discrimination both at the dealer level and within our portfolio of contracts acquired across all of our automotive dealer clients. Ally formed a compliance committee consisting of certain Ally and Ally Bank directors to oversee Ally’s execution of the Consent Orders’ terms. Ally is required to meet certain stipulations under the Consent Orders, including a requirement to make monetary payments when ongoing remediation targets are not attained.

Since 2013, Ally has expensed approximately $230 million for judgments, fines, and monetary remuneration payments to customers related to the Consent Orders. Ally expects to expense an additional $10 million to $15 million in the fourth quarter of 2016 for remaining monetary remuneration to customers related to the Consent Orders. The Consent Orders terminate, according to their terms, in 2017, and preclude the CFPB and the DOJ from pursuing any potential violations of the ECOA against Ally Financial Inc. or Ally Bank for conduct

62

Notes to Condensed Consolidated Financial Statements (unaudited)

Ally Financial Inc. • Form 10-Q

undertaken pursuant to the Consent Orders during the period of the Consent Orders. If the CFPB or the DOJ were to assert that Ally Financial Inc. or Ally Bank is violating the ECOA after the Consent Orders terminate, further legal proceedings could occur.

Other Contingencies

Ally and its subsidiaries, including Ally Bank, are or may be subject to potential liability under various other contingent exposures, including indemnification, tax, self-insurance, and other miscellaneous contingencies. We accrue for a contingent exposure when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment. No assurance exists that our accruals will not need to be adjusted in the future, and actual losses may be higher or lower than any amounts accrued for those exposures, possibly to a significant degree. On the basis of information currently available, available insurance coverage, and established reserves, it is the opinion of management that the eventual outcome of our other contingent exposures will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows.

27.    Subsequent Events

Declaration of Quarterly Dividend Payment

On October 18, 2016, the Ally Board of Directors declared a quarterly cash dividend payment of $0.08 per share on all common stock. The dividend is payable on November 15, 2016, to shareholders of record at the close of business on November 1, 2016.

63

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Item 2.    Management's Discussion and Analysis of Financial Condition and Results of Operations

Selected Financial Data

The selected historical financial information set forth below should be read in conjunction with Management’s Discussion and Analysis (MD&A) of Financial Condition and Results of Operations, our Condensed Consolidated Financial Statements, and the Notes to Condensed Consolidated Financial Statements. The historical financial information presented may not be indicative of our future performance.

The following table presents selected Condensed Consolidated Statement of Comprehensive Income and market price data.

	Three months ended September 30,						Nine months ended September 30,
($ in millions, except per share and share data)	2016			2015			2016			2015
Total financing revenue and other interest income	$	2,060		$	2,102		$	6,238		$	6,273
Total interest expense	656			604			1,955			1,824
Depreciation expense on operating lease assets	408			528			1,352			1,713
Net financing revenue	996			970			2,931			2,736
Total other revenue	388			332			1,138			786
Total net revenue	1,384			1,302			4,069			3,522
Provision for loan losses	258			211			650			467
Total noninterest expense	735			674			2,218			2,093
Income from continuing operations before income tax expense	391			417			1,201			962
Income tax expense from continuing operations	130			144			336			341
Net income from continuing operations	261			273			865			621
(Loss) income from discontinued operations, net of tax	(52		)	(5		)	(46		)	405
Net income	$	209		$	268		$	819		$	1,026
Basic earnings per common share:
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.73		$	(1.52	)
Net income (loss)	0.43			0.48			1.63			(0.68		)
Weighted-average common shares outstanding (a)	482,392,811			483,073,329			483,992,930			482,725,342
Diluted earnings per common share:
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.72		$	(1.52	)
Net income (loss)	0.43			0.47			1.63			(0.68		)
Weighted-average common shares outstanding (a) (b)	483,575,307			484,399,091			484,762,142			482,725,342
Market price per common share:
High closing	$	20.04		$	22.99		$	20.04		$	23.88
Low closing	15.73			19.93			14.90			18.71
Period-end closing	19.47			20.38			19.47			20.38
Period-end common shares outstanding	475,469,882			481,750,247			475,469,882			481,750,247

(a) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months endedSeptember 30, 2016, and 2015, respectively.

(b) Due to antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months endedSeptember 30, 2015, basic weighted-average common shares outstanding were used to calculate basic and diluted earnings per share.

64

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents selected balance sheet and ratio data.

	At and for the three months ended September 30,						At and for the nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Selected period-end balance sheet data:
Total assets	$	157,397		$	155,916		$	157,397		$	155,916
Total deposit liabilities	$	75,744		$	64,020		$	75,744		$	64,020
Long-term debt	$	56,836		$	67,293		$	56,836		$	67,293
Preferred stock	$	—		$	813		$	—		$	813
Total equity	$	13,630		$	14,599		$	13,630		$	14,599
Financial ratios:
Return on average assets (a)	0.53		%	0.69		%	0.70		%	0.90		%
Return on average equity (a)	6.08		%	7.37		%	8.01		%	9.20		%
Equity to assets (a)	8.75		%	9.32		%	8.72		%	9.76		%
Common dividend payout ratio	18.60		%	—		%	4.91		%	—		%
Net interest spread (a) (b)	2.58		%	2.54		%	2.54		%	2.42		%
Net yield on interest-earning assets (a) (c)	2.69		%	2.64		%	2.66		%	2.54		%

(a) The ratios were based on average assets and average equity using a combination of monthly and daily average methodologies.

(b) Net interest spread represents the difference between the rate on total interest-earning assets and the rate on total interest-bearing liabilities, excluding discontinued operations for the periods shown.

(c) Net yield on interest-earning assets represents net financing revenue as a percentage of total interest-earning assets.

65

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

As of January 1, 2015, Ally became subject to the rules implementing the 2010 Basel III capital framework in the United States (U.S. Basel III), which reflect new and higher capital requirements, capital buffers, and new regulatory capital definitions, deductions and adjustments. Certain aspects of U.S. Basel III, including the new capital buffers and regulatory capital deductions, will be phased in over several years. To assess our capital adequacy against the full impact of U.S. Basel III, we also present "fully phased-in" information that reflects regulatory capital rules that will take effect as of January 1, 2019. Refer to Note 19 to the Condensed Consolidated Financial Statements for further information. The following table presents selected regulatory capital data.

	September 30, 2016						September 30, 2015
($ in millions)	Transitional			Fully Phased-in (a)			Transitional			Fully Phased-in (a)
Common Equity Tier 1 capital ratio	9.53		%	9.28		%	10.05		%	9.57		%
Tier 1 capital ratio	11.13		%	11.08		%	12.02		%	11.94		%
Total capital ratio	12.80		%	12.74		%	12.95		%	12.88		%
Tier 1 leverage ratio (to adjusted quarterly average assets) (b)	9.73		%	9.71		%	10.43		%	10.41		%
Total equity	$	13,630		$	13,630		$	14,599		$	14,599
Preferred stock	—			—			(813		)	(813		)
Goodwill and certain other intangibles	(273		)	(295		)	(27		)	(27		)
Deferred tax assets arising from net operating loss and tax credit carryforwards (c)	(400		)	(667		)	(381		)	(952		)
Other adjustments	(44		)	(44		)	66			66
Common Equity Tier 1 capital	12,913			12,624			13,444			12,873
Preferred stock	—			—			725			696
Trust preferred securities	2,488			2,488			2,547			2,547
Deferred tax assets arising from net operating loss and tax credit carryforwards	(267		)	—			(571		)	—
Other adjustments	(47		)	(47		)	(58		)	(58		)
Tier 1 capital	15,087			15,065			16,087			16,058
Qualifying subordinated debt and other instruments qualifying as Tier 2	1,169			1,169			280			309
Qualifying allowance for credit losses	1,134			1,134			1,018			1,018
Other adjustments	(47		)	(47		)	(58		)	(58		)
Total capital	$	17,343		$	17,321		$	17,327		$	17,327
Risk-weighted assets (d)	$	135,522		$	135,958		$	133,821		$	134,508

(a) Our fully phased-in capital ratios are non-GAAP financial measures that management believes are important to the reader of the Condensed Consolidated Financial Statements but should be supplemental to, and not a substitute for, primary GAAP measures. The fully phased-in capital ratios are compared to the transitional capital ratios above. We believe these capital ratios are important because we believe investors, analysts, and banking regulators may assess our capital utilization and adequacy using these ratios. Additionally, presentation of these ratios allows readers to compare certain aspects of our capital utilization and adequacy on the same basis to other companies in the industry.

(b) Tier 1 leverage ratio equals Tier 1 capital divided by adjusted quarterly average total assets (which reflects adjustments for disallowed goodwill, certain intangible assets, and disallowed deferred tax assets).

(c) Contains deferred tax assets required to be deducted from capital under U.S. Basel III.

(d) Risk-weighted assets are defined by regulation and are generally determined by allocating assets and specified off-balance sheet exposures into various risk categories.

66

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Overview

Ally Financial Inc. (referred to herein as Ally, Parent, we, our, or us) is a leading digital financial services company offering financial products for consumers, businesses, automotive dealers and corporate clients. Founded in 1919, we have over 95 years of experience providing a broad array of financial products and services. We operate as a financial holding company (FHC) and a bank holding company (BHC). Our banking subsidiary, Ally Bank, is an award-winning online bank, and an indirect, wholly-owned subsidiary of Ally Financial Inc. with a distinct brand and relentless focus on customers, offering a variety of deposit and other banking products.

Discontinued Operations

During 2013 and 2012, certain disposal groups met the criteria to be presented as discontinued operations. The remaining activity relates to previous discontinued operations for which we continue to have wind-down, legal, and minimal operational costs. Refer to Note 26 to the Condensed Consolidated Financial Statements, titled Contingencies and Other Risks, for additional discussion. For all periods presented, the operating results for these operations have been removed from continuing operations. Refer to Note 3 to the Condensed Consolidated Financial Statements for more details. The MD&A has been adjusted to exclude discontinued operations unless otherwise noted.

Change in Reportable Segments

As a result of a change in how management views and operates our business, during the first quarter of 2016, we made changes in the composition of our operating segments. Financial information related to our Corporate Finance business is presented as a separate reportable segment. Previously, all such activity was included in Corporate and Other. Additionally, only the activity of our ongoing bulk acquisitions of mortgage loans and other originations and refinancing is presented in Mortgage Finance operations. The activity related to the management of our legacy mortgage portfolio is included in Corporate and Other. Our other operating segments, Automotive Finance operations and Insurance operations, were unchanged. Amounts for 2015 have been adjusted to conform to the current management view.In connection with the change in operating segments, we defined additional classes of finance receivables and loans: Mortgage Finance and Mortgage — Legacy. Mortgage Finance includes consumer mortgage loans from our ongoing mortgage operations and Mortgage — Legacy includes consumer mortgage loans originated prior to 2009.

Primary Lines of Business

Dealer Financial Services, which includes our Automotive Finance and Insurance operations, Mortgage Finance, and Corporate Finance are our primary lines of business. The following table summarizes the operating results excluding discontinued operations of each line of business. Operating results for each of the lines of business are more fully described in the MD&A sections that follow.

Segment results include cost of funds associated with product offerings. For products originated at Ally Bank, the cost of funds is more beneficial than products originated at other entities as Ally Bank helps fund assets at a lower cost. Noninterest costs associated with deposit gathering activities were $60 million and $185 million during the three and nine months ended September 30, 2016, respectively, and are allocated to each segment based on their relative balance sheet.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015		Favorable/(unfavorable) % change	2016			2015			Favorable/(unfavorable) % change
Total net revenue (loss)
Dealer Financial Services
Automotive Finance	$	1,007		$	933	8	$	2,986		$	2,699		11
Insurance	278			249		12	821			811			1
Mortgage Finance	25			17		47	71			39			82
Corporate Finance	34			32		6	101			86			17
Corporate and Other	40			71		(44)	90			(113		)	180
Total	$	1,384		$	1,302	6	$	4,069		$	3,522		16
Income (loss) from continuing operations before income tax expense
Dealer Financial Services
Automotive Finance	$	319		$	323	(1)	$	1,082		$	1,002		8
Insurance	56			40		40	88			133			(34)
Mortgage Finance	8			4		100	19			2			n/m
Corporate Finance	15			14		7	40			41			(2)
Corporate and Other	(7		)	36		(119)	(28		)	(216		)	87
Total	$	391		$	417	(6)	$	1,201		$	962		25

n/m = not meaningful

67

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

• Our Dealer Financial Services operations offer a wide range of financial services and insurance products to automotive dealerships and their customers. Dealer Financial Services consist of two separate reportable segments — Automotive Finance and Insurance operations.

Our automotive finance services include providing retail installment sales contracts, loans, and leases, offering term loans to dealers, financing dealer floorplans and other lines of credit to dealers, fleet financing, and vehicle remarketing services. The business is centered on our strong and longstanding relationships with automotive dealers and serves the financial needs of over 18,000 dealers in the United States, including over 11,500 dealers outside of the General Motors Company (GM) and Fiat Chrysler Automobiles US LLC (Chrysler) channels, and approximately 4.4 million of their retail customers with a wide range of financial services and insurance products. We believe our dealer-focused business model, with a focus on premium service and deep relationships, value added products and services, and full credit spectrum expertise proven over many credit cycles, makes us the preferred automotive finance company for thousands of our automotive dealer customers. We have developed particularly strong relationships with thousands of dealers resulting from our longstanding relationship with GM as well as relationships with other manufacturers, including Chrysler, providing us with an extensive understanding of the operating needs of these dealers relative to other automotive finance companies.

We have established relationships with thousands of Growth channel (non-GM/Chrysler) dealers through our customer-centric approach and specialized incentive programs. The Growth channel was established as a formal channel in 2012 to focus on developing dealer relationships beyond our existing relationships that primarily were developed through our role as a captive finance company historically for the GM and Chrysler brands. The success of the Growth channel has been a key enabler to converting our business model from a focused captive finance company to a leading market competitor. In this channel, we currently have over 11,500 dealer relationships, of which almost 10,500 are franchised dealers from brands such as Ford, Nissan, Kia, Hyundai, Toyota, Honda and others; RV dealers; and used vehicle only retailers, which have a national presence.

During the first quarter of 2016, we completed the national roll-out of our used lease product. During the third quarter of 2016, we added to our vehicle financing capability with the formation of an experienced transportation and equipment finance team, which will provide commercial financing to companies and municipalities for the purchase or lease of vehicles and equipment such as heavy duty trucks, trailers, buses and cargo vans. Additionally, in August 2016, we strengthened our digital capabilities in automotive financing through the acquisition of technology assets and expertise from Blue Yield, an online automotive lender exchange. This will advance our progress in building a direct-to-consumer option, as well as ultimately driving an end-to-end digital platform. We believe these actions will enable us to respond to the growing trends for a more streamlined and digital automotive financing process to serve both dealers and consumers.

Our Insurance operations offer both consumer finance protection and insurance products sold primarily through the automotive dealer channel, and commercial insurance products sold directly to dealers. As part of our focus on offering dealers a broad range of consumer financial and insurance products, we provide vehicle service contracts (VSC), maintenance coverage, and guaranteed asset protection (GAP) products. We also underwrite selected commercial insurance coverages, which primarily insure dealers' vehicle inventories. As part of our continued efforts to diversify, our Insurance operations launched its new flagship vehicle service contract offering, Ally Premier Protection, nationwide for new and used vehicles of virtually all makes and models in June 2015. Ally Premier Protection is replacing the General Motors Protection Plan nameplate, which will be discontinued in November 2016.

• Our Mortgage Finance operations are limited to the management of a held-for-investment consumer mortgage finance loan portfolio and is primarily comprised of high-quality jumbo and low-to-moderate income (LMI) mortgage loans purchased or originated after January 1, 2009. During the nine months endedSeptember 30, 2016, we continued to execute bulk purchases of mortgage loans that were originated by third parties. Year-to-date purchases have totaled $2.9 billion. We also plan to introduce a direct-to-consumer mortgage product through a strategic partnership in the fourth quarter of 2016.

• Our Corporate Finance operations primarily provide senior secured leveraged cash flow and asset-based loans to mostly U.S.-based middle market companies. The Corporate Finance portfolio is almost entirely comprised of first lien, first out loans. Our primary focus is on businesses owned by private equity sponsors with loans typically used for leveraged buyouts, mergers and acquisitions, debt refinancing, restructurings, and working capital. The portfolio is well diversified across multiple industries including retail, manufacturing, distribution, service companies, and other specialty sectors such as healthcare and technology.

• Corporate and Other primarily consists of activity related to centralized corporate treasury activities such as management of the cash and corporate investment securities and loan portfolios, short- and long-term debt, retail and brokered deposit liabilities, derivative instruments, the amortization of the discount associated with new debt issuances and bond exchanges, and the residual impacts of our corporate funds-transfer pricing (FTP) and asset liability management (ALM) activities. Corporate and Other also includes certain equity investments, the management of our legacy mortgage portfolio, and reclassifications and eliminations between the reportable operating segments. On June 1, 2016, we completed the acquisition of TradeKing Group, Inc. (TradeKing), a digital wealth management company with an online broker/dealer, digital portfolio management platform, and educational content. Beginning in June 2016, financial information related to TradeKing is included within Corporate and Other.

68

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

During the second quarter of 2016, we launched the Ally CashBack Credit Card. This offering generates fee revenue with no direct credit risk exposure due to the structure of the co-brand relationship, and the related activity is included in Corporate and Other.

In addition, as we look ahead, we are well positioned as the marketplace continues to evolve and are working to build on our existing foundation of approximately 5.6 million customers, strong brand, innovative culture, and leading digital platform to expand our products and services and to create an integrated customer experience. In September 2016, we launched our first ever enterprise-wide campaign. Themed "Do It Right," the campaign introduces a broad audience to our full suite of digital financial services and helps crystallize our culture for consumers.

69

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Consolidated Results of Operations

The following table summarizes our consolidated operating results excluding discontinued operations for the periods shown. Refer to the operating segment sections of the MD&A that follows for a more complete discussion of operating results by line of business.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016		2015			Favorable/(unfavorable) % change	2016			2015			Favorable/(unfavorable) % change
Net financing revenue
Total financing revenue and other interest income	$	2,060	$	2,102		(2)	$	6,238		$	6,273		(1)
Total interest expense	656		604			(9)	1,955			1,824			(7)
Depreciation expense on operating lease assets	408		528			23	1,352			1,713			21
Net financing revenue	996		970			3	2,931			2,736			7
Other revenue
Insurance premiums and service revenue earned	238		236			1	704			706			—
(Loss) gain on mortgage and automotive loans, net	—		(2		)	100	4			45			(91)
Loss on extinguishment of debt	—		—			—	(4		)	(354		)	99
Other gain on investments, net	52		6			n/m	145			106			37
Other income, net of losses	98		92			7	289			283			2
Total other revenue	388		332			17	1,138			786			45
Total net revenue	1,384		1,302			6	4,069			3,522			16
Provision for loan losses	258		211			(22)	650			467			(39)
Noninterest expense
Compensation and benefits expense	248		235			(6)	742			726			(2)
Insurance losses and loss adjustment expenses	69		61			(13)	287			239			(20)
Other operating expenses	418		378			(11)	1,189			1,128			(5)
Total noninterest expense	735		674			(9)	2,218			2,093			(6)
Income from continuing operations before income tax expense	391		417			(6)	1,201			962			25
Income tax expense from continuing operations	130		144			10	336			341			1
Net income from continuing operations	$	261	$	273		(4)	$	865		$	621		39

n/m = not meaningful

We earned net income from continuing operations of $261 million and $865 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $273 million and $621 million for the three months and nine months endedSeptember 30, 2015, respectively. The decrease for the three months ended September 30, 2016, was primarily due to an increase in the provision primarily due to higher net charge-offs and higher overall reserve requirements, and an increase in other operating expenses primarily as a result of activities associated with the integration of TradeKing and higher Federal Deposit Insurance Corporation (FDIC) deposit fees. These impacts were partially offset by increases in net financing revenue and other gain on investments. The increase for the nine months ended September 30, 2016, was due to increases in net financing revenue and other gain on investments, and lower losses on the extinguishment of debt due to debt tender offers in the first half of 2015. This was partially offset by a decrease in gain on mortgage and automotive loans, an increase in insurance losses and loss adjustment expenses as a result of higher weather-related losses in 2016, an increase in the provision primarily due to higher net charge-offs and higher overall reserve requirements, and an increase in other operating expenses primarily as a result of activities associated with the integration of TradeKing and higher FDIC deposit fees.

Net financing revenue increased by $26 million and $195 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. Net financing revenue at our Automotive Finance operations was favorably impacted by higher consumer financing revenue primarily due to the successful execution of our continued strategic focus on expanding risk adjusted returns, as well as higher commercial financing revenue primarily resulting from an increase in dealer floorplan assets. The increase was offset by a decrease in operating lease revenue, net of depreciation, primarily resulting from lower lease remarketing gains, and runoff of our GM lease portfolio. Net financing revenue at our Mortgage Finance operations was favorably impacted by portfolio growth as a result of bulk acquisitions of mortgage loans. Net financing revenue at our Corporate Finance operations was favorably impacted by asset growth across all business segments in line with our growth strategy. Total interest expenseincreased9% and 7% for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. Interest on deposits increased $31 million and $78 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015, due to continued deposit growth. Interest on debt increased $21 million and $53 million for the three months and nine months endedSeptember 30, 2016, respectively,

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Ally Financial Inc. • Form 10-Q

compared to the same periods in 2015. The increases were primarily the result of increased LIBOR rates. The increase for the nine months endedSeptember 30, 2016, was partially offset by a decrease due to the repayment of higher-cost legacy debt.

Net gain on mortgage and automotive loans increased $2 million and decreased $41 million and for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The gain for the nine months ended September 30, 2015, was primarily due to a sale of a portfolio of troubled debt restructuring (TDR) loans from our consumer mortgage portfolio.

Loss on extinguishment of debt decreased $350 million for the nine months ended September 30, 2016, compared to the same period in 2015. The decrease was primarily due to the execution of tender offers for legacy, high-cost debt in 2015.

Other gain on investments, net, was $52 million and $145 million for the three months and nine months ended September 30, 2016, respectively, compared to $6 million and $106 million for the same periods in 2015. The increases were primarily due to higher realized investment gains in our equity portfolio, with an increase in sales of securities compared to the same periods in 2015.

The provision for loan losses was $258 million and $650 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $211 million and $467 million for the same periods in 2015. The increase in provision for loan losses during the three and nine months ended September 30, 2016, is primarily due to higher net charge-offs and higher overall reserve requirements both reflecting the changing composition of our retail automotive portfolio to a more profitable mix of business consistent with our underwriting strategy, and higher loan growth within our commercial automotive portfolio year-over-year. The provision for loan losses during the nine months ended September 30, 2016, was also impacted by reserve releases within the commercial automotive portfolio in the prior year that did not repeat in 2016. Refer to the Risk Management section of this MD&A for further discussion.

Insurance losses and loss adjustment expenses increased $8 million and $48 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The increases were primarily due to severe hailstorms, which drove higher weather-related losses.

Other operating expenses increased $40 million and $61 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the three months and nine months ended September 30, 2015. The increases were primarily due to increased expenses from the integration of TradeKing, which was acquired on June 1, 2016, and higher FDIC deposit fees.

We recognized total income tax expense from continuing operations of $130 million and $336 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $144 million and $341 million for the same periods in 2015. The decrease in income tax expense for the three months ended September 30, 2016, compared to the same period in 2015, was primarily driven by lower pretax earnings. The decrease in income tax expense for the nine months ended September 30, 2016, compared to the same period in 2015, was primarily driven by a tax benefit that resulted from a U.S. tax reserve release related to a prior year federal return that reduced our liability for unrecognized tax benefits. This tax benefit was offset by increases in tax expense attributable to higher pretax earnings and the establishment of a valuation allowance on capital loss carryforwards.

In calculating the provision for income taxes from continuing operations, we apply an estimated annual effective tax rate to year-to-date ordinary income on an interim basis. Refer to Note 1 to the Condensed Consolidated Financial Statements for further details.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Dealer Financial Services

Results for Dealer Financial Services are presented by reportable segment, which includes our Automotive Finance and Insurance operations.

Automotive Finance

Results of Operations

The following table summarizes the operating results of our Automotive Finance operations. The amounts presented are before the elimination of balances and transactions with our other reportable segments.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016		2015			Favorable/(unfavorable)% change	2016		2015			Favorable/(unfavorable) % change
Net financing revenue
Consumer	$	911	$	833		9	$	2,654	$	2,363		12
Commercial	267		228			17	781		701			11
Loans held-for-sale	—		2			(100)	—		35			(100)
Operating leases	649		830			(22)	2,119		2,586			(18)
Other interest income	3		2			50	8		6			33
Total financing revenue and other interest income	1,830		1,895			(3)	5,562		5,691			(2)
Interest expense	489		497			2	1,452		1,449			—
Depreciation expense on operating lease assets	408		528			23	1,352		1,713			21
Net financing revenue	933		870			7	2,758		2,529			9
Other revenue
(Loss) gain on automotive loans, net	—		(2		)	100	10		(23		)	143
Other income	74		65			14	218		193			13
Total other revenue	74		63			17	228		170			34
Total net revenue	1,007		933			8	2,986		2,699			11
Provision for loan losses	270		201			(34)	649		460			(41)
Noninterest expense
Compensation and benefits expense	119		121			2	363		370			2
Other operating expenses	299		288			(4)	892		867			(3)
Total noninterest expense	418		409			(2)	1,255		1,237			(1)
Income from continuing operations before income tax expense	$	319	$	323		(1)	$	1,082	$	1,002		8
Total assets	$	113,669	$	113,843		—	$	113,669	$	113,843		—

Components of net operating lease revenue, included in amounts above, were as follows.

	Three months ended September 30,							Nine months ended September 30,
($ in millions)	2016			2015			Favorable/(unfavorable)% change	2016			2015			Favorable/(unfavorable) % change
Net operating lease revenue
Operating lease revenue	$	649		$	830		(22)	$	2,119		$	2,586		(18)
Depreciation expense
Depreciation expense on operating lease assets (excluding remarketing gains)	470			633			26	1,555			1,995			22
Remarketing gains	(62		)	(105		)	(41)	(203		)	(282		)	(28)
Total depreciation expense on operating lease assets	408			528			23	1,352			1,713			21
Total net operating lease revenue	$	241		$	302		(20)	$	767		$	873		(12)

Our Automotive Finance operations earned income from continuing operations before income tax expense of $319 million and $1.1 billion for the three months and nine months endedSeptember 30, 2016, respectively, compared to $323 million and $1.0 billion for the three

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Ally Financial Inc. • Form 10-Q

months and nine months endedSeptember 30, 2015, respectively. Results for the three months endedSeptember 30, 2016, were unfavorably impacted by an increase in provision for loan losses primarily due to higher net charge-offs and higher overall reserve requirements both due to the changing composition of our portfolio to a more profitable mix of business consistent with our underwriting strategy, as well as a decrease in net operating lease revenue primarily resulting from lower gains per unit and the runoff of our GM lease portfolio. Results for both the three months and nine months endedSeptember 30, 2016, were favorably impacted by higher consumer financing revenue primarily due to the successful execution of our continued strategic focus on expanding risk adjusted returns and an increase in consumer assets, as well as higher commercial financing revenue primarily resulting from an increase in dealer floorplan assets. The increase for the nine months endedSeptember 30, 2016, was partially offset by an increase in provision for loan losses primarily due to higher net charge-offs and higher overall reserve requirements both due to the changing composition of our portfolio to a more profitable mix of business consistent with our underwriting strategy, as well as a decrease in net operating lease revenue primarily resulting from lower gains per unit and the runoff of our GM lease portfolio.

Consumer financing revenue (combined with interest income on consumer loans held-for-sale) increased $76 million and $256 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The increases are primarily due to improved portfolio yields as a result of the successful execution of our continued strategic focus on expanding risk adjusted returns.

Commercial financing revenue increased $39 million and $80 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The increases were primarily due to higher floorplan assets, an increase in trucks and sport utility vehicles which have higher average prices than cars, higher benchmark rates, and an increase in non-floorplan dealer loan balances.

Total net operating lease revenue decreased 20% and 12% for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The decreases were primarily driven by lower lease remarketing gains driven by lower gains per unit, partially offset by an increase in termination volume. The decreases were also due to lower operating lease revenue as a result of GM portfolio runoff outpacing originations, which were partially offset by a corresponding decrease in depreciation expense on operating lease assets. We recognized remarketing gains of $62 million and $203 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $105 million and $282 million for the same periods in 2015.

Other income increased 14% and 13% for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015, primarily due to an increase in servicing fee income resulting from higher levels of off-balance sheet retail serviced assets.

The provision for loan losses was $270 million and $649 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $201 million and $460 million for the same periods in 2015. The increases were primarily due to higher net charge-offs and higher overall reserve requirements both due to the changing composition of our portfolio to a more profitable mix of business consistent with our underwriting strategy, higher loan growth within our commercial automotive portfolio year-over-year, as well as reserve releases within the commercial automotive portfolio in the nine months endedSeptember 30, 2015, that did not repeat in 2016. Refer to the Risk Management section of this MD&A for further discussion.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Automotive Financing Volume

Consumer Automotive Financing Volume

The following tables present retail originations by credit tier, average buy rate, and NAALR.

Credit Tier (a)	Volume ($ in billions)		% Share of volume	Average buy rate (b)		NAALR (c)		Average FICO®
Three months ended September 30, 2016
S	$	2.7	32	3.52	%	0.11	%	762
A	3.4		41	6.05		0.76		670
B	1.9		22	9.50		2.67		643
C	0.4		5	13.55		5.50		610
Total retail originations	$	8.4	100	6.41		1.20		689
Three months ended September 30, 2015
S	$	3.8	38	3.31	%	0.15	%	753
A	3.6		36	5.37		0.83		668
B	2.0		20	8.66		2.24		635
C	0.7		6	12.12		3.88		599
Total retail originations	$	10.1	100	5.76		1.09		688
Nine months ended September 30, 2016
S	$	7.9	32	3.52	%	0.13	%	759
A	10.6		42	5.88		0.78		669
B	5.2		21	9.45		2.63		642
C	1.3		5	13.52		5.25		607
D	0.1		—	17.99		8.42		577
Total retail originations	$	25.1	100	6.35		1.20		686
Nine months ended September 30, 2015
S	$	9.9	35	3.20	%	0.15	%	753
A	10.5		37	5.19		0.79		672
B	5.6		20	8.61		2.16		636
C	1.9		7	12.16		3.76		600
D	0.2		1	17.59		5.92		571
Total retail originations	$	28.1	100	5.75		1.11		687

(a) Represents Ally's internal credit score, incorporating numerous borrower and structure attributes including: FICO® Score; severity and aging of delinquency; number of credit inquiries; loan-to-value ratio; and payment-to-income ratio. We originated an insignificant amount of retail loans classified as Tier D during the three months endedSeptember 30, 2016, and 2015, and Tier E during the three months and nine months endedSeptember 30, 2016, and 2015.

(b) Simple weighted average rate at which Ally purchases a retail loan contract from a dealer.

(c) Projected Net Average Annualized Loss Rate.

As compared to projections a year ago for the three and nine months ended September 30, 2015, NAALR increased 11 basis points and 9 basis points, respectively, while the average buy rate for retail originations increased by 65 basis points and 60 basis points, respectively, for the three and nine months ended September 30, 2016. The increases were due to the successful execution of our targeted underwriting strategy to originate consumer automotive assets across a broad risk spectrum, and our continued strategic focus on expanding risk adjusted returns.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents the total retail and lease origination dollars and percentage mix by product type.

	Consumer automotive financing originations				% Share of Ally originations
Three months ended September 30, ($ in millions)	2016		2015		2016	2015
New retail standard	$	4,477	$	5,401	48	49
Used retail	3,759		3,901		40	35
Lease	986		1,035		11	9
New retail subvented	119		757		1	7
Total consumer automotive financing originations (a)	$	9,341	$	11,094	100	100

(a) Includes Commercial Services Group (CSG) originations of $877 million and $962 million for the three months endedSeptember 30, 2016, and 2015, respectively, and RV originations of $133 million and $166 million for the three months endedSeptember 30, 2016, and 2015, respectively.

	Consumer automotive financing originations				% Share of Ally originations
Nine months ended September 30, ($ in millions)	2016		2015		2016	2015
New retail standard	$	12,881	$	14,680	46	46
Used retail	11,875		11,448		43	36
Lease	2,690		3,639		10	12
New retail subvented	323		1,975		1	6
Total consumer automotive financing originations (a)	$	27,769	$	31,742	100	100

(a) Includes CSG originations of $2,560 million and $2,891 million for the nine months ended September 30, 2016, and 2015, respectively, and RV originations of $409 million and $396 million for the nine months ended September 30, 2016, and 2015, respectively.

The following table presents the total retail and lease origination dollars and percentage mix by channel.

	Consumer automotive financing originations				% Share of Ally originations
Three months ended September 30, ($ in millions)	2016		2015		2016	2015
Growth	$	3,326	$	3,495	36	31
GM	3,275		4,941		35	45
Chrysler	2,740		2,658		29	24
Total consumer automotive financing originations	$	9,341	$	11,094	100	100

	Consumer automotive financing originations				% Share of Ally originations
Nine months ended September 30, ($ in millions)	2016		2015		2016	2015
Growth	$	10,127	$	9,644	36	30
GM	9,908		14,925		36	47
Chrysler	7,734		7,173		28	23
Total consumer automotive financing originations	$	27,769	$	31,742	100	100

During the three months and nine months endedSeptember 30, 2016, total consumer originations decreased$1.8 billion and $4.0 billion, respectively, compared to the same periods in 2015. The expected decreases were due to lower volume from the GM channel and the successful execution of our continued strategic focus on expanding risk adjusted returns over volume levels. The decrease in GM volume during the nine months endedSeptember 30, 2016, was partially offset by higher volume in the Growth and Chrysler channels. Growth and Chrysler volume increased 5% and 8%, respectively, for the nine months endedSeptember 30, 2016, compared to the same period in 2015. The increases were driven primarily by expanded offerings and new dealer relationships.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents the percentage of total retail originations by the loan term in months.

	Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015
0-71	18	%	21	%	18	%	22	%
72-75	66		67		67		68
76 +	16		12		15		10
Total retail originations (a)	100	%	100	%	100	%	100	%

(a) Excludes RV loans.

As we continue the execution of our targeted underwriting strategy to originate consumer automotive assets across a broad risk spectrum, retail originations with a term of 76 months or more represented 16% and 15% of total retail originations for the three months and nine months endedSeptember 30, 2016, respectively, compared to 12% and 10% for the same periods in 2015. Substantially all of the loans originated with a term of 76 months or more during the three months endedSeptember 30, 2016, and 2015, were considered to be prime. We define prime retail automotive loans primarily as those loans with a FICO® Score (or an equivalent score) at origination of 620 or greater.

The following table presents the percentage of total retail and lease originations by FICO® Score.

	Three months ended September 30,				Nine months ended September 30,
	2016		2015		2016		2015
740 +	25	%	26	%	23	%	26	%
739-660	36		34		37		34
659-620	24		22		24		22
619-540	9		12		10		12
< 540	1		1		1		1
Unscored (a)	5		5		5		5
Total consumer automotive financing originations	100	%	100	%	100	%	100	%

(a) Unscored are primarily CSG contracts with entities that have no FICO® Score.

Originations with a FICO® Score of less than 620 (considered nonprime) represented 10% and 13% of total consumer originations for the three months endedSeptember 30, 2016, and 2015, respectively, and 11% and 13% for the nine months endedSeptember 30, 2016, and 2015, respectively. Consumer loans and leases with FICO® Scores of less than 540 continued to comprise only 1% of total originations for the three months and nine months endedSeptember 30, 2016. For discussion of our credit risk management practices and performance, refer to the section titled Risk Management within this MD&A.

For discussion of manufacturing marketing incentives, refer to our Annual Report on Form 10-K for the year ended December 31, 2015, as filed on February 24, 2016, with the U.S. Securities and Exchange Commission (SEC), as amended by the Current Report on Form 8-K filed with the SEC on May 5, 2016 (referred to herein as the Annual Consolidated Financial Statements), Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations — Automotive Finance Operations.

Commercial Wholesale Financing Volume

The following table summarizes the average balances of our commercial wholesale floorplan finance receivables of new and used vehicles.

	Average balance				Average balance
	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
GM new vehicles	$	15,368	$	14,410	$	14,897	$	15,026
Chrysler new vehicles	9,025		8,061		9,076		8,103
Growth new vehicles	4,138		3,572		4,161		3,487
Used vehicles	3,903		3,483		3,874		3,406
Total commercial wholesale finance receivables	$	32,434	$	29,526	$	32,008	$	30,022

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Commercial wholesale financing average volume increased $2.9 billion and $2.0 billion during the three months and nine months endedSeptember 30, 2016, compared to the same periods in 2015, primarily due to higher floorplan assets and an increase in trucks and sport utility vehicles which have higher average prices than cars. The increase in floorplan assets is primarily driven by higher dealer stock levels.

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Insurance

Results of Operations

The following table summarizes the operating results of our Insurance operations. The amounts presented are before the elimination of balances and transactions with our other reportable segments.

	Three months ended September 30,							Nine months ended September 30,
($ in millions)	2016			2015			Favorable/ (unfavorable) % change	2016			2015			Favorable/ (unfavorable) % change
Insurance premiums and other income
Insurance premiums and service revenue earned	$	238		$	236		1	$	704		$	706		—
Investment income, net (a)	36			9			n/m	104			93			12
Other income	4			4			—	13			12			8
Total insurance premiums and other income	278			249			12	821			811			1
Expense
Insurance losses and loss adjustment expenses	69			61			(13)	287			239			(20)
Acquisition and underwriting expense
Compensation and benefits expense	16			18			11	51			53			4
Insurance commissions expense	99			95			(4)	290			283			(2)
Other expenses	38			35			(9)	105			103			(2)
Total acquisition and underwriting expense	153			148			(3)	446			439			(2)
Total expense	222			209			(6)	733			678			(8)
Income from continuing operations before income tax expense	$	56		$	40		40	$	88		$	133		(34)
Total assets	$	7,259		$	6,997		4	$	7,259		$	6,997		4
Insurance premiums and service revenue written	$	252		$	254		(1)	$	711		$	755		(6)
Combined ratio (b)	92.5		%	87.7		%		103.2		%	95.3		%

n/m = not meaningful

(a) Includes realized gains on investments of $24 million and $67 million for the three months and nine months endedSeptember 30, 2016, respectively, loss on investments of $5 million for the three months endedSeptember 30, 2015, and gains on investments of $57 million for the nine months endedSeptember 30, 2015; and interest expense of $12 million and $36 million, for the three months and nine months endedSeptember 30, 2016, respectively, and $12 million and $38 million for the three months and nine months endedSeptember 30, 2015, respectively.

(b) Management uses a combined ratio as a primary measure of underwriting profitability. Underwriting profitability is indicated by a combined ratio under 100% and is calculated as the sum of all incurred losses and expenses (excluding interest and income tax expense) divided by the total of premiums and service revenues earned and other fee income.

Our Insurance operations earned income from continuing operations before income tax expense of $56 million and $88 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $40 million and $133 million for the three months and nine months endedSeptember 30, 2015, respectively. The increase for thethree months endedSeptember 30, 2016, was primarily due to higher investment income and a decrease in non-weather-related losses driven by lower loss experience for VSC products partially offset by an increase in weather-related losses. The decrease for the nine months ended September 30, 2016, was due primarily to severe hailstorms which drove higher weather-related losses.

Insurance premiums and service revenue earned was relatively flat for the three months and nine months endedSeptember 30, 2016, compared to the same periods in 2015. The changes for the three months and nine months endedSeptember 30, 2016, were primarily due to increased wholesale earned premium, offset by increased dealer reinsurance participation, and lower VSC volume.

Net investment income was $36 million and $104 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $9 million and $93 million for the three months and nine months endedSeptember 30, 2015, respectively. The increases for the three months and nine months endedSeptember 30, 2016, were due primarily to higher realized investment gains in the equity portfolio as compared to the same periods in 2015.

Insurance losses and loss adjustment expenses totaled $69 million and $287 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $61 million and $239 million for the same periods in 2015. The increases were primarily due to severe hailstorms, which drove higher weather-related losses. The same higher weather-related losses primarily drove the increase in the combined ratio to 92.5% and 103.2% during the three months and nine months endedSeptember 30, 2016, respectively, compared to 87.7% and 95.3% for the three months and nine months endedSeptember 30, 2015, respectively. Higher weather-related losses were partially offset by a decrease in non-weather-related losses driven by lower loss experience for VSC products.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table shows premium and service revenue written by insurance product.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Vehicle service contracts
New retail	$	124		$	120		$	332		$	331
Used retail	109			120			327			385
Reinsurance (a)	(50		)	(47		)	(139		)	(131		)
Total vehicle service contracts (b)	183			193			520			585
Wholesale	49			44			135			122
Other finance and insurance (c)	20			17			56			48
Total	$	252		$	254		$	711		$	755

(a) Reinsurance represents the transfer of premiums and risk from an Ally insurance company to a third party insurance company.

(b) VSC revenue is earned over the life of the service contract on a basis proportionate to the anticipated cost pattern.

(c) Other finance and insurance includes GAP coverage, excess wear and tear, and other ancillary products.

Insurance premiums and service revenue written was $252 million and $711 million for the three months and nine months endedSeptember 30, 2016, compared to $254 million and $755 million for the same periods in 2015. The decreases for the three months and nine months endedSeptember 30, 2016, were due primarily to increased dealer reinsurance participation and lower VSC volume, partially offset by an increase in wholesale premiums.

Cash and Investments

A significant aspect of our Insurance operations is the investment of proceeds from premiums and other revenue sources. We use these investments to satisfy our obligations related to future claims at the time these claims are settled. Our Insurance operations have an Investment Committee, which develops guidelines and strategies for these investments. The guidelines established by this committee reflect our risk tolerance, liquidity requirements, regulatory requirements, and rating agency considerations, among other factors.

The following table summarizes the composition of our Insurance operations cash and investment portfolio at fair value.

($ in millions)	September 30, 2016		December 31, 2015
Cash
Noninterest-bearing cash	$	256	$	293
Interest-bearing cash	1,065		995
Total cash	1,321		1,288
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	68		269
U.S. States and political subdivisions	749		698
Foreign government	180		177
Mortgage-backed	632		694
Asset-backed	5		6
Corporate debt	1,630		1,204
Total debt securities	3,264		3,048
Equity securities	570		717
Total available-for-sale securities	3,834		3,765
Total cash and securities	$	5,155	$	5,053

79

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Mortgage Finance

Results of Operations

The following table summarizes the operating results for our Mortgage Finance operations, which is primarily comprised of high-quality jumbo and LMI mortgage loans purchased or originated after January 1, 2009. The amounts presented are before the elimination of balances and transactions with our other reportable segments.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016		2015		Favorable/(unfavorable) % change	2016		2015		Favorable/(unfavorable) % change
Net financing revenue
Total financing revenue and other interest income	$	64	$	51	25	$	185	$	123	50
Interest expense	39		34		(15)	114		84		(36)
Net financing revenue	25		17		47	71		39		82
Provision for loan losses	1		3		67	4		9		56
Noninterest expense
Compensation and benefits expense	4		1		n/m	10		3		n/m
Other operating expenses	12		9		(33)	38		25		(52)
Total noninterest expense	16		10		(60)	48		28		(71)
Income from continuing operations before income tax expense	$	8	$	4	100	$	19	$	2	n/m
Total assets	$	7,933	$	6,326	25	$	7,933	$	6,326	25

n/m = not meaningful

Our Mortgage Finance operations earned income from continuing operations before income tax expense of $8 million and $19 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $4 million and $2 million for the three months and nine months endedSeptember 30, 2015, respectively. The increases were primarily due to an increase in net financing revenue driven by portfolio growth as a result of bulk acquisitions of mortgage loans, partially offset by prepayments attributed to the low yield environment. The increases were partially offset by an increase in noninterest expense.

Net financing revenue was $25 million and $71 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $17 million and $39 million for the three months and nine months endedSeptember 30, 2015, respectively. The increases in net financing revenue were primarily due to portfolio growth as a result of bulk purchases of high-quality jumbo and LMI mortgage loans, partially offset by prepayments attributed to the low yield environment. During the three months and nine months endedSeptember 30, 2016, respectively, we purchased $467 million and $2.9 billion of mortgage loans that were originated by third parties compared to purchases of $990 million and $3.6 billion for the same periods in 2015. The increases were partially offset by higher funding costs also driven by portfolio growth.

The provision for loan losses decreased$2 million and $5 million for the three months and nine months endedSeptember 30, 2016, compared to the same periods in 2015. The decreases were primarily due to lower portfolio growth compared to the same periods in 2015.

Total noninterest expense was $16 million and $48 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $10 million and $28 million for the three months and nine months endedSeptember 30, 2015. The increases were primarily due to increased expenses to support the growth of the business.

80

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents the net unpaid principal balance (UPB), net UPB as a percentage of total, weighted average coupon (WAC), premium net of discounts, loan-to-value (LTV), and FICO® Scores for the products in our Mortgage Finance held-for-investment loan portfolio.

Product	Net UPB (a) ($ in millions)		% of total net UPB	WAC		Net premium ($ in millions)		Average refreshed LTV (b)		Average refreshed FICO® (c)
September 30, 2016
Adjustable-rate	$	2,335	30	3.35	%	$	39	57.85	%	772
Fixed-rate	5,433		70	4.06		124		61.75		772
Total	$	7,768	100	3.85		$	163	60.58		772
December 31, 2015
Adjustable-rate	$	2,268	36	3.35	%	$	37	58.52	%	771
Fixed-rate	4,021		64	4.10		87		61.42		768
Total	$	6,289	100	3.83		$	124	60.37		769

(a) Represents UPB net of charge-offs.

(b) Updated home values were derived using a combination of appraisals, broker price opinions, automated valuation models, and metropolitan statistical area level house price indices.

(c) Updated to reflect changes in credit score since loan origination.

81

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Corporate Finance

Results of Operations

The following table summarizes the activities of our Corporate Finance operations. The amounts presented are before the elimination of balances and transactions with our reportable segments.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016		2015		Favorable/(unfavorable) % change	2016		2015		Favorable/(unfavorable) % change
Net financing revenue
Interest and fees on finance receivables and loans	$	48	$	36	33	$	138	$	104	33
Interest expense	18		14		(29)	51		40		(28)
Net financing revenue	30		22		36	87		64		36
Total other revenue	4		10		(60)	14		22		(36)
Total net revenue	34		32		6	101		86		17
Provision for loan losses	3		4		25	12		3		n/m
Noninterest expense
Compensation and benefits expense	9		8		(13)	29		24		(21)
Other operating expenses	7		6		(17)	20		18		(11)
Total noninterest expense	16		14		(14)	49		42		(17)
Income from continuing operations before income tax expense	$	15	$	14	7	$	40	$	41	(2)
Total assets	$	3,232	$	2,269	42	$	3,232	$	2,269	42

n/m = not meaningful

Our Corporate Finance operations earned income from continuing operations before income tax expense of $15 million and $40 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $14 million and $41 million for the three months and nine months endedSeptember 30, 2015. The increase for the three months ended September 30, 2016, was a result of higher net financing revenue due primarily to asset growth. The higher net financing revenue was partially offset by a decrease in other revenue primarily driven by declines in loan syndication and investment income, and an increase in noninterest expense. The decrease for the nine months ended September 30, 2016, was primarily driven by lower recoveries on nonaccrual loan exposures compared to 2015, increased portfolio level reserves due primarily to higher asset growth, an increase in noninterest expense, and a decrease in other revenue. These items were largely offset by higher net financing revenue primarily due to asset growth.

Net financing revenue was $30 million and $87 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $22 million and $64 million for the same periods in 2015. The increases were primarily due to asset growth across all business segments in line with our growth strategy, which resulted in a 43% increase in the gross carrying value of finance receivables and loans as of September 30, 2016, compared to September 30, 2015.

Other revenue was $4 million and $14 million for the three and nine months ended September 30, 2016, respectively, compared to $10 million and $22 million for the same periods in 2015. The decreases were due to declines in loan syndication and investment income.

The provision for loan losses decreased $1 million and increased $9 million for the three months and nine months ended September 30, 2016, respectively, compared to the three months and nine months ended September 30, 2015. The decrease for the three months ended September 30, 2016, was primarily due to lower provision expense for individually impaired loans during the three months ended September 30, 2016, compared to the same period in 2015, partially offset by a decrease in recoveries and an increase in non-specific loan loss reserves due to asset growth. The increase for the nine months ended September 30, 2016, was primarily due to higher recoveries on nonaccrual loan exposures in the first quarter of 2015 and increased reserves primarily due to asset growth. The increases were partially offset by lower provisions for individually impaired loans in 2016.

Total noninterest expense was $16 million and $49 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $14 million and $42 million for the same periods in 2015. The increases were primarily due to higher expenses to support the growth of the business.

82

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents loans held-for-sale, the gross carrying value of finance receivables and loans outstanding, and unfunded commitments to lend of our Corporate Finance operations.

($ in millions)	September 30, 2016		December 31, 2015
Loans held-for-sale, net	$	56	$	105
Finance receivables and loans	$	3,182	$	2,568
Unfunded lending commitments (a)	$	1,295	$	1,136

(a) Includes unused revolving credit line commitments for loans held-for-sale and finance receivables and loans, signed commitment letters, and standby letter of credit facilities, which are issued on behalf of clients and may contingently require us to make payments to a third party beneficiary should the client fail to fulfill a contractual commitment.

The following table presents the percentage of total finance receivables and loans of our Corporate Finance operations by industry concentration. The finance receivables and loans are reported at gross carrying value.

	September 30, 2016		December 31, 2015
Industry
Services	26.2	%	22.8	%
Automotive and transportation	12.9		7.1
Other manufactured products	10.5		10.2
Health services	10.4		13.4
Wholesale	9.5		9.7
Chemicals and metals	7.5		13.4
Machinery, equipment, and electronics	7.0		8.5
Retail trade	4.4		3.8
Paper, printing, and publishing	4.2		3.6
Food and beverages	3.9		2.8
Other	3.5		4.7
Total finance receivables and loans	100.0	%	100.0	%

83

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Corporate and Other

The following table summarizes the activities of Corporate and Other. Corporate and Other primarily consists of activity related to centralized corporate treasury activities such as management of the cash and corporate investment securities and loan portfolios, short- and long-term debt, retail and brokered deposit liabilities, derivative instruments, the amortization of the discount associated with new debt issuances and bond exchanges, and the residual impacts of our corporate FTP and treasury ALM activities. Corporate and Other also includes certain equity investments, the management of our legacy mortgage portfolio, the activity related to TradeKing, and reclassifications and eliminations between the reportable operating segments.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015		Favorable/(unfavorable) % change	2016			2015			Favorable/(unfavorable) % change
Net financing (loss) revenue
Total financing revenue and other interest income	$	92		$	92	—	$	273		$	275		(1)
Interest expense
Original issue discount amortization	21			16		(31)	57			45			(27)
Other interest expense	77			31		(148)	245			168			(46)
Total interest expense	98			47		(109)	302			213			(42)
Net financing (loss) revenue (a)	(6		)	45		(113)	(29		)	62			(147)
Other revenue (expense)
(Loss) gain on mortgage loans, net	—			—		—	(6		)	68			(109)
Loss on extinguishment of debt	—			—		—	(4		)	(354		)	99
Other gain on investments, net	28			11		155	78			49			59
Other income, net of losses	18			15		20	51			62			(18)
Total other revenue (expense)	46			26		77	119			(175		)	168
Total net revenue (loss)	40			71		(44)	90			(113		)	180
Provision for loan losses	(16		)	3		n/m	(15		)	(5		)	n/m
Total noninterest expense (b)	63			32		(97)	133			108			(23)
(Loss) income from continuing operations before income tax expense	$	(7	)	$	36	(119)	$	(28	)	$	(216	)	87
Total assets	$	25,304		$	26,481	(4)	$	25,304		$	26,481		(4)

n/m = not meaningful

(a) Refer to the table that follows for further details on the components of net financing (loss) revenue.

(b) Includes a reduction of $190 million and $578 million for both the three months and nine months endedSeptember 30, 2016, respectively, and $189 million and $577 million for the three months and nine months endedSeptember 30, 2015, respectively, related to the allocation of corporate overhead expenses to other segments. The receiving segments record their allocation of corporate overhead expense within other operating expense.

The following table summarizes the components of net financing (loss) revenue for Corporate and Other.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Original issue discount amortization (a)	$	(21	)	$	(16	)	$	(57	)	$	(45	)
Net impact of the funds-transfer pricing methodology	6			53			3			83
Other (including legacy mortgage and TradeKing net financing revenue)	9			8			25			24
Total net financing (loss) revenue for Corporate and Other	$	(6	)	$	45		$	(29	)	$	62
Outstanding original issue discount balance	$	1,347		$	1,400		$	1,347		$	1,400

(a) Amortization is included as interest on long-term debt in the Condensed Consolidated Statement of Comprehensive Income.

84

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents the scheduled remaining amortization of the original issue discount at September 30, 2016.

Year ended December 31, ($ in millions)	2016		2017		2018		2019		2020		2021 and thereafter (a)		Total
Original issue discount
Outstanding balance	$	1,326	$	1,235	$	1,134	$	1,095	$	1,056	$	1,013
Total amortization (b)	21		91		101		39		39		1,056		$	1,347

(a) The maximum annual scheduled amortization for any individual year is $152 million in 2030.

(b) The amortization is included as interest on long-term debt on the Condensed Consolidated Statement of Comprehensive Income.

Loss from continuing operations before income tax expense for Corporate and Other was $7 million and $28 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to income of $36 million for the three months endedSeptember 30, 2016, and a loss of $216 million for the nine months endedSeptember 30, 2015. The decrease in income for the three months endedSeptember 30, 2016, compared to the three months endedSeptember 30, 2015, was primarily due to an increase in interest expense driven by increased LIBOR rates and an increase in interest on deposits resulting from deposit growth, and an increase in noninterest expense driven primarily by the integration of TradeKing and higher FDIC deposit fees. The decrease in income was partially offset by an increase in other gain on investments as a result of increased sales of securities and a decrease in the provision as a result of lower reserve requirements and lower net charge-offs within the legacy mortgage portfolio. The decrease in loss for the nine months endedSeptember 30, 2016, was primarily due to decreases in loss on extinguishment of debt due to debt tender offers in 2015, partially offset by an increase in interest expense driven by increased LIBOR rates and an increase in interest on deposits resulting from deposit growth. Additionally, the decrease in loss was offset by a decrease in gain on mortgage loans due to sales of legacy TDR mortgage loans in 2015.

Interest expense was $98 million and $302 million for the three months and nine months ended, respectively, compared to $47 million and $213 million for the three months and nine months endedSeptember 30, 2015, respectively. The increases were primarily driven by increased LIBOR rates and increases in interest on deposits resulting from deposit growth.

Net loss on mortgage loans was $6 million for the nine months endedSeptember 30, 2016, compared to a net gain of $68 million for the nine months endedSeptember 30, 2015. The change was primarily due to nonrecurring sales of legacy TDR mortgage loans in 2015, which totaled $677 million of unpaid principal balance for the nine months endedSeptember 30, 2015.

Loss on extinguishment of debt was $4 million for the nine months endedSeptember 30, 2016, compared to $354 million for the nine months endedSeptember 30, 2015. The decrease in loss was due to nonrecurring debt tender offers in 2015. During the first half of 2015, we completed two tender offers to buy back $1.8 billion of our high-coupon debt, resulting in a total loss on extinguishment of debt of $345 million related to these transactions.

Other gain on investments was $28 million and $78 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $11 million and $49 million for the three months and nine months endedSeptember 30, 2015, respectively. The increases were due primarily to an increase in sales of securities compared to the same periods in 2015.

The provision for loan losses decreased$19 million and $10 million for the three months and nine months endedSeptember 30, 2016, compared to the same periods in 2015, as a result of lower reserve requirements and lower net charge-offs within the legacy mortgage portfolio.

Noninterest expense was $63 million and $133 million for the three months and nine months endedSeptember 30, 2016, compared to $32 million and $108 million for the three months and nine months endedSeptember 30, 2015. The increases were primarily due to increased expenses from the TradeKing integration and higher FDIC deposit fees.

Total assets were $25.3 billion as of September 30, 2016, compared to $26.5 billion as of September 30, 2015. The decrease was primarily the result of the continued runoff of our legacy mortgage portfolio and a decrease in cash due to secured debt maturities. The decrease was partially offset by an increase in deposits and an increase due to the acquisition of TradeKing. At September 30, 2016, the total assets of TradeKing were $299 million. At September 30, 2016, the gross carrying value of the legacy mortgage portfolio was $2.9 billion, compared to $3.5 billion at September 30, 2015.

85

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Cash and Securities

The following table summarizes the composition of the cash and securities portfolio at fair value for Corporate and Other.

($ in millions)	September 30, 2016		December 31, 2015
Cash
Noninterest-bearing cash	$	1,498	$	1,829
Interest-bearing cash	1,440		3,232
Total cash	2,938		5,061
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	253		1,472
U.S. States and political subdivisions	14		18
Mortgage-backed	12,035		10,153
Asset-backed	1,565		1,749
Total debt securities	13,867		13,392
Total available-for-sale securities	13,867		13,392
Total held-to-maturity securities	658		—
Total cash and securities	$	17,463	$	18,453

86

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Risk Management

Managing the risk/reward trade-off is a fundamental component of operating our businesses. Our risk management program is overseen by the Ally Board of Directors (the Board), various risk committees, the executive leadership team, and our associates. The Risk and Compliance Committee of the Board, together with the Board, sets the risk appetite across our company while the risk committees, executive leadership team, and our associates identify and monitor current and emerging risks and manage those risks to be within our risk appetite. Ally's primary types of risk include credit, lease residual, market, operational, insurance/underwriting, and liquidity. As a result of recent focus by regulators on cross-sell practices and related incentive compensation, Ally management has performed an initial, but detailed review of our cross-sell practices and believes that our existing practices are appropriate, and will be monitored on a continuous basis. For more information on our risk management process, refer to the Risk Management MD&A section of our Annual Consolidated Financial Statements.

Loan and Lease Exposure

The following table summarizes the exposures from our loan and lease activities.

($ in millions)	September 30, 2016		December 31, 2015
Finance receivables and loans
Automotive Finance	$	100,852	$	99,187
Mortgage Finance	7,931		6,413
Corporate Finance	3,182		2,568
Corporate and Other (a)	2,994		3,432
Total finance receivables and loans	114,959		111,600
Loans held-for-sale
Corporate Finance	56		105
Total on-balance sheet loans	115,015		111,705
Off-balance sheet securitized loans
Automotive Finance (b)	2,734		2,529
Total off-balance sheet securitized loans	2,734		2,529
Operating lease assets
Automotive Finance	12,689		16,271
Total operating lease assets	12,689		16,271
Total loan and lease exposure	$	130,438	$	130,505
Serviced loans and leases
Automotive Finance (c)	$	119,625	$	119,808
Mortgage Finance	7,931		6,413
Corporate Finance	3,054		2,532
Corporate and Other	2,926		3,360
Total serviced loans and leases	$	133,536	$	132,113

(a) Includes $2.9 billion and $3.4 billion of consumer mortgage loans in our Mortgage — Legacy portfolio at September 30, 2016, and December 31, 2015, respectively.

(b) Represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions.

(c) Includes $3.6 billion and $2.3 billion of off-balance sheet whole-loan sales at September 30, 2016, and December 31, 2015, respectively.

The risks inherent in our loan and lease exposures are largely driven by changes in the overall economy, used vehicle and housing price levels, unemployment levels, and their impact to our borrowers. The potential financial statement impact of these exposures varies depending on the accounting classification and future expected disposition strategy. We retain the majority of our automotive loans as they complement our core business model, but we do sell loans from time to time on an opportunistic basis. We ultimately manage the associated risks based on the underlying economics of the exposure.

Over the past year, we have experienced growth in our consumer retail automotive loan portfolio and a significant reduction in lease originations. This shift in our portfolio mix has contributed to an increase in provision expense for loan losses. Consumer lease residuals are not included in the allowance for loan losses as changes in the expected residual values on consumer leases are included in depreciation expense over the remaining life of the lease. However, our risk to future fluctuations in used vehicle values has diminished as our lease assets have declined materially and will continue to decline as the number of leases terminating currently is significantly larger than the number of new leases being originated. All leases are exposed to potential reductions in used vehicle values, while only those loans that default, and where we take possession of the vehicle, are affected by potential reductions in used vehicle values. Operating lease assets decreased $3.6 billion to $12.7 billion at September 30, 2016, from $16.3 billion at December 31, 2015.

87

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Credit Risk Management

Credit risk is defined as the potential failure to receive payments due from an obligor in accordance with contractual obligations. Therefore, credit risk is a major source of potential economic loss to us. Credit risk is monitored by several groups and functions throughout the organization, including enterprise and line of business committees and the risk management function. Together, they oversee the credit decisioning and management processes, and monitor credit risk exposures to ensure they are managed in a safe-and-sound manner and are within our risk appetite. In addition, our Loan Review Group provides an independent assessment of the quality of our credit portfolios and credit risk management practices, and directly reports its findings to the Risk and Compliance Committee of the Board on a regular basis.

To mitigate risk, we have implemented specific policies and practices across all lines of business, utilizing both qualitative and quantitative analyses. This reflects our commitment to maintain an independent and ongoing assessment of credit risk and credit quality. Our policies require an objective and timely assessment of the overall quality of the consumer and commercial loan and lease portfolios. This includes the identification of relevant trends that affect the collectability of the portfolios, segments of the portfolios that are potential problem areas, loans and leases with potential credit weaknesses, and the assessment of the adequacy of internal credit risk policies and procedures to monitor compliance with relevant laws and regulations. Our consumer and commercial loan and lease portfolios are subject to regular stress tests that are based on plausible, but unexpected, economic scenarios to ensure that we can withstand a severe economic downturn. In addition, we establish and maintain underwriting policies and volume based limits across our portfolios and higher risk segments (e.g., nonprime) in support of our risk appetite.

We manage credit risk based on the risk profile of the borrower, the source of repayment, the underlying collateral, and current market conditions. We monitor the credit risk profile of individual borrowers and the aggregate portfolio of borrowers either within a designated geographic region or a particular product or industry segment. We perform quarterly analyses of the consumer automotive, consumer mortgage, and commercial portfolios using a range of indicators to assess the adequacy of the allowance for loan losses based on historical and current trends. Refer to Note 7 to the Condensed Consolidated Financial Statements for additional information.

Additionally, we utilize numerous collection strategies to mitigate loss and provide ongoing support to customers in financial distress. For automotive loans, we work with customers when they become delinquent on their monthly payment. In lieu of repossessing their vehicle, we may offer several types of assistance to aid our customers based on their willingness and ability to repay their loan. Loss mitigation may include extension of the loan maturity date and rewriting the loan terms. For mortgage loans, as part of our participation in certain governmental programs, we offer mortgage loan modifications to qualified borrowers. Numerous initiatives are in place to provide support to our mortgage customers in financial distress, including principal forgiveness, maturity extensions, delinquent interest capitalization, and changes to contractual interest rates.

Furthermore, we manage our counterparty credit exposure based on the risk profile of the counterparty. Within our policies, we have established standards and requirements for managing counterparty risk exposures in a safe-and-sound manner. Counterparty credit risk is derived from multiple exposure types, including derivatives, securities trading, securities financing transactions, financial futures, cash balances (e.g., due from depository institutions, restricted accounts, and cash equivalents), and investment in debt securities. For more information on derivative counterparty credit risk, refer toNote 20 to the Condensed Consolidated Financial Statements.

We closely monitor macro-economic trends given the nature of our business and the potential impacts on our credit risk. During the three months and nine months endedSeptember 30, 2016, the U.S. economy continued to modestly expand. The labor market remained stable during the period, with nonfarm payrolls increasing, offset by the annual unemployment rate rising to 5% as of September 30, 2016. Within the U.S. automotive market, new light vehicle sales flattened, resulting in a 17.5 million annual pace for the three months ended September 30, 2016, and we experienced downward pressure on used vehicle values.

On-balance Sheet Portfolio

Our on-balance sheet portfolio includes both finance receivables and loans and loans held-for-sale. At September 30, 2016, this primarily included $100.9 billion of automotive finance receivables and loans and $10.9 billion of mortgage finance receivables and loans. Our ongoing Mortgage Finance operations are limited to the management of our held-for-investment mortgage loan portfolio. During the three months and nine months ended September 30, 2016, we continued to execute bulk purchases of high-quality jumbo and LMI mortgage loans.

88

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The following table presents our total on-balance sheet consumer and commercial finance receivables and loans.

	Outstanding				Nonperforming (a)				Accruing past due 90 days or more
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Consumer
Finance receivables and loans
Loans at gross carrying value	$	75,673	$	74,065	$	642	$	603	$	—	$	—
Loans at fair value	—		—		—		—		—		—
Total finance receivables and loans	75,673		74,065		642		603		—		—
Loans held-for-sale	—		—		—		—		—		—
Total consumer loans (b)	75,673		74,065		642		603		—		—
Commercial
Finance receivables and loans
Loans at gross carrying value	39,286		37,535		111		77		—		—
Loans held-for-sale	56		105		—		—		—		—
Total commercial loans	39,342		37,640		111		77		—		—
Total on-balance sheet loans	$	115,015	$	111,705	$	753	$	680	$	—	$	—

(a) Includes nonaccrual TDR loans of $265 million and $277 million at September 30, 2016, and December 31, 2015, respectively.

(b) Includes outstanding CSG loans of $6.4 billion and $6.2 billion at September 30, 2016, and December 31, 2015, and RV loans of $1.6 billion and $1.5 billion at September 30, 2016, and December 31, 2015, respectively.

Total on-balance sheet loans outstanding at September 30, 2016, increased$3.3 billion to $115.0 billion from December 31, 2015, reflecting an increase of $1.7 billion in the commercial portfolio and an increase of $1.6 billion in the consumer portfolio. The increase in commercial on-balance sheet loans outstanding was primarily driven by the growth of wholesale floorplan finance receivables and the ongoing demand for automotive dealer term loans. The increase in consumer on-balance sheet loans was primarily driven by the execution of bulk purchases of high-quality jumbo and LMI mortgage loans totaling $2.9 billion during the nine months endedSeptember 30, 2016.

Total TDRs outstanding at September 30, 2016, increased $15 million to $640 million from December 31, 2015. Refer to Note 7 to the Condensed Consolidated Financial Statements for additional information.

Total nonperforming loans at September 30, 2016, increased$73 million to $753 million from December 31, 2015, reflecting an increase of $39 million of consumer nonperforming loans and an increase of $34 million of commercial nonperforming loans. The increase in total nonperforming loans from December 31, 2015, was primarily due to the changing composition of the consumer automotive portfolio to a more profitable mix of business consistent with Ally’s underwriting strategy, combined with the downgrade of three accounts within the commercial and industrial portfolio. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is determined not to be probable. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

The following table includes consumer and commercial net charge-offs from finance receivables and loans at gross carrying value and related ratios.

	Three months ended September 30,									Nine months ended September 30,
	Net charge-offs (recoveries)					Net charge-off ratios (a)				Net charge-offs (recoveries)					Net charge-off ratios (a)
($ in millions)	2016		2015			2016		2015		2016		2015			2016		2015
Consumer	$	213	$	162		1.1	%	0.9	%	$	544	$	413		1.0	%	0.8	%
Commercial	—		(1		)	—		—		—		(2		)	—		—
Total finance receivables and loans at gross carrying value	$	213	$	161		0.8	%	0.6	%	$	544	$	411		0.6	%	0.5	%

(a) Net charge-off ratios are calculated as annualized net charge-offs divided by average outstanding finance receivables and loans excluding loans measured at fair value and loans held-for-sale during the period for each loan category.

Net charge-offs were $213 million and $544 million for the three months and nine months endedSeptember 30, 2016, compared to $161 million and $411 million for the three months and nine months endedSeptember 30, 2015. The increases during the three months and nine months endedSeptember 30, 2016, were driven by the changing composition of the consumer automotive portfolio to a more profitable mix

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of business consistent with Ally’s underwriting strategy; lower recoveries on gross charge-offs due to higher unpaid principal balances at the time of charge-off and lower used vehicle values; and the seasoning of consumer automotive accounts now entering their prime loss periods.

The Consumer Credit Portfolio and Commercial Credit Portfolio discussions that follow relate to consumer and commercial finance receivables and loans recorded at gross carrying value. Finance receivables and loans recorded at gross carrying value have an associated allowance for loan losses.

Consumer Credit Portfolio

During the three months and nine months endedSeptember 30, 2016, the credit performance of the consumer portfolio remained strong and reflects both the continued execution of our underwriting strategy to originate consumer automotive assets across a broad risk spectrum, including higher LTV, used, nonprime, extended term, Growth channel, and nonsubvented finance receivables and loans and our continued execution of bulk purchases of high-quality jumbo and LMI mortgage loans. For information on our consumer credit risk practices and policies regarding delinquencies, nonperforming status, and charge-offs, refer to Note 1 to the Annual Consolidated Financial Statements.

The following table includes consumer finance receivables and loans recorded at gross carrying value.

	Outstanding				Nonperforming (a)				Accruing past due 90 days or more
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Consumer automotive (b) (c)	$	64,816	$	64,292	$	542	$	475	$	—	$	—
Consumer mortgage
Mortgage Finance	7,931		6,413		9		15		—		—
Mortgage — Legacy	2,926		3,360		91		113		—		—
Total consumer finance receivables and loans	$	75,673	$	74,065	$	642	$	603	$	—	$	—

(a) Includes nonaccrual TDR loans of $225 million and $233 million at September 30, 2016, and December 31, 2015, respectively.

(b) Includes $66 million of fair value adjustment for loans in hedge accounting relationships at both September 30, 2016, and December 31, 2015. Refer to Note 20 to the Condensed Consolidated Financial Statements for additional information.

(c) Includes outstanding CSG loans of $6.4 billion and $6.2 billion at September 30, 2016, and December 31, 2015, and RV loans of $1.6 billion and $1.5 billion at September 30, 2016, and December 31, 2015.

Total consumer outstanding finance receivables and loans increased$1.6 billion at September 30, 2016, compared with December 31, 2015. The increase in consumer mortgage finance receivables and loans was primarily due to growth in the Mortgage Finance portfolio due to the execution of bulk loan purchases, which outpaced total consumer mortgage portfolio runoff. The increase in consumer automotive finance receivables and loans was primarily related to our loan originations, which outpaced portfolio runoff, largely offset by the completion of $4.2 billion in loan sales and securitizations of higher quality prime assets.

Total consumer nonperforming finance receivables and loans at September 30, 2016, increased$39 million to $642 million from December 31, 2015, reflecting an increase of $67 million of consumer automotive finance receivables and loans and a decrease of $28 million of consumer mortgage nonperforming finance receivables and loans. The increase in nonperforming consumer automotive finance receivables and loans was primarily due to the changing composition of the portfolio to a more profitable mix of business consistent with Ally’s underwriting strategy. The decrease in nonperforming consumer mortgage finance receivables and loans was primarily due to continued improvement in the macroeconomic environment, including increases in the house price index and continued low interest rates, as well as the liquidation of certain nonperforming accounts. Refer to Note 7 to the Condensed Consolidated Financial Statements for additional information. Nonperforming consumer finance receivables and loans as a percentage of total outstanding consumer finance receivables and loans were 0.8% at both September 30, 2016, and December 31, 2015.

Consumer automotive loans accruing and past due 30 days or more decreased $63 million to $1.8 billion at September 30, 2016, compared with December 31, 2015, primarily resulting from seasonality but also due to our collections efforts (e.g., customer contact strategies and tools such as email, text messaging and chat as well as loan extensions and rewrites).

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The following table includes consumer net charge-offs from finance receivables and loans at gross carrying value and related ratios.

	Three months ended September 30,									Nine months ended September 30,
	Net charge-offs (recoveries)					Net charge-off ratios (a)				Net charge-offs (recoveries)				Net charge-off ratios (a)
($ in millions)	2016			2015		2016		2015		2016		2015		2016		2015
Consumer automotive	$	219		$	156	1.4	%	1.0	%	$	540	$	384	1.1	%	0.9	%
Consumer mortgage
Mortgage Finance	—			1		—		—		—		2		—		0.1
Mortgage — Legacy	(6		)	5		(0.9	)	0.6		4		27		0.1		1.0
Total consumer finance receivables and loans	$	213		$	162	1.1	%	0.9	%	$	544	$	413	1.0	%	0.8	%

(a) Net charge-off ratios are calculated as annualized net charge-offs divided by average outstanding finance receivables and loans excluding loans measured at fair value and loans held-for-sale during the period for each loan category.

Our net charge-offs from total consumer finance receivables and loans were $213 million and $544 million for the three months and nine months endedSeptember 30, 2016, compared to $162 million and $413 million for the three months and nine months endedSeptember 30, 2015. The increases during the three months and nine months endedSeptember 30, 2016, were driven by the changing composition of the consumer automotive portfolio to a more profitable mix of business consistent with Ally’s underwriting strategy; lower recoveries on gross charge-offs due to higher unpaid principal balances at the time of charge-off and lower used vehicle values; and the seasoning of consumer automotive accounts now entering their prime loss periods.

The following table summarizes the unpaid principal balance of total consumer loan originations for the periods shown. Total consumer loan originations include loans classified as finance receivables and loans and loans held-for-sale during the period.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive (a)	$	8,355	$	10,059	$	25,079	$	28,103
Consumer mortgage	—		—		7		—
Total consumer loan originations	$	8,355	$	10,059	$	25,086	$	28,103

(a) Includes $1.2 billion of loans originated as held-for-sale during the first quarter of 2015.

Total automotive-originated loans decreased $1.7 billion and $3.0 billion for the three months and nine months ended September 30, 2016, compared to the same periods in 2015, as we continued to execute our strategic focus of selective originations based on improved risk adjusted returns.

The following table shows the percentage of total consumer finance receivables and loans recorded at gross carrying value by state concentration. Total consumer automotive loans were $64.8 billion and $64.3 billion at September 30, 2016, and December 31, 2015, respectively. Total mortgage and home equity loans were $10.9 billion and $9.8 billion at September 30, 2016, and December 31, 2015, respectively.

	September 30, 2016 (a)				December 31, 2015
	Consumer automotive		Consumer mortgage		Consumer automotive		Consumer mortgage
Texas	13.7	%	6.4	%	13.7	%	6.2	%
California	7.7		34.1		7.3		33.6
Florida	8.1		4.2		7.7		4.1
Pennsylvania	4.8		1.5		5.0		1.5
Illinois	4.3		3.3		4.4		4.1
Georgia	4.4		2.2		4.4		2.2
North Carolina	3.6		1.6		3.6		1.8
Ohio	3.6		0.5		3.7		0.6
New York	3.2		1.8		3.5		1.9
Michigan	2.8		1.9		3.1		2.4
Other United States	43.8		42.5		43.6		41.6
Total consumer loans	100.0	%	100.0	%	100.0	%	100.0	%

(a) Presentation is in descending order as a percentage of total consumer finance receivables and loans at September 30, 2016.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

We monitor our consumer loan portfolio for concentration risk across the geographies in which we lend. The highest concentrations of consumer loans are in Texas and California, which represented an aggregate of 24.1% and 23.5% of our total outstanding consumer finance receivables and loans at September 30, 2016, and December 31, 2015, respectively. Our consumer mortgage loan portfolio concentration within California, which is primarily comprised of high-quality jumbo mortgage loans, generally aligns to the California share of jumbo mortgages nationally.

Repossessed and Foreclosed Assets

We classify an asset as repossessed or foreclosed (included in other assets on the Condensed Consolidated Balance Sheet) when physical possession of the collateral is taken. We dispose of the acquired collateral in a timely fashion in accordance with regulatory requirements. For more information on repossessed and foreclosed assets, refer to Note 1 to the Annual Consolidated Financial Statements.

Repossessed consumer automotive loan assets in our Automotive Finance operations at September 30, 2016, increased $7 million to $129 million from December 31, 2015. Foreclosed mortgage assets at September 30, 2016, increased $3 million to $13 million from December 31, 2015.

Commercial Credit Portfolio

During the three months and nine months endedSeptember 30, 2016, the credit performance of the commercial portfolio remained strong, as nonperforming finance receivables and loans remained low and no net charge-offs were realized. For information on our commercial credit risk practices and policies regarding delinquencies, nonperforming status, and charge-offs, refer to Note 1 to the Annual Consolidated Financial Statements.

The following table includes total commercial finance receivables and loans reported at gross carrying value.

	Outstanding				Nonperforming (a)				Accruing past due 90 days or more
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Commercial and industrial
Automotive	$	32,260	$	31,469	$	44	$	25	$	—	$	—
Other (b)	3,250		2,640		62		44		—		—
Commercial real estate — Automotive	3,776		3,426		5		8		—		—
Total commercial finance receivables and loans	$	39,286	$	37,535	$	111	$	77	$	—	$	—

(a) Includes nonaccrual TDR loans of $40 million and $44 million at September 30, 2016, and December 31, 2015, respectively.

(b) Other commercial primarily includes senior secured commercial lending.

Total commercial finance receivables and loans outstanding increased$1.8 billion from December 31, 2015, to $39.3 billion at September 30, 2016. The increase was primarily due to the growth of wholesale floorplan finance receivables and the ongoing demand for automotive dealer term loans, as well as the growth in our Corporate Finance portfolio in line with our business strategy.

Total commercial nonperforming finance receivables and loans were $111 million at September 30, 2016, reflecting an increase of $34 million when compared to December 31, 2015. The increase was primarily due to the downgrade of three accounts within the commercial and industrial portfolio. However, nonperforming commercial finance receivables and loans as a percentage of outstanding commercial finance receivables and loans remained relatively stable at 0.3% at September 30, 2016, compared to 0.2% at December 31, 2015.

The following table includes total commercial net charge-offs from finance receivables and loans at gross carrying value and related ratios.

	Three months ended September 30,									Nine months ended September 30,
	Net (recoveries) charge-offs					Net charge-off ratios (a)				Net (recoveries) charge-offs					Net charge-off ratios (a)
($ in millions)	2016		2015			2016		2015		2016		2015			2016		2015
Commercial and industrial
Automotive	$	—	$	—		—	%	—	%	$	—	$	—		—	%	—	%
Other	—		(1		)	—		(0.2	)	—		(2		)	—		(0.1	)
Total commercial finance receivables and loans	$	—	$	(1	)	—	%	—	%	$	—	$	(2	)	—	%	—	%

(a) Net charge-off ratios are calculated as annualized net charge-offs divided by average outstanding finance receivables and loans excluding loans measured at fair value and loans held-for-sale during the period for each loan category.

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Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Commercial Real Estate

The commercial real estate portfolio consists of finance receivables and loans issued primarily to automotive dealers. Commercial real estate finance receivables and loans were $3.8 billion and $3.4 billion at September 30, 2016, and December 31, 2015, respectively.

The following table presents the percentage of total commercial real estate finance receivables and loans by state concentration. These finance receivables and loans are reported at gross carrying value.

	September 30, 2016		December 31, 2015
Texas	17.3	%	17.7	%
Florida	10.2		10.0
California	8.0		8.7
Michigan	7.7		8.9
New Jersey	4.3		2.1
Georgia	3.7		3.6
North Carolina	3.7		3.8
Pennsylvania	3.3		3.4
South Carolina	2.7		2.2
New York	2.6		3.1
Other United States	36.5		36.5
Total commercial real estate finance receivables and loans	100.0	%	100.0	%

Commercial Criticized Exposure

Finance receivables and loans classified as special mention, substandard, or doubtful are deemed criticized. These classifications are based on regulatory definitions and generally represent finance receivables and loans within our portfolio that have a higher default risk or have already defaulted. These finance receivables and loans require additional monitoring and review including specific actions to mitigate our potential loss.

The following table presents the percentage of total commercial criticized finance receivables and loans by industry concentration. These finance receivables and loans within our automotive and Corporate Finance portfolios are reported at gross carrying value.

	September 30, 2016		December 31, 2015
Industry
Automotive	77.0	%	80.5	%
Manufacturing	7.2		7.8
Services	4.7		5.3
Other	11.1		6.4
Total commercial criticized finance receivables and loans	100.0	%	100.0	%

Total criticized exposures increased $222 million from December 31, 2015, to $2.8 billion at September 30, 2016. The increase was primarily due to the Corporate Finance portfolio and is in line with the overall growth in Corporate Finance loan balances.

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Management's Discussion and Analysis

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Allowance for Loan Losses

The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans.

Three months ended September 30, 2016 ($ in millions)	Consumer automotive			Consumer mortgage			Total consumer			Commercial			Total
Allowance at July 1, 2016	$	862		$	109		$	971		$	118		$	1,089
Charge-offs	(293		)	(10		)	(303		)	—			(303		)
Recoveries	74			16			90			—			90
Net charge-offs	(219		)	6			(213		)	—			(213		)
Provision for loan losses	269			(15		)	254			4			258
Other	—			—			—			—			—
Allowance at September 30, 2016	$	912		$	100		$	1,012		$	122		$	1,134
Allowance for loan losses to finance receivables and loans outstanding at September 30, 2016 (a)	1.4		%	0.9		%	1.3		%	0.3		%	1.0		%
Net charge-offs to average finance receivables and loans outstanding for the three months ended September 30, 2016 (a)	1.4		%	(0.2		)%	1.1		%	—		%	0.8		%
Allowance for loan losses to total nonperforming finance receivables and loans at September 30, 2016 (a)	168.2		%	100.4		%	157.6		%	109.1		%	150.4		%
Ratio of allowance for loan losses to annualized net charge-offs at September 30, 2016	1.0			(4.1		)	1.2			n/m			1.3

n/m = not meaningful

(a) Coverage percentages are based on the allowance for loan losses related to finance receivables and loans excluding those loans held at fair value as a percentage of the unpaid principal balance, net of premiums and discounts.

Three months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Total consumer			Commercial			Total
Allowance at July 1, 2015	$	767		$	119		$	886		$	88		$	974
Charge-offs	(220		)	(10		)	(230		)	(1		)	(231		)
Recoveries	64			4			68			2			70
Net charge-offs	(156		)	(6		)	(162		)	1			(161		)
Provision for loan losses	200			6			206			5			211
Other (a)	(7		)	—			(7		)	1			(6		)
Allowance at September 30, 2015	$	804		$	119		$	923		$	95		$	1,018
Allowance for loan losses to finance receivables and loans outstanding at September 30, 2015 (b)	1.3		%	1.2		%	1.3		%	0.3		%	0.9		%
Net charge-offs to average finance receivables and loans outstanding for the three months ended September 30, 2015 (b)	1.0		%	0.3		%	0.9		%	—		%	0.6		%
Allowance for loan losses to total nonperforming finance receivables and loans at September 30, 2015 (b)	194.5		%	80.1		%	164.3		%	127.1		%	159.9		%
Ratio of allowance for loan losses to annualized net charge-offs at September 30, 2015	1.3			4.9			1.4			n/m			1.6

n/m = not meaningful

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

(b) Coverage percentages are based on the allowance for loan losses related to finance receivables and loans excluding those loans held at fair value as a percentage of the unpaid principal balance, net of premiums and discounts.

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Nine months ended September 30, 2016($ in millions)	Consumer automotive			Consumer mortgage			Total consumer			Commercial			Total
Allowance at January 1, 2016	$	834		$	114		$	948		$	106		$	1,054
Charge-offs	(773		)	(29		)	(802		)	(1		)	(803		)
Recoveries	233			25			258			1			259
Net charge-offs	(540		)	(4		)	(544		)	—			(544		)
Provision for loan losses	644			(10		)	634			16			650
Other (a)	(26		)	—			(26		)	—			(26		)
Allowance at September 30, 2016	$	912		$	100		$	1,012		$	122		$	1,134
Allowance for loan losses to finance receivables and loans outstanding at September 30, 2016 (b)	1.4		%	0.9		%	1.3		%	0.3		%	1.0		%
Net charge-offs to average finance receivables and loans outstanding for the nine months ended September 30, 2016 (b)	1.1		%	—		%	1.0		%	—		%	0.6		%
Allowance for loan losses to total nonperforming finance receivables and loans at September 30, 2016 (b)	168.2		%	100.4		%	157.6		%	109.1		%	150.4		%
Ratio of allowance for loan losses to annualized net charge-offs at September 30, 2016	1.3			n/m			1.4			n/m			1.6

n/m = not meaningful

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

(b) Coverage percentages are based on the allowance for loan losses related to finance receivables and loans excluding those loans held at fair value as a percentage of the unpaid principal balance, net of premiums and discounts.

Nine months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Total consumer			Commercial			Total
Allowance at January 1, 2015	$	685		$	152		$	837		$	140		$	977
Charge-offs	(579		)	(41		)	(620		)	(1		)	(621		)
Recoveries	195			12			207			3			210
Net charge-offs	(384		)	(29		)	(413		)	2			(411		)
Provision for loan losses	510			4			514			(47		)	467
Other (a)	(7		)	(8		)	(15		)	—			(15		)
Allowance at September 30, 2015	$	804		$	119		$	923		$	95		$	1,018
Allowance for loan losses to finance receivables and loans outstanding at September 30, 2015 (b)	1.3		%	1.2		%	1.3		%	0.3		%	0.9		%
Net charge-offs to average finance receivables and loans outstanding for the nine months ended September 30, 2015 (b)	0.9		%	0.5		%	0.8		%	—		%	0.5		%
Allowance for loan losses to total nonperforming finance receivables and loans at September 30, 2015 (b)	194.5		%	80.1		%	164.3		%	127.1		%	159.9		%
Ratio of allowance for loan losses to annualized net charge-offs at September 30, 2015	1.6			3.0			1.7			n/m			1.9

n/m = not meaningful

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

(b) Coverage percentages are based on the allowance for loan losses related to finance receivables and loans excluding those loans held at fair value as a percentage of the unpaid principal balance, net of premiums and discounts.

The allowance for consumer loan losses at September 30, 2016, increased$89 million compared to September 30, 2015. The increase was primarily due to higher reserve requirements reflecting the changing composition of the consumer automotive portfolio to a more profitable mix of business consistent with Ally’s underwriting.

The allowance for commercial loan losses increased$27 million at September 30, 2016, compared to September 30, 2015, primarily due to higher loan balances.

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Ally Financial Inc. • Form 10-Q

Allowance for Loan Losses by Type

The following table summarizes the allocation of the allowance for loan losses by product type.

	2016						2015
September 30, ($ in millions)	Allowance for loan losses		Allowance as a % of loans outstanding		Allowance as a % of total allowance for loan losses		Allowance for loan losses		Allowance as a % of loans outstanding		Allowance as a % of total allowance for loan losses
Consumer
Consumer automotive	$	912	1.4	%	80.4	%	$	804	1.3	%	79.0	%
Consumer mortgage
Mortgage Finance	19		0.2		1.7		17		0.3		1.7
Mortgage — Legacy	81		2.8		7.2		102		2.9		10.0
Total consumer mortgage	100		0.9		8.9		119		1.2		11.7
Total consumer loans	1,012		1.3		89.3		923		1.3		90.7
Commercial
Commercial and industrial
Automotive	33		0.1		2.9		26		0.1		2.5
Other	65		2.0		5.7		47		2.0		4.6
Commercial real estate — Automotive	24		0.6		2.1		22		0.7		2.2
Total commercial loans	122		0.3		10.7		95		0.3		9.3
Total allowance for loan losses	$	1,134	1.0	%	100.0	%	$	1,018	0.9	%	100.0	%

Provision for Loan Losses

The following table summarizes the provision for loan losses by product type.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016			2015		2016			2015
Consumer
Consumer automotive	$	269		$	200	$	644		$	510
Consumer mortgage
Mortgage Finance	1			3		4			9
Mortgage — Legacy	(16		)	3		(14		)	(5		)
Total consumer mortgage	(15		)	6		(10		)	4
Total consumer loans	254			206		634			514
Commercial
Commercial and industrial
Automotive	2			1		4			(39		)
Other	3			4		11			3
Commercial real estate — Automotive	(1		)	—		1			(11		)
Total commercial loans	4			5		16			(47		)
Total provision for loan losses	$	258		$	211	$	650		$	467

The provision for consumer loan losses increased$48 million and $120 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to the same periods in 2015. The increases during the three and nine months ended September 30, 2016, is primarily due to higher net charge-offs and higher overall reserve requirements both reflecting the changing composition of the consumer automotive portfolio to a more profitable mix of business consistent with Ally’s underwriting strategy. The increases were partially offset by both lower reserve requirements and net charge-offs within Mortgage — Legacy, as well as lower portfolio growth year-over-year within Mortgage Finance.

96

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

The provision for commercial loan losses was $4 million and $16 million for the three months and nine months endedSeptember 30, 2016, respectively, compared to $5 million and a net credit of $47 million for the same periods in 2015. The increase during the nine months ended September 30, 2016, was primarily due to reserve releases that did not repeat.

Lease Residual Risk Management

We are exposed to residual risk on vehicles in the consumer lease portfolio. This lease residual risk represents the possibility that the actual proceeds realized upon the sale of returned vehicles will be lower than the projection of these values used in establishing the pricing at lease inception. For information on our valuation of automotive lease residuals including periodic revisions through adjustments to depreciation expense based on current and forecasted market conditions, refer to the section titled Critical Accounting Estimates — Valuation of Automotive Lease Assets and Residuals within the MD&A included in our Annual Consolidated Financial Statements.

Lease Vehicle Terminations and Remarketing

The following table summarizes the volume of lease terminations and average gain per vehicle over recent periods, as well as our methods of vehicle sales at lease termination, stated as a percentage of total lease vehicle disposals. The actual gain per vehicle on lease terminations varies based upon the type of vehicle.

	Three months ended September 30,						Nine months ended September 30,
	2016			2015			2016			2015
Off-lease vehicles terminated (in units)	80,999			65,363			235,820			194,546
Average gain per vehicle ($ per unit)	$	767		$	1,611		$	860		$	1,454
Method of vehicle sales
Auction
Internet	55		%	46		%	55		%	49		%
Physical	14			13			13			11
Sale to dealer, lessee, and other	31			41			32			40

The number of off-lease vehicles remarketed during the three months and nine months endedSeptember 30, 2016, increased 24% and 21%, compared to the same periods in 2015. The increases in the number of off-lease vehicles remarketed during the three months and nine months endedSeptember 30, 2016, reflect a shift of incentive programs from two-year leases in 2012 towards three-year leases in 2013. In 2018 and beyond, our termination volumes, and therefore our residual risk, should decrease significantly as a direct result of lower GM lease originations.

Average gain per vehicle decreased for the three months and nine months endedSeptember 30, 2016, compared to the same periods in 2015. The decreases for the three months and nine months ended September 30, 2016, were due to declining used vehicle values which were more pronounced in the car market, and adjustments to depreciation expense based on changes in expected residual values at lease termination. This trend is expected to continue in the near term. For more information on our investment in operating leases, refer to Note 8 to the Condensed Consolidated Financial Statements, and Note 1 to the Annual Consolidated Financial Statements.

Lease Portfolio Mix

We monitor the concentration of our outstanding operating leases. The following table presents the mix of leased vehicles by type, based on volume of units.

September 30,	2016		2015
Car	33	%	39	%
Truck	16		13
Sport utility vehicle	51		48

Market Risk

Our automotive financing, mortgage, and insurance activities give rise to market risk representing the potential loss in the fair value of assets or liabilities and earnings caused by movements in market variables, such as interest rates, foreign-exchange rates, equity prices, market perceptions of credit risk, and other market fluctuations that affect the value of securities, assets held-for-sale, and operating leases. We are exposed to interest rate risk arising from changes in interest rates related to financing, investing, and cash management activities. More specifically, we have entered into contracts to provide financing and to retain various assets related to securitization activities all of which are exposed in varying degrees to changes in value due to movements in interest rates. Interest rate risk arises from the mismatch between assets and the related liabilities used for funding. We enter into various financial instruments, including derivatives, to maintain the desired level of exposure to the risk of interest rate and other fluctuations. Refer to Note 20 to the Condensed Consolidated Financial Statements for further information.

97

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

We are also exposed to some foreign-currency risk arising from foreign-currency denominated assets and liabilities, primarily in Canada. We enter into hedges to mitigate foreign exchange risk.

We also have exposure to equity price risk, primarily in our Insurance operations, which invests in equity securities that are subject to price risk influenced by capital market movements. We enter into equity options to economically hedge our exposure to the equity markets. Additionally, we have exposure to equity price risk related to certain share-based compensation programs. We enter into prepaid equity forward contracts to economically hedge a portion of this exposure.

Although the diversity of our activities from our complementary lines of business may partially mitigate market risk, we also actively manage this risk. We maintain risk management control systems to monitor interest rates, foreign-currency exchange rates, equity price risks, and any of their related hedge positions. Positions are monitored using a variety of analytical techniques including market value, sensitivity analysis, and value at risk models.

Net Financing Revenue Sensitivity Analysis

Interest rate risk represents our most significant exposure to market risk. We actively monitor the level of exposure so that movements in interest rates do not adversely affect future earnings. We use net financing revenue sensitivity analysis as our primary metric to measure and manage the interest rate sensitivities of our financial instruments.

We prepare forward-looking forecasts of net financing revenue, which take into consideration anticipated future business growth, asset/liability positioning, and interest rates based on the implied forward curve. Simulations are used to assess changes in net financing revenue in multiple interest rates scenarios relative to the baseline forecast. The changes in net financing revenue relative to the baseline are defined as the sensitivity. Our simulation incorporates contractual cash flows and repricing characteristics for all assets, liabilities and off-balance sheet exposures and incorporates the effects of changing interest rates on the prepayment and attrition rates of certain assets and liabilities. The analysis is highly dependent upon a variety of assumptions including the repricing characteristics of deposits with noncontractual maturities. Our simulation does not assume any specific future actions are taken to mitigate the impacts of changing interest rates.Relative to our baseline forecast, which is based on the implied forward curve, our net financing revenue over the next twelve months would decrease by $27 million if interest rates remain unchanged.

The net financing revenue sensitivity tests measure the potential change in our pretax net financing revenue over the following twelve months. A number of alternative rate scenarios are tested, including immediate and gradual parallel shocks to both current spot rates and the market forward curve. We also evaluate nonparallel shocks to interest rates and stresses to certain term points on the yield curve in isolation to capture and monitor a number of risk types.

Our twelve-month pretax net financing revenue sensitivity based on the market forward-curve was as follows.

	September 30, 2016						December 31, 2015
Change in Interest Rates ($ in millions)	Instantaneous			Gradual (a)			Instantaneous			Gradual (a)
-100 basis points	$	(65	)	$	(39	)	$	47		$	17
+100 basis points	17			30			(109		)	(37		)
+200 basis points	(69		)	35			(278		)	(96		)

(a) Gradual changes in interest rates are recognized over 12 months.

Although implied forward rates have declined since December 31, 2015, our earnings exposure has improved when measured by upward interest rate shocks. The shift to an asset sensitive position is primarily due to a reduction in market based funding as non-maturing retail deposits have continued to grow. In addition, higher variable rate commercial loan balances and a net decline in off balance sheet exposure have contributed to the position as of September 30, 2016. The adverse change in the downward interest rate shock scenario is primarily driven by increased prepayment sensitivity across our mortgage loan and mortgage-backed securities portfolios as the portfolios continue to grow. The downward shock scenario is impacted by the current low rate environment, which limits absolute declines in short-term rates in a shock scenario.

The future repricing behavior of retail deposit liabilities, particularly non-maturity deposits, remains a significant driver of interest rate sensitivity. The sustained low interest rate environment increases the uncertainty of assumptions for deposit repricing relationships to market interest rates. Our interest rate risk models use dynamic assumptions driven by a number of factors, including the overall level of interest rates and the spread between short-term and long-term interest rates to project changes in our retail deposit offered rates. Our interest rate risk metrics currently assume a long-term retail deposit beta of greater than 75%. We believe our deposits may ultimately be less sensitive to interest rate changes, which will reduce our overall exposure to rising rates. Assuming a long-term retail deposit beta of 50% (vs. current assumption of greater than 75%) would result in a consolidated interest rate risk position that is asset sensitive.

98

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Our pro-forma rate sensitivity assuming a 50% deposit pass-through based on the forward-curve was as follows.

	September 30, 2016						December 31, 2015
Change in Interest Rates ($ in millions)	Instantaneous			Gradual (a)			Instantaneous			Gradual (a)
-100 basis points	$	(232	)	$	(96	)	$	(89	)	$	(19	)
+100 basis points	133			73			13			4
+200 basis points	212			129			(13		)	(1		)

(a) Gradual changes in interest rates are recognized over 12 months.

Our asset sensitive risk position is reduced slightly by the net impact of off balance sheet hedging positions which continue to generate positive financing revenue in the current interest rate environment. This position includes both receive-fixed interest rate swaps designated as fair value hedges of certain fixed-rate liabilities, including legacy unsecured debt, and pay-fixed interest rate swaps designated as fair value hedges of certain retail automotive assets. The size, maturity and mix of our hedging activities change frequently as we adjust our broader asset and liability management objectives.

99

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Liquidity Management, Funding, and Regulatory Capital

Overview

The purpose of liquidity management is to ensure our ability to meet loan and lease demand, debt maturities, deposit withdrawals, and other cash commitments under both normal operating conditions as well as periods of economic or financial stress. Our primary objective is to maintain cost-effective, stable and diverse sources of funding capable of sustaining the organization throughout all market cycles. Sources of funding include both retail and brokered deposits and secured and unsecured market-based funding across various maturity, interest rate, and investor profiles. Additional liquidity is available through a pool of unencumbered highly liquid securities, borrowing facilities, repurchase agreements, as well as funding programs supported by the Federal Reserve and the Federal Home Loan Bank of Pittsburgh (FHLB).

We define liquidity risk as the risk that an institution's financial condition or overall safety and soundness is adversely affected by an inability, or perceived inability, to meet its financial obligations, and to withstand unforeseen liquidity stress events. Liquidity risk can arise from a variety of institution specific or market-related events that could have a negative impact on cash flows available to the organization. Effective management of liquidity risk helps ensure an organization's preparedness to meet cash flow obligations caused by unanticipated events. Managing liquidity needs and contingent funding exposures has proven essential to the solvency of financial institutions.

The Asset-Liability Committee (ALCO) is chaired by the Corporate Treasurer and is responsible for overseeing our liquidity, funding strategies and plans, contingency funding plans, and counterparty credit exposure arising from financial transactions. Corporate Treasury is responsible for managing our liquidity positions within prudent operating guidelines and targets approved by ALCO and the Risk and Compliance Committee of the Ally Board of Directors. Liquidity risk is managed for the parent company, Ally Bank, and the consolidated organization. The parent company and Ally Bank prepare periodic forecasts depicting anticipated funding needs and sources of funds with oversight and monitoring by the Liquidity Risk group within Corporate Treasury. Corporate Treasury executes our funding strategies and manages liquidity under baseline economic projections as well as more severely stressed macroeconomic environments.

Funding Strategy

Liquidity and ongoing profitability are largely dependent on the timely and cost-effective access to retail deposits and funding in different segments of the capital markets. Our funding strategy largely focuses on the development of diversified funding sources across a broad investor base to meet liquidity needs throughout different market cycles, including periods of financial distress. These funding sources include retail and brokered deposits, committed credit facilities, public and private asset-backed securitizations, wholesale and retail unsecured debt, FHLB advances, and whole-loan sales. We also supplement these funding sources with a modest amount of short-term borrowings, including demand notes and repurchase arrangements. The diversity of our funding sources enhances funding flexibility, limits dependence on any one source, and results in a more cost-effective funding strategy over the long term. We evaluate funding markets on an ongoing basis to achieve an appropriate balance of unsecured and secured funding sources and maturity profiles. In addition, we further distinguish our funding strategy between Ally Bank funding and parent company (nonbank) funding.

We diversify Ally Bank's overall funding in order to reduce reliance on any one source of funding and to achieve a well-balanced funding portfolio across a spectrum of risk, duration, and cost of funds characteristics. We optimize our funding sources at Ally Bank by growing retail deposits, maintaining active public and private securitization programs, managing a prudent maturity profile of our brokered deposit portfolio, utilizing repurchase agreements, and continuing to access funds from the FHLB.

Since 2009, a significant portion of asset originations have been directed to Ally Bank in order to reduce parent company exposures and funding requirements, and to utilize our growing consumer deposit-taking capabilities. This has allowed us to use bank funding for a wider array of our automotive finance assets and to provide a sustainable long-term funding channel for the business, while also improving the cost of funds for the enterprise. On March 7, 2016, Ally Bank received approval from the Federal Reserve to become a state member bank. Ally Bank is now regulated by the FRB through the Federal Reserve Bank of Chicago, as well as the Utah Department of Financial Institutions. In addition, in connection with the application for membership in the Federal Reserve System, Ally Bank made commitments to the FRB relating to capital, liquidity, and business plan requirements. These commitments are consistent with the prior requirements under the now-terminated Capital and Liquidity Maintenance Agreement with the FDIC, including the requirement to maintain capital at a level such that Ally Bank’s Tier 1 leverage ratio is at least 15%. For this purpose, the leverage ratio is determined in accordance with the FRB's regulations related to capital maintenance. Continuation of the Ally Bank Tier 1 leverage ratio requirement could further restrict balance sheet growth within Ally Bank and could unfavorably impact liquidity at AFI.

Liquidity Risk Management

Multiple metrics are used to frame the level of liquidity risk, manage the liquidity position, and identify related trends. These metrics include coverage ratios and stress tests that measure the sufficiency of the liquidity portfolio, stability ratios that measure longer-term structural liquidity, and concentration ratios that ensure prudent funding diversification. In addition, we have established internal management routines designed to review all aspects of liquidity and funding plans, evaluate the adequacy of liquidity buffers, review stress testing results, and assist senior management in the execution of its funding strategy and risk management accountabilities.

100

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

We maintain available liquidity in the form of cash, unencumbered highly liquid securities, and available committed credit facility capacity that, taken together, would allow us to operate and to meet our contractual and contingent obligations in the event that market-wide disruptions and enterprise-specific events disrupt normal access to funding. The available liquidity is held at various entities and considers regulatory restrictions and tax implications that may limit our ability to transfer funds across entities. The following table summarizes our total available liquidity.

September 30, 2016($ in millions)	Ally Bank			Parent company (nonbank) (a)
Unencumbered highly liquid U.S. federal government and U.S. agency securities	$	8,165		$	1,687
Liquid cash and equivalents	1,864			1,933
Committed funding facilities (b)
Total capacity	4,110			14,525
Outstanding	3,460			11,725
Unused capacity (c)	650			2,800
Intercompany loan (d)	(300		)	300
Total available liquidity	$	10,379		$	6,720

(a) Parent company liquidity is defined as our consolidated operations less Ally Bank and the regulated subsidiaries of Ally Insurance's holding company.

(b) Committed funding facilities include both consolidated and nonconsolidated facilities.

(c) Funding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

(d) To optimize cash and secured facility capacity between entities, the parent company lends cash to Ally Bank on occasion under an intercompany loan agreement. Amounts outstanding on this loan are repayable to the parent company upon demand, subject to a five day notice period.

As of September 30, 2016, assuming a long-term capital markets stress, we expect that our available liquidity would allow us to continue to fund all planned loan originations and meet all of our financial obligations for approximately 36 months, assuming no issuance of unsecured debt or term securitizations.

In addition, our estimated Modified Liquidity Coverage Ratio exceeded 100% at September 30, 2016. Refer to Note 19 to the Condensed Consolidated Financial Statements for further discussion of our liquidity requirements.

Ally Bank

Ally Bank gathers retail deposits directly from customers through direct banking via the internet, telephone, mobile, and mail channels. These retail deposits provide our Automotive Finance, Mortgage Finance, and Corporate Finance operations with a stable and low-cost funding source.

Optimizing bank funding continues to be a key part of our long-term liquidity strategy. We have made significant progress in migrating asset originations to Ally Bank and growing our retail deposit base since becoming a BHC in December 2008. Retail deposit growth is a key driver of optimizing funding costs and reducing reliance on capital markets based funding. We believe deposits provide a stable, low-cost source of funds that are less sensitive to interest rate changes, market volatility, or changes in credit ratings when compared to other funding sources. We have continued to expand our deposit gathering efforts through both direct and indirect marketing channels. Current retail deposit offerings consist of a variety of products including CDs, savings accounts, money market accounts, IRA deposit products, as well as an interest checking product. In addition, we utilize brokered deposits, which are obtained through third-party intermediaries.

The following table shows Ally Bank's number of accounts and deposit balances by type as of the end of each quarter since 2015.

($ in millions)	3rd Quarter 2016		2nd Quarter 2016		1st Quarter 2016		4th Quarter 2015		3rd Quarter 2015		2nd Quarter 2015		1st Quarter 2015
Number of retail accounts	2,203,147		2,133,657		2,061,923		1,969,562		1,931,380		1,874,632		1,818,770
Deposits
Retail	$	63,880	$	61,239	$	58,977	$	55,437	$	53,502	$	51,750	$	50,633
Brokered	11,570		11,269		10,979		10,723		10,180		9,844		9,835
Other (a)	101		94		91		89		91		89		79
Total deposits	$	75,551	$	72,602	$	70,047	$	66,249	$	63,773	$	61,683	$	60,547

(a) Other deposits include mortgage escrow and other deposits (excluding intercompany deposits).

During the first nine months of 2016, the deposit base at Ally Bank grew $9.3 billion. The growth in total deposits has been primarily attributable to our retail deposit portfolio, particularly within our savings and money market accounts. Strong retention rates and customer acquisition continue to drive growth in retail deposits. Refer to Note 12 to the Condensed Consolidated Financial Statements for a summary of deposit funding by type.

101

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

In addition to building a larger deposit base, we continue to remain active in the securitization markets to finance our Ally Bank automotive loan products. Securitization has proven to be a reliable and cost-effective funding source. Additionally, for retail automotive loans and lease notes, the term structure of the transaction locks in funding for a specified pool of loans and leases for the life of the underlying asset, creating an effective tool for managing interest rate and liquidity risk. We manage secured funding execution risk by maintaining a diverse investor base and available committed credit facility capacity. Ally Bank has exclusive access to private committed funding facilities, the largest of which is a syndicated credit facility of sixteen lenders shared with the parent company. This facility can fund automotive retail and dealer floorplan loans, as well as leases. During March 2016, this facility was renewed with $3.0 billion of capacity and the maturity was extended to March 2018. In July 2016, $400 million of the commitment under this facility was transferred from Ally Bank to AFI (parent company), which reduced the Ally Bank capacity to $2.6 billion. Our ability to access the unused capacity in the secured facility depends on the availability of eligible assets to collateralize the incremental funding and, in some instances, on the execution of interest rate hedges.

Ally Bank also has access to funding through advances with the FHLB. These advances are primarily secured by consumer mortgage and commercial real estate automotive finance receivables and loans. As of September 30, 2016, Ally Bank had pledged $14.5 billion of assets to the FHLB resulting in $10.2 billion in total funding capacity with $8.4 billion of debt outstanding.

In addition, Ally Bank has access to repurchase agreements. A repurchase agreement is a transaction in which the firm sells financial instruments to a buyer, typically in exchange for cash, and simultaneously enters into an agreement to repurchase the same or substantially the same financial instruments from the buyer at a stated price plus accrued interest at a future date. The financial instruments sold in repurchase agreements typically include U.S. government and federal agency obligations. As of September 30, 2016, Ally Bank had no debt outstanding under repurchase agreements.

Additionally, Ally Bank has access to the Federal Reserve Bank Discount Window and can borrow funds to meet short-term liquidity demands. However, the Federal Reserve Bank is not a primary source of funding for day to day business. Instead, it is a liquidity source that can be accessed in stressed environments or periods of market disruption. Ally Bank has assets pledged and restricted as collateral to the Federal Reserve Bank totaling $2.4 billion. Ally Bank had no debt outstanding with the Federal Reserve as of September 30, 2016.

Parent Company (Nonbank) Funding

Funding sources at the parent company generally consist of long-term unsecured debt, unsecured retail term notes, floating rate demand notes, committed credit facilities, asset-backed securitizations, and a modest amount of short-term borrowings. The parent company's ability to access unused capacity in secured facilities depends on the availability of eligible assets to collateralize the incremental funding and, in some instances, on the execution of interest rate hedges.

We continue to remain active in the securitization markets to finance our automotive loan portfolios. During the third quarter of 2016, we raised $1.5 billion through the completion of two securitization transactions backed by retail automotive loans. In addition, we have short-term and long-term unsecured debt outstanding from retail term note programs. These programs generally consist of callable fixed-rate instruments with fixed-maturity dates. There were $440 million of retail term notes outstanding at September 30, 2016.

We obtain unsecured funding from the sale of floating-rate demand notes under our Demand Notes program. The holder has the option to require us to redeem these notes at any time without restriction. Demand Notes outstanding were $3.5 billion at September 30, 2016. Refer to Note 13 and Note 14 to the Condensed Consolidated Financial Statements for additional information about our outstanding short-term borrowings and long-term unsecured debt, respectively.

Secured funding continues to be a significant source of financing at the parent company. The total capacity in our committed funding facilities is provided by banks and other financial institutions through private transactions. The committed secured funding facilities can be revolving in nature and allow for additional funding during the commitment period, or they can be amortizing and not allow for any further funding after the closing date. At September 30, 2016, all of our $14.5 billion of committed capacity was revolving. Our revolving facilities generally have an original tenor ranging from 364 days to two years. As of September 30, 2016, we had $11.5 billion of committed funding capacity from revolving facilities with a remaining tenor greater than 364 days. The parent company's largest facility is a revolving syndicated credit facility secured by automotive receivables. This facility was renewed in March 2016 by a syndicate of sixteen lenders with $8.0 billion in capacity and the maturity was extended until March 2018. In July 2016, $400 million of the commitment under this facility was transferred from Ally Bank to AFI (parent company), which increased the parent company capacity to $8.4 billion. In the event this facility is not renewed at maturity, the outstanding debt will be repaid over time as the underlying collateral amortizes. At September 30, 2016, there was $6.6 billion outstanding under this facility. In addition to our syndicated revolving credit facility, we also maintain various bilateral and multilateral secured credit facilities that fund our Automotive Finance operations. These are primarily private securitization facilities that fund a specific pool of automotive assets.

At September 30, 2016, the parent company had debt of $659 million outstanding under repurchase agreements.

102

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Recent Funding Developments

During the first nine months of 2016, we accessed the public and private markets to execute secured funding transactions, whole-loan sales, unsecured funding transactions, and funding facility renewals totaling $24.1 billion. Key funding highlights from January 1, 2016 to date were as follows:

• Ally Financial Inc. closed, renewed, increased, and/or extended $15.7 billion in U.S. credit facilities during the nine months ended September 30, 2016. The automotive credit facility renewal amount includes the March 2016 refinancing of $11.0 billion for our shared credit facilities at both the parent company and Ally Bank with a syndicate of sixteen lenders. The $11.0 billion capacity is secured by retail, lease, and dealer floorplan automotive assets and is allocated to two separate facilities; one is an $8.4 billion facility which is available to the parent company, while the other is a $2.6 billion facility available to Ally Bank. Both facilities mature in March 2018.

• Ally Financial Inc. continued to access the public and private term asset-backed securitization markets raising $4.8 billion during the nine months ended September 30, 2016, with $2.3 billion and $2.5 billion raised by Ally Bank and the parent company, respectively. Included in Ally Bank's funding for 2016 are two off-balance sheet securitizations backed by retail automotive loans, which raised $1.5 billion. In addition, Ally Bank raised $2.7 billion related to whole-loan sales of retail automotive loans during the first nine months of 2016.

• In April 2016, Ally Financial Inc. accessed the unsecured debt capital markets and raised $900 million through the issuance of $600 million and $300 million of aggregate principal amount of senior and subordinated notes, respectively.

Funding Sources

The following table summarizes our sources of funding and the amount outstanding under each category for the periods shown.

($ in millions)	Bank		Parent		Total		%
September 30, 2016
Secured financings	$	17,726	$	21,849	$	39,575	28
Institutional term debt	—		19,249		19,249		14
Retail debt programs (a)	—		3,965		3,965		3
Total debt (b)	17,726		45,063		62,789		45
Deposits (c)	75,551		193		75,744		55
Total on-balance sheet funding	$	93,277	$	45,256	$	138,533	100
December 31, 2015
Secured financings	$	24,790	$	25,129	$	49,919	36
Institutional term debt	—		20,235		20,235		14
Retail debt programs (a)	—		3,850		3,850		3
Total debt (b)	24,790		49,214		74,004		53
Deposits (c)	66,249		229		66,478		47
Total on-balance sheet funding	$	91,039	$	49,443	$	140,482	100

(a) Includes $440 million and $397 million of retail term notes at September 30, 2016, and December 31, 2015, respectively.

(b) Excludes fair value adjustment as described in Note 20 to the Condensed Consolidated Financial Statements.

(c) Bank deposits include retail, brokered, mortgage escrow, and other deposits. Parent deposits include dealer deposits. Intercompany deposits are not included.

Refer to Note 14 to the Condensed Consolidated Financial Statements for a summary of the scheduled maturity of long-term debt at September 30, 2016.

Cash Flows

Net cash provided by operating activities was $3.6 billion for the nine months endedSeptember 30, 2016, compared to $4.0 billion for the same period in 2015. The change was primarily a result of a $0.5 billion increase of cash outflows from other assets and a $0.4 billion decrease in loss on extinguishment of debt. This was partially offset by a $0.5 billion gain on sale of subsidiaries in 2015.

Net cash used in investing activities was $2.8 billion for the nine months endedSeptember 30, 2016, compared to $7.0 billion for the same period in 2015. The change was a result of an increase in net cash inflows from purchases, sales, maturities and repayment of available-for-sale securities of $2.4 billion. Also contributing to the change was an increase in proceeds from sales of finance receivables and loans of $2.4 billion and an increase in net cash inflows from operating lease activity of $1.8 billion. This was partially offset by $1.0 billion in proceeds from the sale of a business unit in 2015, purchases of $0.7 billion of held-to maturity securities, an increase of $0.4 billion in net cash used due to the purchase of nonmarketable equity investments, and $0.3 billion due to the acquisition of TradeKing.

103

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Net cash used in financing activities for the nine months endedSeptember 30, 2016, was $2.9 billion, compared to $2.7 billion net cash provided for the same period in 2015. The change in financing activities was primarily due to cash used for the repayment of long-term debt exceeding cash from issuance of long-term debt by $9.5 billion for the nine months ended September 30, 2016. This is compared to cash provided by the issuance of long-term debt exceeding the repayment of long-term debt by $0.4 billion for the same period in 2015. This was partially offset by an increase in deposits of $3.4 billion during the nine months endedSeptember 30, 2016, compared to the same period in 2015, and a $1.3 billion decrease in dividends paid on preferred stock.

Capital Planning and Stress Tests

As a BHC with $50 billion or more of consolidated assets, Ally is required to conduct periodic company-run stress tests, is subject to an annual supervisory stress test conducted by the Federal Reserve Bank (FRB), and must submit an annual capital plan to the FRB.

Ally’s capital plan must include a description of all planned capital actions over a nine-quarter planning horizon. The capital plan must also include a discussion of how Ally will maintain capital above the minimum regulatory capital ratios under baseline, adverse, and severely adverse economic scenarios, and serve as a source of strength to Ally Bank. The FRB must approve Ally's capital plan before Ally may take any capital action. Even with an approved capital plan, Ally must seek the approval of the FRB before making a capital distribution if, among other factors, Ally would not meet its regulatory capital requirements after making the proposed capital distribution.

On April 5, 2016, we submitted the results of our semi-annual stress test and our annual capital plan to the FRB. On June 23, 2016, we publicly disclosed summary results of the stress test under the most severe scenario in accordance with regulatory requirements. On June 29, 2016, we received a non-objection to our capital plan from the FRB, including the proposed capital actions contained in our submission. The proposed capital actions include a quarterly cash dividend of $0.08 per share of our common stock, subject to quarterly approval by the Board of Directors, and the ability to repurchase up to $700 million of our common stock from time to time through the second quarter of 2017. In addition, we submitted to the FRB the results of our company-run mid-year stress test conducted under multiple macroeconomic scenarios and disclosed the results of this stress test under the most severe scenario on October 5, 2016, in accordance with regulatory requirements.

On July 18, 2016, the Ally Board of Directors declared a quarterly cash dividend payment of $0.08 per share on all common stock. The dividend was paid on August 15, 2016, to shareholders of record at the close of business on August 1, 2016. On October 18, 2016, the Ally Board of Directors declared a second quarterly cash dividend payment of $0.08 per share on all common stock. Refer to Note 27 to the Condensed Consolidated Financial Statements for further information regarding this common share dividend. Additionally, the Ally Board of Directors authorized a common stock repurchase program of up to $700 million beginning in the third quarter of 2016 and continuing through the second quarter of 2017. During the third quarter of 2016, we repurchased $159 million, or 8,297,653 shares of common stock under this program, which reduced total shares outstanding by approximately 1.7%. We had 475,469,882 shares of common stock outstanding at September 30, 2016.

In September 2016, the FRB proposed a rule that would, among other things, revise the capital plan rule to no longer subject large and noncomplex firms, including Ally, to the provisions of the existing rule whereby the FRB may object to a capital plan on the basis of qualitative deficiencies in the firm’s capital planning process. Under the proposed rule, the qualitative assessment of Ally’s capital plan would be conducted outside of the Comprehensive Capital Analysis and Review (CCAR) process, through the supervisory review process, and Ally’s reporting requirements would be modified to reduce certain reporting burdens related to capital planning and stress testing. The proposed rule would take effect for the 2017 capital planning cycle.

Regulatory Capital

Refer to Note 19 to the Condensed Consolidated Financial Statements and Selected Financial Data within this MD&A.

Credit Ratings

The cost and availability of unsecured financing are influenced by credit ratings, which are intended to be an indicator of the creditworthiness of a particular company, security, or obligation. Lower ratings result in higher borrowing costs and reduced access to capital markets. This is particularly true for certain institutional investors whose investment guidelines require investment-grade ratings on term debt and the two highest rating categories for short-term debt (particularly money market investors).

104

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Nationally recognized statistical rating organizations rate substantially all our debt. The following table summarizes our current ratings and outlook by the respective nationally recognized rating agencies.

Rating agency	Short-term	Senior unsecured debt	Outlook	Date of last action
Fitch	B	BB+	Stable	September 28, 2016 (a)
Moody’s	Not Prime	Ba3	Stable	October 20, 2015 (b)
S&P	B	BB+	Stable	October 12, 2016 (c)
DBRS	R-3	BBB (Low)	Stable	May 2, 2016 (d)

(a) Fitch affirmed our senior unsecured debt rating of BB+, affirmed our short-term rating of B, and maintained a Stable outlook on September 28, 2016.

(b) Moody's upgraded our senior unsecured debt rating to Ba3 from B1, affirmed our short-term rating of Not Prime, and changed the outlook to Stable on October 20, 2015. Effective December 1, 2014, we determined to not renew our contractual arrangement with Moody's related to their providing of our corporate family, senior debt, and short-term ratings. Notwithstanding this, Moody's has determined to continue to provide these ratings on a discretionary basis. However, Moody's has no obligation to continue to provide these ratings, and could cease doing so at any time.

(c) Standard & Poor's affirmed our senior unsecured debt rating of BB+, affirmed our short-term rating of B, and changed the outlook from Positive to Stable on October 12, 2016.

(d) DBRS upgraded our short-term rating to R-3 from R-4, upgraded our senior unsecured debt rating to BBB (Low) from BB (High), and changed the outlook to Stable on all ratings on May 2, 2016.

Off-balance Sheet Arrangements

Refer to Note 9 to the Condensed Consolidated Financial Statements.

Critical Accounting Estimates

We identified critical accounting estimates that, as a result of judgments, uncertainties, uniqueness, and complexities of the underlying accounting standards and operations involved could result in material changes to our financial condition, results of operations, or cash flows under different conditions or using different assumptions.

Our most critical accounting estimates are as follows.

• Allowance for loan losses

• Valuation of automotive lease assets and residuals

• Fair value of financial instruments

• Legal and regulatory reserves

• Determination of provision for income taxes

During 2016, we did not substantively change any material aspect of our overall methodologies and processes used in developing the above estimates from what was described in our Annual Consolidated Financial Statements.

Refer to Note 1 to the Condensed Consolidated Financial Statements for further discussion regarding the methodology used in calculating the provision for income taxes for interim financial reporting.

105

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Statistical Table

The accompanying supplemental information should be read in conjunction with the more detailed information, including our Condensed Consolidated Financial Statements and the Notes thereto, which appears elsewhere in this Quarterly Report.

Net Interest Margin Table

The following table presents an analysis of net yield on interest-earning assets (or net interest margin) excluding discontinued operations for the periods shown.

	2016							2015							(Decrease) increase due to
Three months ended September 30, ($ in millions)	Average balance (a)			Interest income/ Interest expense		Yield/rate		Average balance (a)			Interest income/ Interest expense		Yield/rate		Volume			Yield/rate			Total
Assets
Interest-bearing cash and cash equivalents	$	2,530		$	3	0.47	%	$	3,667		$	2	0.22	%	$	(1	)	$	2		$	1
Investment securities (b)	17,550			97		2.20		17,745			95		2.12		(1		)	3			2
Loans held-for-sale, net	1			—		—		111			2		7.15		(2		)	—			(2		)
Finance receivables and loans, net (c) (d)	113,294			1,307		4.59		105,604			1,166		4.38		85			56			141
Investment in operating leases, net (e)	13,232			241		7.25		17,519			302		6.84		(74		)	13			(61		)
Total interest-earning assets	146,607			1,648		4.47		144,646			1,567		4.30		7			74			81
Noninterest-bearing cash and cash equivalents	1,369							1,563
Other assets	9,353							9,665
Allowance for loan losses	(1,103		)					(988		)
Total assets	$	156,226						$	154,886
Liabilities
Interest-bearing deposit liabilities	$	74,166		$	212	1.14	%	$	62,791		$	181	1.14	%	$	33		$	(2	)	$	31
Short-term borrowings	5,194			14		1.07		6,745			13		0.76		(3		)	4			1
Long-term debt (d)	58,425			430		2.93		66,857			410		2.43		(52		)	72			20
Total interest-bearing liabilities	137,785			656		1.89		136,393			604		1.76		(22		)	74			52
Noninterest-bearing deposit liabilities	97							91
Total funding sources	137,882			656		1.89		136,484			604		1.76
Other liabilities	4,674							3,971
Total liabilities	142,556							140,455
Total equity	13,670							14,431
Total liabilities and equity	$	156,226						$	154,886
Net financing revenue (f)				$	992						$	963			$	29		$	—		$	29
Net interest spread (g)						2.58	%						2.54	%
Net yield on interest-earning assets (h)						2.69	%						2.64	%

(a) Average balances are calculated using a combination of monthly and daily average methodologies.

(b) Excludes equity investments with an average balance of $589 million and $1,014 million at September 30, 2016, and 2015, respectively, and related income on equity investments of $4 million and $7 million for the three months endedSeptember 30, 2016, and 2015, respectively. Yields on available-for-sale debt securities are based on fair value as opposed to amortized cost.

(c) Nonperforming finance receivables and loans are included in the average balances. For information on our accounting policies regarding nonperforming status, refer to Note 1 to the Annual Consolidated Financial Statements.

(d) Includes the effects of derivative financial instruments designated as hedges.

(e) Includes gains on sale of $62 million and $105 million for the three months endedSeptember 30, 2016, and 2015, respectively. Excluding these gains on sale, the annualized yield would be 5.38% and 4.44% at September 30, 2016, and 2015, respectively.

(f) Excludes income on equity investments of $4 million and $7 million for the three months endedSeptember 30, 2016, and 2015, respectively.

(g) Net interest spread represents the difference between the rate on total interest-earning assets and the rate on total interest-bearing liabilities.

(h) Net yield on interest-earning assets represents net financing revenue as a percentage of total interest-earning assets.

106

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

	2016							2015							(Decrease) increase due to
Nine months ended September 30,                   ($ in millions)	Average balance (a)			Interest income/ Interest expense		Yield/rate		Average balance (a)			Interest income/ Interest expense		Yield/rate		Volume			Yield/rate			Total
Assets
Interest-bearing cash and cash equivalents	$	2,700		$	10	0.49	%	$	4,025		$	6	0.20	%	$	(2	)	$	6		$	4
Federal funds sold and securities purchased under resale agreements	1			—		—		3			—		—		—			—			—
Investment securities (b)	17,325			289		2.23		16,916			264		2.09		6			19			25
Loans held-for-sale, net	12			—		—		1,177			40		4.54		(40		)	—			(40		)
Finance receivables and loans, net (c) (d)	112,332			3,807		4.53		102,161			3,358		4.39		334			115			449
Investment in operating leases, net (e)	14,412			767		7.11		18,474			873		6.32		(192		)	86			(106		)
Total interest-earning assets	146,782			4,873		4.43		142,756			4,541		4.25		106			226			332
Noninterest-bearing cash and cash equivalents	1,515							1,574
Other assets	9,468							9,577
Allowance for loan losses	(1,084		)					(970		)
Total assets	$	156,681						$	152,937
Liabilities
Interest-bearing deposit liabilities	$	71,286		$	608	1.14	%	$	61,142		$	530	1.16	%	$	88		$	(10	)	$	78
Short-term borrowings	5,445			39		0.96		6,362			36		0.76		(5		)	8			3
Long-term debt (d)	61,318			1,308		2.85		66,078			1,258		2.55		(91		)	141			50
Total interest-bearing liabilities	138,049			1,955		1.89		133,582			1,824		1.83		(8		)	139			131
Noninterest-bearing deposit liabilities	94							82
Total funding sources	138,143			1,955		1.89		133,664			1,824		1.82
Other liabilities	4,873							4,352
Total liabilities	143,016							138,016
Total equity	13,665							14,921
Total liabilities and equity	$	156,681						$	152,937
Net financing revenue (f)				$	2,918						$	2,717			$	114		$	87		$	201
Net interest spread (g)						2.54	%						2.42	%
Net yield on interest-earning assets (h)						2.66	%						2.54	%

(a) Average balances are calculated using a combination of monthly and daily average methodologies.

(b) Excludes equity investments with an average balance of $652 million and $967 million at September 30, 2016, and 2015, respectively, and related income on equity investments of $13 million and $19 million for the nine months ended September 30, 2016, and 2015, respectively. Yields on available-for-sale debt securities are based on fair value as opposed to amortized cost. Yields on held-to-maturity debt securities are based on amortized cost.

(c) Nonperforming finance receivables and loans are included in the average balances. For information on our accounting policies regarding nonperforming status, refer to Note 1 to the Annual Consolidated Financial Statements.

(d) Includes the effects of derivative financial instruments designated as hedges.

(e) Includes gains on sale of $203 million and $282 million for the nine months ended September 30, 2016, and 2015, respectively. Excluding these gains on sale, the annualized yield would be 5.23% and 4.27% at September 30, 2016, and 2015, respectively.

(f) Excludes income on equity investments of $13 million and $19 million for the nine months ended September 30, 2016, and 2015, respectively.

(g) Net interest spread represents the difference between the rate on total interest-earning assets and the rate on total interest-bearing liabilities.

(h) Net yield on interest-earning assets represents net financing revenue as a percentage of total interest-earning assets.

107

Management's Discussion and Analysis

Ally Financial Inc. • Form 10-Q

Recently Issued Accounting Standards

Refer to Note 1 to the Condensed Consolidated Financial Statements.

Forward-looking Statements

The foregoing Management’s Discussion and Analysis of Financial Condition and Results of Operations and other portions of this Form 10-Q contain various forward-looking statements within the meaning of applicable federal securities laws.

The words “expect,” “anticipate,” “estimate,” “forecast,” “initiative,” “objective,” “plan,” “goal,” “project,” “outlook,” “priorities,” “target,” “intend,” “evaluate,” “pursue,” “seek,” “may,” “would,” “could,” “should,” “believe,” “potential,” “continue,” or the negative of any of these words or similar expressions are intended to identify forward-looking statements. All statements herein, other than statements of historical fact, including without limitation statements about future events and financial performance, are forward-looking statements that involve certain risks and uncertainties.

While these statements represent our current judgment on what the future may hold, and we believe these judgments are reasonable, these statements are not guarantees of any events or financial results, and Ally's actual results may differ materially. You should not place undue reliance on any forward-looking statement and should consider all uncertainties and risks described in the most recent reports on Securities and Exchange Commission (SEC) Forms 10-K and 10-Q for Ally, or discussed in this report, including those under Item 1A, Risk Factors, as well as those provided in any subsequent SEC filings. Forward-looking statements apply only as of the date they are made, and Ally undertakes no obligation to update any forward-looking statement to reflect events or circumstances that arise after the date the forward-looking statement are made. Such factors include, among others, the following: maintaining the mutually beneficial relationship between Ally and GM, and Ally and Chrysler, and our ability to further diversify our business; our ability to maintain relationships with automotive dealers; the significant regulation and restrictions that we are subject to as a BHC and a FHC; the potential for deterioration in the residual value of off-lease vehicles; disruptions in the market in which we fund our operations, with resulting negative impact on our liquidity; changes in our accounting assumptions that may require or that result from changes in the accounting rules or their application, which could result in an impact on earnings; changes in our credit ratings; changes in economic conditions, currency exchange rates or political stability in the markets in which we operate; and changes in the existing or the adoption of new laws, regulations, policies or other activities of governments, agencies and similar organizations (including as a result of the Dodd-Frank Act and Basel III).

Use of the term “loans” describes products associated with direct and indirect lending activities of Ally’s operations. The specific products include retail installment sales contracts, lines of credit, leases or other financing products. The term “originate” refers to Ally’s purchase, acquisition or direct origination of various “loan” products.

Item 3.    Quantitative and Qualitative Disclosures about Market Risk

Refer to the Market Risk Management section of Item 2, Management's Discussion and Analysis.

108

Controls and Procedures

Ally Financial Inc. • Form 10-Q

Item 4.    Controls and Procedures

We maintain disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the Exchange Act), designed to ensure that information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized, and reported within the specified time periods. Our disclosure controls and procedures are also designed to ensure that information required to be disclosed in the reports we file and submit under the Exchange Act is accumulated and communicated to management, including our Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), to allow timely decisions regarding required disclosure.

As of the end of the period covered by this report, our Principal Executive Officer and Principal Financial Officer evaluated, with the participation of our management, the effectiveness of our disclosure controls and procedures and concluded that our disclosure controls and procedures were effective.

There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) that occurred during our most recent fiscal quarter that materially affected, or were reasonably likely to materially affect, our internal control over financial reporting.

Our management, including our Principal Executive Officer and Principal Financial Officer, does not expect that our disclosure controls or our internal controls will prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system's objectives will be met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within Ally have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with associated policies or procedures. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

109

PART II — OTHER INFORMATION

Ally Financial Inc. • Form 10-Q

Item 1.    Legal Proceedings

Refer to Note 26 to the Condensed Consolidated Financial Statements (incorporated herein by reference) for a discussion related to our legal proceedings.

Item 1A.    Risk Factors

There have been no material changes to the Risk Factors described in our Annual Consolidated Financial Statements.

Item 2.    Unregistered Sales of Equity Securities and Use of Proceeds

We did not have any unregistered sales of equity securities during the three months endedSeptember 30, 2016.

Purchases of Equity Securities by the Issuer

The following table presents repurchases of our common stock, by month, for the three months endedSeptember 30, 2016.

Three months ended September 30, 2016	Total number of shares repurchased (a)	Weighted-average price paid per share (a) (b) (in dollars)		Total number of shares repurchased as part of publicly announced program (a) (c)	Maximum approximate dollar value of shares that may yet be repurchased under the program (a) (b) (c) ($ in millions)
July 2016	202,242	$	17.83	202,242	$	696
August 2016	5,184,524	19.09		5,184,524	597
September 2016	2,910,887	19.42		2,910,887	541
Total	8,297,653	19.18		8,297,653

(a) Includes shares of common stock withheld to cover income taxes owed by participants in our share-based incentive plans.

(b) Excludes brokerage commissions.

(c) On July 19, 2016, we announced a common stock repurchase program of up to $700 million. The program commenced in the third quarter of 2016 and will expire on June 30, 2017.

Item 3.    Defaults upon Senior Securities

None.

Item 4.    Mine Safety Disclosures

Not applicable.

Item 5.    Other Information

None.

Item 6.    Exhibits

The exhibits listed on the accompanying Index of Exhibits are filed as a part of this report. This Index is incorporated herein by reference.

110

Signatures

Ally Financial Inc. • Form 10-Q

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, this 2nd day of November, 2016.

Ally Financial Inc.

(Registrant)

/S/CHRISTOPHER A.HALMY

Christopher A. Halmy

Chief Financial Officer

/S/DAVID J. DEBRUNNER

David J. DeBrunner

Vice President, Chief Accounting Officer, and

Corporate Controller

111

Ally Financial Inc. • Form 10-Q

INDEX OF EXHIBITS

Exhibit	Description	Method of Filing
12	Computation of Ratio of Earnings to Fixed Charges	Filed herewith.
31.1	Certification of Principal Executive Officer pursuant to Rule 13a-14(a)/15d-14(a)	Filed herewith.
31.2	Certification of Principal Financial Officer pursuant to Rule 13a-14(a)/15d-14(a)	Filed herewith.
32	Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350	Filed herewith.
101	Interactive Data File	Filed herewith.

112

EX-12

Exhibit 12

Ally Financial Inc.

Ratio of Earnings to Fixed Charges

	Nine months ended September 30,			Year ended December 31,
($ in millions)	2016 (a)			2015 (a)			2014 (a)			2013 (a)			2012 (a)			2011 (a)
Earnings
Consolidated net income (loss) from continuing operations	$	865		$	897		$	925		$	416		$	1,370		$	(219	)
Income tax expense (benefit) from continuing operations	336			496			321			(59		)	(856		)	42
Equity-method investee earnings	(14		)	(52		)	(18		)	(15		)	(6		)	(7		)
Minority interest expense	—			—			—			—			1			1
Consolidated income (loss) from continuing operations before income taxes, minority interest, and income from equity investees	1,187			1,341			1,228			342			509			(183		)
Fixed charges	1,964			2,460			2,826			3,344			4,031			4,668
Earnings available for fixed charges	$	3,151		$	3,801		$	4,054		$	3,686		$	4,540		$	4,485
Fixed charges
Interest, discount, and issuance expense on debt	$	1,951		$	2,443		$	2,810		$	3,330		$	4,014		$	4,652
Portion of rentals representative of the interest factor	13			17			16			15			17			16
Total fixed charges	1,964			2,460			2,826			3,345			4,031			4,668
Preferred dividend requirements (b)	42			3,991			361			1,049			801			763
Total fixed charges and preferred dividend requirements	$	2,006		$	6,451		$	3,187		$	4,394		$	4,832		$	5,431
Ratio of earnings to fixed charges (c)	1.60			1.55			1.43			1.10			1.13			0.96
Ratio of earnings to fixed charges and preferred dividend requirements (d)	1.57			0.59			1.27			0.84			0.94			0.83

(a) During 2013 and 2012, certain disposal groups met the criteria to be presented as discontinued operations. For all periods presented, the operating results for these operations have been removed from continuing operations. We report these businesses separately as discontinued operations in the Condensed Consolidated Financial Statements. Refer to Note 3 to the Condensed Consolidated Financial Statements for further discussion of our discontinued operations. All reported periods of the calculation of the ratio of earnings to fixed charges exclude discontinued operations.

(b) Amount for 2015 includes a $1,185 million reduction (increase) to retained earnings (accumulated deficit) related to a redemption of our Series G Preferred Stock in April 2015, a $22 million reduction (increase) to retained earnings (accumulated deficit) related to a repurchase of our Series A Preferred shares in May 2015, and a $1,178 million reduction (increase) to retained earnings (accumulated deficit) related to the redemption of our remaining Series G Preferred Stock in December 2015. Amount for 2013 includes a $240 million reduction to retained earnings (accumulated deficit) related to a repurchase of mandatorily convertible preferred stock held by U.S. Department of Treasury and elimination of share adjustment right on November 20, 2013. Effective May 16, 2016, we redeemed the remaining shares outstanding of our Series A Preferred Stock.

(c) The ratio indicates a less than one-to-one coverage for the year ended December 31, 2011. Earnings available for fixed charges for the year ended December 31, 2011 were inadequate to cover fixed charges. The deficient amount for the ratio was $183 million for the year ended December 31, 2011.

(d) The ratio indicates a less than one-to-one coverage for the years ended December 31, 2015, 2013, 2012, and 2011. Earnings available for fixed charges and preferred dividend requirements for the years ended December 31, 2015, 2013, 2012, and 2011, were inadequate to cover total fixed charges and preferred dividend requirements. The deficient amounts for the ratio were $2,650 million, $708 million, $292 million, and $946 million for the years ended December 31, 2015, 2013, 2012, and 2011, respectively.

EX-31.1

Exhibit 31.1

Ally Financial Inc. 

I, Jeffrey J. Brown, certify that:

1. I have reviewed this report on Form 10-Q of Ally Financial Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a–15(e) and 15d–15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a–15(f) and 15d–15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2016

/S/JEFFREY J. BROWN

Jeffrey J. Brown

Chief Executive Officer

EX-31.2

Exhibit 31.2

Ally Financial Inc.

I, Christopher A. Halmy, certify that:

1. I have reviewed this report on Form 10-Q of Ally Financial Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a–15(e) and 15d–15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a–15(f) and 15d–15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2016

/S/CHRISTOPHER A. HALMY

Christopher A. Halmy

Chief Financial Officer

EX-32

Exhibit 32

Ally Financial Inc.

Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350

In connection with the Annual Report of Ally Financial Inc. (the Company) on Form 10-Q for the period ending September 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the Report), each of the undersigned officers of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of their knowledge:

1. The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/S/ JEFFREY J. BROWN

Jeffrey J. Brown

Chief Executive Officer

November 2, 2016

/S/ CHRISTOPHER A. HALMY

Christopher A. Halmy

Chief Financial Officer

November 2, 2016

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Ally Financial Inc. and will be furnished to the Securities and Exchange Commission or its staff upon request.

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Document and Entity Information - USD ($)	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016	Jun. 30, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	Ally Financial Inc.
Entity Central Index Key	0000040729
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		471,597,537
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 9,874,447,499

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Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Revenue and Other Interest Income [Abstract]
Interest and Fee Income, Loans and Leases	$ 1,307	$ 1,166	$ 3,807	$ 3,358
Interest and Fee Income, Loans and Leases Held-for Sale	0	2	0	40
Interest and Dividend Income, Securities, Operating, Available-for-sale	101	102	302	283
Interest Income, Deposits with Financial Institutions	3	2	10	6
Operating Leases, Income Statement, Lease Revenue	649	830	2,119	2,586
Total financing revenue and other interest income	2,060	2,102	6,238	6,273
Interest Expense [Abstract]
Interest Expense, Deposits	212	181	608	530
Interest Expense, Short-term Borrowings	14	13	39	36
Interest Expense, Long-term Debt	430	410	1,308	1,258
Interest Expense	656	604	1,955	1,824
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	408	528	1,352	1,713
Net Financing Revenue	996	970	2,931	2,736
Other revenue [Abstract]
Insurance Services Revenue	238	236	704	706
Gain (Loss) on Sales of Loans, Net	0	(2)	4	45
Gain (Loss) on Extinguishment of Debt	0	0	(4)	(354)
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	52	6	145	106
Noninterest Income, Other Operating Income	98	92	289	283
Nonoperating Income (Expense)	388	332	1,138	786
Revenues	1,384	1,302	4,069	3,522
Provision for Loan Losses Expensed	258	211	650	467
Noninterest Expense [Abstract]
Labor and Related Expense	248	235	742	726
Policyholder Benefits and Claims Incurred, Net	69	61	287	239
Other Noninterest Expense	418	378	1,189	1,128
Noninterest Expense	735	674	2,218	2,093
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	391	417	1,201	962
Income Tax Expense (Benefit)	130	144	336	341
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	261	273	865	621
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(52)	(5)	(46)	405
Net Income (Loss) Attributable to Parent	209	268	819	1,026
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4)	61	262	(56)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 205	$ 329	$ 1,081	$ 970
Earnings Per Share, Basic [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.54	$ 0.49	$ 1.73	$ (1.52)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.11)	(0.01)	(0.10)	0.84
Earnings Per Share, Basic	0.43	0.48	1.63	(0.68)
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share	0.54	0.49	1.72	(1.52)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.11)	(0.01)	(0.10)	0.84
Earnings Per Share, Diluted	0.43	0.47	1.63	(0.68)
Common Stock, Dividends, Per Share, Declared	$ 0.08	$ 0	$ 0.08	$ 0.00

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Consolidated Balance Sheet & Mini Balance Sheet - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Assets [Abstract]
Cash and Due from Banks	$ 1,779	$ 2,148
Interest-bearing Deposits in Banks and Other Financial Institutions	2,510	4,232
Cash and Cash Equivalents, at Carrying Value	4,289	6,380
Available-for-sale securities	17,701	17,157
Held-to-maturity securities	649	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Finance receivables and loans, net [Abstract]
Loans and Leases Receivable, Gross	114,959	111,600
Loans and Leases Receivable, Allowance	(1,134)	(1,054)
Loans and Leases Receivable, Net Amount	113,825	110,546
Property Subject to or Available for Operating Lease, Net	12,689	16,271
Premiums receivable and other insurance assets	1,881	1,801
Other assets	6,307	6,321
Assets	157,397	158,581
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	101	89
Interest-bearing deposit liabilities	75,643	66,389
Deposits	75,744	66,478
Short-term Debt	6,434	8,101
Long-term debt	56,836	66,234
Interest payable	462	350
Unearned Premiums	2,493	2,434
Accounts Payable and Accrued Liabilities	1,798	1,545
Liabilities	143,767	145,142
Equity [Abstract]
Common Stocks, Including Additional Paid in Capital, Net of Discount	21,149	21,100
Non U S Dept Of Treasury Held Preferred Stock And APIC	0	696
Retained Earnings (Accumulated Deficit)	(7,361)	(8,110)
Accumulated Other Comprehensive Income (Loss), Net of Tax	31	(231)
Treasury stock, Value	(189)	(16)
Stockholders' Equity Attributable to Parent, Total	13,630	13,439
Liabilities and Equity	157,397	158,581
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Loans and Leases Receivable, Gross	26,009	27,929
Loans and Leases Receivable, Allowance	(193)	(196)
Loans and Leases Receivable, Net Amount	25,816	27,733
Property Subject to or Available for Operating Lease, Net	2,337	4,791
Other assets	1,189	1,624
Assets	29,342	34,148
Liabilities and Equity [Abstract]
Long-term debt	15,985	20,267
Accounts Payable and Accrued Liabilities	14	22
Liabilities	$ 15,999	$ 20,289

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Consolidated Balance Sheet and Mini Balance Sheet (Paranthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,100,000,000	1,100,000,000
Common Stock, Shares, Issued	485,431,852	482,790,696
Common Stock, Shares, Outstanding	475,469,882	481,980,111
Treasury Stock, Shares	9,961,970	810,585

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Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Common stock and paid-in capital [Member]	Preferred stock [Member]	Accumulated deficit [Member]	Accumulated other comprehensive (loss) income [Member]	Treasury stock [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (66)				$ (66)
Stockholders' Equity Attributable to Parent, Total at Dec. 31, 2014	15,399	$ 21,038	$ 1,255	$ (6,828)		$ 0
Net Income (Loss) Attributable to Parent	1,026			1,026
Dividends, Preferred Stock, Cash	(1,356)			(1,356)
Stock Repurchased During Period, Value	(325)		(325)
Preferred stock redemption	(117)		(117)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	44	44
Other Comprehensive Income (Loss), Net of Tax	(56)				(56)
Treasury Stock, Value, Acquired, Cost Method	(16)					(16)
Stockholders' Equity Attributable to Parent, Total at Sep. 30, 2015	14,599	21,082	813	(7,158)		(16)
Stock Repurchase and Redemption Premium	1,193
Accumulated Other Comprehensive Income (Loss), Net of Tax	(122)				(122)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(231)				(231)
Stockholders' Equity Attributable to Parent, Total at Dec. 31, 2015	13,439	21,100	696	(8,110)		(16)
Net Income (Loss) Attributable to Parent	819
Dividends, Preferred Stock, Cash	(30)			(30)
Stock Repurchased During Period, Value	(696)		(696)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	49	49
Other Comprehensive Income (Loss), Net of Tax	262				262
Treasury Stock, Value, Acquired, Cost Method	(173)					(173)
Dividends, Common Stock, Cash	(40)			(40)
Stockholders' Equity Attributable to Parent, Total at Sep. 30, 2016	13,630	$ 21,149	$ 0	$ (7,361)		$ (189)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 31				$ 31

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Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss) Attributable to Parent	$ 819	$ 1,026
Depreciation, Amortization and Accretion, Net	1,807	2,130
Provision for Loan Losses Expensed Including Discontinued Operations	650	467
Gain Loss on Sales of Loans Net Including Discontinued Operations	(4)	(45)
Availableforsale Securities Gross Realized Gain Loss Excluding Otti Including Disc Ops	(145)	(106)
Gain (Loss) on Extinguishment of Debt	4	354
Payments for Origination and Purchases of Loans Held-for-sale	(141)	(1,594)
Proceeds from Sale of Loans Held-for-sale	184	1,580
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	(452)
Increase (Decrease) in Deferred Income Taxes	322	406
Increase (Decrease) in Interest Payable, Net	112	(40)
Increase (Decrease) in Other Operating Assets	16	528
Increase (Decrease) in Other Operating Liabilities	(65)	(212)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	30	(72)
Net cash provided by (used in) operating activities	3,589	3,970
Net Cash Provided by Investing Activities [Abstract]
Payments to Acquire Available-for-sale Securities	(11,027)	(10,011)
Proceeds from sales of available-for-sale securities	8,546	4,408
Proceeds from maturities and repayment of available-for-sale securities	2,411	3,141
Payments to Acquire Held-to-maturity Securities	(650)	0
Payments for (Proceeds from) Loans and Leases	(8,308)	(9,175)
Proceeds from Sale of Loans Held-for-investment	4,221	2,665
Purchases of operating lease assets	(2,360)	(3,423)
Disposals of operating lease assets	4,631	3,855
Payments to Acquire Interest in Subsidiaries and Affiliates	(309)	0
Proceeds from Divestiture of Businesses	0	1,049
Increase (Decrease) in Restricted Cash	622	489
Increase (Decrease) in Non marketable equity securities	(401)	(42)
Payments for (Proceeds from) Other Investing Activities	(157)	25
Net cash provided by investing activities	(2,781)	(7,019)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from (Repayments of) Short-term Debt	(1,673)	(1,692)
Increase (Decrease) in Deposits	9,240	5,797
Proceeds from issuance of long-term debt	11,229	23,866
Repayments of long-term debt	(20,758)	(23,454)
Payments for Repurchase of Redeemable Preferred Stock	(696)	(442)
Payments for Repurchase of Common Stock	(173)	(16)
Payments of Dividends	(70)	(1,356)
Net cash (used in) provided by financing activities	(2,901)	2,703
Effect of exchange-rate changes on cash and cash equivalents	2	(3)
Cash and Cash Equivalents, Period Increase (Decrease)	(2,091)	(349)
Cash and Cash Equivalents, at Carrying Value	6,380	5,576
Cash and Cash Equivalents, at Carrying Value	4,289	5,227
Supplemental Cash Flow Information [Abstract]
Interest Paid	1,860	1,825
Income Taxes Paid	16	95
Transfer of Portfolio Loans and Leases to Held-for-sale	4,231	777
Proceeds from sales and repayments of mortgage loans held-for-investment originally designated as held-for-sale	$ 28	$ 61

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Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]

Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies

Ally Financial Inc. (referred to herein as Ally, Parent, we, our, or us) is a leading digital financial services company offering financial products for consumers, businesses, automotive dealers and corporate clients. Founded in 1919, we have over 95 years of experience providing a broad array of financial products and services. We operate as a financial holding company (FHC) and a bank holding company (BHC). Our banking subsidiary, Ally Bank, is an award-winning online bank, and an indirect, wholly-owned subsidiary of Ally Financial Inc. with a distinct brand and relentless focus on customers, offering a variety of deposit and other banking products.

Our accounting and reporting policies conform to accounting principles generally accepted in the United States of America (GAAP). Additionally, where applicable, the policies conform to the accounting and reporting guidelines prescribed by bank regulatory authorities. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and that affect income and expenses during the reporting period and related disclosures. In developing the estimates and assumptions, management uses all available evidence; however, actual results could differ because of uncertainties associated with estimating the amounts, timing, and likelihood of possible outcomes.

The Condensed Consolidated Financial Statements at September 30, 2016, and for the three months and nine months endedSeptember 30, 2016, and 2015, are unaudited but reflect all adjustments that are, in management’s opinion, necessary for the fair presentation of the results for the interim periods presented. All such adjustments are of a normal recurring nature, except for within the Condensed Consolidated Statement of Cash Flows and related disclosures in Note 25 to the Condensed Consolidated Financial Statements, where an immaterial amount related to the repurchase of common stock for the period ended September 30, 2015, was reclassified from operating activities to financing activities to appropriately present the prior period amounts.

These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements (and the related Notes) included in our Annual Report on Form 10-K for the year ended December 31, 2015, as filed on February 24, 2016, with the U.S. Securities and Exchange Commission (SEC), as amended by the Current Report on Form 8-K filed with the SEC on May 5, 2016 (referred to herein as the Annual Consolidated Financial Statements).

Change in Reportable Segments

As a result of a change in how management views and operates our business, during the first quarter of 2016, we made changes in the composition of our operating segments. Financial information related to our Corporate Finance business is presented as a separate reportable segment. Previously, all such activity was included in Corporate and Other. Additionally, only the activity of our ongoing bulk acquisitions of mortgage loans and other originations and refinancing is presented in Mortgage Finance operations. The activity related to the management of our legacy mortgage portfolio is included in Corporate and Other. Our other operating segments, Automotive Finance operations and Insurance operations, were unchanged. Amounts for 2015 have been adjusted to conform to the current management view.In connection with the change in operating segments, we defined additional classes of finance receivables and loans: Mortgage Finance and Mortgage — Legacy. Mortgage Finance includes consumer mortgage loans from our ongoing mortgage operations and Mortgage — Legacy includes consumer mortgage loans originated prior to 2009.

Significant Accounting Policies

Business Combinations

We account for our business acquisitions using the acquisition method of accounting. Under this method we generally record the initial carrying values of purchased assets, including identifiable intangible assets, and assumed liabilities at fair value on the acquisition date. We recognize goodwill when the acquisition price is greater than the fair value of the net assets acquired, including identifiable intangible assets. The initial fair value of recognized assets and liabilities are subject to refinement during the measurement period, a period up to one year after the closing date of an acquisition, as information relative to closing date fair values becomes available. Costs directly related to business combinations are recorded as expenses as they are incurred.

Goodwill and Other Intangibles

Goodwill and intangible assets, net of accumulated amortization, are reported in other assets.

Our intangible assets primarily consist of acquired customer relationships and developed technology, and are amortized using a straight line methodology over their estimated useful lives. We review intangible assets for impairment at least annually, or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If it is determined the carrying amount of the asset is not recoverable, an impairment charge is recorded. Refer to Note 2 for further discussion on intangible assets.

Goodwill represents the excess of the cost of an acquisition over the fair value of net assets acquired, including identifiable intangibles. We allocate goodwill to applicable reporting units based on the relative fair value of other net assets allocated to those reporting units at the time of the acquisition. In the event we restructure our business, we may reallocate goodwill. We test goodwill for impairment annually, or more frequently if events and changes in circumstances indicate that it is more likely than not that impairment exists. Our annual goodwill impairment test is performed as of August 31 of each year. In certain situations, we may perform a qualitative assessment to test goodwill for impairment. We may also decide to bypass the qualitative assessment and perform a quantitative assessment. If we perform the qualitative assessment to test goodwill for impairment and conclude that it is more likely than not that the reporting unit’s fair value is greater than its carrying value, then the quantitative assessment is not required. However, if we perform the qualitative assessment and determine that is it more likely than not that a reporting unit’s fair value is less than its carrying value, then we must perform the quantitative assessment. The quantitative assessment uses a two-step process. The first step of the assessment requires us to compare the fair value of each of the reporting units to their respective carrying value. The fair value of the reporting units in our quantitative assessment is determined based on various analyses including discounted cash flow projections using assumptions a market participant would use. If the carrying value is less than the fair value, no impairment exists, and the second step does not need to be completed. If the carrying value is higher than the fair value or there is an indication that impairment may exist, a second step must be performed where we determine the implied value of goodwill based on the individual fair values of the reporting unit's assets and liabilities, including unrecognized intangibles, to compute the amount of the impairment. Refer to Note 2 for further discussion on goodwill.

Income Taxes

In calculating the provision for interim income taxes, in accordance with Accounting Standards Codification (ASC) 740, Income Taxes, we apply an estimated annual effective tax rate to year-to-date ordinary income. At the end of each interim period, we estimate the effective tax rate expected to be applicable for the full fiscal year. This method differs from that described in Note 1 to the Annual Consolidated Financial Statements, which describes our annual significant income tax accounting policy and related methodology.

Investments

Our portfolio of investments includes various debt and marketable equity securities and nonmarketable equity investments. Debt and marketable equity securities are classified based on management’s intent to sell or hold the security. We classify debt securities as held-to-maturity only when we have both the intent and ability to hold the securities to maturity. We classify debt and marketable equity securities as trading when the securities are acquired for the purpose of selling or holding them for a short period of time. Securities not classified as either held-to-maturity or trading are classified as available-for-sale.

Our debt and marketable equity securities include government securities, corporate bonds, asset-backed securities (ABS), mortgage-backed securities (MBS), equity securities and other investments. Our portfolio includes securities classified as available-for-sale and held-to-maturity. Our available-for-sale securities are carried at fair value with unrealized gains and losses included in accumulated other comprehensive income or loss and are subject to impairment. Our held-to-maturity securities are carried at amortized cost and are subject to impairment.

We amortize premiums and discounts on debt securities as an adjustment to investment yield generally over the stated maturity of the security. For ABS and MBS where prepayments can be reasonably estimated, amortization is adjusted for expected prepayments.

Additionally, we assess our debt and marketable equity securities for potential other-than-temporary impairment. We employ a methodology that considers available evidence in evaluating potential other-than-temporary impairment of our debt and marketable equity securities classified as available-for-sale and held-to-maturity. If the cost of an investment exceeds its fair value, we evaluate, among other factors, the magnitude and duration of the decline in fair value. We also evaluate the financial health of and business outlook for the issuer, the performance of the underlying assets for interests in securitized assets, and, for securities classified as available-for-sale, our intent and ability to hold the investment through recovery of its amortized cost basis.

Once a decline in fair value of a debt security is determined to be other-than-temporary, an impairment charge for the credit component is recorded to other gain (loss) on investments, net, in our Consolidated Statement of Income, and a new cost basis in the investment is established. The noncredit loss component of a debt security is recorded in other comprehensive income (loss) when we do not intend to sell the security and it is not more likely than not that we will have to sell the security prior to the security's anticipated recovery. The credit and noncredit loss components are recorded in earnings when we intend to sell the security or it is more likely than not that we will have to sell the security prior to the security’s anticipated recovery. Unrealized losses that we have determined to be other-than-temporary on equity securities are recorded to other gain (loss) on investments, net in our Consolidated Statement of Income. Subsequent increases and decreases to the fair value of available-for-sale debt and equity securities are included in other comprehensive income (loss), so long as they are not attributable to another other-than-temporary impairment.

Realized gains and losses on investment securities are reported in other gain (loss) on investments, net, and are determined using the specific identification method. For information on our debt and marketable equity securities, refer to Note 6.

In addition to our investments in debt and marketable equity securities, we hold equity positions in other entities. These positions include Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock held to meet regulatory requirements, other equity investments that are not publicly traded and do not have a readily determinable fair value, equity investments in low income housing tax credits, and Community Reinvestment Act (CRA) equity investments. Our investments in FHLB and FRB stock and other equity investments are accounted for using the cost method of accounting. Our low income housing tax credit investments are accounted for using the proportionate amortization method of accounting for qualified affordable housing investments. Our CRA investments are accounted for using the equity method of accounting. Our FHLB and FRB stock and other equity investments carried at cost are included in nonmarketable equity investments in other assets. Our investments in low income housing tax credits and CRA are also included in other assets. As conditions warrant, we review our investments carried at cost for impairment and will adjust the carrying value of the investment if it is deemed to be impaired. No impairment was recognized in 2016 or 2015. For more information on our nonmarketable equity investments, refer to Note 22.

Refer to Note 1 to the Annual Consolidated Financial Statements regarding additional significant accounting policies.

Recently Adopted Accounting Standards

Consolidation — Amendments to the Consolidation Analysis (ASU 2015-02)

As of January 1, 2016, we adopted ASU (Accounting Standards Update) 2015-02. The amendments in this update modify the requirements of consolidation with respect to entities that are or are similar in nature to limited partnerships or are variable interest entities (VIEs). For entities that are or are similar to limited partnerships, the guidance clarifies the evaluation of kick-out rights, removes the presumption that the general partner will consolidate and generally states that such entities will be presumed to be VIEs unless proven otherwise. For VIEs, the guidance modifies the analysis related to the evaluation of servicing fees, excludes servicing fees that are deemed commensurate with the level of service required from the determination of the primary beneficiary and clarifies certain considerations related to the consolidation analysis when performing a related party assessment. The amendments in this guidance did not impact our historical VIE and consolidation conclusions. No adjustments to our consolidated financial statements were required as a result of the adoption of this guidance.

Recently Issued Accounting Standards

Revenue from Contracts with Customers (ASU 2014-09) and Revenue from Contracts with Customers — Deferral of the Effective Date (ASU 2015-14)

In May 2014, the Financial Accounting Standards Board (FASB) issued ASU 2014-09. The purpose of this guidance is to streamline and consolidate existing revenue recognition principles in GAAP and to converge revenue recognition principles with International Financial Reporting Standards (IFRS). The core principle of the amendments is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to receive in exchange for those goods or services. The amendments include a five step process for consideration of the main principle, guidance on the accounting treatment for costs associated with a contract, and disclosure requirements related to the revenue process. As originally issued, the amendments in ASU 2014-09 were to be effective beginning on January 1, 2017. However, in August 2015, the FASB issued ASU 2015-14, which deferred the effective date of the guidance until January 1, 2018, and permitted early adoption as of the original effective date in ASU 2014-09. The FASB created a transition resource group to work with stakeholders and clarify the new guidance as necessary. The FASB has issued and is anticipating issuing additional ASUs to provide clarifying guidance and implementation support for ASU 2014-09. Management will consider these additional ASUs when assessing the overall impact of ASU 2014-09. The amendments to the revenue recognition principles can be applied on adoption either through a full retrospective application or on a modified basis with a cumulative effect adjustment on the date of initial adoption with certain practical expedients. Management has determined certain contractual arrangements are in scope of this guidance and is reviewing those in scope in order to determine the impact of the adoption of this guidance.

Financial Instruments — Recognition and Measurement of Financial Assets (ASU 2016-01)

In January 2016, the FASB issued ASU 2016-01. The amendments in this update modify the requirements related to the measurement of certain financial instruments in the statement of financial condition and results of operation. For equity investments (other than investments accounted for using the equity method), entities must measure such instruments at fair value with changes in fair value recognized in net income. Changes in fair value for available-for-sale equity securities will no longer be recognized through other comprehensive income. Reporting entities may continue to elect to measure equity investments that do not have a readily determinable fair value at cost with adjustments for impairment and observable changes in price. In addition, for a liability (other than a derivative liability) that an entity measures at fair value, any change in fair value related to the instrument-specific credit risk, that is the entity’s own-credit, should be presented separately in other comprehensive income and not as a component of net income. The amendments are effective on January 1, 2018, with early adoption permitted solely for the provisions pertaining to instrument-specific credit risk for liabilities measured at fair value. The amendments must be applied on a modified retrospective basis with a cumulative effect adjustment as of the beginning of the fiscal year of initial adoption. Management is currently evaluating the impact of the amendments. However, we do expect additional volatility in our consolidated results of operations as a result of the requirement to measure equity investments at fair value with changes in the fair value recognized in net income upon adoption.

Leases (ASU 2016-02)

In February 2016, the FASB issued ASU 2016-02. The amendments in this update primarily replace the existing accounting requirements for operating leases for lessees. Lessee accounting requirements for finance leases and lessor accounting requirements for both operating leases and sales type and direct financing leases (both of which were previously referred to as capital leases) are largely unchanged. The amendments require the lessee of an operating lease to record a balance sheet gross-up upon lease commencement by recognizing a right-to-use asset and lease liability equal to the present value of the lease payments. The right-to-use asset and lease liability should be derecognized in a manner that effectively yields a straight line lease expense over the lease term. In addition to the changes to the lessee operating lease accounting requirements, the amendments also change the types of costs that can be capitalized related to a lease agreement for both lessees and lessors for all types of leases. The amendments also require additional disclosures for all lease types for both lessees and lessors. The amendments are effective on January 1, 2019, with early adoption permitted. The amendments must be applied on a modified retrospective basis with a cumulative adjustment to the beginning of the earliest fiscal year presented in the financial statements in the period of adoption. Management is currently evaluating the impact of these amendments. Upon adoption, we expect to record a gross up in our consolidated statement of financial position upon adoption reflecting our right-to-use asset and lease liability for our operating leases where we are the lessee (for example, our facility leases). We are currently reviewing our operating lease contracts where we are the lessee to determine the impact of the gross up and the changes to capitalizable costs. We are also reviewing our leases where we are the lessor to determine the impact of the changes to capitalizable costs.

Stock Compensation — Improvements to Employee Share-Based Payment Accounting (ASU 2016-09)

In March 2016, the FASB issued ASU 2016-09. The amendments in this update include changes to several aspects of share-based payment accounting. The amendments allow for an entity wide accounting policy election to either account for forfeitures as they occur or estimate the number of awards that are expected to vest. The amendments modify the tax withholding requirements to allow entities to withhold an amount up to the employee’s maximum individual statutory tax rates without resulting in a liability classification of the award as opposed to limiting the withholding to the minimum statutory tax rates. The amendments require that all excess tax benefits and tax deficiencies related to share-based payment awards should be recognized in income tax expense or benefit in the income statement in the period in which they occur. The amendments also address the classification and presentation of certain items on the cash flow statement. The amendments are effective on January 1, 2017, with early adoption permitted. The transition method varies depending on the specific amendment. We do not believe these amendments will have a material impact to the financial statements.

Financial Instruments — Credit Losses (ASU 2016-13)

In June 2016, the FASB issued ASU 2016-13. The amendments in this update introduce a new accounting model to measure credit losses for financial assets measured at amortized cost. Credit losses for financial assets measured at amortized cost should be determined based on the total current expected credit losses over the life of the financial asset or group of financial assets. In effect, the financial asset or group of financial assets should be presented at the net amount expected to be collected. Credit losses will no longer be measured as they are incurred for financial assets measured at amortized cost. The amendments also modify the accounting for available-for-sale debt securities whereby credit losses will be recorded through an allowance for credit losses rather than a write-down to the security’s cost basis, which allows for reversals of credit losses when estimated credit losses decline. Credit losses for available-for-sale debt securities should be measured in a manner similar to current GAAP. The amendments are effective on January 1, 2020, with early adoption permitted as of January 1, 2019. The amendments must be applied using a modified retrospective approach with a cumulative-effect adjustment through retained earnings as of the beginning of the fiscal year upon adoption. The new accounting model for credit losses represents a significant departure from existing GAAP, which will increase the allowance for credit losses with a resulting negative adjustment to retained earnings. Management is currently evaluating the impact of the amendments.

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Acquisition of TradeKing Acquisition of TradeKing

9 Months Ended

Sep. 30, 2016

Business Acquisition [Line Items]

Business Combination Disclosure [Text Block]

Acquisitions

On June 1, 2016, we acquired 100% of the equity of TradeKing Group, Inc. (TradeKing), a digital wealth management company with an online broker/dealer, digital portfolio management platform, and educational content. for $298 million in cash. TradeKing will operate as a wholly owned subsidiary of Ally. The addition of brokerage and wealth management is a natural extension of our online banking franchise, creating a full suite of financial products for savings and investments. We applied the acquisition method of accounting to this transaction, which generally requires the initial recognition of assets acquired, including identifiable intangible assets, and liabilities assumed at their respective fair value. Goodwill is recognized as the excess of the acquisition price after the recognition of the net assets, including the identifiable intangible assets. Beginning in June 2016, financial information related to TradeKing is included within Corporate and Other.

The following table summarizes the allocation of cash consideration paid for TradeKing and the amounts of the identifiable assets acquired and liabilities assumed recognized at the acquisition date.

($ in millions)
Purchase price
Cash consideration	$	298
Allocation of purchase price to net assets acquired
Intangible assets (a)	82
Cash and short-term investments (b)	50
Other assets	14
Deferred tax asset, net	4
Employee compensation and benefits	(41		)
Other liabilities	(4		)
Goodwill	$	193

(a) We recorded $3 million of amortization on these intangible assets during both the three and nine months ended September 30, 2016.

(b) Includes $40 million in cash proceeds from the acquisition transaction in order to pay employee compensation and benefits that vested upon acquisition as a result of the change in control.

The goodwill of $193 million arising from the acquisition consists largely of expected growth of the business as we leverage the Ally brand and our marketing capabilities to scale the acquired technology platform and expand the suite of financial products we offer to our existing growing customer base. None of the goodwill recognized is expected to be deductible for income tax purposes. Refer to Note 11 for a reconciliation of the carrying amount of goodwill at the beginning and end of the reporting period.

On August 1, 2016, we acquired assets from Blue Yield, an online automotive lender exchange, as we continue to expand our automotive finance offerings to include a direct-to-consumer model. We completed the acquisition for $28 million of total consideration. As a result of the purchase, we recognized $20 million of goodwill within Automotive Finance operations.

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Discontinued Operations

9 Months Ended

Sep. 30, 2016

Discontinued Operations and Disposal Groups [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

Discontinued Operations

Prior to the adoption of ASU 2014-08, which was prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income. The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted.

Select Automotive Finance Operations

During the fourth quarter of 2012 we entered into an agreement with General Motors Financial Company Inc. (GMF) to sell our 40% interest in a motor vehicle finance joint venture in China. On January 2, 2015, the sale of our interest in the motor vehicle finance joint venture in China was completed and an after-tax gain of approximately $400 million was recorded. The tax expense included in this gain was reduced by the release of the valuation allowance on our capital loss carryforward deferred tax asset that was utilized to offset capital gains stemming from this sale. The remaining activity relates to previous discontinued operations for which we continue to have minimal residual costs.

Other Operations

Other operations relate to previous discontinued operations for which we continue to have wind-down, legal, and minimal operational costs. Refer to Note 26 to the Condensed Consolidated Financial Statements, titled Contingencies and Other Risks, for additional discussion.

Select Financial Information

Select financial information of discontinued operations is summarized below. The pretax income or loss includes direct costs to transact a sale.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Select Automotive Finance operations
Pretax (loss) income (a)	$	(5	)	$	(1	)	$	(5	)	$	452
Tax expense (b)	2			3			2			68
Other operations
Pretax (loss) income	$	(41	)	$	(1	)	$	(39	)	$	19
Tax expense (benefit)	4			—			—			(2		)

(a) Includes certain treasury and other corporate activity recognized by Corporate and Other.

(b) Includes certain income tax activity recognized by Corporate and Other.

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Other Income, Net of Losses

9 Months Ended

Sep. 30, 2016

Other Nonoperating Income (Expense) [Abstract]

Other Income, Net of Losses [Text Block]

Other Income, Net of Losses

Details of other income, net of losses, were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Remarketing fees	$	26	$	25	$	79	$	78
Late charges and other administrative fees	25		23		72		66
Servicing fees	18		12		49		32
Income from equity-method investments	3		11		14		48
Other, net	26		21		75		59
Total other income, net of losses	$	98	$	92	$	289	$	283

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Other Operating Expenses

9 Months Ended

Sep. 30, 2016

Operating Expenses [Abstract]

Other Operating Expenses [Text Block]

Other Operating Expenses

Details of other operating expenses were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Insurance commissions	$	99	$	95	$	290	$	283
Technology and communications	70		65		203		198
Lease and loan administration	34		31		100		92
Advertising and marketing	27		26		75		80
Professional services	25		23		75		68
Vehicle remarketing and repossession	24		20		70		56
Regulatory and licensing fees	26		18		68		59
Premises and equipment depreciation	19		20		61		62
Occupancy	13		13		38		38
Non-income taxes	10		11		27		26
Other	71		56		182		166
Total other operating expenses	$	418	$	378	$	1,189	$	1,128

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Investment Securities

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Investment Securities [Text Block]

Investment Securities

Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, and other investments. The cost, fair value, and gross unrealized gains and losses on investment securities were as follows.

	September 30, 2016									December 31, 2015
	Amortized cost		Gross unrealized					Fair value		Amortized cost		Gross unrealized					Fair value
($ in millions)			gains		losses							gains		losses
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	316	$	5	$	—		$	321	$	1,760	$	—	$	(19	)	$	1,741
U.S. States and political subdivisions	740		26		(3		)	763		693		24		(1		)	716
Foreign government	170		10		—			180		169		8		—			177
Mortgage-backed residential (a)	11,992		180		(29		)	12,143		10,459		52		(145		)	10,366
Mortgage-backed commercial	526		1		(3		)	524		486		—		(5		)	481
Asset-backed	1,563		8		(1		)	1,570		1,762		1		(8		)	1,755
Corporate debt	1,597		36		(3		)	1,630		1,213		8		(17		)	1,204
Total debt securities (b) (c)	16,904		266		(39		)	17,131		16,542		93		(195		)	16,440
Equity securities	631		2		(63		)	570		808		3		(94		)	717
Total available-for-sale securities	$	17,535	$	268	$	(102	)	$	17,701	$	17,350	$	96	$	(289	)	$	17,157
Total held-to-maturity securities (d)	$	649	$	10	$	(1	)	$	658	$	—	$	—	$	—		$	—

(a) Residential mortgage-backed securities include agency-backed bonds totaling $9,772 million and $7,544 million at September 30, 2016, and December 31, 2015, respectively.

(b) Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. These deposited securities totaled $15 million and $14 million at September 30, 2016, and December 31, 2015.

(c) Investment securities with a fair value of $635 million and $2,506 million at September 30, 2016, and December 31, 2015, were pledged to secure advances from the FHLB, short-term borrowings or repurchase agreements and for other purposes as required by contractual obligation or law. Under these agreements, Ally has granted the counterparty the right to sell or pledge $635 million and $745 million of the underlying investment securities at September 30, 2016, and December 31, 2015, respectively.

(d) Held-to-maturity securities are recorded at amortized cost and consist of agency-backed residential mortgage-backed debt securities for liquidity purposes.

The maturity distribution of investment securities outstanding is summarized in the following tables. Call or prepayment options may cause actual maturities to differ from contractual maturities.

	Total				Due in one year or less				Due after one year through five years				Due after five years through ten years				Due after ten years
($ in millions)	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield
September 30, 2016
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	321	1.7	%	$	2	4.3	%	$	10	1.7	%	$	309	1.7	%	$	—	—	%
U.S. States and political subdivisions	763		3.1		115		2.4		24		2.4		143		3.0		481		3.4
Foreign government	180		2.6		—		—		73		2.9		107		2.5		—		—
Mortgage-backed residential	12,143		2.9		—		—		—		—		34		2.5		12,109		2.9
Mortgage-backed commercial	524		2.4		—		—		—		—		3		2.8		521		2.4
Asset-backed	1,570		2.7		—		—		1,059		2.6		300		3.3		211		2.5
Corporate debt	1,630		2.9		50		2.3		949		2.6		591		3.2		40		4.7
Total available-for-sale debt securities	$	17,131	2.9		$	167	2.4		$	2,115	2.6		$	1,487	2.8		$	13,362	2.9
Amortized cost of available-for-sale debt securities	$	16,904			$	168			$	2,093			$	1,449			$	13,194
Amortized cost of held-to-maturity securities	$	649	2.9	%	$	—	—	%	$	—	—	%	$	—	—	%	$	649	2.9	%
December 31, 2015
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	1,741	1.8	%	$	6	5.1	%	$	510	1.2	%	$	1,225	2.1	%	$	—	—	%
U.S. States and political subdivisions	716		3.2		86		1.3		37		2.2		141		2.8		452		3.7
Foreign government	177		2.6		9		1.9		77		2.8		91		2.6		—		—
Mortgage-backed residential	10,366		2.9		—		—		33		2.1		36		2.5		10,297		2.9
Mortgage-backed commercial	481		2.0		—		—		—		—		3		2.7		478		2.0
Asset-backed	1,755		2.3		6		1.4		1,027		2.1		518		2.6		204		2.2
Corporate debt	1,204		2.9		50		3.0		713		2.5		410		3.4		31		5.4
Total available-for-sale debt securities	$	16,440	2.7		$	157	2.0		$	2,397	2.1		$	2,424	2.5		$	11,462	2.9
Amortized cost of available-for-sale debt securities	$	16,542			$	156			$	2,404			$	2,436			$	11,546

(a) Yield is calculated using the effective yield of each security at the end of the period, weighted based on the market value. The effective yield considers the contractual coupon and amortized cost, and excludes expected capital gains and losses.

The balances of cash equivalents were $0.8 billion and $1.0 billion at September 30, 2016, and December 31, 2015, respectively, and were composed primarily of money market accounts and short-term securities, including U.S. Treasury bills.

The following table presents interest and dividends on investment securities.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Taxable interest	$	93	$	90	$	276	$	252
Taxable dividends	4		7		13		18
Interest and dividends exempt from U.S. federal income tax	4		5		13		13
Interest and dividends on investment securities	$	101	$	102	$	302	$	283

The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016		2015			2016			2015
Gross realized gains	$	52	$	28		$	146		$	134
Gross realized losses (a)	—		(11		)	(1		)	(14		)
Other-than-temporary impairment	—		(11		)	—			(14		)
Other gain on investments, net	$	52	$	6		$	145		$	106

(a) Certain available-for-sale securities were sold at a loss in 2016 and 2015 as a result of changing conditions within these respective periods (e.g., a downgrade in the rating of a debt security). Any such sales were made in accordance with our risk management policies and practices.

The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the assessment of whether such losses were deemed to be other-than-temporary, we believe that the unrealized losses are not indicative of an other-than-temporary impairment of these securities. As of September 30, 2016, we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis, and we expect to recover the entire amortized cost basis of the securities. As of September 30, 2016, we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at September 30, 2016. Refer to Note 1 for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments.

	September 30, 2016										December 31, 2015
	Less than 12 months					12 months or longer					Less than 12 months					12 months or longer
($ in millions)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	—	$	—		$	—	$	—		$	1,553	$	(17	)	$	173	$	(2	)
U.S. States and political subdivisions	254		(2		)	11		(1		)	179		(1		)	—		—
Foreign government	—		—			—		—			2		—			—		—
Mortgage-backed	948		(4		)	1,786		(28		)	4,096		(43		)	2,453		(107		)
Asset-backed	406		(1		)	140		—			1,402		(8		)	64		—
Corporate debt	134		(1		)	50		(2		)	745		(16		)	12		(1		)
Total temporarily impaired debt securities	1,742		(8		)	1,987		(31		)	7,977		(85		)	2,702		(110		)
Temporarily impaired equity securities	148		(12		)	329		(51		)	534		(54		)	96		(40		)
Total temporarily impaired available-for-sale securities	$	1,890	$	(20	)	$	2,316	$	(82	)	$	8,511	$	(139	)	$	2,798	$	(150	)

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Finance Receivables and Loans, Net

9 Months Ended

Sep. 30, 2016

Loans and Leases Receivable, Net Amount [Abstract]

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

Finance Receivables and Loans, Net

The composition of finance receivables and loans reported at gross carrying value was as follows.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive (a)	$	64,816	$	64,292
Consumer mortgage
Mortgage Finance (b)	7,931		6,413
Mortgage — Legacy (c)	2,926		3,360
Total consumer mortgage	10,857		9,773
Total consumer	75,673		74,065
Commercial
Commercial and industrial
Automotive	32,260		31,469
Other	3,250		2,640
Commercial real estate — Automotive	3,776		3,426
Total commercial	39,286		37,535
Total finance receivables and loans (d)	$	114,959	$	111,600

(a) Includes $66 million of fair value adjustment for loans in hedge accounting relationships at both September 30, 2016, and December 31, 2015. Refer to Note 20 for additional information.

(b) Includes loans originated as interest-only mortgage loans of $32 million and $44 million at September 30, 2016, and December 31, 2015, respectively, none of which are expected to start principal amortization in 2016, 3% in 2017, none in 2018, 39% in 2019, and 39% thereafter.

(c) Includes loans originated as interest-only mortgage loans of $771 million and $941 million at September 30, 2016, and December 31, 2015, respectively, 8% of which are expected to start principal amortization in 2016, 23% in 2017, 2% in 2018, none in 2019, and 1% thereafter.

(d) Totals include a net increase of $310 million and $110 million at September 30, 2016, and December 31, 2015, respectively, for unearned income, unamortized premiums and discounts, and deferred fees and costs.

The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans.

Three months ended September 30, 2016 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial		Total
Allowance at July 1, 2016	$	862		$	109		$	118	$	1,089
Charge-offs	(293		)	(10		)	—		(303		)
Recoveries	74			16			—		90
Net charge-offs	(219		)	6			—		(213		)
Provision for loan losses	269			(15		)	4		258
Allowance at September 30, 2016	$	912		$	100		$	122	$	1,134

Three months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at July 1, 2015	$	767		$	119		$	88		$	974
Charge-offs	(220		)	(10		)	(1		)	(231		)
Recoveries	64			4			2			70
Net charge-offs	(156		)	(6		)	1			(161		)
Provision for loan losses	200			6			5			211
Other (a)	(7		)	—			1			(6		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018

(a)    Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Nine months ended September 30, 2016($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2016	$	834		$	114		$	106		$	1,054
Charge-offs	(773		)	(29		)	(1		)	(803		)
Recoveries	233			25			1			259
Net charge-offs	(540		)	(4		)	—			(544		)
Provision for loan losses	644			(10		)	16			650
Other (a)	(26		)	—			—			(26		)
Allowance at September 30, 2016	$	912		$	100		$	122		$	1,134
Allowance for loan losses at September 30, 2016
Individually evaluated for impairment	$	24		$	35		$	25		$	84
Collectively evaluated for impairment	888			65			97			1,050
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	64,816		$	10,857		$	39,286		$	114,959
Individually evaluated for impairment	349			251			111			711
Collectively evaluated for impairment	64,467			10,606			39,175			114,248
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Nine months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2015	$	685		$	152		$	140		$	977
Charge-offs	(579		)	(41		)	(1		)	(621		)
Recoveries	195			12			3			210
Net charge-offs	(384		)	(29		)	2			(411		)
Provision for loan losses	510			4			(47		)	467
Other (a)	(7		)	(8		)	—			(15		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018
Allowance for loan losses at September 30, 2015
Individually evaluated for impairment	$	22		$	48		$	19		$	89
Collectively evaluated for impairment	782			71			76			929
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	63,610		$	9,769		$	34,611		$	107,990
Individually evaluated for impairment	285			268			75			628
Collectively evaluated for impairment	63,325			9,501			34,536			107,362
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

The following table presents the gross carrying value of significant sales of finance receivables and loans and transfers of finance receivables and loans from held-for-investment to held-for-sale.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	57	$	704	$	4,216	$	704
Consumer mortgage	6		2		12		75
Commercial	—		1		28		1
Total sales and transfers	$	63	$	707	$	4,256	$	780

The following table presents information about significant purchases of finance receivables and loans.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	—	$	272	$	—	$	272
Consumer mortgage	467		990		2,855		3,640
Total purchases of finance receivables and loans	$	467	$	1,262	$	2,855	$	3,912

The following table presents an analysis of our past due finance receivables and loans recorded at gross carrying value.

($ in millions)	30-59 days past due		60-89 days past due		90 days or more past due		Total past due		Current		Total finance receivables and loans
September 30, 2016
Consumer automotive	$	1,584	$	343	$	260	$	2,187	$	62,629	$	64,816
Consumer mortgage
Mortgage Finance	64		4		4		72		7,859		7,931
Mortgage — Legacy	49		12		60		121		2,805		2,926
Total consumer mortgage	113		16		64		193		10,664		10,857
Total consumer	1,697		359		324		2,380		73,293		75,673
Commercial
Commercial and industrial
Automotive	—		—		—		—		32,260		32,260
Other	—		—		—		—		3,250		3,250
Commercial real estate — Automotive	—		—		—		—		3,776		3,776
Total commercial	—		—		—		—		39,286		39,286
Total consumer and commercial	$	1,697	$	359	$	324	$	2,380	$	112,579	$	114,959
December 31, 2015
Consumer automotive	$	1,618	$	369	$	222	$	2,209	$	62,083	$	64,292
Consumer mortgage
Mortgage Finance	44		5		10		59		6,354		6,413
Mortgage — Legacy	53		20		73		146		3,214		3,360
Total consumer mortgage	97		25		83		205		9,568		9,773
Total consumer	1,715		394		305		2,414		71,651		74,065
Commercial
Commercial and industrial
Automotive	—		—		—		—		31,469		31,469
Other	—		—		—		—		2,640		2,640
Commercial real estate — Automotive	—		—		—		—		3,426		3,426
Total commercial	—		—		—		—		37,535		37,535
Total consumer and commercial	$	1,715	$	394	$	305	$	2,414	$	109,186	$	111,600

The following table presents the gross carrying value of our finance receivables and loans on nonaccrual status.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive	$	542	$	475
Consumer mortgage
Mortgage Finance	9		15
Mortgage — Legacy	91		113
Total consumer mortgage	100		128
Total consumer	642		603
Commercial
Commercial and industrial
Automotive	44		25
Other	62		44
Commercial real estate — Automotive	5		8
Total commercial	111		77
Total consumer and commercial finance receivables and loans	$	753	$	680

Management performs a quarterly analysis of the consumer automotive, consumer mortgage, and commercial portfolios using a range of credit quality indicators to assess the adequacy of the allowance for loan losses based on historical and current trends. The following tables present the population of loans by quality indicators for our consumer automotive, consumer mortgage, and commercial portfolios.

The following table presents performing and nonperforming credit quality indicators in accordance with our internal accounting policies for our consumer finance receivables and loans recorded at gross carrying value. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is not expected. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

	September 30, 2016						December 31, 2015
($ in millions)	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Consumer automotive	$	64,274	$	542	$	64,816	$	63,817	$	475	$	64,292
Consumer mortgage
Mortgage Finance	7,922		9		7,931		6,398		15		6,413
Mortgage — Legacy	2,835		91		2,926		3,247		113		3,360
Total consumer mortgage	10,757		100		10,857		9,645		128		9,773
Total consumer	$	75,031	$	642	$	75,673	$	73,462	$	603	$	74,065

The following table presents pass and criticized credit quality indicators based on regulatory definitions for our commercial finance receivables and loans recorded at gross carrying value.

	September 30, 2016						December 31, 2015
($ in millions)	Pass		Criticized (a)		Total		Pass		Criticized (a)		Total
Commercial and industrial
Automotive	$	30,355	$	1,905	$	32,260	$	29,613	$	1,856	$	31,469
Other	2,574		676		3,250		2,122		518		2,640
Commercial real estate — Automotive	3,600		176		3,776		3,265		161		3,426
Total commercial	$	36,529	$	2,757	$	39,286	$	35,000	$	2,535	$	37,535

(a) Includes loans classified as special mention, substandard, or doubtful. These classifications are based on regulatory definitions and generally represent loans within our portfolio that have a higher default risk or have already defaulted.

Impaired Loans and Troubled Debt Restructurings

Impaired Loans

Loans are considered impaired when we determine it is probable that we will be unable to collect all amounts due according to the terms of the loan agreement. For more information on our impaired finance receivables and loans, refer to Note 1 to the Annual Consolidated Financial Statements.

The following table presents information about our impaired finance receivables and loans.

($ in millions)	Unpaid principal balance (a)		Gross carrying value		Impaired with no allowance		Impaired with an allowance		Allowance for impaired loans
September 30, 2016
Consumer automotive	$	385	$	349	$	124	$	225	$	24
Consumer mortgage
Mortgage Finance	7		7		3		4		—
Mortgage — Legacy	248		244		56		188		35
Total consumer mortgage	255		251		59		192		35
Total consumer	640		600		183		417		59
Commercial
Commercial and industrial
Automotive	44		44		10		34		6
Other	76		62		—		62		18
Commercial real estate — Automotive	5		5		1		4		1
Total commercial	125		111		11		100		25
Total consumer and commercial finance receivables and loans	$	765	$	711	$	194	$	517	$	84
December 31, 2015
Consumer automotive	$	315	$	315	$	—	$	315	$	22
Consumer mortgage
Mortgage Finance	9		9		5		4		1
Mortgage — Legacy	260		257		59		198		43
Total consumer mortgage	269		266		64		202		44
Total consumer	584		581		64		517		66
Commercial
Commercial and industrial
Automotive	25		25		4		21		3
Other	44		44		—		44		15
Commercial real estate — Automotive	8		8		1		7		2
Total commercial	77		77		5		72		20
Total consumer and commercial finance receivables and loans	$	661	$	658	$	69	$	589	$	86

(a) Adjusted for charge-offs.

The following tables present average balance and interest income for our impaired finance receivables and loans.

	2016				2015
Three months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	347	$	4	$	288	$	4
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	245		2		261		3
Total consumer mortgage	253		2		268		3
Total consumer	600		6		556		7
Commercial
Commercial and industrial
Automotive	48		1		36		—
Other	63		—		45		—
Commercial real estate — Automotive	6		—		6		—
Total commercial	117		1		87		—
Total consumer and commercial finance receivables and loans	$	717	$	7	$	643	$	7

	2016				2015
Nine months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	340	$	12	$	291	$	13
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	250		7		276		7
Total consumer mortgage	258		7		283		7
Total consumer	598		19		574		20
Commercial
Commercial and industrial
Automotive	35		1		35		1
Other	58		1		39		3
Commercial real estate — Automotive	6		—		5		—
Total commercial	99		2		79		4
Total consumer and commercial finance receivables and loans	$	697	$	21	$	653	$	24

Troubled Debt Restructurings

Troubled Debt Restructurings (TDRs) are loan modifications where concessions were granted to borrowers experiencing financial difficulties. For mortgage loans, as part of our participation in certain governmental programs, we offer mortgage loan modifications to qualified borrowers. Numerous initiatives are in place to provide support to our mortgage customers in financial distress, including principal forgiveness, maturity extensions, delinquent interest capitalization, and changes to contractual interest rates. Additionally, for automotive loans, we may offer several types of assistance to aid our customers, including extension of the loan maturity date and rewriting the loan terms. Total TDRs recorded at gross carrying value were $640 million and $625 million at September 30, 2016, and December 31, 2015, respectively. Commercial commitments to lend additional funds to borrowers owing receivables whose terms had been modified in a TDR were $2 million, at both September 30, 2016, and December 31, 2015. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

The following tables present information related to finance receivables and loans recorded at gross carrying value modified in connection with a TDR during the period.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	4,427	$	70	$	58	4,612	$	75	$	66
Consumer mortgage
Mortgage Finance	2	—		—		3	2		2
Mortgage — Legacy	35	6		6		50	11		11
Total consumer mortgage	37	6		6		53	13		13
Total consumer	4,464	76		64		4,665	88		79
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	4,464	$	76	$	64	4,667	$	112	$	103

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	14,816	$	238	$	202	12,763	$	202	$	173
Consumer mortgage
Mortgage Finance	5	2		2		5	3		3
Mortgage — Legacy	92	14		14		164	39		37
Total consumer mortgage	97	16		16		169	42		40
Total consumer	14,913	254		218		12,932	244		213
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	14,913	$	254	$	218	12,934	$	268	$	237

The following tables present information about finance receivables and loans recorded at gross carrying value that have redefaulted during the reporting period and were within 12 months or less of being modified as a TDR. Redefault is when finance receivables and loans meet the requirements for evaluation under our charge-off policy (refer to Note 1 to the Annual Consolidated Financial Statements for additional information) except for commercial finance receivables and loans, where redefault is defined as 90 days past due.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	1,959	$	23	$	14	1,742	$	21	$	12
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	1	—		—		2	1		—
Total consumer finance receivables and loans	1,960	$	23	$	14	1,744	$	22	$	12

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	5,617	$	69	$	39	4,822	$	58	$	33
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	4	—		—		9	1		—
Total consumer finance receivables and loans	5,621	$	69	$	39	4,831	$	59	$	33

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Investment in Operating Leases, Net

9 Months Ended

Sep. 30, 2016

Leases, Operating [Abstract]

Operating Leases of Lessor Disclosure [Text Block]

Investment in Operating Leases, Net

Investments in operating leases were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Vehicles	$	16,086		$	20,211
Accumulated depreciation	(3,397		)	(3,940		)
Investment in operating leases, net	$	12,689		$	16,271

Depreciation expense on operating lease assets includes remarketing gains and losses recognized on the sale of operating lease assets. The following summarizes the components of depreciation expense on operating lease assets.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Depreciation expense on operating lease assets (excluding remarketing gains)	$	470		$	633		$	1,555		$	1,995
Remarketing gains	(62		)	(105		)	(203		)	(282		)
Net depreciation expense on operating lease assets	$	408		$	528		$	1,352		$	1,713

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Securitizations and Variable Interest Entities

9 Months Ended

Sep. 30, 2016

Securitizations And Variable Interest Entities [Abstract]

Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together [Table Text Block]

The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses.

	Total Amount				Amount 60 days or more past due
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
On-balance sheet loans
Consumer automotive	$	64,816	$	64,292	$	603	$	591
Consumer mortgage	10,857		9,773		80		108
Commercial automotive	36,036		34,895		—		—
Commercial other	3,306		2,745		—		—
Total on-balance sheet loans	115,015		111,705		683		699
Off-balance sheet securitization entities
Consumer automotive	2,734		2,529		11		9
Total off-balance sheet securitization entities	2,734		2,529		11		9
Whole-loan sales (a)	3,556		2,252		6		13
Total	$	121,305	$	116,486	$	700	$	721

(a) Whole-loan sales are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors.

	Net credit losses
	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016		2015
On-balance sheet loans
Consumer automotive	$	219		$	156		$	540	$	384
Consumer mortgage	(6		)	6			4		29
Commercial automotive	—			—			—		—
Commercial other	—			(1		)	—		(2		)
Total on-balance sheet loans	213			161			544		411
Off-balance sheet securitization entities
Consumer automotive	2			1			6		3
Total off-balance sheet securitization entities	2			1			6		3
Whole-loan sales	1			—			2		—
Total	$	216		$	162		$	552	$	414

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Servicing Activities

9 Months Ended

Sep. 30, 2016

Servicing Asset [Abstract]

Servicing Activities [Text Block]

Servicing Activities

Automotive Finance Servicing Activities

We service consumer automotive contracts. Historically, we have sold a portion of our consumer automotive contracts. With respect to contracts we sell, we retain the right to service and earn a servicing fee for our servicing function. We have concluded that the fee we are paid for servicing consumer automotive finance receivables represents adequate compensation, and consequently, we do not recognize a servicing asset or liability. We recognized automotive servicing fee income of $18 million and $49 million during the three months and nine months endedSeptember 30, 2016, respectively, compared to $12 million and $32 million during the three months and nine months endedSeptember 30, 2015.

Automotive Finance Serviced Assets

The current unpaid principal balance and any related unamortized deferred fees and costs of total serviced automotive finance loans and leases outstanding were as follows.

($ in millions)	September 30, 2016		December 31, 2015
On-balance sheet automotive finance loans and leases
Consumer automotive	$	64,672	$	64,067
Commercial automotive	36,036		34,895
Operating leases	12,497		15,965
Other	68		72
Off-balance sheet automotive finance loans
Securitizations	2,760		2,550
Whole-loan	3,592		2,259
Total serviced automotive finance loans and leases	$	119,625	$	119,808

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Other Assets

9 Months Ended

Sep. 30, 2016

Other Assets [Abstract]

Other Assets Disclosure [Text Block]

Other Assets

The components of other assets were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Property and equipment at cost	$	838		$	691
Accumulated depreciation	(507		)	(456		)
Net property and equipment	331			235
Restricted cash collections for securitization trusts (a)	1,473			2,010
Net deferred tax assets	967			1,369
Nonmarketable equity investments (b)	818			418
Other accounts receivable	447			158
Accrued interest and rent receivables	408			402
Goodwill (c)	240			27
Cash reserve deposits held-for-securitization trusts (d)	188			252
Fair value of derivative contracts in receivable position (e)	141			233
Restricted cash and cash equivalents	98			120
Cash collateral placed with counterparties	78			125
Other assets	1,118			972
Total other assets	$	6,307		$	6,321

(a) Represents cash collections from customer payments on securitized receivables. These funds are distributed to investors as payments on the related secured debt.

(b) Includes investments in FHLB stock of $352 million and $391 million and FRB stock of $435 million and $0 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes goodwill of $27 million at our Insurance operations at both September 30, 2016, and December 31, 2015, $193 million and $0 million within Corporate and Other at September 30, 2016, and December 31, 2015, respectively, and $20 million and $0 million within Automotive Finance operations at September 30, 2016, and December 31, 2015, respectively. As a result of our acquisition of TradeKing, we recognized $193 million of goodwill within Corporate and Other on June 1, 2016. On August 1, 2016, we purchased assets from Blue Yield. As a result of this purchase, we recognized $20 million of goodwill within Automotive Finance operations. No other changes in the carrying amount of goodwill were recorded during the nine months endedSeptember 30, 2016.

(d) Represents credit enhancement in the form of cash reserves for various securitization transactions.

(e) For additional information on derivative instruments and hedging activities, refer to Note 20.

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Deposit Liabilities

9 Months Ended

Sep. 30, 2016

Deposits [Abstract]

Deposit Liabilities Disclosures [Text Block]

Deposit Liabilities

Deposit liabilities consisted of the following.

($ in millions)	September 30, 2016		December 31, 2015
Noninterest-bearing deposits	$	101	$	89
Interest-bearing deposits
Savings and money market checking accounts	44,846		36,386
Certificates of deposit	30,604		29,774
Dealer deposits	193		229
Total deposit liabilities	$	75,744	$	66,478

At September 30, 2016, and December 31, 2015, certificates of deposit included $11.5 billion of certificates of deposit in denominations of $100 thousand or more. At September 30, 2016, and December 31, 2015, certificates of deposit included $3.1 billion and $3.2 billion, respectively, in denominations in excess of $250 thousand federal insurance limits.

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Short-term Borrowings

9 Months Ended

Sep. 30, 2016

Short-term Debt [Abstract]

Short-term Debt [Text Block]

Short-term Borrowings

The following table presents the composition of our short-term borrowings portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured (a)		Total		Unsecured		Secured (a)		Total
Demand notes	$	3,525	$	—	$	3,525	$	3,369	$	—	$	3,369
Federal Home Loan Bank	—		2,250		2,250		—		4,000		4,000
Securities sold under agreements to repurchase	—		659		659		—		648		648
Other	—		—		—		84		—		84
Total short-term borrowings	$	3,525	$	2,909	$	6,434	$	3,453	$	4,648	$	8,101

(a) Refer to Note 14 for further details on assets restricted as collateral for payment of the related debt.

We periodically enter into term repurchase agreements, short-term borrowing agreements in which we sell financial instruments to one or more investors while simultaneously committing to repurchase them at a specified future date, at the stated price plus accrued interest. As of September 30, 2016, the financial instruments sold under agreement to repurchase consisted of mortgage-backed residential securities with the following maturities: $304 millionwithin the next 30 days and$355 millionwithin 31 to 60 days. Refer to Note 6 and Note 23 for further details on investment securities sold under agreements to repurchase.

The primary risk associated with these repurchase agreements is that the counterparty will be unable to perform under the terms of the contract. As the borrower, we are exposed to the excess market value of the securities pledged over the amount borrowed. Daily mark-to-market collateral management is designed to limit this risk to the initial margin. However, should a counterparty declare bankruptcy or become insolvent, we may incur additional delays and costs. As of September 30, 2016, we placed cash collateral totaling $7 million with counterparties under these collateral arrangements associated with our repurchase agreements.

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Long-term Debt

9 Months Ended

Sep. 30, 2016

Long-term Debt, Unclassified [Abstract]

Long-term Debt [Text Block]

Long-term Debt

The following table presents the composition of our long-term debt portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured		Total		Unsecured		Secured			Total
Long-term debt
Due within one year	$	3,279	$	11,805	$	15,084	$	1,829	$	9,427		$	11,256
Due after one year (a)	16,410		24,861		41,271		18,803		35,844			54,647
Fair value adjustment (b)	471		10		481		334		(3		)	331
Total long-term debt (c)	$	20,160	$	36,676	$	56,836	$	20,966	$	45,268		$	66,234

(a) Includes $2.6 billion of trust preferred securities at both September 30, 2016, and December 31, 2015.

(b) Represents the fair value adjustment associated with the application of hedge accounting on certain of our long-term debt positions. Refer to Note 20 for additional information.

(c) Includes advances from the Federal Home Loan Bank of Pittsburgh of $6.1 billion and $5.4 billion at September 30, 2016, and December 31, 2015, respectively.

The following table presents the scheduled remaining maturity of long-term debt at September 30, 2016, assuming no early redemptions will occur. The actual payment of secured debt may vary based on the payment activity of the related pledged assets.

($ in millions)	2016			2017			2018			2019			2020			2021 and thereafter			Fair value adjustment		Total
Unsecured
Long-term debt	$	19		$	4,365		$	3,700		$	1,662		$	2,212		$	9,078		$	471	$	21,507
Original issue discount	(21		)	(91		)	(101		)	(39		)	(39		)	(1,056		)	—		(1,347		)
Total unsecured	(2		)	4,274			3,599			1,623			2,173			8,022			471		20,160
Secured
Long-term debt	2,118			11,855			7,512			7,197			4,155			3,829			10		36,676
Total long-term debt	$	2,116		$	16,129		$	11,111		$	8,820		$	6,328		$	11,851		$	481	$	56,836

The following summarizes assets restricted as collateral for the payment of the related debt obligation primarily arising from securitization transactions accounted for as secured borrowings and repurchase agreements.

	September 30, 2016					December 31, 2015
($ in millions)	Total			Ally Bank (a)		Total			Ally Bank (a)
Investment securities(b)	$	586		$	—	$	2,420		$	1,761
Mortgage assets held-for-investment and lending receivables	10,770			10,770		9,743			9,743
Consumer automotive finance receivables	28,870			5,485		34,324			9,167
Commercial automotive finance receivables	19,275			19,020		19,623			19,177
Investment in operating leases, net	2,706			1,290		5,539			3,205
Other assets (b)	93			—		—			—
Total assets restricted as collateral (c) (d)	$	62,300		$	36,565	$	71,649		$	43,053
Secured debt	$	39,585	(e)	$	17,736	$	49,916	(e)	$	24,787

(a) Ally Bank is a component of the total column.

(b) Certain investment securities and other assets are restricted under repurchase agreements. Refer to Note 13 for information on the repurchase agreements.

(c) Ally Bank has an advance agreement with the FHLB, and had assets pledged to secure borrowings that were restricted as collateral to the FHLB totaling $14.5 billion and $14.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed primarily of consumer mortgage finance receivables and loans, net and investment securities. Ally Bank has access to the Federal Reserve Bank Discount Window. Ally Bank had assets pledged and restricted as collateral to the Federal Reserve Bank totaling $2.4 billion and $2.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed of consumer automotive finance receivables and loans, net and investment in operating leases, net. Availability under these programs is only for the operations of Ally Bank and cannot be used to fund the operations or liabilities of Ally or its subsidiaries.

(d) Excludes restricted cash and cash reserves for securitization trusts recorded within other assets on the Condensed Consolidated Balance Sheet. Refer to Note 11 for additional information.

(e) Includes $2.9 billion and $4.6 billion of short-term borrowings at September 30, 2016, and December 31, 2015, respectively.

Trust Preferred Securities

At September 30, 2016, we have issued and outstanding approximately $2.6 billion in aggregate liquidation preference of 8.125% Fixed Rate / Floating Rate Trust Preferred Securities, Series 2 (Series 2 TRUPS) net of original issue discount and debt issuance costs. Each Series 2 TRUPS security has a liquidation amount of $25. Distributions are cumulative and are payable until redemption at the applicable coupon rate. Distributions were payable at an annual rate of 8.125% payable quarterly in arrears, through but excluding February 15, 2016. From and including February 15, 2016, to but excluding February 15, 2040, distributions will be payable at an annual rate equal to three-month London interbank offer rate plus 5.785% payable quarterly in arrears, beginning May 15, 2016. Ally has the right to defer payments of interest for a period not exceeding 20 consecutive quarters. The Series 2 TRUPS have no stated maturity date, but must be redeemed upon the redemption or maturity of the related debentures (Debentures), which mature on February 15, 2040. Ally at any time on or after February 15, 2016 may redeem the Series 2 TRUPS at a redemption price equal to 100% of the principal amount being redeemed, plus accrued and unpaid interest through the date of redemption. The Series 2 TRUPS are generally nonvoting, other than with respect to certain limited matters. During any period in which any Series 2 TRUPS remain outstanding but in which distributions on the Series 2 TRUPS have not been fully paid, none of Ally or its subsidiaries will be permitted to (i) declare or pay dividends on, make any distributions with respect to, or redeem, purchase, acquire or otherwise make a liquidation payment with respect to, any of Ally’s capital stock or make any guarantee payment with respect thereto; or (ii) make any payments of principal, interest, or premium on, or repay, repurchase or redeem, any debt securities or guarantees that rank on a parity with or junior in interest to the Debentures with certain specified exceptions in each case.

Funding Facilities

We utilize both committed credit facilities and other collateralized funding vehicles. The debt outstanding under our various funding facilities is included on our Condensed Consolidated Balance Sheet.

As of September 30, 2016, Ally Bank had exclusive access to $3.6 billion of funding capacity from committed credit facilities. Funding programs supported by the Federal Reserve and the FHLB, together with repurchase agreements, complement Ally Bank’s private collateralized funding vehicles.

The total capacity in our committed funding facilities is provided by banks and other financial institutions through private transactions. The committed secured funding facilities can be revolving in nature and allow for additional funding during the commitment period, or they can be amortizing and not allow for any further funding after the closing date. At September 30, 2016, all of our $18.1 billion of committed capacity was revolving. Our revolving facilities generally have an original tenor ranging from 364 days to two years. As of September 30, 2016, we had $14.1 billion of committed funding capacity from revolving facilities with a remaining tenor greater than 364 days.

Committed Funding Facilities

	Outstanding				Unused capacity (a)				Total capacity
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Bank funding
Secured (b)	$	2,950	$	3,250	$	650	$	—	$	3,600	$	3,250
Parent funding
Secured	11,725		16,914		2,800		251		14,525		17,165
Total committed facilities	$	14,675	$	20,164	$	3,450	$	251	$	18,125	$	20,415

(a) Funding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

(b) Excludes off-balance sheet credit facility amounts.

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Accrued Expenses and Other Liabilities

9 Months Ended

Sep. 30, 2016

Accounts Payable and Accrued Liabilities [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

Accrued Expenses and Other Liabilities

The components of accrued expenses and other liabilities were as follows.

($ in millions)	September 30, 2016		December 31, 2015
Accounts payable	$	781	$	391
Employee compensation and benefits	218		242
Reserves for insurance losses and loss adjustment expenses	150		169
Cash collateral received from counterparties	113		82
Deferred revenue	66		108
Fair value of derivative contracts in payable position (a)	46		145
Other liabilities	424		408
Total accrued expenses and other liabilities	$	1,798	$	1,545

(a) For additional information on derivative instruments and hedging activities, refer to Note 20.

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Preferred Stock

9 Months Ended

Sep. 30, 2016

Preferred Stock, Including Additional Paid in Capital [Abstract]

Preferred Stock [Text Block]

Preferred Stock

The following table summarizes information about our Series A Preferred Stock.

	September 30, 2016			December 31, 2015
Series A preferred stock
Carrying value ($ in millions)	$	—		$	696
Par value (per share)	—			0.01
Liquidation preference (per share)	—			25
Number of shares authorized	—			40,870,560
Number of shares issued and outstanding	—			27,870,560
Dividend/coupon
Prior to May 15, 2016	—		%	8.5		%
On and after May 15, 2016	—		%	Three month LIBOR + 6.243%

Series A Preferred Stock

On April 14, 2016, we issued a Notice of Redemption to the holders of the outstanding Series A Preferred Stock to redeem the remaining 27,870,560 shares at a redemption price of $25 per share, plus approximately $0.53 per share of accrued and unpaid dividends through the redemption date. On May 16, 2016, we redeemed the 27,870,560 outstanding shares of Series A Preferred Stock, with an aggregate liquidation preference of $697 million for $712 million in cash, which included $15 million in accrued and unpaid dividends through the redemption date. Upon redemption of the shares of Series A Preferred Stock, we derecognized the carrying value of $696 million. Effective May 16, 2016, the Series A Preferred Stock was retired.

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Accumulated Other Comprehensive (Loss) Income

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss) [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive (Loss) Income

The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income.

($ in millions)	Unrealized (losses) gains on investment securities (a)			Translation adjustments and net investment hedges (b)			Cash flow hedges		Defined benefit pension plans			Accumulated other comprehensive (loss) income
Balance at December 31, 2014	$	(21	)	$	36		$	7	$	(88	)	$	(66	)
2015 net change	(35		)	(21		)	—		—			(56		)
Balance at September 30, 2015	$	(56	)	$	15		$	7	$	(88	)	$	(122	)
Balance at December 31, 2015	$	(159	)	$	9		$	8	$	(89	)	$	(231	)
2016 net change	258			5			—		(1		)	262
Balance at September 30, 2016	$	99		$	14		$	8	$	(90	)	$	31

(a) Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

The following tables present the before- and after-tax changes in each component of accumulated other comprehensive (loss) income.

Three months ended September 30, 2016 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	41			$	(4	)		$	37
Less: Net realized gains reclassified to income from continuing operations	52			(a)	(11		)	(b)	41
Net change	(11		)		7				(4		)
Translation adjustments
Net unrealized losses arising during the period	(2		)		1				(1		)
Net investment hedges
Net unrealized gains arising during the period	2				(1		)		1
Other comprehensive loss	$	(11	)		$	7			$	(4	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Three months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	106			$	(41	)		$	65
Less: Net realized gains reclassified to income from continuing operations	6			(a)	(3		)	(b)	3
Net change	100				(38		)		62
Translation adjustments
Net unrealized losses arising during the period	(17		)		5				(12		)
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	(16		)		5				(11		)
Net investment hedges
Net unrealized gains arising during the period	15				(5		)		10
Other comprehensive income	$	99			$	(38	)		$	61

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Nine months ended September 30, 2016($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	506			$	(133	)		$	373
Less: Net realized gains reclassified to income from continuing operations	145			(a)	(30		)	(b)	115
Net change	361				(103		)		258
Translation adjustments
Net unrealized gains arising during the period	10				(4		)		6
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	11				(4		)		7
Net investment hedges
Net unrealized losses arising during the period	(4		)		2				(2		)
Defined benefit pension plans
Net unrealized losses arising during the period	(1		)		—				(1		)
Other comprehensive income	$	367			$	(105	)		$	262

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Nine months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	53			$	(21	)		$	32
Less: Net realized gains reclassified to income from continuing operations	106			(a)	(39		)	(b)	67
Net change	(53		)		18				(35		)
Translation adjustments
Net unrealized losses arising during the period	(33		)		11				(22		)
Less: Net realized gains reclassified to income from discontinued operations, net of tax	42				(20		)		22
Net change	(75		)		31				(44		)
Net investment hedges
Net unrealized gains arising during the period	31				(11		)		20
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(4		)		1				(3		)
Net change	35				(12		)		23
Other comprehensive loss	$	(93	)		$	37			$	(56	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

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Earnings per Common Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings per Common Share

The following table presents the calculation of basic and diluted earnings per common share.

	Three months ended September 30,						Nine months ended September 30,
($ in millions, except share data) (a)	2016			2015			2016			2015
Net income from continuing operations	$	261		$	273		$	865		$	621
Preferred stock dividends (b)	—			(38		)	(30		)	(1,356		)
Net income (loss) from continuing operations attributable to common shareholders	261			235			835			(735		)
(Loss) income from discontinued operations, net of tax	(52		)	(5		)	(46		)	405
Net income (loss) attributable to common shareholders	$	209		$	230		$	789		$	(330	)
Basic weighted-average common shares outstanding (c)	482,392,811			483,073,329			483,992,930			482,725,342
Diluted weighted-average common shares outstanding (c) (d)	483,575,307			484,399,091			484,762,142			482,725,342
Basic earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.73		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.48		$	1.63		$	(0.68	)
Diluted earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.72		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.47		$	1.63		$	(0.68	)

(a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

(b) Preferred stock dividends for the three months and nine months endedSeptember 30, 2015, include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized.

(c) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months endedSeptember 30, 2016, and 2015, respectively.

(d) Due to the antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months endedSeptember 30, 2015, basic weighted-average common shares outstanding was used to calculate basic and diluted earnings per share.

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Regulatory Capital and Other Regulatory Matters

9 Months Ended

Sep. 30, 2016

Regulatory Capital Requirements [Abstract]

Regulatory Capital Requirements under Banking Regulations [Text Block]

Regulatory Capital and Other Regulatory Matters

As a BHC, we and our wholly-owned state-chartered banking subsidiary, Ally Bank, are subject to capital requirements issued by U.S. banking regulators that require us to maintain risk-based and leverage capital ratios above minimum levels. A risk-based capital ratio is a ratio of a banking organization’s regulatory capital to its risk-weighted assets. A leverage capital ratio is a ratio of a banking organization’s regulatory capital to a measure of assets or exposures that is not risk-weighted. As of January 1, 2015, Ally and Ally Bank became subject to the rules implementing the 2010 Basel III capital framework in the United States (U.S. Basel III), which reflect new and higher capital requirements, capital buffers, and new regulatory capital definitions, deductions and adjustments. Certain aspects of U.S. Basel III, including the new capital buffers and regulatory capital deductions, will be phased in over several years.

Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary action by regulators that, if undertaken, could have a direct material effect on the Condensed Consolidated Financial Statements or the results of operations and financial condition of Ally and Ally Bank. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we and Ally Bank must meet specific capital guidelines that involve quantitative measures of capital, assets and certain off-balance sheet items. These measures and related classifications, which are used in the calculation of our risk-based and leverage capital ratios and those of Ally Bank, are also subject to qualitative judgments by the regulators about the components of capital, the risk-weightings of assets and other exposures, and other factors. The U.S. banking regulators also use these ratios and guidelines as part of the capital planning and stress testing processes. In addition, in order for Ally to maintain its status as a FHC, Ally and its bank subsidiary, Ally Bank, must remain “well-capitalized” and “well-managed,” as defined under applicable law. Effective January 1, 2015, the “well-capitalized” standard for insured depository institutions, such as Ally Bank, was revised to reflect the new and higher capital requirements under U.S. Basel III.

Under U.S. Basel III, Ally must maintain a minimum Common Equity Tier 1 risk-based capital ratio of4.5%, a minimum Tier 1 risk-based capital ratio of6%, and a minimum Total risk-based capital ratio of8%. In addition to these minimum requirements, Ally is also subject to a Common Equity Tier 1 capital conservation buffer of more than2.5%, subject to a phase-in from January 1, 2016 through December 31, 2018. Failure to maintain the full amount of the buffer will result in restrictions on Ally’s ability to make capital distributions, including dividend payment and stock repurchases and redemptions, and to pay discretionary bonuses to executive officers. In addition to these new risk-based capital standards, U.S. Basel III subjects all U.S. banking organizations, including Ally, to a minimum Tier 1 leverage ratio of 4%, the denominator of which takes into account only on-balance sheet assets.

In addition to introducing new capital ratios, U.S. Basel III revises the eligibility criteria for regulatory capital instruments and provides for the phase-out of instruments that had previously been recognized as capital but that do not satisfy the new criteria. Subject to certain exceptions (e.g., for certain debt or equity issued to the U.S. government under the Emergency Economic Stabilization Act), trust preferred and other “hybrid” securities are no longer included in a BHC's Tier 1 capital as of January 1, 2016. Also, subject to a phase-in schedule, certain new items are deducted from Common Equity Tier 1 capital, and certain other deductions from regulatory capital have been modified. Among other things, U.S. Basel III requires significant investments in the common shares of unconsolidated financial institutions, mortgage servicing rights, and certain deferred tax assets that exceed specified individual and aggregate thresholds to be deducted from Common Equity Tier 1 capital. U.S. Basel III also revises the standardized approach for calculating risk-weighted assets by, among other things, modifying certain risk weights and introducing new methods for calculating risk-weighted assets for certain types of assets and exposures.

Ally is subject to the U.S. Basel III standardized approach for credit risk. It is not subject to the U.S. Basel III advanced approaches for credit risk. Ally is currently not subject to the U.S. market risk capital rule, which applies only to banking organizations with significant trading assets and liabilities.

On March 7, 2016, Ally Bank received approval from the Federal Reserve to become a state member bank. Ally Bank is now regulated by the FRB through the Federal Reserve Bank of Chicago, as well as the Utah Department of Financial Institutions. In addition, in connection with the application for membership in the Federal Reserve System, Ally Bank made commitments to the FRB relating to capital, liquidity, and business plan requirements. These commitments are consistent with the prior requirements under the now-terminated Capital and Liquidity Maintenance Agreement with the Federal Deposit Insurance Corporation (FDIC), including the requirement to maintain capital at a level such that Ally Bank’s Tier 1 leverage ratio is at least 15%. For this purpose, the leverage ratio is determined in accordance with the FRB's regulations related to capital maintenance. As a requirement of Federal Reserve membership, on March 21, 2016, Ally Bank purchased $435 million of FRB stock.

Compliance with capital requirements is a strategic priority for Ally. We expect to be in compliance with all applicable requirements within the established timeframes.

The following table summarizes our capital ratios under the U.S. Basel III capital framework.

	September 30, 2016				December 31, 2015				Required minimum			Well-capitalized minimum
($ in millions)	Amount		Ratio		Amount		Ratio
Capital ratios
Common Equity Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	12,913	9.53	%	$	12,507	9.21	%	4.50	%		(a)
Ally Bank	17,537		17.21		16,594		17.05		4.50			6.50	%
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	15,087	11.13	%	$	15,077	11.10	%	6.00	%		6.00	%
Ally Bank	17,537		17.21		16,594		17.05		6.00			8.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	17,343	12.80	%	$	17,005	12.52	%	8.00	%		10.00	%
Ally Bank	18,069		17.73		17,043		17.51		8.00			10.00
Tier 1 leverage (to adjusted quarterly average assets) (b)
Ally Financial Inc.	$	15,087	9.73	%	$	15,077	9.73	%	4.00	%		(a)
Ally Bank	17,537		15.45		16,594		15.38		15.00		(c)	5.00	%

(a) Currently, there is no ratio component for determining whether a BHC is "well-capitalized."

(b) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology.

(c) Ally Bank has committed to the FRB to maintain a Tier 1 leverage ratio of at least 15%.

At September 30, 2016, Ally and Ally Bank were “well-capitalized” and met all capital requirements to which each was subject.

Capital Planning and Stress Tests

As a BHC with $50 billion or more of consolidated assets, Ally is required to conduct periodic company-run stress tests, is subject to an annual supervisory stress test conducted by the FRB, and must submit an annual capital plan to the FRB.

Ally’s capital plan must include a description of all planned capital actions over a nine-quarter planning horizon. The capital plan must also include a discussion of how Ally will maintain capital above the minimum regulatory capital ratios under baseline, adverse, and severely adverse economic scenarios, and serve as a source of strength to Ally Bank. The FRB must approve Ally's capital plan before Ally may take any capital action. Even with an approved capital plan, Ally must seek the approval of the FRB before making a capital distribution if, among other factors, Ally would not meet its regulatory capital requirements after making the proposed capital distribution.

On April 5, 2016, we submitted the results of our semi-annual stress test and our annual capital plan to the FRB. On June 23, 2016, we publicly disclosed summary results of the stress test under the most severe scenario in accordance with regulatory requirements. On June 29, 2016, we received a non-objection to our capital plan from the FRB, including the proposed capital actions contained in our submission. The proposed capital actions include a quarterly cash dividend of $0.08 per share of our common stock, subject to quarterly approval by the Board of Directors, and the ability to repurchase up to $700 million of our common stock from time to time through the second quarter of 2017. In addition, we submitted to the FRB the results of our company-run mid-year stress test conducted under multiple macroeconomic scenarios and disclosed the results of this stress test under the most severe scenario on October 5, 2016, in accordance with regulatory requirements.

On July 18, 2016, the Ally Board of Directors declared a quarterly cash dividend payment of $0.08 per share on all common stock. The dividend was paid on August 15, 2016, to shareholders of record at the close of business on August 1, 2016. On October 18, 2016, the Ally Board of Directors declared a second quarterly cash dividend payment of $0.08 per share on all common stock. Refer to Note 27 to the Condensed Consolidated Financial Statements for further information regarding this common share dividend. Additionally, the Ally Board of Directors authorized a common stock repurchase program of up to $700 million beginning in the third quarter of 2016 and continuing through the second quarter of 2017. During the third quarter of 2016, we repurchased $159 million, or 8,297,653 shares of common stock under this program which reduced total shares outstanding by approximately 1.7%. We had 475,469,882 shares of common stock outstanding at September 30, 2016.

In September 2016, the FRB proposed a rule that would, among other things, revise the capital plan rule to no longer subject large and noncomplex firms, including Ally, to the provisions of the existing rule whereby the FRB may object to a capital plan on the basis of qualitative deficiencies in the firm’s capital planning process. Under the proposed rule, the qualitative assessment of Ally’s capital plan would be conducted outside of the Comprehensive Capital Analysis and Review (CCAR) process, through the supervisory review process, and Ally’s reporting requirements would be modified to reduce certain reporting burdens related to capital planning and stress testing. The proposed rule would take effect for the 2017 capital planning cycle.

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Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

Derivative Instruments and Hedging Activities

We enter into interest rate, foreign-currency, and equity swaps, futures, forwards, options, and swaptions in connection with our market risk management activities. Derivative instruments are used to manage interest rate risk relating to specific groups of assets and liabilities, including automotive loan assets and debt. We use foreign exchange contracts to mitigate foreign-currency risk associated with foreign-currency-denominated debt, foreign exchange transactions, and our net investment in foreign subsidiaries. In addition, we also enter into equity option contracts to manage our exposure to the equity markets. Our primary objective for utilizing derivative financial instruments is to manage interest rate risk associated with our fixed- and variable-rate assets and liabilities, foreign exchange risks related to our foreign-currency denominated assets and liabilities, and market risks related to our investment portfolio and certain of our executive share-based compensation plans.

Interest Rate Risk

We monitor our mix of fixed- and variable-rate assets and liabilities. When it is cost-effective to do so, we may enter into interest rate swaps, forwards, futures, options, and swaptions to achieve our desired mix of fixed- and variable-rate assets and liabilities. We execute interest rate swaps, forwards, futures, options, and swaptions to modify our exposure to interest rate risk by converting certain fixed-rate instruments to a variable-rate and certain variable-rate instruments to a fixed-rate. We use a mix of both derivatives that qualify for hedge accounting treatment and economic hedges.

Derivatives qualifying for hedge accounting consist of receive-fixed swaps designated as fair value hedges of specific fixed-rate unsecured debt obligations, receive-fixed swaps designated as fair value hedges of specific fixed-rate FHLB advances and pay-fixed swaps designated as fair value hedges of specific portfolios of fixed-rate held-for-investment retail automotive loan assets. In 2015, we also had pay-fixed swaps designated as cash flow hedges of the expected future cash flows in the form of interest payments on certain outstanding variable-rate borrowings associated with our secured debt.

We also execute economic hedges, which consist of interest rate swaps and interest rate caps held to mitigate interest rate risk associated with our debt portfolio. We also use interest rate swaps to economically hedge our net fixed-versus-variable interest rate exposure. We enter into economic hedges in the form of short-dated, exchange-traded Eurodollar futures to hedge the interest rate exposure of our fixed-rate automotive loans, as well as forwards, options, and swaptions to economically hedge our net fixed-versus-variable interest rate exposure.

Foreign Exchange Risk

We enter into derivative financial instrument contracts to mitigate the risk associated with variability in cash flows related to our various foreign-currency exposures.

We enter into foreign-currency forwards with external counterparties as net investment hedges of foreign exchange exposure on our investments in foreign subsidiaries. Our equity is impacted by the cumulative translation adjustments resulting from the translation of foreign subsidiary results; this impact is reflected in our accumulated other comprehensive (loss) income. We also enter into foreign-currency forwards to economically hedge our foreign-denominated debt, our centralized lending program, and foreign-denominated third party loans. These forward currency forwards that are used as economic hedges are recorded at fair value with changes recorded as income offsetting the gains and losses on the associated foreign-currency transactions.

We utilized a cross-currency swap to economically hedge foreign exchange exposure on foreign-currency-denominated debt by converting the funding currency to our functional currency. This swap matured during the second quarter of 2015.

Market Risk

We enter into equity options to economically hedge our exposure to the equity markets. We purchase options to assume a long position on certain equities and write options to assume a short position.

We also enter into prepaid equity forward contracts to economically hedge the price risk associated with certain of our executive share-based compensation plans. The prepaid equity forward contracts are hybrid instruments containing an embedded forward contract, which is considered a derivative instrument. The embedded derivative instrument is bifurcated from the host contract and is recorded at fair value with changes in fair value recorded in compensation and benefits expense. The balance of the prepaid component of these equity forward contracts was $17 million as of September 30, 2016, and was recorded within other assets on the Condensed Consolidated Balance Sheet.

Counterparty Credit Risk

Derivative financial instruments contain an element of credit risk if counterparties are unable to meet the terms of the agreements. Credit risk associated with derivative financial instruments is measured as the net replacement cost should the counterparties that owe us under the contract completely fail to perform under the terms of those contracts, assuming no recoveries of underlying collateral as measured by the market value of the derivative financial instrument.

To mitigate the risk of counterparty default, we maintain collateral agreements with certain counterparties. The agreements require both parties to post collateral in the event the fair values of the derivative financial instruments meet posting thresholds established under the agreements. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls.

Certain derivative instruments contain provisions that require us to either post additional collateral or immediately settle any outstanding liability balances upon the occurrence of a specified credit risk-related event. No such specified credit risk related events occurred during the third quarter of 2016.

We placed cash collateral totaling $70 million and securities collateral totaling $49 million at September 30, 2016, and $103 million and $86 million at December 31, 2015, respectively, in accounts maintained by counterparties. This amount primarily relates to collateral posted to support our derivative positions. This amount also excludes cash and securities pledged as collateral under repurchase agreements. At September 30, 2016, and December 31, 2015, we placed cash collateral totaling $7 million and $21 million, respectively, with counterparties under collateral arrangements associated with repurchase agreements. Refer to Note 13 for details on the repurchase agreements. The receivables for cash collateral placed are included in our Condensed Consolidated Balance Sheet in other assets.

We received cash collateral from counterparties totaling $113 million at September 30, 2016, primarily to support these derivative positions. We received cash collateral from counterparties totaling $82 million at December 31, 2015. This amount also excludes cash and securities pledged as collateral under repurchase agreements. Refer to Note 13 for details on the repurchase agreements. The payables for cash collateral received are included on our Condensed Consolidated Balance Sheet in accrued expenses and other liabilities. In certain circumstances, we receive or post securities as collateral with counterparties. We do not record collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met. At September 30, 2016, and December 31, 2015, we received noncash collateral of $2 million and $7 million, respectively. Included in these amounts is noncash collateral where we have been granted the right to sell or pledge the underlying assets. We have not sold or pledged any of the noncash collateral received under these agreements.

Balance Sheet Presentation

The following table summarizes the fair value amounts of derivative instruments reported on our Condensed Consolidated Balance Sheet. The fair value amounts are presented on a gross basis, are segregated by derivatives that are designated and qualifying as hedging instruments or those that are not, and are further segregated by type of contract within those two categories. Notional amounts are reference amounts from which contractual obligations are derived and are not recorded on the balance sheet. In our view, derivative notional is not an accurate measure of our derivative exposure when viewed in isolation from other factors, such as market rate fluctuations and counterparty credit risk.

	September 30, 2016						December 31, 2015
	Derivative contracts in a				Notional amount		Derivative contracts in a				Notional amount
($ in millions)	receivable position (a)		payable position (b)				receivable position (a)		payable position (b)
Derivatives designated as accounting hedges
Interest rate contracts
Swaps (c) (d) (e)	$	114	$	7	$	6,754	$	126	$	9	$	14,151
Foreign exchange contracts
Forwards	—		—		221		—		1		189
Total derivatives designated as accounting hedges	114		7		6,975		126		10		14,340
Derivatives not designated as accounting hedges
Interest rate contracts
Swaps	5		15		864		30		51		6,101
Futures and forwards	—		—		—		2		2		1,905
Written options	—		20		15,206		—		72		18,220
Purchased options	21		—		15,206		73		—		18,240
Total interest rate risk	26		35		31,276		105		125		44,466
Foreign exchange contracts
Futures and forwards	1		—		111		—		—		278
Total foreign exchange risk	1		—		111		—		—		278
Equity contracts
Forwards	—		4		17		—		9		32
Written options	—		—		—		—		1		—
Purchased options	—		—		—		2		—		—
Total equity risk	—		4		17		2		10		32
Total derivatives not designated as accounting hedges	27		39		31,404		107		135		44,776
Total derivatives	$	141	$	46	$	38,379	$	233	$	145	$	59,116

(a) Derivative contracts in a receivable position are classified as other assets on the Condensed Consolidated Balance Sheet, and includes accrued interest of $7 million and $46 million at September 30, 2016, and December 31, 2015, respectively.

(b) Derivative contracts in a liability position are classified as accrued expenses and other liabilities on the Condensed Consolidated Balance Sheet, and includes accrued interest of $1 million and $12 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate unsecured debt obligations with $104 million and $112 million in a receivable position, $0 million and $3 million in a payable position, and a $2.3 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively. The hedge notional amount of $2.3 billion at September 30, 2016, is associated with debt maturing in five or more years.

(d) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate secured debt obligations (FHLB Advances) with $10 million and $1 million in a receivable position, $0 million and $2 million in a payable position, and a $898 million and $500 million notional amount at September 30, 2016, and December 31, 2015, respectively.

(e) Other fair value hedges include pay-fixed swaps on portfolios of held-for-investment automotive loan assets with $0 million and $13 million in a receivable position, $7 million and $3 million in a payable position, and a $3.5 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively.

Statement of Comprehensive Income Presentation

The following table summarizes the location and amounts of gains and losses on derivative instruments reported in our Condensed Consolidated Statement of Comprehensive Income.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Derivatives qualifying for hedge accounting
Gain (loss) recognized in earnings on derivatives
Interest rate contracts
Interest and fees on finance receivables and loans (a)	$	16		$	(34	)	$	(18	)	$	(50	)
Interest on long-term debt (b) (c)	(31		)	132			211			121
(Loss) gain recognized in earnings on hedged items
Interest rate contracts
Interest and fees on finance receivables and loans (d)	(17		)	38			16			73
Interest on long-term debt (e)	32			(135		)	(214		)	(128		)
Total derivatives qualifying for hedge accounting	—			1			(5		)	16
Derivatives not designated as accounting hedges
Loss recognized in earnings on derivatives
Interest rate contracts
Loss on mortgage and automotive loans, net	—			(2		)	—			(2		)
Other income, net of losses	(5		)	—			(2		)	(9		)
Total interest rate contracts	(5		)	(2		)	(2		)	(11		)
Foreign exchange contracts (f)
Interest on long-term debt	—			(1		)	(2		)	(139		)
Other income, net of losses	(1		)	1			(4		)	9
Total foreign exchange contracts	(1		)	—			(6		)	(130		)
Equity contracts
Compensation and benefits expense	2			(4		)	—			(7		)
Total equity contracts	2			(4		)	—			(7		)
Loss recognized in earnings on derivatives	$	(4	)	$	(5	)	$	(13	)	$	(132	)

(a) Amounts exclude losses related to interest for qualifying accounting hedges of retail automotive loans held-for-investment, which are primarily offset by the fixed coupon payments of the loans. The losses were $4 million and $18 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $16 million and $50 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(b) Amounts exclude gains related to interest for qualifying accounting hedges of unsecured debt, which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $7 million and $24 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $34 million and $71 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(c) Amounts exclude gains related to interest for qualifying accounting hedges of secured debt (FHLB Advances), which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $1 million for the three months endedSeptember 30, 2016, and $4 million for the nine months endedSeptember 30, 2016.

(d) Amounts exclude losses related to amortization of deferred loan basis adjustments on the de-designated hedged item of $6 million and $1 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $15 million and $1 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(e) Amounts exclude gains related to amortization of deferred debt basis adjustments on the de-designated hedged item of $23 million and $14 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $62 million and $59 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(f) Amounts exclude gains and losses related to the revaluation of the related foreign-denominated debt or receivable. Gains of $1 million were recognized for the three months endedSeptember 30, 2016, and 2015, and gains of $4 million and $134 million were recognized for the nine months endedSeptember 30, 2016, and 2015, respectively.

The following table summarizes derivative instruments used in cash flow and net investment hedge accounting relationships.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016			2015
Foreign exchange contracts
Loss reclassified from accumulated other comprehensive loss to income from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Total loss from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Gain (loss) recognized in other comprehensive income (a)	$	2	$	15	$	(4	)	$	35

(a) The amounts represent the effective portion of net investment hedges. There are offsetting amounts recognized in accumulated other comprehensive income (loss) related to the revaluation of the related net investment in foreign operations, including the tax impacts of the hedge and related net investment, as disclosed separately in Note 17. There were losses of $2 million and $16 million for the three months endedSeptember 30, 2016, and 2015, respectively. There were gains of $9 million and losses of $56 million for the nine months ended September 30, 2016, and 2015, respectively.

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Income Taxes

9 Months Ended

Sep. 30, 2016

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes

We recognized total income tax expense from continuing operations of $130 million and $336 million for the three months and nine months endedSeptember 30, 2016, compared to income tax expense of $144 million and $341 million for the same periods in 2015. The decrease in income tax expense for the three months ended September 30, 2016, compared to the same period in 2015, was primarily driven by lower pretax earnings. The decrease in income tax expense for the nine months ended September 30, 2016, compared to the same period in 2015, was primarily driven by a tax benefit that resulted from a U.S. tax reserve release related to a prior year federal return that reduced our liability for unrecognized tax benefits. This tax benefit was offset by increases in tax expense attributable to higher pretax earnings and the establishment of a valuation allowance on capital loss carryforwards.

As of each reporting date, we consider existing evidence, both positive and negative, that could impact our view with regard to future realization of deferred tax assets. We continue to believe it is more likely than not that the benefit for capital loss carryforwards, certain foreign tax credits and state net operating loss carryforwards will not be realized. In recognition of this risk, we continue to provide a full valuation allowance on capital loss carryforwards and a partial valuation allowance on the deferred tax assets relating to foreign tax credits and state net operating loss carryforwards.

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Fair Value

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

Fair Value

Fair Value Measurements

For purposes of this disclosure, fair value is defined as the exchange price that would be received to sell an asset or paid to transfer a liability (exit price) in the principal or most advantageous market in an orderly transaction between market participants at the measurement date under current market conditions. Fair value is based on the assumptions we believe market participants would use when pricing an asset or liability. Additionally, entities are required to consider all aspects of nonperformance risk, including the entity’s own credit standing, when measuring the fair value of a liability.

GAAP specifies a three-level hierarchy that is used when measuring and disclosing fair value. The fair value hierarchy gives the highest priority to quoted prices available in active markets (i.e., observable inputs) and the lowest priority to data lacking transparency (i.e., unobservable inputs). An instrument’s categorization within the fair value hierarchy is based on the lowest level of significant input to its valuation. The following is a description of the three hierarchy levels.

Level 1 Inputs are quoted prices in active markets for identical assets or liabilities at the measurement date. Additionally, the entity must have the ability to access the active market, and the quoted prices cannot be adjusted by the entity.

Level 2 Inputs are other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices in active markets for similar assets or liabilities; quoted prices in inactive markets for identical or similar assets or liabilities; or inputs that are observable or can be corroborated by observable market data by correlation or other means for substantially the full term of the assets or liabilities.

Level 3 Unobservable inputs are supported by little or no market activity. The unobservable inputs represent management's best assumptions of how market participants would price the assets or liabilities. Generally, Level 3 assets and liabilities are valued using pricing models, discounted cash flow methodologies, or similar techniques that require significant judgment or estimation.

Transfers Transfers into or out of any hierarchy level are recognized at the end of the reporting period in which the transfer occurred. There were no transfers between any levels for the nine months endedSeptember 30, 2016.

Following are descriptions of the valuation methodologies used to measure material assets and liabilities at fair value and details of the valuation models, key inputs to those models, and significant assumptions utilized.

• Available-for-sale securities — All classes of available-for-sale securities are carried at fair value based on observable market prices, when available. If observable market prices are not available, our valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate and consider recent market transactions, experience with similar securities, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we are required to utilize various significant assumptions including market observable inputs (e.g., forward interest rates) and internally developed inputs (including prepayment speeds, delinquency levels, and credit losses).

• Interests retained in financial asset sales — Includes certain noncertificated interests retained from the sale of automotive finance receivables. Due to inactivity in the market, valuations are based on internally developed discounted cash flow models (an income approach) that use a market-based discount rate; therefore, we classified these assets as Level 3. The valuation considers recent market transactions, experience with similar assets, current business conditions, and analysis of the underlying collateral, as available. To estimate cash flows, we utilize various significant assumptions, including market observable inputs (e.g., forward interest rates) and internally developed inputs (e.g., prepayment speeds, delinquency levels, and credit losses).

• Derivative instruments — We enter into a variety of derivative financial instruments as part of our risk management strategies. Certain of these derivatives are exchange traded, such as Eurodollar futures, options of Eurodollar futures, and equity options. To determine the fair value of these instruments, we utilize the quoted market prices for the particular derivative contracts; therefore, we classified these contracts as Level 1.

We also execute over-the-counter (OTC) and centrally-cleared derivative contracts, such as interest rate swaps, a cross-currency swap, swaptions, foreign-currency denominated forward contracts, prepaid equity forward contracts, caps, floors, and agency to-be-announced securities. For OTC contracts, we utilize third-party-developed valuation models that are widely accepted in the market to value these OTC derivative contracts. The specific terms of the contract and market observable inputs (such as interest rate forward curves, interpolated volatility assumptions, or equity pricing) are used in the model. We classified these OTC derivative contracts as Level 2 because all significant inputs into these models were market observable. For centrally-cleared contracts, we utilize unadjusted prices obtained from the clearing house as the basis for valuation, and they are also classified as Level 2. We did not have any derivative instruments classified as Level 3 as of September 30, 2016, or December 31, 2015.

We are required to consider all aspects of nonperformance risk, including our own credit standing, when measuring fair value of a liability. We reduce credit risk on the majority of our derivatives by entering into legally enforceable agreements that enable the posting and receiving of collateral associated with the fair value of our derivative positions on an ongoing basis. In the event that we do not enter into legally enforceable agreements that enable the posting and receiving of collateral, we will consider our credit risk and the credit risk of our counterparties in the valuation of derivative instruments through a credit valuation adjustment (CVA), if warranted. The CVA calculation utilizes the credit default swap spreads of the counterparty.

Recurring Fair Value

The following tables display the assets and liabilities measured at fair value on a recurring basis including financial instruments elected for the fair value option. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The tables below display the hedges separately from the hedged items; therefore, they do not directly display the impact of our risk management activities.

	Recurring fair value measurements
September 30, 2016($ in millions)	Level 1		Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	321	$	—		$	—	$	321
U.S. States and political subdivisions	—		763			—		763
Foreign government	11		169			—		180
Mortgage-backed residential	—		12,143			—		12,143
Mortgage-backed commercial	—		524			—		524
Asset-backed	—		1,570			—		1,570
Corporate debt	—		1,630			—		1,630
Total debt securities	332		16,799			—		17,131
Equity securities (a)	570		—			—		570
Total available-for-sale securities	902		16,799			—		17,701
Other assets
Interests retained in financial asset sales	—		—			32		32
Derivative contracts in a receivable position (b)
Interest rate	—		140			—		140
Foreign currency	—		1			—		1
Total derivative contracts in a receivable position	—		141			—		141
Total assets	$	902	$	16,940		$	32	$	17,874
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	—	$	(42	)	$	—	$	(42	)
Other	—		(4		)	—		(4		)
Total derivative contracts in a payable position	—		(46		)	—		(46		)
Total liabilities	$	—	$	(46	)	$	—	$	(46	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

	Recurring fair value measurements
December 31, 2015 ($ in millions)	Level 1			Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	1,469		$	272		$	—	$	1,741
U.S. States and political subdivisions	—			716			—		716
Foreign government	10			167			—		177
Mortgage-backed residential	—			10,366			—		10,366
Mortgage-backed commercial	—			481			—		481
Asset-backed	—			1,755			—		1,755
Corporate debt	—			1,204			—		1,204
Total debt securities	1,479			14,961			—		16,440
Equity securities (a)	717			—			—		717
Total available-for-sale securities	2,196			14,961			—		17,157
Other assets
Interests retained in financial asset sales	—			—			40		40
Derivative contracts in a receivable position (b)
Interest rate	2			229			—		231
Other	2			—			—		2
Total derivative contracts in a receivable position	4			229			—		233
Total assets	$	2,200		$	15,190		$	40	$	17,430
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	(2	)	$	(133	)	$	—	$	(135	)
Foreign currency	—			(1		)	—		(1		)
Other	(1		)	(8		)	—		(9		)
Total derivative contracts in a payable position	(3		)	(142		)	—		(145		)
Total liabilities	$	(3	)	$	(142	)	$	—	$	(145	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

The following tables present the reconciliation for all Level 3 assets and liabilities measured at fair value on a recurring basis. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The Level 3 items presented below may be hedged by derivatives and other financial instruments that are classified as Level 1 or Level 2. Thus, the following tables do not fully reflect the impact of our risk management activities.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at July 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	31	$	1	(a)	$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—
Total assets	$	31	$	1		$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at July 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	4	$	—	(a)	$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	32		1		(a)	—		—		—			1		(5		)	29		—
Total assets	$	36	$	1		$	—	$	—	$	(4	)	$	1	$	(5	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at Jan. 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	40	$	4	(a)	$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—
Total assets	$	40	$	4		$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at Jan. 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	3	$	1		$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	47		8		(a)	—		—		—			2		(28		)	29		—
Total assets	$	50	$	9		$	—	$	—	$	(4	)	$	2	$	(28	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

Nonrecurring Fair Value

We may be required to measure certain assets and liabilities at fair value from time to time. These periodic fair value measures typically result from the application of lower-of-cost or fair value accounting or certain impairment measures. These items would constitute nonrecurring fair value measures.

The following tables display the assets and liabilities measured at fair value on a nonrecurring basis.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2016($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net	$	—	$	—	$	56	$	56	$	—		n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		30		30		(7		)	n/m	(a)	n/m	(a)
Other	—		—		45		45		(17		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		75		75		(24		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		15		15		(4		)	n/m	(a)	n/m	(a)
Other	—		—		7		7		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	153	$	153	$	(28	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2016. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2015 ($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net
Other	$	—	—		37		37		—			n/m	(a)	n/m	(a)
Total loans held-for-sale, net	—		—		37		37		—			n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		13		13		(4		)	n/m	(a)	n/m	(a)
Other	—		—		30		30		(15		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		43		43		(19		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		9		9		(3		)	n/m	(a)	n/m	(a)
Other	—		—		2		2		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	91	$	91	$	(22	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2015. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

Fair Value Option for Financial Assets

We elected the fair value option for an insignificant amount of conforming and government-insured mortgage loans held-for-sale. We elected the fair value option to mitigate earnings volatility by better matching the accounting for the assets with the related hedges. Our intent in electing fair value measurement was to mitigate a divergence between accounting losses and economic exposure for certain assets and liabilities.

Fair Value of Financial Instruments

The following table presents the carrying and estimated fair value of financial instruments, except for those recorded at fair value on a recurring basis presented in the previous section of this note titled Recurring Fair Value. When possible, we use quoted market prices to determine fair value. Where quoted market prices are not available, the fair value is internally derived based on appropriate valuation methodologies with respect to the amount and timing of future cash flows and estimated discount rates. However, considerable judgment is required in interpreting current market data to develop the market assumptions and inputs necessary to estimate fair value. As such, the actual amount received to sell an asset or the amount paid to settle a liability could differ from our estimates. Fair value information presented herein was based on information available at September 30, 2016, and December 31, 2015.

			Estimated fair value
($ in millions)	Carrying value		Level 1		Level 2		Level 3		Total
September 30, 2016
Financial assets
Held-to-maturity securities	$	649	$	—	$	658	$	—	$	658
Loans held-for-sale, net	56		—		—		56		56
Finance receivables and loans, net	113,825		—		—		114,847		114,847
Nonmarketable equity investments	818		—		787		50		837
Financial liabilities
Deposit liabilities	$	75,744	$	—	$	—	$	76,231	$	76,231
Short-term borrowings	6,434		—		—		6,435		6,435
Long-term debt	56,836		—		22,405		36,790		59,195
December 31, 2015
Financial assets
Loans held-for-sale, net	$	105	$	—	$	—	$	105	$	105
Finance receivables and loans, net	110,546		—		—		110,737		110,737
Nonmarketable equity investments	418		—		391		42		433
Financial liabilities
Deposit liabilities	$	66,478	$	—	$	—	$	66,889	$	66,889
Short-term borrowings	8,101		—		—		8,102		8,102
Long-term debt	66,234		—		23,018		45,157		68,175

The following describes the methodologies and assumptions used to determine fair value for the significant classes of financial instruments. In addition to the valuation methods discussed below, we also followed guidelines for determining whether a market was not active and a transaction was not distressed. We assumed the price that would be received in an orderly transaction (including a market-based return) and not in forced liquidation or distressed sale.

• Cash and cash equivalents — Included in cash and cash equivalents are highly liquid investments that are readily convertible to known amounts of cash and which are subject to an insignificant risk of change in value due to interest rate, quoted price, or penalty on withdrawal. Classified as Level 1 under the fair value hierarchy, cash and cash equivalents generally expose us to limited credit risk and are so near maturity that they present insignificant risk of changes in value because of changes in interest rates. Accordingly, the carrying value approximates the fair value of these instruments.

• Held-to-maturity securities — Held-to-maturity securities, which consist of residential mortgage-backed debt securities issued by government agencies, are carried at amortized cost. For fair value disclosure purposes, held-to-maturity securities are classified as Level 2, with fair value based on observable market prices, when available.

• Finance receivables and loans, net — With the exception of mortgage loans held-for-investment, the fair value of finance receivables and loans was based on discounted future cash flows using applicable spreads to approximate current rates applicable to each category of finance receivables and loans (an income approach using Level 3 inputs). The carrying value of commercial receivables in certain markets and certain automotive and other receivables for which interest rates reset on a short-term basis with applicable market indices are assumed to approximate fair value either because of the short-term nature or because of the interest rate adjustment feature. The fair value of commercial receivables in other markets was based on discounted future cash flows using applicable spreads to approximate current rates applicable to similar assets in those markets.

The fair value of mortgage loans held-for-investment was based on a discounted cash flow basis utilizing cash flow projections from internally developed models that utilized prepayment, default, and discount rate assumptions. These valuations consider unique attributes of the loans such as geography, delinquency status, product type, and other factors.

• Nonmarketable equity investments — Nonmarketable equity investments primarily include investments in FHLB and FRB stock and other equity investments carried at cost. As a member of the FHLB and FRB, Ally Bank is required to hold FHLB and FRB stock. The stock can be sold only to the FHLB and FRB upon termination of membership, or redeemed at the sole discretion of the FHLB and FRB, respectively. The fair value of FHLB and FRB stock is equal to the stock’s par value since the stock is bought, sold, and/or redeemed at par. FHLB and FRB stock is carried at cost, which generally represents the stock’s par value.

• Deposit liabilities — Deposit liabilities represent certain consumer and brokered bank deposits, mortgage escrow deposits, and dealer deposits. The fair value of deposits at Level 3 were estimated by discounting projected cash flows based on discount factors derived from the forward interest rate swap curve.

• Short-term borrowings and Long-term debt — Level 2 debt was valued using quoted market prices for similar instruments, when available, or other means for substantiation with observable inputs. Debt valued by discounting projected cash flows using internally derived inputs, such as prepayment speeds and discount rates, was classified as Level 3.

• Financial instruments for which carrying value approximates fair value — Certain financial instruments that are not carried at fair value on the consolidated balance sheet are carried at amounts that approximate fair value primarily due to their short term nature and limited credit risk. These instruments include restricted cash, cash collateral, accrued interest receivable, accrued interest payable, trade receivables and payables, and other short term receivables and payables.

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Offsetting Assets and Liabilities Offsetting Assets and Liabilities

9 Months Ended

Sep. 30, 2016

Offsetting Assets and Liabilities [Abstract]

Offsetting Assets and Liabilities [Text Block]

Offsetting Assets and Liabilities

Our derivative contracts and repurchase/reverse repurchase transactions are supported by qualifying master netting and master repurchase agreements. These agreements are legally enforceable bilateral agreements that (1) create a single legal obligation for all individual transactions covered by the agreement to the nondefaulting entity upon an event of default of the counterparty, including bankruptcy, insolvency, or similar proceeding, and (2) provide the nondefaulting entity the right to accelerate, terminate, and close-out on a net basis all transactions under the agreement and to liquidate or set off collateral promptly upon an event of default of the counterparty.

To further mitigate the risk of counterparty default related to derivative instruments, we maintain collateral agreements with certain counterparties. The agreements require both parties to maintain collateral in the event the fair values of the derivative financial instruments meet established thresholds. In the event that either party defaults on the obligation, the secured party may seize the collateral. Generally, our collateral arrangements are bilateral such that we and the counterparty post collateral for the value of our total obligation to each other. Contractual terms provide for standard and customary exchange of collateral based on changes in the market value of the outstanding derivatives. The securing party posts additional collateral when their obligation rises or removes collateral when it falls, such that the net replacement cost of the nondefaulting party is covered in the event of counterparty default.

In certain instances as it relates to our derivative instruments, we have the option to report derivative assets and liabilities as well as assets and liabilities associated with cash collateral received or delivered that is governed by a master netting agreement on a net basis as long as certain qualifying criteria are met. Similarly, for our repurchase/reverse repurchase transactions, we have the option to report recognized assets and liabilities subject to a master netting agreement on a net basis if certain qualifying criteria are met. At September 30, 2016, these instruments are reported as gross assets and gross liabilities on the Condensed Consolidated Balance Sheet.

The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
September 30, 2016($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	140		$	—	$	140		$	(15	)	$	(104	)	$	21
Derivative assets in net liability positions	1			—		1			(1		)	—			—
Total assets (d)	$	141		$	—	$	141		$	(16	)	$	(104	)	$	21
Liabilities
Derivative liabilities in net liability positions	$	(28	)	$	—	$	(28	)	$	—		$	7		$	(21	)
Derivative liabilities in net asset positions	(15		)	—		(15		)	15			—			—
Derivative liabilities with no offsetting arrangements	(3		)	—		(3		)	—			—			(3		)
Total derivative liabilities (d)	(46		)	—		(46		)	15			7			(24		)
Securities sold under agreements to repurchase (e)	(659		)	—		(659		)	—			659			—
Total liabilities	$	(705	)	$	—	$	(705	)	$	15		$	666		$	(24	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $2 million of noncash derivative collateral pledged to us was excluded at September 30, 2016. We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $2 million at September 30, 2016. We have not sold or pledged any of the noncash collateral received under these agreements as of September 30, 2016.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
December 31, 2015 ($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	224		$	—	$	224		$	(69	)	$	(67	)	$	88
Derivative assets in net liability positions	9			—		9			(9		)	—			—
Total assets (d)	$	233		$	—	$	233		$	(78	)	$	(67	)	$	88
Liabilities
Derivative liabilities in net liability positions	$	(68	)	$	—	$	(68	)	$	9		$	2		$	(57	)
Derivative liabilities in net asset positions	(69		)	—		(69		)	69			—			—
Derivative liabilities with no offsetting arrangements	(8		)	—		(8		)	—			—			(8		)
Total derivative liabilities (d)	(145		)	—		(145		)	78			2			(65		)
Securities sold under agreements to repurchase (e)	(648		)	—		(648		)	—			648			—
Total liabilities	$	(793	)	$	—	$	(793	)	$	78		$	650		$	(65	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $7 million of noncash derivative collateral pledged to us was excluded at December 31, 2015. We do not record such collateral received on our Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $7 million at December 31, 2015. We have not sold or pledged any of the noncash collateral received under these agreements as of December 31, 2015.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

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Segment and Geographic Information

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Segment and Geographic Information

Operating segments are defined as components of an enterprise that engage in business activity from which revenues are earned and expenses incurred for which discrete financial information is available that is evaluated regularly by our chief operating decision maker in deciding how to allocate resources and in assessing performance.

Change in Reportable Segments

As a result of a change in how management views and operates our business, during the first quarter of 2016, we made changes in the composition of our operating segments. Financial information related to our Corporate Finance business is presented as a separate reportable segment. Previously, all such activity was included in Corporate and Other. Additionally, only the activity of our ongoing bulk acquisitions of mortgage loans and other originations and refinancing is presented in Mortgage Finance operations. The activity related to the management of our legacy mortgage portfolio is included in Corporate and Other. Our other operating segments, Automotive Finance operations and Insurance operations, were unchanged. Amounts for 2015 have been adjusted to conform to the current management view.

We report our results of operations on a line-of-business basis through four operating segments: Automotive Finance operations, Insurance operations, Mortgage Finance operations, and Corporate Finance operations, with the remaining activity reported in Corporate and Other. The operating segments are determined based on the products and services offered, and reflect the manner in which financial information is currently evaluated by management. The following is a description of each of our reportable operating segments.

Automotive Finance operations— Provides automotive financing services to consumers and automotive dealers. Our automotive financing services include providing retail installment sales financing, loans, and leases; offering term loans to dealers, financing dealer floorplans and other lines of credit to dealers; fleet financing, and vehicle remarketing services.

Insurance operations — Offers both consumer finance protection and insurance products sold primarily through the automotive dealer channel, and commercial insurance products sold to dealers. As part of our focus on offering dealers a broad range of consumer financial and insurance products, we provide vehicle service contracts, maintenance coverage, and guaranteed asset protection products. We also underwrite selected commercial insurance coverages, which primarily insure dealers' vehicle inventories.

Mortgage Finance operations — Includes the management of a held-for-investment consumer mortgage finance loan portfolio and is primarily comprised of high-quality jumbo and low-to-moderate income mortgage loans purchased or originated after January 1, 2009.

Corporate Finance operations — Primarily provides senior secured leveraged cash flow and asset-based loans to mostly U.S.-based middle market companies. The loans are used to support leveraged buyouts, mergers and acquisitions, debt refinancing, restructurings, and working capital.

Corporate and Other primarily consists of activity related to centralized corporate treasury activities such as management of the cash and corporate investment securities and loan portfolios, short- and long-term debt, retail and brokered deposit liabilities, derivative instruments, the amortization of the discount associated with new debt issuances and bond exchanges, and the residual impacts of our corporate funds-transfer pricing (FTP) and treasury asset liability management (ALM) activities. Corporate and Other also includes certain equity investments, the management of our legacy mortgage portfolio, and reclassifications and eliminations between the reportable operating segments. Additionally, beginning in June 2016, financial information related to TradeKing is included within Corporate and Other.

We utilize an FTP methodology for the majority of our business operations. The FTP methodology assigns charge rates and credit rates to classes of assets and liabilities based on expected duration and the benchmark rate curve plus an assumed credit spread. Matching duration allocates interest income and interest expense to these reportable segments so their respective results are insulated from interest rate risk. This methodology is consistent with our ALM practices, which includes managing interest rate risk centrally at a corporate level. The net residual impact of the FTP methodology is included within the results of Corporate and Other.

The information presented in our reportable operating segments and geographic areas tables that follow are based in part on internal allocations, which involve management judgment.

Financial information for our reportable operating segments is summarized as follows.

Three months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	933	$	14	$	25	$	30	$	(6	)	$	996
Other revenue	74		264		—		4		46			388
Total net revenue	1,007		278		25		34		40			1,384
Provision for loan losses	270		—		1		3		(16		)	258
Total noninterest expense	418		222		16		16		63			735
Income (loss) from continuing operations before income tax expense	$	319	$	56	$	8	$	15	$	(7	)	$	391
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	870	$	16	$	17	$	22	$	45		$	970
Other revenue	63		233		—		10		26			332
Total net revenue	933		249		17		32		71			1,302
Provision for loan losses	201		—		3		4		3			211
Total noninterest expense	409		209		10		14		32			674
Income from continuing operations before income tax expense	$	323	$	40	$	4	$	14	$	36		$	417
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $738 million and $759 million for the three months endedSeptember 30, 2016, and 2015, respectively.

Nine months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	2,758	$	44	$	71	$	87	$	(29	)	$	2,931
Other revenue	228		777		—		14		119			1,138
Total net revenue	2,986		821		71		101		90			4,069
Provision for loan losses	649		—		4		12		(15		)	650
Total noninterest expense	1,255		733		48		49		133			2,218
Income (loss) from continuing operations before income tax expense	$	1,082	$	88	$	19	$	40	$	(28	)	$	1,201
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	2,529	$	42	$	39	$	64	$	62		$	2,736
Other revenue (loss)	170		769		—		22		(175		)	786
Total net revenue (loss)	2,699		811		39		86		(113		)	3,522
Provision for loan losses	460		—		9		3		(5		)	467
Total noninterest expense	1,237		678		28		42		108			2,093
Income (loss) from continuing operations before income tax expense	$	1,002	$	133	$	2	$	41	$	(216	)	$	962
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $2,281 million and $2,269 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

Information concerning principal geographic areas was as follows.

Three months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss)
2016
Canada	$	22	$	10	$	9
Europe	—		—		(1		)
Latin America	—		—		(1		)
Total foreign (b)	22		10		7
Total domestic (c)	1,362		381		202
Total	$	1,384	$	391	$	209
2015
Canada	$	24	$	11	$	9
Europe	—		1		—
Total foreign (b)	24		12		9
Total domestic (c)	1,278		405		259
Total	$	1,302	$	417	$	268

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(c) Amounts include eliminations between our domestic and foreign operations.

Nine months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss) (b)
2016
Canada	$	67	$	32	$	27
Europe	—		—		(4		)
Latin America	—		—		(1		)
Total foreign (c)	67		32		22
Total domestic (d)	4,002		1,169		797
Total	$	4,069	$	1,201	$	819
2015
Canada	$	76	$	35	$	30
Europe	1		5		28
Asia-Pacific	—		—		452
Total foreign (c)	77		40		510
Total domestic (d)	3,445		922		516
Total	$	3,522	$	962	$	1,026

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated.

(c) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(d) Amounts include eliminations between our domestic and foreign operations.

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Parent and Guarantor Consolidating Financial Statements

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Condensed Guarantor Financial Statements [Text Block]

Parent and Guarantor Condensed Consolidating Financial Statements

Certain of our senior notes issued by the parent are guaranteed by 100% directly owned subsidiaries of Ally (the Guarantors). As of September 30, 2016, the Guarantors include Ally US LLC and IB Finance Holding Company, LLC (IB Finance), each of which fully and unconditionally guarantee the senior notes on a joint and several basis.

The following financial statements present condensed consolidating financial data for (i) Ally Financial Inc. (on a parent company-only basis); (ii) the Guarantors; (iii) the nonguarantor subsidiaries (all other subsidiaries); and (iv) an elimination column for adjustments to arrive at (v) the information for the parent company, the Guarantors, and nonguarantors on a consolidated basis.

Investments in subsidiaries are accounted for by the parent company and the Guarantors using the equity-method for this presentation. Results of operations of subsidiaries are therefore classified in the parent company’s and Guarantors’ investment in subsidiaries accounts. The elimination entries set forth in the following condensed consolidating financial statements eliminate distributed and undistributed income of subsidiaries, investments in subsidiaries, and intercompany balances and transactions between the parent, the Guarantors, and nonguarantors.

Condensed Consolidating Statements of Comprehensive Income

Three months ended September 30, 2016 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(15	)	$	—		$	1,322		$	—		$	1,307
Interest and fees on finance receivables and loans — intercompany	2			—			2			(4		)	—
Interest and dividends on investment securities	—			—			102			(1		)	101
Interest on cash and cash equivalents	1			—			2			—			3
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	4			—			645			—			649
Total financing revenue and other interest income	(8		)	—			2,075			(7		)	2,060
Interest expense
Interest on deposits	2			—			210			—			212
Interest on short-term borrowings	10			—			4			—			14
Interest on long-term debt	289			—			141			—			430
Interest on intercompany debt	5			—			2			(7		)	—
Total interest expense	306			—			357			(7		)	656
Depreciation expense on operating lease assets	3			—			405			—			408
Net financing (loss) revenue	(317		)	—			1,313			—			996
Cash dividends from subsidiaries
Nonbank subsidiaries	170			—			—			(170		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			238			—			238
(Loss) gain on mortgage and automotive loans, net	(7		)	—			7			—			—
Other gain on investments, net	—			—			52			—			52
Other income, net of losses	298			—			231			(431		)	98
Total other revenue	291			—			528			(431		)	388
Total net revenue	144			—			1,841			(601		)	1,384
Provision for loan losses	147			—			111			—			258
Noninterest expense
Compensation and benefits expense	143			—			105			—			248
Insurance losses and loss adjustment expenses	—			—			69			—			69
Other operating expenses	307			—			541			(430		)	418
Total noninterest expense	450			—			715			(430		)	735
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	(453		)	—			1,015			(171		)	391
Income tax (benefit) expense from continuing operations	(88		)	—			218			—			130
Net (loss) income from continuing operations	(365		)	—			797			(171		)	261
Loss from discontinued operations, net of tax	(47		)	—			(5		)	—			(52		)
Undistributed income of subsidiaries
Bank subsidiary	325			325			—			(650		)	—
Nonbank subsidiaries	296			—			—			(296		)	—
Net income	209			325			792			(1,117		)	209
Other comprehensive loss, net of tax	(4		)	(3		)	(9		)	12			(4		)
Comprehensive income	$	205		$	322		$	783		$	(1,105	)	$	205

Three months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(33	)	$	—		$	1,199		$	—		$	1,166
Interest and fees on finance receivables and loans — intercompany	3			—			1			(4		)	—
Interest on loans held-for-sale	—			—			2			—			2
Interest and dividends on investment securities	—			—			102			—			102
Interest on cash and cash equivalents	—			—			2			—			2
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	1			—			829			—			830
Total financing revenue and other interest income	(29		)	—			2,137			(6		)	2,102
Interest expense
Interest on deposits	3			—			178			—			181
Interest on short-term borrowings	10			—			3			—			13
Interest on long-term debt	272			—			138			—			410
Interest on intercompany debt	3			—			3			(6		)	—
Total interest expense	288			—			322			(6		)	604
Depreciation expense on operating lease assets	1			—			527			—			528
Net financing (loss) revenue	(318		)	—			1,288			—			970
Cash dividends from subsidiaries
Nonbank subsidiaries	494			—			—			(494		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			236			—			236
Loss on mortgage and automotive loans, net	(1		)	—			(1		)	—			(2		)
Other gain on investments, net	—			—			6			—			6
Other income, net of losses	367			—			329			(604		)	92
Total other revenue	366			—			570			(604		)	332
Total net revenue	542			—			1,858			(1,098		)	1,302
Provision for loan losses	48			—			163			—			211
Noninterest expense
Compensation and benefits expense	138			—			212			(115		)	235
Insurance losses and loss adjustment expenses	—			—			61			—			61
Other operating expenses	315			—			552			(489		)	378
Total noninterest expense	453			—			825			(604		)	674
Income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	41			—			870			(494		)	417
Income tax (benefit) expense from continuing operations	(30		)	—			174			—			144
Net income from continuing operations	71			—			696			(494		)	273
Loss from discontinued operations, net of tax	(5		)	—			—			—			(5		)
Undistributed income (loss) income of subsidiaries
Bank subsidiary	254			254			—			(508		)	—
Nonbank subsidiaries	(52		)	(1		)	—			53			—
Net income	268			253			696			(949		)	268
Other comprehensive income, net of tax	61			65			55			(120		)	61
Comprehensive income	$	329		$	318		$	751		$	(1,069	)	$	329

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(82	)	$	—		$	3,889		$	—		$	3,807
Interest and fees on finance receivables and loans — intercompany	8			—			6			(14		)	—
Interest and dividends on investment securities	—			—			303			(1		)	302
Interest on cash and cash equivalents	4			—			6			—			10
Interest-bearing cash — intercompany	—			—			7			(7		)	—
Operating leases	14			—			2,105			—			2,119
Total financing revenue and other interest income	(56		)	—			6,316			(22		)	6,238
Interest expense
Interest on deposits	6			—			602			—			608
Interest on short-term borrowings	31			—			8			—			39
Interest on long-term debt	868			—			440			—			1,308
Interest on intercompany debt	14			—			8			(22		)	—
Total interest expense	919			—			1,058			(22		)	1,955
Depreciation expense on operating lease assets	11			—			1,341			—			1,352
Net financing (loss) revenue	(986		)	—			3,917			—			2,931
Cash dividends from subsidiaries
Nonbank subsidiaries	800			—			—			(800		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			704			—			704
(Loss) gain on mortgage and automotive loans, net	(11		)	—			15			—			4
Loss on extinguishment of debt	(2		)	—			(2		)	—			(4		)
Other gain on investments, net	—			—			145			—			145
Other income, net of losses	989			—			661			(1,361		)	289
Total other revenue	976			—			1,523			(1,361		)	1,138
Total net revenue	790			—			5,440			(2,161		)	4,069
Provision for loan losses	295			—			355			—			650
Noninterest expense
Compensation and benefits expense	430			—			312			—			742
Insurance losses and loss adjustment expenses	—			—			287			—			287
Other operating expenses	963			—			1,586			(1,360		)	1,189
Total noninterest expense	1,393			—			2,185			(1,360		)	2,218
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(898		)	—			2,900			(801		)	1,201
Income tax (benefit) expense from continuing operations	(196		)	(82		)	614			—			336
Net (loss) income from continuing operations	(702		)	82			2,286			(801		)	865
Loss from discontinued operations, net of tax	(39		)	—			(7		)	—			(46		)
Undistributed income (loss) of subsidiaries
Bank subsidiary	932			932			—			(1,864		)	—
Nonbank subsidiaries	628			(2		)	—			(626		)	—
Net income	819			1,012			2,279			(3,291		)	819
Other comprehensive income, net of tax	262			143			234			(377		)	262
Comprehensive income	$	1,081		$	1,155		$	2,513		$	(3,668	)	$	1,081

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(45	)	$	—		$	3,403		$	—		$	3,358
Interest and fees on finance receivables and loans — intercompany	15			—			22			(37		)	—
Interest on loans held-for-sale	—			—			40			—			40
Interest and dividends on investment securities	—			—			283			—			283
Interest on cash and cash equivalents	1			—			5			—			6
Interest-bearing cash — intercompany	—			—			6			(6		)	—
Operating leases	1			—			2,585			—			2,586
Total financing revenue and other interest income	(28		)	—			6,344			(43		)	6,273
Interest expense
Interest on deposits	8			—			522			—			530
Interest on short-term borrowings	30			—			6			—			36
Interest on long-term debt	856			—			402			—			1,258
Interest on intercompany debt	28			—			15			(43		)	—
Total interest expense	922			—			945			(43		)	1,824
Depreciation expense on operating lease assets	1			—			1,712			—			1,713
Net financing (loss) revenue	(951		)	—			3,687			—			2,736
Cash dividends from subsidiaries
Bank subsidiaries	525			525			—			(1,050		)	—
Nonbank subsidiaries	980			—			—			(980		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			706			—			706
(Loss) gain on mortgage and automotive loans, net	(9		)	—			54			—			45
Loss on extinguishment of debt	(353		)	—			(1		)	—			(354		)
Other gain on investments, net	—			—			106			—			106
Other income, net of losses	1,045			—			1,019			(1,781		)	283
Total other revenue	683			—			1,884			(1,781		)	786
Total net revenue	1,237			525			5,571			(3,811		)	3,522
Provision for loan losses	111			—			356			—			467
Noninterest expense
Compensation and benefits expense	431			—			634			(339		)	726
Insurance losses and loss adjustment expenses	—			—			239			—			239
Other operating expenses	935			—			1,635			(1,442		)	1,128
Total noninterest expense	1,366			—			2,508			(1,781		)	2,093
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(240		)	525			2,707			(2,030		)	962
Income tax (benefit) expense from continuing operations	(231		)	—			572			—			341
Net (loss) income from continuing operations	(9		)	525			2,135			(2,030		)	621
Income from discontinued operations, net of tax	367			—			38			—			405
Undistributed income (loss) of subsidiaries
Bank subsidiary	302			302			—			(604		)	—
Nonbank subsidiaries	366			(1		)	—			(365		)	—
Net income	1,026			826			2,173			(2,999		)	1,026
Other comprehensive (loss) income, net of tax	(56		)	40			(64		)	24			(56		)
Comprehensive income	$	970		$	866		$	2,109		$	(2,975	)	$	970

Condensed Consolidating Balance Sheet

September 30, 2016($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	809		$	—	$	970		$	—		$	1,779
Interest-bearing	600			—		1,910			—			2,510
Interest-bearing — intercompany	—			—		779			(779		)	—
Total cash and cash equivalents	1,409			—		3,659			(779		)	4,289
Available-for-sale securities	—			—		18,030			(329		)	17,701
Held-to-maturity securities	—			—		649			—			649
Loans held-for-sale, net	—			—		56			—			56
Finance receivables and loans, net
Finance receivables and loans, net	5,501			—		109,458			—			114,959
Intercompany loans to
Bank subsidiary	300			—		—			(300		)	—
Nonbank subsidiaries	1,693			—		600			(2,293		)	—
Allowance for loan losses	(125		)	—		(1,009		)	—			(1,134		)
Total finance receivables and loans, net	7,369			—		109,049			(2,593		)	113,825
Investment in operating leases, net	50			—		12,639			—			12,689
Intercompany receivables from
Bank subsidiary	343			—		—			(343		)	—
Nonbank subsidiaries	90			—		127			(217		)	—
Investment in subsidiaries
Bank subsidiary	17,582			17,582		—			(35,164		)	—
Nonbank subsidiaries	11,378			1		—			(11,379		)	—
Premiums receivable and other insurance assets	—			—		1,906			(25		)	1,881
Other assets	4,434			—		4,681			(2,808		)	6,307
Total assets	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	101		$	—		$	101
Interest-bearing	193			—		75,450			—			75,643
Total deposit liabilities	193			—		75,551			—			75,744
Short-term borrowings	3,525			—		2,909			—			6,434
Long-term debt	22,264			—		34,572			—			56,836
Intercompany debt to
Bank subsidiary	330			—		—			(330		)	—
Nonbank subsidiaries	1,379			—		1,993			(3,372		)	—
Intercompany payables to
Bank subsidiary	436			—		—			(436		)	—
Nonbank subsidiaries	179			—		(29		)	(150		)	—
Interest payable	247			—		215			—			462
Unearned insurance premiums and service revenue	—			—		2,493			—			2,493
Accrued expenses and other liabilities	472			—		4,133			(2,807		)	1,798
Total liabilities	29,025			—		121,837			(7,095		)	143,767
Total equity	13,630			17,583		28,959			(46,542		)	13,630
Total liabilities and equity	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

December 31, 2015 ($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	1,234		$	—	$	914		$	—		$	2,148
Interest-bearing	401			—		3,831			—			4,232
Interest-bearing — intercompany	—			—		850			(850		)	—
Total cash and cash equivalents	1,635			—		5,595			(850		)	6,380
Available-for-sale securities	—			—		17,157			—			17,157
Loans held-for-sale, net	—			—		105			—			105
Finance receivables and loans, net
Finance receivables and loans, net	2,636			—		108,964			—			111,600
Intercompany loans to
Bank subsidiary	600			—		—			(600		)	—
Nonbank subsidiaries	3,277			—		559			(3,836		)	—
Allowance for loan losses	(72		)	—		(982		)	—			(1,054		)
Total finance receivables and loans, net	6,441			—		108,541			(4,436		)	110,546
Investment in operating leases, net	81			—		16,190			—			16,271
Intercompany receivables from
Bank subsidiary	186			—		—			(186		)	—
Nonbank subsidiaries	259			—		282			(541		)	—
Investment in subsidiaries
Bank subsidiary	16,496			16,496		—			(32,992		)	—
Nonbank subsidiaries	10,902			11		—			(10,913		)	—
Premiums receivable and other insurance assets	—			—		1,827			(26		)	1,801
Other assets	4,785			—		4,488			(2,952		)	6,321
Total assets	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	89		$	—		$	89
Interest-bearing	229			—		66,160			—			66,389
Total deposit liabilities	229			—		66,249			—			66,478
Short-term borrowings	3,453			—		4,648			—			8,101
Long-term debt	21,048			—		45,186			—			66,234
Intercompany debt to
Nonbank subsidiaries	1,409			—		3,877			(5,286		)	—
Intercompany payables to
Bank subsidiary	142			—		—			(142		)	—
Nonbank subsidiaries	420			—		191			(611		)	—
Interest payable	258			—		92			—			350
Unearned insurance premiums and service revenue	—			—		2,434			—			2,434
Accrued expenses and other liabilities	387			82		4,028			(2,952		)	1,545
Total liabilities	27,346			82		126,705			(8,991		)	145,142
Total equity	13,439			16,425		27,480			(43,905		)	13,439
Total liabilities and equity	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

Condensed Consolidating Statement of Cash Flows

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	709		$	—		$	3,782		$	(902	)	$	3,589
Investing activities
Purchases of available-for-sale securities	—			—			(11,027		)	—			(11,027		)
Proceeds from sales of available-for-sale securities	—			—			8,546			—			8,546
Proceeds from maturities and repayments of available-for-sale securities	—			—			2,411			—			2,411
Purchases of held-to-maturity securities	—			—			(650		)	—			(650		)
Net decrease (increase) in finance receivables and loans	934			—			(9,242		)	—			(8,308		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			4,221			—			4,221
Net change in loans — intercompany	1,788			—			(41		)	(1,747		)	—
Purchases of operating lease assets	—			—			(2,360		)	—			(2,360		)
Disposals of operating lease assets	16			—			4,615			—			4,631
Acquisitions, net of cash acquired	(309		)	—			—			—			(309		)
Capital contributions to subsidiaries	(3,112		)	—			—			3,112			—
Returns of contributed capital	2,168			8			—			(2,176		)	—
Net change in restricted cash	(136		)	—			758			—			622
Net change in nonmarketable equity investments	—			—			(401		)	—			(401		)
Other, net	(156		)	—			(103		)	102			(157		)
Net cash provided by (used in) investing activities	1,193			8			(3,273		)	(709		)	(2,781		)
Financing activities
Net change in short-term borrowings — third party	72			—			(1,745		)	—			(1,673		)
Net (decrease) increase in deposits	(36		)	—			9,276			—			9,240
Proceeds from issuance of long-term debt — third party	1,084			—			10,145			—			11,229
Repayments of long-term debt — third party	(2,279		)	—			(18,479		)	—			(20,758		)
Net change in debt — intercompany	(30		)	—			(1,788		)	1,818			—
Redemption of preferred stock	(696		)	—			—			—			(696		)
Repurchase of common stock	(173		)	—			—			—			(173		)
Dividends paid — third party	(70		)	—			—			—			(70		)
Dividends paid and returns of contributed capital — intercompany	—			(8		)	(2,968		)	2,976			—
Capital contributions from parent	—			—			3,112			(3,112		)	—
Net cash used in financing activities	(2,128		)	(8		)	(2,447		)	1,682			(2,901		)
Effect of exchange-rate changes on cash and cash equivalents	—			—			2			—			2
Net decrease in cash and cash equivalents	(226		)	—			(1,936		)	71			(2,091		)
Cash and cash equivalents at beginning of year	1,635			—			5,595			(850		)	6,380
Cash and cash equivalents at September 30,	$	1,409		$	—		$	3,659		$	(779	)	$	4,289

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	67		$	525		$	5,408		$	(2,030	)	$	3,970
Investing activities
Purchases of available-for-sale securities	—			—			(10,011		)	—			(10,011		)
Proceeds from sales of available-for-sale securities	—			—			4,408			—			4,408
Proceeds from maturities and repayments of available-for -sale securities	—			—			3,141			—			3,141
Net decrease (increase) in finance receivables and loans	398			—			(9,573		)	—			(9,175		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			2,665			—			2,665
Net change in loans — intercompany	2,392			—			1,225			(3,617		)	—
Purchases of operating lease assets	(94		)	—			(3,329		)	—			(3,423		)
Disposals of operating lease assets	—			—			3,855			—			3,855
Capital contributions to subsidiaries	(228		)	(1		)	1			228			—
Returns of contributed capital	881			—			—			(881		)	—
Proceeds from sale of business unit, net	1,049			—			—			—			1,049
Net change in restricted cash	(12		)	—			501			—			489
Net change in nonmarketable equity investments	—			—			(42		)	—			(42		)
Other, net	(29		)	—			54			—			25
Net cash provided by (used in) investing activities	4,357			(1		)	(7,105		)	(4,270		)	(7,019		)
Financing activities
Net change in short-term borrowings — third party	120			—			(1,812		)	—			(1,692		)
Net (decrease) increase in deposits	(72		)	—			5,869			—			5,797
Proceeds from issuance of long-term debt — third party	4,037			—			19,829			—			23,866
Repayments of long-term debt — third party	(5,866		)	—			(17,588		)	—			(23,454		)
Net change in debt — intercompany	(1,117		)	—			(2,393		)	3,510			—
Repurchase and redemption of preferred stock	(442		)	—			—			—			(442		)
Repurchase of common stock	(16		)	—			—			—			(16		)
Dividends paid — third party	(1,356		)	—			—			—			(1,356		)
Dividends paid and returns of contributed capital — intercompany	—			(525		)	(2,386		)	2,911			—
Capital contributions from parent	—			1			227			(228		)	—
Net cash (used in) provided by financing activities	(4,712		)	(524		)	1,746			6,193			2,703
Effect of exchange-rate changes on cash and cash equivalents	—			—			(3		)	—			(3		)
Net (decrease) increase in cash and cash equivalents	(288		)	—			46			(107		)	(349		)
Cash and cash equivalents at beginning of year	2,286			—			3,905			(615		)	5,576
Cash and cash equivalents at September 30,	$	1,998		$	—		$	3,951		$	(722	)	$	5,227

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Contingencies and Other Risks

9 Months Ended

Sep. 30, 2016

Loss Contingency [Abstract]

Contingencies Disclosure and Other Risks [Text Block]

Contingencies and Other Risks

Legal Matters

Ally and its subsidiaries, including Ally Bank, are or may be subject to potential liability in connection with pending or threatened legal proceedings and other matters. These legal matters may be formal or informal and include litigation and arbitration with one or more identified claimants, certified or purported class actions with yet-to-be-identified claimants, and regulatory or other governmental information-gathering requests, examinations, investigations, and enforcement proceedings. Our legal matters exist in varying stages of adjudication, arbitration, negotiation, or investigation and span our lines of business and operations. Claims may be based in law or equity—such as those arising under contracts or in tort and those involving banking, consumer-protection, securities, tax, employment, and other laws—and some can present novel legal theories and allege substantial or indeterminate damages.

We accrue for a legal matter when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment after consultation with counsel. No assurance exists that our accruals will not need to be adjusted in the future.

The course and outcome of legal matters are inherently unpredictable. This is especially so when a matter is still in its early stages, the damages sought are indeterminate or unsupported, significant facts are unclear or disputed, novel questions of law or other meaningful legal uncertainties exist, a request to certify a proceeding as a class action is outstanding or granted, multiple parties are named, or regulatory or other governmental entities are involved. As a result, we cannot state with confidence how or when threatened or pending legal matters will be resolved and what losses may be incurred. Actual losses may be higher or lower than any amounts accrued for those matters, possibly to a significant degree.

On the basis of information currently available, advice of counsel, available insurance coverage, and established reserves, it is the opinion of management that, except as described in the next paragraph, the eventual outcome of our existing legal matters will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows. It is possible, however, that an unfavorable resolution of legal matters may be material to our consolidated financial condition, results of operations, or cash flows in a particular period.

Descriptions of our material legal matters follow. In each case, the matter could have material adverse consequences for us, including substantial damages or settlements, injunctions, governmental fines or penalties, and reputational or operational risks. We do not believe, however, that an estimate of reasonably possible losses or a range of reasonably possible losses in excess of established reserves—whether in excess of any related accrual or where no accrual exists—can be made for any of these matters, except as described within Indirect Automotive Finance Matters.

Mortgage Matters

We have received subpoenas from the U.S. Department of Justice (DOJ) that include a broad request for documentation and other information relating to residential mortgage-backed securities issued by our former mortgage subsidiary, Residential Capital, LLC and its subsidiaries (ResCap RMBS). In connection with these requests, the DOJ is investigating potential fraud and other potential legal claims related to ResCap RMBS, including its investigation of potential claims under the Financial Institutions Reform, Recovery, and Enforcement Act of 1989. The DOJ is also investigating potential claims under the False Claims Act (FCA) related to representations made by us in connection with investments in Ally made by the U.S. Department of the Treasury pursuant to the Troubled Asset Relief Program in 2008 and 2009 regarding certain claims against Residential Capital, LLC or its subsidiaries at that time.

We have actively cooperated with the DOJ in connection with its investigations and potential claims. At the request of the DOJ, we entered into an agreement to voluntarily extend the statutes of limitations related to potential FCA claims, but this agreement expired at the end of January 2016. We are currently in advanced settlement discussions to resolve the DOJ’s investigations and potential claims.

During the three months ended September 30, 2016, we established a reserve of $52 million within discontinued operations in connection with potential claims related to our discontinued mortgage business.

Securities Litigation

In October 2016, a purported class action—Bucks County Employees Retirement Fund v. Ally Financial Inc. et al, Case No. 16-013616-CZ—was filed in the Circuit Court for Wayne County in the State of Michigan. The complaint alleges material misstatements and omissions in connection with Ally’s initial public offering in April 2014, including a failure to adequately disclose the severity of rising subprime automotive loan delinquency rates, deficient underwriting measures employed in the origination of subprime automotive loans, and aggressive tactics used with low-income borrowers. The request for relief includes an indeterminate amount of damages, fees, and costs and other remedies. We intend to vigorously defend against this action.

Automotive Subprime Matters

In October 2014, we received a document request from the SEC in connection with its investigation related to subprime automotive finance and related securitization activities. Separately, in December 2014, we received a subpoena from the DOJ requesting similar information. In May 2015, we received an information request from the New York Department of Financial Services requesting similar information. We have cooperated with each of these agencies with respect to these matters.

Indirect Automotive Finance Matters

In December 2013, Ally Financial Inc. and Ally Bank entered into a Consent Order issued by the U.S. Consumer Financial Protection Bureau (CFPB) and a Consent Order jointly submitted with the DOJ and entered by the U.S. District Court for the Eastern District of Michigan (United States v. Ally Financial Inc. and Ally Bank, Civil Action No. 13-15180), in each case, pertaining to allegations of discrimination involving the automotive finance business. The Consent Orders require Ally to create a compliance plan addressing, at a minimum, the communication of Ally’s expectations of Equal Credit Opportunity Act (ECOA) compliance to our automotive dealer clients, maintenance of Ally’s existing limits on dealer finance income for contracts acquired by Ally, and monitoring for potential discrimination both at the dealer level and within our portfolio of contracts acquired across all of our automotive dealer clients. Ally formed a compliance committee consisting of certain Ally and Ally Bank directors to oversee Ally’s execution of the Consent Orders’ terms. Ally is required to meet certain stipulations under the Consent Orders, including a requirement to make monetary payments when ongoing remediation targets are not attained.

Since 2013, Ally has expensed approximately $230 million for judgments, fines, and monetary remuneration payments to customers related to the Consent Orders. Ally expects to expense an additional $10 million to $15 million in the fourth quarter of 2016 for remaining monetary remuneration to customers related to the Consent Orders. The Consent Orders terminate, according to their terms, in 2017, and preclude the CFPB and the DOJ from pursuing any potential violations of the ECOA against Ally Financial Inc. or Ally Bank for conduct undertaken pursuant to the Consent Orders during the period of the Consent Orders. If the CFPB or the DOJ were to assert that Ally Financial Inc. or Ally Bank is violating the ECOA after the Consent Orders terminate, further legal proceedings could occur.

Other Contingencies

Ally and its subsidiaries, including Ally Bank, are or may be subject to potential liability under various other contingent exposures, including indemnification, tax, self-insurance, and other miscellaneous contingencies. We accrue for a contingent exposure when a loss becomes probable and the amount of loss can be reasonably estimated. Accruals are evaluated each quarter and may be adjusted, upward or downward, based on our best judgment. No assurance exists that our accruals will not need to be adjusted in the future, and actual losses may be higher or lower than any amounts accrued for those exposures, possibly to a significant degree. On the basis of information currently available, available insurance coverage, and established reserves, it is the opinion of management that the eventual outcome of our other contingent exposures will not have a material adverse effect on our consolidated financial condition, results of operations, or cash flows.

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Subsequent Events

9 Months Ended

Sep. 30, 2016

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

Declaration of Quarterly Dividend Payment

On October 18, 2016, the Ally Board of Directors declared a quarterly cash dividend payment of $0.08 per share on all common stock. The dividend is payable on November 15, 2016, to shareholders of record at the close of business on November 1, 2016.

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Description of Business, Basis of Presentation, and Changes in Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business Combinations Policy [Policy Text Block]

Business Combinations

We account for our business acquisitions using the acquisition method of accounting. Under this method we generally record the initial carrying values of purchased assets, including identifiable intangible assets, and assumed liabilities at fair value on the acquisition date. We recognize goodwill when the acquisition price is greater than the fair value of the net assets acquired, including identifiable intangible assets. The initial fair value of recognized assets and liabilities are subject to refinement during the measurement period, a period up to one year after the closing date of an acquisition, as information relative to closing date fair values becomes available. Costs directly related to business combinations are recorded as expenses as they are incurred.

Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]

Goodwill and Other Intangibles

Goodwill and intangible assets, net of accumulated amortization, are reported in other assets.

Our intangible assets primarily consist of acquired customer relationships and developed technology, and are amortized using a straight line methodology over their estimated useful lives. We review intangible assets for impairment at least annually, or whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. If it is determined the carrying amount of the asset is not recoverable, an impairment charge is recorded. Refer to Note 2 for further discussion on intangible assets.

Goodwill represents the excess of the cost of an acquisition over the fair value of net assets acquired, including identifiable intangibles. We allocate goodwill to applicable reporting units based on the relative fair value of other net assets allocated to those reporting units at the time of the acquisition. In the event we restructure our business, we may reallocate goodwill. We test goodwill for impairment annually, or more frequently if events and changes in circumstances indicate that it is more likely than not that impairment exists. Our annual goodwill impairment test is performed as of August 31 of each year. In certain situations, we may perform a qualitative assessment to test goodwill for impairment. We may also decide to bypass the qualitative assessment and perform a quantitative assessment. If we perform the qualitative assessment to test goodwill for impairment and conclude that it is more likely than not that the reporting unit’s fair value is greater than its carrying value, then the quantitative assessment is not required. However, if we perform the qualitative assessment and determine that is it more likely than not that a reporting unit’s fair value is less than its carrying value, then we must perform the quantitative assessment. The quantitative assessment uses a two-step process. The first step of the assessment requires us to compare the fair value of each of the reporting units to their respective carrying value. The fair value of the reporting units in our quantitative assessment is determined based on various analyses including discounted cash flow projections using assumptions a market participant would use. If the carrying value is less than the fair value, no impairment exists, and the second step does not need to be completed. If the carrying value is higher than the fair value or there is an indication that impairment may exist, a second step must be performed where we determine the implied value of goodwill based on the individual fair values of the reporting unit's assets and liabilities, including unrecognized intangibles, to compute the amount of the impairment. Refer to Note 2 for further discussion on goodwill.

Income Tax, Policy [Policy Text Block]

Income Taxes

In calculating the provision for interim income taxes, in accordance with Accounting Standards Codification (ASC) 740, Income Taxes, we apply an estimated annual effective tax rate to year-to-date ordinary income. At the end of each interim period, we estimate the effective tax rate expected to be applicable for the full fiscal year. This method differs from that described in Note 1 to the Annual Consolidated Financial Statements, which describes our annual significant income tax accounting policy and related methodology.

Investment, Policy [Policy Text Block]

Investments

Our portfolio of investments includes various debt and marketable equity securities and nonmarketable equity investments. Debt and marketable equity securities are classified based on management’s intent to sell or hold the security. We classify debt securities as held-to-maturity only when we have both the intent and ability to hold the securities to maturity. We classify debt and marketable equity securities as trading when the securities are acquired for the purpose of selling or holding them for a short period of time. Securities not classified as either held-to-maturity or trading are classified as available-for-sale.

Our debt and marketable equity securities include government securities, corporate bonds, asset-backed securities (ABS), mortgage-backed securities (MBS), equity securities and other investments. Our portfolio includes securities classified as available-for-sale and held-to-maturity. Our available-for-sale securities are carried at fair value with unrealized gains and losses included in accumulated other comprehensive income or loss and are subject to impairment. Our held-to-maturity securities are carried at amortized cost and are subject to impairment.

We amortize premiums and discounts on debt securities as an adjustment to investment yield generally over the stated maturity of the security. For ABS and MBS where prepayments can be reasonably estimated, amortization is adjusted for expected prepayments.

Additionally, we assess our debt and marketable equity securities for potential other-than-temporary impairment. We employ a methodology that considers available evidence in evaluating potential other-than-temporary impairment of our debt and marketable equity securities classified as available-for-sale and held-to-maturity. If the cost of an investment exceeds its fair value, we evaluate, among other factors, the magnitude and duration of the decline in fair value. We also evaluate the financial health of and business outlook for the issuer, the performance of the underlying assets for interests in securitized assets, and, for securities classified as available-for-sale, our intent and ability to hold the investment through recovery of its amortized cost basis.

Once a decline in fair value of a debt security is determined to be other-than-temporary, an impairment charge for the credit component is recorded to other gain (loss) on investments, net, in our Consolidated Statement of Income, and a new cost basis in the investment is established. The noncredit loss component of a debt security is recorded in other comprehensive income (loss) when we do not intend to sell the security and it is not more likely than not that we will have to sell the security prior to the security's anticipated recovery. The credit and noncredit loss components are recorded in earnings when we intend to sell the security or it is more likely than not that we will have to sell the security prior to the security’s anticipated recovery. Unrealized losses that we have determined to be other-than-temporary on equity securities are recorded to other gain (loss) on investments, net in our Consolidated Statement of Income. Subsequent increases and decreases to the fair value of available-for-sale debt and equity securities are included in other comprehensive income (loss), so long as they are not attributable to another other-than-temporary impairment.

Realized gains and losses on investment securities are reported in other gain (loss) on investments, net, and are determined using the specific identification method. For information on our debt and marketable equity securities, refer to Note 6.

In addition to our investments in debt and marketable equity securities, we hold equity positions in other entities. These positions include Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock held to meet regulatory requirements, other equity investments that are not publicly traded and do not have a readily determinable fair value, equity investments in low income housing tax credits, and Community Reinvestment Act (CRA) equity investments. Our investments in FHLB and FRB stock and other equity investments are accounted for using the cost method of accounting. Our low income housing tax credit investments are accounted for using the proportionate amortization method of accounting for qualified affordable housing investments. Our CRA investments are accounted for using the equity method of accounting. Our FHLB and FRB stock and other equity investments carried at cost are included in nonmarketable equity investments in other assets. Our investments in low income housing tax credits and CRA are also included in other assets. As conditions warrant, we review our investments carried at cost for impairment and will adjust the carrying value of the investment if it is deemed to be impaired. No impairment was recognized in 2016 or 2015. For more information on our nonmarketable equity investments, refer to Note 22.

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Discontinued Operations Discontinued Operations (Policies)

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

Discontinued Operations, Policy [Policy Text Block]

Prior to the adoption of ASU 2014-08, which was prospectively applied only to newly identified disposals that qualify as discontinued operations beginning after January 1, 2015, we have classified operations as discontinued when operations and cash flows will be eliminated from our ongoing operations and we do not expect to retain any significant continuing involvement in their operations after the respective sale or disposal transactions. For all periods presented, the operating results for these discontinued operations have been removed from continuing operations and presented separately as discontinued operations, net of tax, in the Condensed Consolidated Statement of Comprehensive Income. The Notes to the Condensed Consolidated Financial Statements have been adjusted to exclude discontinued operations unless otherwise noted.

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Acquisition of TradeKing Acquisition of TradeKing (Tables)

9 Months Ended

Sep. 30, 2016

Business Acquisition [Line Items]

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The following table summarizes the allocation of cash consideration paid for TradeKing and the amounts of the identifiable assets acquired and liabilities assumed recognized at the acquisition date.

($ in millions)
Purchase price
Cash consideration	$	298
Allocation of purchase price to net assets acquired
Intangible assets (a)	82
Cash and short-term investments (b)	50
Other assets	14
Deferred tax asset, net	4
Employee compensation and benefits	(41		)
Other liabilities	(4		)
Goodwill	$	193

(a) We recorded $3 million of amortization on these intangible assets during both the three and nine months ended September 30, 2016.

(b) Includes $40 million in cash proceeds from the acquisition transaction in order to pay employee compensation and benefits that vested upon acquisition as a result of the change in control.

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2016

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

Select financial information of discontinued operations is summarized below. The pretax income or loss includes direct costs to transact a sale.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Select Automotive Finance operations
Pretax (loss) income (a)	$	(5	)	$	(1	)	$	(5	)	$	452
Tax expense (b)	2			3			2			68
Other operations
Pretax (loss) income	$	(41	)	$	(1	)	$	(39	)	$	19
Tax expense (benefit)	4			—			—			(2		)

(a) Includes certain treasury and other corporate activity recognized by Corporate and Other.

(b) Includes certain income tax activity recognized by Corporate and Other.

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Other Income, Net of Losses (Tables)

9 Months Ended

Sep. 30, 2016

Other Nonoperating Income (Expense) [Abstract]

Schedule of Other Nonoperating Income, by Component [Table Text Block]

Details of other income, net of losses, were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Remarketing fees	$	26	$	25	$	79	$	78
Late charges and other administrative fees	25		23		72		66
Servicing fees	18		12		49		32
Income from equity-method investments	3		11		14		48
Other, net	26		21		75		59
Total other income, net of losses	$	98	$	92	$	289	$	283

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Other Operating Expenses (Tables)

9 Months Ended

Sep. 30, 2016

Operating Expenses [Abstract]

Schedule of Other Operating Cost and Expense, by Component [Table Text Block]

Details of other operating expenses were as follows.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Insurance commissions	$	99	$	95	$	290	$	283
Technology and communications	70		65		203		198
Lease and loan administration	34		31		100		92
Advertising and marketing	27		26		75		80
Professional services	25		23		75		68
Vehicle remarketing and repossession	24		20		70		56
Regulatory and licensing fees	26		18		68		59
Premises and equipment depreciation	19		20		61		62
Occupancy	13		13		38		38
Non-income taxes	10		11		27		26
Other	71		56		182		166
Total other operating expenses	$	418	$	378	$	1,189	$	1,128

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Investment [Table Text Block]

Our portfolio of securities includes bonds, equity securities, asset- and mortgage-backed securities, and other investments. The cost, fair value, and gross unrealized gains and losses on investment securities were as follows.

	September 30, 2016									December 31, 2015
	Amortized cost		Gross unrealized					Fair value		Amortized cost		Gross unrealized					Fair value
($ in millions)			gains		losses							gains		losses
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	316	$	5	$	—		$	321	$	1,760	$	—	$	(19	)	$	1,741
U.S. States and political subdivisions	740		26		(3		)	763		693		24		(1		)	716
Foreign government	170		10		—			180		169		8		—			177
Mortgage-backed residential (a)	11,992		180		(29		)	12,143		10,459		52		(145		)	10,366
Mortgage-backed commercial	526		1		(3		)	524		486		—		(5		)	481
Asset-backed	1,563		8		(1		)	1,570		1,762		1		(8		)	1,755
Corporate debt	1,597		36		(3		)	1,630		1,213		8		(17		)	1,204
Total debt securities (b) (c)	16,904		266		(39		)	17,131		16,542		93		(195		)	16,440
Equity securities	631		2		(63		)	570		808		3		(94		)	717
Total available-for-sale securities	$	17,535	$	268	$	(102	)	$	17,701	$	17,350	$	96	$	(289	)	$	17,157
Total held-to-maturity securities (d)	$	649	$	10	$	(1	)	$	658	$	—	$	—	$	—		$	—

(a) Residential mortgage-backed securities include agency-backed bonds totaling $9,772 million and $7,544 million at September 30, 2016, and December 31, 2015, respectively.

(b) Certain entities related to our Insurance operations are required to deposit securities with state regulatory authorities. These deposited securities totaled $15 million and $14 million at September 30, 2016, and December 31, 2015.

(c) Investment securities with a fair value of $635 million and $2,506 million at September 30, 2016, and December 31, 2015, were pledged to secure advances from the FHLB, short-term borrowings or repurchase agreements and for other purposes as required by contractual obligation or law. Under these agreements, Ally has granted the counterparty the right to sell or pledge $635 million and $745 million of the underlying investment securities at September 30, 2016, and December 31, 2015, respectively.

(d) Held-to-maturity securities are recorded at amortized cost and consist of agency-backed residential mortgage-backed debt securities for liquidity purposes.

Investments Classified by Contractual Maturity Date [Table Text Block]

The maturity distribution of investment securities outstanding is summarized in the following tables. Call or prepayment options may cause actual maturities to differ from contractual maturities.

	Total				Due in one year or less				Due after one year through five years				Due after five years through ten years				Due after ten years
($ in millions)	Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield		Amount		Yield
September 30, 2016
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	321	1.7	%	$	2	4.3	%	$	10	1.7	%	$	309	1.7	%	$	—	—	%
U.S. States and political subdivisions	763		3.1		115		2.4		24		2.4		143		3.0		481		3.4
Foreign government	180		2.6		—		—		73		2.9		107		2.5		—		—
Mortgage-backed residential	12,143		2.9		—		—		—		—		34		2.5		12,109		2.9
Mortgage-backed commercial	524		2.4		—		—		—		—		3		2.8		521		2.4
Asset-backed	1,570		2.7		—		—		1,059		2.6		300		3.3		211		2.5
Corporate debt	1,630		2.9		50		2.3		949		2.6		591		3.2		40		4.7
Total available-for-sale debt securities	$	17,131	2.9		$	167	2.4		$	2,115	2.6		$	1,487	2.8		$	13,362	2.9
Amortized cost of available-for-sale debt securities	$	16,904			$	168			$	2,093			$	1,449			$	13,194
Amortized cost of held-to-maturity securities	$	649	2.9	%	$	—	—	%	$	—	—	%	$	—	—	%	$	649	2.9	%
December 31, 2015
Fair value of available-for-sale debt securities (a)
U.S. Treasury and federal agencies	$	1,741	1.8	%	$	6	5.1	%	$	510	1.2	%	$	1,225	2.1	%	$	—	—	%
U.S. States and political subdivisions	716		3.2		86		1.3		37		2.2		141		2.8		452		3.7
Foreign government	177		2.6		9		1.9		77		2.8		91		2.6		—		—
Mortgage-backed residential	10,366		2.9		—		—		33		2.1		36		2.5		10,297		2.9
Mortgage-backed commercial	481		2.0		—		—		—		—		3		2.7		478		2.0
Asset-backed	1,755		2.3		6		1.4		1,027		2.1		518		2.6		204		2.2
Corporate debt	1,204		2.9		50		3.0		713		2.5		410		3.4		31		5.4
Total available-for-sale debt securities	$	16,440	2.7		$	157	2.0		$	2,397	2.1		$	2,424	2.5		$	11,462	2.9
Amortized cost of available-for-sale debt securities	$	16,542			$	156			$	2,404			$	2,436			$	11,546

(a) Yield is calculated using the effective yield of each security at the end of the period, weighted based on the market value. The effective yield considers the contractual coupon and amortized cost, and excludes expected capital gains and losses.

Investment Income [Table Text Block]

The following table presents interest and dividends on investment securities.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Taxable interest	$	93	$	90	$	276	$	252
Taxable dividends	4		7		13		18
Interest and dividends exempt from U.S. federal income tax	4		5		13		13
Interest and dividends on investment securities	$	101	$	102	$	302	$	283

Schedule of Realized Gain (Loss) [Table Text Block]

The following table presents gross gains and losses realized upon the sales of available-for-sale securities and other-than-temporary impairment.

	Three months ended September 30,					Nine months ended September 30,
($ in millions)	2016		2015			2016			2015
Gross realized gains	$	52	$	28		$	146		$	134
Gross realized losses (a)	—		(11		)	(1		)	(14		)
Other-than-temporary impairment	—		(11		)	—			(14		)
Other gain on investments, net	$	52	$	6		$	145		$	106

(a) Certain available-for-sale securities were sold at a loss in 2016 and 2015 as a result of changing conditions within these respective periods (e.g., a downgrade in the rating of a debt security). Any such sales were made in accordance with our risk management policies and practices.

Schedule of Unrealized Loss on Investments [Table Text Block]

The table below summarizes available-for-sale securities in an unrealized loss position in accumulated other comprehensive income. Based on the assessment of whether such losses were deemed to be other-than-temporary, we believe that the unrealized losses are not indicative of an other-than-temporary impairment of these securities. As of September 30, 2016, we did not have the intent to sell the debt securities with an unrealized loss position in accumulated other comprehensive income, it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis, and we expect to recover the entire amortized cost basis of the securities. As of September 30, 2016, we had the ability and intent to hold equity securities with an unrealized loss position in accumulated other comprehensive income, and it is not more likely than not that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss position in accumulated other comprehensive income are not considered to be other-than-temporarily impaired at September 30, 2016. Refer to Note 1 for additional information related to investment securities and our methodology for evaluating potential other-than-temporary impairments.

	September 30, 2016										December 31, 2015
	Less than 12 months					12 months or longer					Less than 12 months					12 months or longer
($ in millions)	Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss			Fair value		Unrealized loss
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	—	$	—		$	—	$	—		$	1,553	$	(17	)	$	173	$	(2	)
U.S. States and political subdivisions	254		(2		)	11		(1		)	179		(1		)	—		—
Foreign government	—		—			—		—			2		—			—		—
Mortgage-backed	948		(4		)	1,786		(28		)	4,096		(43		)	2,453		(107		)
Asset-backed	406		(1		)	140		—			1,402		(8		)	64		—
Corporate debt	134		(1		)	50		(2		)	745		(16		)	12		(1		)
Total temporarily impaired debt securities	1,742		(8		)	1,987		(31		)	7,977		(85		)	2,702		(110		)
Temporarily impaired equity securities	148		(12		)	329		(51		)	534		(54		)	96		(40		)
Total temporarily impaired available-for-sale securities	$	1,890	$	(20	)	$	2,316	$	(82	)	$	8,511	$	(139	)	$	2,798	$	(150	)

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Finance Receivables and Loans, Net (Tables)

9 Months Ended

Sep. 30, 2016

Loans and Leases Receivable, Net Amount [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The composition of finance receivables and loans reported at gross carrying value was as follows.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive (a)	$	64,816	$	64,292
Consumer mortgage
Mortgage Finance (b)	7,931		6,413
Mortgage — Legacy (c)	2,926		3,360
Total consumer mortgage	10,857		9,773
Total consumer	75,673		74,065
Commercial
Commercial and industrial
Automotive	32,260		31,469
Other	3,250		2,640
Commercial real estate — Automotive	3,776		3,426
Total commercial	39,286		37,535
Total finance receivables and loans (d)	$	114,959	$	111,600

(a) Includes $66 million of fair value adjustment for loans in hedge accounting relationships at both September 30, 2016, and December 31, 2015. Refer to Note 20 for additional information.

(b) Includes loans originated as interest-only mortgage loans of $32 million and $44 million at September 30, 2016, and December 31, 2015, respectively, none of which are expected to start principal amortization in 2016, 3% in 2017, none in 2018, 39% in 2019, and 39% thereafter.

(c) Includes loans originated as interest-only mortgage loans of $771 million and $941 million at September 30, 2016, and December 31, 2015, respectively, 8% of which are expected to start principal amortization in 2016, 23% in 2017, 2% in 2018, none in 2019, and 1% thereafter.

(d) Totals include a net increase of $310 million and $110 million at September 30, 2016, and December 31, 2015, respectively, for unearned income, unamortized premiums and discounts, and deferred fees and costs.

Allowance for Credit Losses on Financing Receivables [Table Text Block]

The following tables present an analysis of the activity in the allowance for loan losses on finance receivables and loans.

Three months ended September 30, 2016 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial		Total
Allowance at July 1, 2016	$	862		$	109		$	118	$	1,089
Charge-offs	(293		)	(10		)	—		(303		)
Recoveries	74			16			—		90
Net charge-offs	(219		)	6			—		(213		)
Provision for loan losses	269			(15		)	4		258
Allowance at September 30, 2016	$	912		$	100		$	122	$	1,134

Three months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at July 1, 2015	$	767		$	119		$	88		$	974
Charge-offs	(220		)	(10		)	(1		)	(231		)
Recoveries	64			4			2			70
Net charge-offs	(156		)	(6		)	1			(161		)
Provision for loan losses	200			6			5			211
Other (a)	(7		)	—			1			(6		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018

(a)    Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Nine months ended September 30, 2016($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2016	$	834		$	114		$	106		$	1,054
Charge-offs	(773		)	(29		)	(1		)	(803		)
Recoveries	233			25			1			259
Net charge-offs	(540		)	(4		)	—			(544		)
Provision for loan losses	644			(10		)	16			650
Other (a)	(26		)	—			—			(26		)
Allowance at September 30, 2016	$	912		$	100		$	122		$	1,134
Allowance for loan losses at September 30, 2016
Individually evaluated for impairment	$	24		$	35		$	25		$	84
Collectively evaluated for impairment	888			65			97			1,050
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	64,816		$	10,857		$	39,286		$	114,959
Individually evaluated for impairment	349			251			111			711
Collectively evaluated for impairment	64,467			10,606			39,175			114,248
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Nine months ended September 30, 2015 ($ in millions)	Consumer automotive			Consumer mortgage			Commercial			Total
Allowance at January 1, 2015	$	685		$	152		$	140		$	977
Charge-offs	(579		)	(41		)	(1		)	(621		)
Recoveries	195			12			3			210
Net charge-offs	(384		)	(29		)	2			(411		)
Provision for loan losses	510			4			(47		)	467
Other (a)	(7		)	(8		)	—			(15		)
Allowance at September 30, 2015	$	804		$	119		$	95		$	1,018
Allowance for loan losses at September 30, 2015
Individually evaluated for impairment	$	22		$	48		$	19		$	89
Collectively evaluated for impairment	782			71			76			929
Loans acquired with deteriorated credit quality	—			—			—			—
Finance receivables and loans at gross carrying value
Ending balance	$	63,610		$	9,769		$	34,611		$	107,990
Individually evaluated for impairment	285			268			75			628
Collectively evaluated for impairment	63,325			9,501			34,536			107,362
Loans acquired with deteriorated credit quality	—			—			—			—

(a) Primarily related to the transfer of finance receivables and loans from held-for-investment to held-for-sale.

Schedule Of Sales Of Financing Receivables And Loans [Table Text Block]

The following table presents the gross carrying value of significant sales of finance receivables and loans and transfers of finance receivables and loans from held-for-investment to held-for-sale.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	57	$	704	$	4,216	$	704
Consumer mortgage	6		2		12		75
Commercial	—		1		28		1
Total sales and transfers	$	63	$	707	$	4,256	$	780

Schedule of Purchases of Financing Receivables and Loans [Table Text Block]

The following table presents information about significant purchases of finance receivables and loans.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016		2015
Consumer automotive	$	—	$	272	$	—	$	272
Consumer mortgage	467		990		2,855		3,640
Total purchases of finance receivables and loans	$	467	$	1,262	$	2,855	$	3,912

Past Due Financing Receivables [Table Text Block]

The following table presents an analysis of our past due finance receivables and loans recorded at gross carrying value.

($ in millions)	30-59 days past due		60-89 days past due		90 days or more past due		Total past due		Current		Total finance receivables and loans
September 30, 2016
Consumer automotive	$	1,584	$	343	$	260	$	2,187	$	62,629	$	64,816
Consumer mortgage
Mortgage Finance	64		4		4		72		7,859		7,931
Mortgage — Legacy	49		12		60		121		2,805		2,926
Total consumer mortgage	113		16		64		193		10,664		10,857
Total consumer	1,697		359		324		2,380		73,293		75,673
Commercial
Commercial and industrial
Automotive	—		—		—		—		32,260		32,260
Other	—		—		—		—		3,250		3,250
Commercial real estate — Automotive	—		—		—		—		3,776		3,776
Total commercial	—		—		—		—		39,286		39,286
Total consumer and commercial	$	1,697	$	359	$	324	$	2,380	$	112,579	$	114,959
December 31, 2015
Consumer automotive	$	1,618	$	369	$	222	$	2,209	$	62,083	$	64,292
Consumer mortgage
Mortgage Finance	44		5		10		59		6,354		6,413
Mortgage — Legacy	53		20		73		146		3,214		3,360
Total consumer mortgage	97		25		83		205		9,568		9,773
Total consumer	1,715		394		305		2,414		71,651		74,065
Commercial
Commercial and industrial
Automotive	—		—		—		—		31,469		31,469
Other	—		—		—		—		2,640		2,640
Commercial real estate — Automotive	—		—		—		—		3,426		3,426
Total commercial	—		—		—		—		37,535		37,535
Total consumer and commercial	$	1,715	$	394	$	305	$	2,414	$	109,186	$	111,600

Schedule of Financing Receivables, Non Accrual Status [Table Text Block]

The following table presents the gross carrying value of our finance receivables and loans on nonaccrual status.

($ in millions)	September 30, 2016		December 31, 2015
Consumer automotive	$	542	$	475
Consumer mortgage
Mortgage Finance	9		15
Mortgage — Legacy	91		113
Total consumer mortgage	100		128
Total consumer	642		603
Commercial
Commercial and industrial
Automotive	44		25
Other	62		44
Commercial real estate — Automotive	5		8
Total commercial	111		77
Total consumer and commercial finance receivables and loans	$	753	$	680

Financing Receivable Credit Quality Indicators - Performing and Nonperforming [Table Text Block]

The following table presents performing and nonperforming credit quality indicators in accordance with our internal accounting policies for our consumer finance receivables and loans recorded at gross carrying value. Nonperforming loans include finance receivables and loans on nonaccrual status when the principal or interest has been delinquent for 90 days or when full collection is not expected. Refer to Note 1 to the Annual Consolidated Financial Statements for additional information.

	September 30, 2016						December 31, 2015
($ in millions)	Performing		Nonperforming		Total		Performing		Nonperforming		Total
Consumer automotive	$	64,274	$	542	$	64,816	$	63,817	$	475	$	64,292
Consumer mortgage
Mortgage Finance	7,922		9		7,931		6,398		15		6,413
Mortgage — Legacy	2,835		91		2,926		3,247		113		3,360
Total consumer mortgage	10,757		100		10,857		9,645		128		9,773
Total consumer	$	75,031	$	642	$	75,673	$	73,462	$	603	$	74,065

Schedule Of Pass And Criticized Credit Quality Indicators Of Finance Receivables [Table Text Block]

The following table presents pass and criticized credit quality indicators based on regulatory definitions for our commercial finance receivables and loans recorded at gross carrying value.

	September 30, 2016						December 31, 2015
($ in millions)	Pass		Criticized (a)		Total		Pass		Criticized (a)		Total
Commercial and industrial
Automotive	$	30,355	$	1,905	$	32,260	$	29,613	$	1,856	$	31,469
Other	2,574		676		3,250		2,122		518		2,640
Commercial real estate — Automotive	3,600		176		3,776		3,265		161		3,426
Total commercial	$	36,529	$	2,757	$	39,286	$	35,000	$	2,535	$	37,535

(a) Includes loans classified as special mention, substandard, or doubtful. These classifications are based on regulatory definitions and generally represent loans within our portfolio that have a higher default risk or have already defaulted.

Impaired Financing Receivables [Table Text Block]

The following table presents information about our impaired finance receivables and loans.

($ in millions)	Unpaid principal balance (a)		Gross carrying value		Impaired with no allowance		Impaired with an allowance		Allowance for impaired loans
September 30, 2016
Consumer automotive	$	385	$	349	$	124	$	225	$	24
Consumer mortgage
Mortgage Finance	7		7		3		4		—
Mortgage — Legacy	248		244		56		188		35
Total consumer mortgage	255		251		59		192		35
Total consumer	640		600		183		417		59
Commercial
Commercial and industrial
Automotive	44		44		10		34		6
Other	76		62		—		62		18
Commercial real estate — Automotive	5		5		1		4		1
Total commercial	125		111		11		100		25
Total consumer and commercial finance receivables and loans	$	765	$	711	$	194	$	517	$	84
December 31, 2015
Consumer automotive	$	315	$	315	$	—	$	315	$	22
Consumer mortgage
Mortgage Finance	9		9		5		4		1
Mortgage — Legacy	260		257		59		198		43
Total consumer mortgage	269		266		64		202		44
Total consumer	584		581		64		517		66
Commercial
Commercial and industrial
Automotive	25		25		4		21		3
Other	44		44		—		44		15
Commercial real estate — Automotive	8		8		1		7		2
Total commercial	77		77		5		72		20
Total consumer and commercial finance receivables and loans	$	661	$	658	$	69	$	589	$	86

(a) Adjusted for charge-offs.

Schedule of Average Balance And Interest Income Of Impaired Finance Receivables [Table Text Block]

The following tables present average balance and interest income for our impaired finance receivables and loans.

	2016				2015
Three months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	347	$	4	$	288	$	4
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	245		2		261		3
Total consumer mortgage	253		2		268		3
Total consumer	600		6		556		7
Commercial
Commercial and industrial
Automotive	48		1		36		—
Other	63		—		45		—
Commercial real estate — Automotive	6		—		6		—
Total commercial	117		1		87		—
Total consumer and commercial finance receivables and loans	$	717	$	7	$	643	$	7

	2016				2015
Nine months ended September 30, ($ in millions)	Average balance		Interest income		Average balance		Interest income
Consumer automotive	$	340	$	12	$	291	$	13
Consumer mortgage
Mortgage Finance	8		—		7		—
Mortgage — Legacy	250		7		276		7
Total consumer mortgage	258		7		283		7
Total consumer	598		19		574		20
Commercial
Commercial and industrial
Automotive	35		1		35		1
Other	58		1		39		3
Commercial real estate — Automotive	6		—		5		—
Total commercial	99		2		79		4
Total consumer and commercial finance receivables and loans	$	697	$	21	$	653	$	24

Troubled Debt Restructurings on Financing Receivables [Table Text Block]

The following tables present information related to finance receivables and loans recorded at gross carrying value modified in connection with a TDR during the period.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	4,427	$	70	$	58	4,612	$	75	$	66
Consumer mortgage
Mortgage Finance	2	—		—		3	2		2
Mortgage — Legacy	35	6		6		50	11		11
Total consumer mortgage	37	6		6		53	13		13
Total consumer	4,464	76		64		4,665	88		79
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	4,464	$	76	$	64	4,667	$	112	$	103

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value		Number of loans	Pre-modification gross carrying value		Post-modification gross carrying value
Consumer automotive	14,816	$	238	$	202	12,763	$	202	$	173
Consumer mortgage
Mortgage Finance	5	2		2		5	3		3
Mortgage — Legacy	92	14		14		164	39		37
Total consumer mortgage	97	16		16		169	42		40
Total consumer	14,913	254		218		12,932	244		213
Commercial
Commercial and industrial
Automotive	—	—		—		—	—		—
Other	—	—		—		1	21		21
Commercial real estate — Automotive	—	—		—		1	3		3
Total commercial	—	—		—		2	24		24
Total consumer and commercial finance receivables and loans	14,913	$	254	$	218	12,934	$	268	$	237

Finance receivables and loans redefaulted during the period [Table Text Block]

The following tables present information about finance receivables and loans recorded at gross carrying value that have redefaulted during the reporting period and were within 12 months or less of being modified as a TDR. Redefault is when finance receivables and loans meet the requirements for evaluation under our charge-off policy (refer to Note 1 to the Annual Consolidated Financial Statements for additional information) except for commercial finance receivables and loans, where redefault is defined as 90 days past due.

	2016					2015
Three months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	1,959	$	23	$	14	1,742	$	21	$	12
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	1	—		—		2	1		—
Total consumer finance receivables and loans	1,960	$	23	$	14	1,744	$	22	$	12

	2016					2015
Nine months ended September 30, ($ in millions)	Number of loans	Gross carrying value		Charge-off amount		Number of loans	Gross carrying value		Charge-off amount
Consumer automotive	5,617	$	69	$	39	4,822	$	58	$	33
Consumer mortgage
Mortgage Finance	—	—		—		—	—		—
Mortgage — Legacy	4	—		—		9	1		—
Total consumer finance receivables and loans	5,621	$	69	$	39	4,831	$	59	$	33

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Investment in Operating Leases, Net (Tables)

9 Months Ended

Sep. 30, 2016

Leases, Operating [Abstract]

Schedule of Property Subject to or Available for Operating Lease [Table Text Block]

Investments in operating leases were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Vehicles	$	16,086		$	20,211
Accumulated depreciation	(3,397		)	(3,940		)
Investment in operating leases, net	$	12,689		$	16,271

Depreciation Expense On Operating Lease Assets [Table Text Block]

The following summarizes the components of depreciation expense on operating lease assets.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Depreciation expense on operating lease assets (excluding remarketing gains)	$	470		$	633		$	1,555		$	1,995
Remarketing gains	(62		)	(105		)	(203		)	(282		)
Net depreciation expense on operating lease assets	$	408		$	528		$	1,352		$	1,713

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Securitizations and Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2016

Securitizations And Variable Interest Entities [Abstract]

Variable Interest Entity Disclosure [Text Block]

Securitizations and Variable Interest Entities

We are involved in several types of securitization and financing transactions that utilize special-purpose entities (SPEs). A SPE is an entity that is designed to fulfill a specified limited need of the sponsor. Our principal use of SPEs is to obtain liquidity by securitizing certain of our financial assets and operating lease assets.

The transaction-specific SPEs involved in our securitization and other financing transactions are often considered VIEs. VIEs are entities that have either a total equity investment at risk that is insufficient to permit the entity to finance its activities without additional subordinated financial support or whose equity investors at risk lack the ability to control the entity's activities.

We provide a wide range of consumer and commercial automotive loans, operating leases, and commercial loans to a diverse customer base. We securitize consumer and commercial automotive loans, and operating leases through private-label securitizations. We often securitize these loans and notes secured by operating leases (collectively referred to as financial assets) through the use of securitization entities, which may or may not be consolidated on our Condensed Consolidated Balance Sheet.

We provide long-term guarantee contracts to investors in certain nonconsolidated affordable housing entities and have extended a line of credit to provide liquidity and minimize our exposure under these contracts. Since we do not have control over the entities or the power to make decisions, we do not consolidate the entities and our involvement is limited to the guarantee and the line of credit.

We have involvement with various other nonconsolidated equity investments, including affordable housing entities and venture capital funds and loan funds. We do not consolidate these entities and our involvement is limited to our outstanding investment, additional capital committed to these funds plus any previously recognized low income housing tax credits that are subject to recapture.

Refer to Note 10 to the Annual Consolidated Financial Statements for further description of our securitization activities and our involvement with VIEs.

Our involvement with consolidated and nonconsolidated VIEs in which we hold variable interests is presented below.

($ in millions)	Involvement with VIEs			Assets of nonconsolidated VIEs (a)			Maximum exposure to loss in nonconsolidated VIEs
September 30, 2016
On-balance sheet variable interest entities
Consumer automotive	$	23,608	(b)
Commercial automotive	15,746
Off-balance sheet variable interest entities
Consumer automotive	24			$	3,240	(c)	$	3,264	(d)
Commercial other	268		(e)	—		(c)	556		(f)
Total	$	39,646		$	3,240		$	3,820
December 31, 2015
On-balance sheet variable interest entities
Consumer automotive	$	27,967	(b)
Commercial automotive	16,763
Off-balance sheet variable interest entities
Consumer automotive	—			$	3,034		$	3,034	(d)
Commercial other	210		(e)	—		(c)	493		(f)
Total	$	44,940		$	3,034		$	3,527

(a) Asset values represent the current unpaid principal balance of outstanding consumer finance receivables and loans within the VIEs.

(b) Includes $10.0 billion and $10.6 billion of assets that are not encumbered by VIE beneficial interests held by third parties at September 30, 2016, and December 31, 2015, respectively. Ally or consolidated affiliates hold the interests in these assets which eliminate in consolidation.

(c) Includes VIEs for which we have no management oversight and therefore we are not able to provide the total assets of the VIEs.

(d) Maximum exposure to loss represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions and certain noncertificated interests retained from the sale of automotive finance receivables. This measure is based on the unlikely event that all of the loans have underwriting defects or other defects that trigger a representation and warranty provision and the collateral supporting the loans are worthless. This required disclosure is not an indication of our expected loss.

(e) Includes $276 million and $222 million classified as other assets, offset by $8 million and $12 million classified as accrued expenses and other liabilities at September 30, 2016, and December 31, 2015, respectively.

(f) For certain nonconsolidated affordable housing entities, maximum exposure to loss represents the yield we guaranteed investors through long term guarantee contracts. The amount disclosed is based on the unlikely event that the underlying properties cease generating yield to investors and the yield delivered to investors in the form of low income tax housing credits is recaptured. For nonconsolidated equity investments, maximum exposure to loss represents our outstanding investment, additional committed capital, and low income housing tax credits subject to recapture. The amount disclosed is based on the unlikely event that our committed capital is funded, our investments become worthless, and the tax credits previously delivered to us are recaptured. This required disclosure is not an indication of our expected loss.

Cash Flows with Off-balance Sheet Securitization Entities

The following table summarizes cash flows received and paid related to securitization entities and asset-backed financings where the transfer is accounted for as a sale and we have a continuing involvement with the transferred assets (e.g., servicing) that were outstanding during the nine months endedSeptember 30, 2016, and 2015. Additionally, this table contains information regarding cash flows received from and paid to nonconsolidated securitization entities that existed during each period.

Nine months ended September 30, ($ in millions)	Consumer automotive
2016
Cash proceeds from transfers completed during the period	$	1,659
Servicing fees	27
Other cash flows	6
2015
Cash proceeds from transfers completed during the period	$	1,044
Servicing fees	21

Delinquencies and Net Credit Losses

The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses.

	Total Amount				Amount 60 days or more past due
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
On-balance sheet loans
Consumer automotive	$	64,816	$	64,292	$	603	$	591
Consumer mortgage	10,857		9,773		80		108
Commercial automotive	36,036		34,895		—		—
Commercial other	3,306		2,745		—		—
Total on-balance sheet loans	115,015		111,705		683		699
Off-balance sheet securitization entities
Consumer automotive	2,734		2,529		11		9
Total off-balance sheet securitization entities	2,734		2,529		11		9
Whole-loan sales (a)	3,556		2,252		6		13
Total	$	121,305	$	116,486	$	700	$	721

(a) Whole-loan sales are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors.

	Net credit losses
	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016		2015
On-balance sheet loans
Consumer automotive	$	219		$	156		$	540	$	384
Consumer mortgage	(6		)	6			4		29
Commercial automotive	—			—			—		—
Commercial other	—			(1		)	—		(2		)
Total on-balance sheet loans	213			161			544		411
Off-balance sheet securitization entities
Consumer automotive	2			1			6		3
Total off-balance sheet securitization entities	2			1			6		3
Whole-loan sales	1			—			2		—
Total	$	216		$	162		$	552	$	414

Schedule of Variable Interest Entities [Table Text Block]

Our involvement with consolidated and nonconsolidated VIEs in which we hold variable interests is presented below.

($ in millions)	Involvement with VIEs			Assets of nonconsolidated VIEs (a)			Maximum exposure to loss in nonconsolidated VIEs
September 30, 2016
On-balance sheet variable interest entities
Consumer automotive	$	23,608	(b)
Commercial automotive	15,746
Off-balance sheet variable interest entities
Consumer automotive	24			$	3,240	(c)	$	3,264	(d)
Commercial other	268		(e)	—		(c)	556		(f)
Total	$	39,646		$	3,240		$	3,820
December 31, 2015
On-balance sheet variable interest entities
Consumer automotive	$	27,967	(b)
Commercial automotive	16,763
Off-balance sheet variable interest entities
Consumer automotive	—			$	3,034		$	3,034	(d)
Commercial other	210		(e)	—		(c)	493		(f)
Total	$	44,940		$	3,034		$	3,527

(a) Asset values represent the current unpaid principal balance of outstanding consumer finance receivables and loans within the VIEs.

(b) Includes $10.0 billion and $10.6 billion of assets that are not encumbered by VIE beneficial interests held by third parties at September 30, 2016, and December 31, 2015, respectively. Ally or consolidated affiliates hold the interests in these assets which eliminate in consolidation.

(c) Includes VIEs for which we have no management oversight and therefore we are not able to provide the total assets of the VIEs.

(d) Maximum exposure to loss represents the current unpaid principal balance of outstanding loans based on our customary representation and warranty provisions and certain noncertificated interests retained from the sale of automotive finance receivables. This measure is based on the unlikely event that all of the loans have underwriting defects or other defects that trigger a representation and warranty provision and the collateral supporting the loans are worthless. This required disclosure is not an indication of our expected loss.

(e) Includes $276 million and $222 million classified as other assets, offset by $8 million and $12 million classified as accrued expenses and other liabilities at September 30, 2016, and December 31, 2015, respectively.

(f) For certain nonconsolidated affordable housing entities, maximum exposure to loss represents the yield we guaranteed investors through long term guarantee contracts. The amount disclosed is based on the unlikely event that the underlying properties cease generating yield to investors and the yield delivered to investors in the form of low income tax housing credits is recaptured. For nonconsolidated equity investments, maximum exposure to loss represents our outstanding investment, additional committed capital, and low income housing tax credits subject to recapture. The amount disclosed is based on the unlikely event that our committed capital is funded, our investments become worthless, and the tax credits previously delivered to us are recaptured. This required disclosure is not an indication of our expected loss.

Schedule Of Cash Flow Received And Paid To Nonconsolidated Securitization Entities [Table Text Block]

The following table summarizes cash flows received and paid related to securitization entities and asset-backed financings where the transfer is accounted for as a sale and we have a continuing involvement with the transferred assets (e.g., servicing) that were outstanding during the nine months endedSeptember 30, 2016, and 2015. Additionally, this table contains information regarding cash flows received from and paid to nonconsolidated securitization entities that existed during each period.

Nine months ended September 30, ($ in millions)	Consumer automotive
2016
Cash proceeds from transfers completed during the period	$	1,659
Servicing fees	27
Other cash flows	6
2015
Cash proceeds from transfers completed during the period	$	1,044
Servicing fees	21

Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together [Table Text Block]

The following tables represent on-balance sheet loans held-for-sale and finance receivable and loans, off-balance sheet securitizations, and whole-loan sales where we have continuing involvement. The tables present quantitative information about delinquencies and net credit losses.

	Total Amount				Amount 60 days or more past due
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
On-balance sheet loans
Consumer automotive	$	64,816	$	64,292	$	603	$	591
Consumer mortgage	10,857		9,773		80		108
Commercial automotive	36,036		34,895		—		—
Commercial other	3,306		2,745		—		—
Total on-balance sheet loans	115,015		111,705		683		699
Off-balance sheet securitization entities
Consumer automotive	2,734		2,529		11		9
Total off-balance sheet securitization entities	2,734		2,529		11		9
Whole-loan sales (a)	3,556		2,252		6		13
Total	$	121,305	$	116,486	$	700	$	721

(a) Whole-loan sales are not part of a securitization transaction, but represent consumer automotive pools of loans sold to third-party investors.

	Net credit losses
	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016		2015
On-balance sheet loans
Consumer automotive	$	219		$	156		$	540	$	384
Consumer mortgage	(6		)	6			4		29
Commercial automotive	—			—			—		—
Commercial other	—			(1		)	—		(2		)
Total on-balance sheet loans	213			161			544		411
Off-balance sheet securitization entities
Consumer automotive	2			1			6		3
Total off-balance sheet securitization entities	2			1			6		3
Whole-loan sales	1			—			2		—
Total	$	216		$	162		$	552	$	414

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Servicing Activities (Tables)

9 Months Ended

Sep. 30, 2016

Servicing Asset [Abstract]

Schedule Of Total Serviced Automobile Loans Outstanding [Table Text Block]

The current unpaid principal balance and any related unamortized deferred fees and costs of total serviced automotive finance loans and leases outstanding were as follows.

($ in millions)	September 30, 2016		December 31, 2015
On-balance sheet automotive finance loans and leases
Consumer automotive	$	64,672	$	64,067
Commercial automotive	36,036		34,895
Operating leases	12,497		15,965
Other	68		72
Off-balance sheet automotive finance loans
Securitizations	2,760		2,550
Whole-loan	3,592		2,259
Total serviced automotive finance loans and leases	$	119,625	$	119,808

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Other Assets (Tables)

9 Months Ended

Sep. 30, 2016

Other Assets [Abstract]

Schedule of Other Assets [Table Text Block]

The components of other assets were as follows.

($ in millions)	September 30, 2016			December 31, 2015
Property and equipment at cost	$	838		$	691
Accumulated depreciation	(507		)	(456		)
Net property and equipment	331			235
Restricted cash collections for securitization trusts (a)	1,473			2,010
Net deferred tax assets	967			1,369
Nonmarketable equity investments (b)	818			418
Other accounts receivable	447			158
Accrued interest and rent receivables	408			402
Goodwill (c)	240			27
Cash reserve deposits held-for-securitization trusts (d)	188			252
Fair value of derivative contracts in receivable position (e)	141			233
Restricted cash and cash equivalents	98			120
Cash collateral placed with counterparties	78			125
Other assets	1,118			972
Total other assets	$	6,307		$	6,321

(a) Represents cash collections from customer payments on securitized receivables. These funds are distributed to investors as payments on the related secured debt.

(b) Includes investments in FHLB stock of $352 million and $391 million and FRB stock of $435 million and $0 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes goodwill of $27 million at our Insurance operations at both September 30, 2016, and December 31, 2015, $193 million and $0 million within Corporate and Other at September 30, 2016, and December 31, 2015, respectively, and $20 million and $0 million within Automotive Finance operations at September 30, 2016, and December 31, 2015, respectively. As a result of our acquisition of TradeKing, we recognized $193 million of goodwill within Corporate and Other on June 1, 2016. On August 1, 2016, we purchased assets from Blue Yield. As a result of this purchase, we recognized $20 million of goodwill within Automotive Finance operations. No other changes in the carrying amount of goodwill were recorded during the nine months endedSeptember 30, 2016.

(d) Represents credit enhancement in the form of cash reserves for various securitization transactions.

(e) For additional information on derivative instruments and hedging activities, refer to Note 20.

Schedule of Goodwill [Table Text Block]

Includes goodwill of $27 million at our Insurance operations at both September 30, 2016, and December 31, 2015, $193 million and $0 million within Corporate and Other at September 30, 2016, and December 31, 2015, respectively, and $20 million and $0 million within Automotive Finance operations at September 30, 2016, and December 31, 2015, respectively. As a result of our acquisition of TradeKing, we recognized $193 million of goodwill within Corporate and Other on June 1, 2016. On August 1, 2016, we purchased assets from Blue Yield. As a result of this purchase, we recognized $20 million of goodwill within Automotive Finance operations. No other changes in the carrying amount of goodwill were recorded during the nine months endedSeptember 30, 2016.

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Deposit Liabilities (Tables)

9 Months Ended

Sep. 30, 2016

Deposits [Abstract]

Schedule of Deposit Liabilities [Table Text Block]

Deposit liabilities consisted of the following.

($ in millions)	September 30, 2016		December 31, 2015
Noninterest-bearing deposits	$	101	$	89
Interest-bearing deposits
Savings and money market checking accounts	44,846		36,386
Certificates of deposit	30,604		29,774
Dealer deposits	193		229
Total deposit liabilities	$	75,744	$	66,478

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Short-term Borrowings (Tables)

9 Months Ended

Sep. 30, 2016

Short-term Debt [Abstract]

Schedule of Short-term Debt [Table Text Block]

The following table presents the composition of our short-term borrowings portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured (a)		Total		Unsecured		Secured (a)		Total
Demand notes	$	3,525	$	—	$	3,525	$	3,369	$	—	$	3,369
Federal Home Loan Bank	—		2,250		2,250		—		4,000		4,000
Securities sold under agreements to repurchase	—		659		659		—		648		648
Other	—		—		—		84		—		84
Total short-term borrowings	$	3,525	$	2,909	$	6,434	$	3,453	$	4,648	$	8,101

(a) Refer to Note 14 for further details on assets restricted as collateral for payment of the related debt.

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Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2016

Long-term Debt, Unclassified [Abstract]

Long-term Debt Portfolio [Table Text Block]

The following table presents the composition of our long-term debt portfolio.

	September 30, 2016						December 31, 2015
($ in millions)	Unsecured		Secured		Total		Unsecured		Secured			Total
Long-term debt
Due within one year	$	3,279	$	11,805	$	15,084	$	1,829	$	9,427		$	11,256
Due after one year (a)	16,410		24,861		41,271		18,803		35,844			54,647
Fair value adjustment (b)	471		10		481		334		(3		)	331
Total long-term debt (c)	$	20,160	$	36,676	$	56,836	$	20,966	$	45,268		$	66,234

(a) Includes $2.6 billion of trust preferred securities at both September 30, 2016, and December 31, 2015.

(b) Represents the fair value adjustment associated with the application of hedge accounting on certain of our long-term debt positions. Refer to Note 20 for additional information.

(c) Includes advances from the Federal Home Loan Bank of Pittsburgh of $6.1 billion and $5.4 billion at September 30, 2016, and December 31, 2015, respectively.

Scheduled Remaining Maturity of Long-term Debt [Table Text Block]

The following table presents the scheduled remaining maturity of long-term debt at September 30, 2016, assuming no early redemptions will occur. The actual payment of secured debt may vary based on the payment activity of the related pledged assets.

($ in millions)	2016			2017			2018			2019			2020			2021 and thereafter			Fair value adjustment		Total
Unsecured
Long-term debt	$	19		$	4,365		$	3,700		$	1,662		$	2,212		$	9,078		$	471	$	21,507
Original issue discount	(21		)	(91		)	(101		)	(39		)	(39		)	(1,056		)	—		(1,347		)
Total unsecured	(2		)	4,274			3,599			1,623			2,173			8,022			471		20,160
Secured
Long-term debt	2,118			11,855			7,512			7,197			4,155			3,829			10		36,676
Total long-term debt	$	2,116		$	16,129		$	11,111		$	8,820		$	6,328		$	11,851		$	481	$	56,836

Pledged assets for the payment of the related secured borrowings and repurchase agreements [Table Text Block]

The following summarizes assets restricted as collateral for the payment of the related debt obligation primarily arising from securitization transactions accounted for as secured borrowings and repurchase agreements.

	September 30, 2016					December 31, 2015
($ in millions)	Total			Ally Bank (a)		Total			Ally Bank (a)
Investment securities(b)	$	586		$	—	$	2,420		$	1,761
Mortgage assets held-for-investment and lending receivables	10,770			10,770		9,743			9,743
Consumer automotive finance receivables	28,870			5,485		34,324			9,167
Commercial automotive finance receivables	19,275			19,020		19,623			19,177
Investment in operating leases, net	2,706			1,290		5,539			3,205
Other assets (b)	93			—		—			—
Total assets restricted as collateral (c) (d)	$	62,300		$	36,565	$	71,649		$	43,053
Secured debt	$	39,585	(e)	$	17,736	$	49,916	(e)	$	24,787

(a) Ally Bank is a component of the total column.

(b) Certain investment securities and other assets are restricted under repurchase agreements. Refer to Note 13 for information on the repurchase agreements.

(c) Ally Bank has an advance agreement with the FHLB, and had assets pledged to secure borrowings that were restricted as collateral to the FHLB totaling $14.5 billion and $14.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed primarily of consumer mortgage finance receivables and loans, net and investment securities. Ally Bank has access to the Federal Reserve Bank Discount Window. Ally Bank had assets pledged and restricted as collateral to the Federal Reserve Bank totaling $2.4 billion and $2.9 billion at September 30, 2016, and December 31, 2015, respectively. These assets were composed of consumer automotive finance receivables and loans, net and investment in operating leases, net. Availability under these programs is only for the operations of Ally Bank and cannot be used to fund the operations or liabilities of Ally or its subsidiaries.

(d) Excludes restricted cash and cash reserves for securitization trusts recorded within other assets on the Condensed Consolidated Balance Sheet. Refer to Note 11 for additional information.

(e) Includes $2.9 billion and $4.6 billion of short-term borrowings at September 30, 2016, and December 31, 2015, respectively.

Schedule Of Committed Funding Facilities [Table Text Block]

Committed Funding Facilities

	Outstanding				Unused capacity (a)				Total capacity
($ in millions)	September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015		September 30, 2016		December 31, 2015
Bank funding
Secured (b)	$	2,950	$	3,250	$	650	$	—	$	3,600	$	3,250
Parent funding
Secured	11,725		16,914		2,800		251		14,525		17,165
Total committed facilities	$	14,675	$	20,164	$	3,450	$	251	$	18,125	$	20,415

(a) Funding from committed secured facilities is available on request in the event excess collateral resides in certain facilities or is available to the extent incremental collateral is available and contributed to the facilities.

(b) Excludes off-balance sheet credit facility amounts.

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Accrued Expenses and Other Liabilities (Tables)

9 Months Ended

Sep. 30, 2016

Accounts Payable and Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

The components of accrued expenses and other liabilities were as follows.

($ in millions)	September 30, 2016		December 31, 2015
Accounts payable	$	781	$	391
Employee compensation and benefits	218		242
Reserves for insurance losses and loss adjustment expenses	150		169
Cash collateral received from counterparties	113		82
Deferred revenue	66		108
Fair value of derivative contracts in payable position (a)	46		145
Other liabilities	424		408
Total accrued expenses and other liabilities	$	1,798	$	1,545

(a) For additional information on derivative instruments and hedging activities, refer to Note 20.

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Preferred Stock (Tables)

9 Months Ended

Sep. 30, 2016

Preferred Stock, Including Additional Paid in Capital [Abstract]

Schedule of Stock by Class [Table Text Block]

The following table summarizes information about our Series A Preferred Stock.

	September 30, 2016			December 31, 2015
Series A preferred stock
Carrying value ($ in millions)	$	—		$	696
Par value (per share)	—			0.01
Liquidation preference (per share)	—			25
Number of shares authorized	—			40,870,560
Number of shares issued and outstanding	—			27,870,560
Dividend/coupon
Prior to May 15, 2016	—		%	8.5		%
On and after May 15, 2016	—		%	Three month LIBOR + 6.243%

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Accumulated Other Comprehensive (Loss) Income (Tables)

9 Months Ended

Sep. 30, 2016

Accumulated Other Comprehensive Income (Loss) [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents changes, net of tax, in each component of accumulated other comprehensive (loss) income.

($ in millions)	Unrealized (losses) gains on investment securities (a)			Translation adjustments and net investment hedges (b)			Cash flow hedges		Defined benefit pension plans			Accumulated other comprehensive (loss) income
Balance at December 31, 2014	$	(21	)	$	36		$	7	$	(88	)	$	(66	)
2015 net change	(35		)	(21		)	—		—			(56		)
Balance at September 30, 2015	$	(56	)	$	15		$	7	$	(88	)	$	(122	)
Balance at December 31, 2015	$	(159	)	$	9		$	8	$	(89	)	$	(231	)
2016 net change	258			5			—		(1		)	262
Balance at September 30, 2016	$	99		$	14		$	8	$	(90	)	$	31

(a) Represents the after-tax difference between the fair value and amortized cost of our available-for-sale securities portfolio.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

The following tables present the before- and after-tax changes in each component of accumulated other comprehensive (loss) income.

Three months ended September 30, 2016 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	41			$	(4	)		$	37
Less: Net realized gains reclassified to income from continuing operations	52			(a)	(11		)	(b)	41
Net change	(11		)		7				(4		)
Translation adjustments
Net unrealized losses arising during the period	(2		)		1				(1		)
Net investment hedges
Net unrealized gains arising during the period	2				(1		)		1
Other comprehensive loss	$	(11	)		$	7			$	(4	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Three months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	106			$	(41	)		$	65
Less: Net realized gains reclassified to income from continuing operations	6			(a)	(3		)	(b)	3
Net change	100				(38		)		62
Translation adjustments
Net unrealized losses arising during the period	(17		)		5				(12		)
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	(16		)		5				(11		)
Net investment hedges
Net unrealized gains arising during the period	15				(5		)		10
Other comprehensive income	$	99			$	(38	)		$	61

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Nine months ended September 30, 2016($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	506			$	(133	)		$	373
Less: Net realized gains reclassified to income from continuing operations	145			(a)	(30		)	(b)	115
Net change	361				(103		)		258
Translation adjustments
Net unrealized gains arising during the period	10				(4		)		6
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(1		)		—				(1		)
Net change	11				(4		)		7
Net investment hedges
Net unrealized losses arising during the period	(4		)		2				(2		)
Defined benefit pension plans
Net unrealized losses arising during the period	(1		)		—				(1		)
Other comprehensive income	$	367			$	(105	)		$	262

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

Nine months ended September 30, 2015 ($ in millions)	Before Tax				Tax Effect				After Tax
Investment securities
Net unrealized gains arising during the period	$	53			$	(21	)		$	32
Less: Net realized gains reclassified to income from continuing operations	106			(a)	(39		)	(b)	67
Net change	(53		)		18				(35		)
Translation adjustments
Net unrealized losses arising during the period	(33		)		11				(22		)
Less: Net realized gains reclassified to income from discontinued operations, net of tax	42				(20		)		22
Net change	(75		)		31				(44		)
Net investment hedges
Net unrealized gains arising during the period	31				(11		)		20
Less: Net realized losses reclassified to income from discontinued operations, net of tax	(4		)		1				(3		)
Net change	35				(12		)		23
Other comprehensive loss	$	(93	)		$	37			$	(56	)

(a) Includes gains reclassified to other gain on investments, net in our Condensed Consolidated Statement of Comprehensive Income.

(b) Includes amounts reclassified to income tax expense (benefit) from continuing operations in our Condensed Consolidated Statement of Comprehensive Income.

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Earnings per Common Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents the calculation of basic and diluted earnings per common share.

	Three months ended September 30,						Nine months ended September 30,
($ in millions, except share data) (a)	2016			2015			2016			2015
Net income from continuing operations	$	261		$	273		$	865		$	621
Preferred stock dividends (b)	—			(38		)	(30		)	(1,356		)
Net income (loss) from continuing operations attributable to common shareholders	261			235			835			(735		)
(Loss) income from discontinued operations, net of tax	(52		)	(5		)	(46		)	405
Net income (loss) attributable to common shareholders	$	209		$	230		$	789		$	(330	)
Basic weighted-average common shares outstanding (c)	482,392,811			483,073,329			483,992,930			482,725,342
Diluted weighted-average common shares outstanding (c) (d)	483,575,307			484,399,091			484,762,142			482,725,342
Basic earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.73		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.48		$	1.63		$	(0.68	)
Diluted earnings per common share
Net income (loss) from continuing operations	$	0.54		$	0.49		$	1.72		$	(1.52	)
(Loss) income from discontinued operations, net of tax	(0.11		)	(0.01		)	(0.10		)	0.84
Net income (loss)	$	0.43		$	0.47		$	1.63		$	(0.68	)

(a) Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

(b) Preferred stock dividends for the three months and nine months endedSeptember 30, 2015, include $1,193 million recognized in connection with the partial redemption of the Series G Preferred Stock and the repurchase of the Series A Preferred Stock. These dividends represent an additional return to preferred shareholders calculated as the excess consideration paid over the carrying amount derecognized.

(c) Includes shares related to share-based compensation that vested but were not yet issued for the three months and nine months endedSeptember 30, 2016, and 2015, respectively.

(d) Due to the antidilutive effect of the net loss from continuing operations attributable to common shareholders for the nine months endedSeptember 30, 2015, basic weighted-average common shares outstanding was used to calculate basic and diluted earnings per share.

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Regulatory Capital and Other Regulatory Matters (Tables)

9 Months Ended

Sep. 30, 2016

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

The following table summarizes our capital ratios under the U.S. Basel III capital framework.

	September 30, 2016				December 31, 2015				Required minimum			Well-capitalized minimum
($ in millions)	Amount		Ratio		Amount		Ratio
Capital ratios
Common Equity Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	12,913	9.53	%	$	12,507	9.21	%	4.50	%		(a)
Ally Bank	17,537		17.21		16,594		17.05		4.50			6.50	%
Tier 1 (to risk-weighted assets)
Ally Financial Inc.	$	15,087	11.13	%	$	15,077	11.10	%	6.00	%		6.00	%
Ally Bank	17,537		17.21		16,594		17.05		6.00			8.00
Total (to risk-weighted assets)
Ally Financial Inc.	$	17,343	12.80	%	$	17,005	12.52	%	8.00	%		10.00	%
Ally Bank	18,069		17.73		17,043		17.51		8.00			10.00
Tier 1 leverage (to adjusted quarterly average assets) (b)
Ally Financial Inc.	$	15,087	9.73	%	$	15,077	9.73	%	4.00	%		(a)
Ally Bank	17,537		15.45		16,594		15.38		15.00		(c)	5.00	%

(a) Currently, there is no ratio component for determining whether a BHC is "well-capitalized."

(b) Federal regulatory reporting guidelines require the calculation of adjusted quarterly average assets using a daily average methodology.

(c) Ally Bank has committed to the FRB to maintain a Tier 1 leverage ratio of at least 15%.

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Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Value Amounts of Derivative Instruments Reported On Our Condensed Consolidated Balance Sheet [Table Text Block]

The following table summarizes the fair value amounts of derivative instruments reported on our Condensed Consolidated Balance Sheet. The fair value amounts are presented on a gross basis, are segregated by derivatives that are designated and qualifying as hedging instruments or those that are not, and are further segregated by type of contract within those two categories. Notional amounts are reference amounts from which contractual obligations are derived and are not recorded on the balance sheet. In our view, derivative notional is not an accurate measure of our derivative exposure when viewed in isolation from other factors, such as market rate fluctuations and counterparty credit risk.

	September 30, 2016						December 31, 2015
	Derivative contracts in a				Notional amount		Derivative contracts in a				Notional amount
($ in millions)	receivable position (a)		payable position (b)				receivable position (a)		payable position (b)
Derivatives designated as accounting hedges
Interest rate contracts
Swaps (c) (d) (e)	$	114	$	7	$	6,754	$	126	$	9	$	14,151
Foreign exchange contracts
Forwards	—		—		221		—		1		189
Total derivatives designated as accounting hedges	114		7		6,975		126		10		14,340
Derivatives not designated as accounting hedges
Interest rate contracts
Swaps	5		15		864		30		51		6,101
Futures and forwards	—		—		—		2		2		1,905
Written options	—		20		15,206		—		72		18,220
Purchased options	21		—		15,206		73		—		18,240
Total interest rate risk	26		35		31,276		105		125		44,466
Foreign exchange contracts
Futures and forwards	1		—		111		—		—		278
Total foreign exchange risk	1		—		111		—		—		278
Equity contracts
Forwards	—		4		17		—		9		32
Written options	—		—		—		—		1		—
Purchased options	—		—		—		2		—		—
Total equity risk	—		4		17		2		10		32
Total derivatives not designated as accounting hedges	27		39		31,404		107		135		44,776
Total derivatives	$	141	$	46	$	38,379	$	233	$	145	$	59,116

(a) Derivative contracts in a receivable position are classified as other assets on the Condensed Consolidated Balance Sheet, and includes accrued interest of $7 million and $46 million at September 30, 2016, and December 31, 2015, respectively.

(b) Derivative contracts in a liability position are classified as accrued expenses and other liabilities on the Condensed Consolidated Balance Sheet, and includes accrued interest of $1 million and $12 million at September 30, 2016, and December 31, 2015, respectively.

(c) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate unsecured debt obligations with $104 million and $112 million in a receivable position, $0 million and $3 million in a payable position, and a $2.3 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively. The hedge notional amount of $2.3 billion at September 30, 2016, is associated with debt maturing in five or more years.

(d) Includes fair value hedges consisting of receive-fixed swaps on fixed-rate secured debt obligations (FHLB Advances) with $10 million and $1 million in a receivable position, $0 million and $2 million in a payable position, and a $898 million and $500 million notional amount at September 30, 2016, and December 31, 2015, respectively.

(e) Other fair value hedges include pay-fixed swaps on portfolios of held-for-investment automotive loan assets with $0 million and $13 million in a receivable position, $7 million and $3 million in a payable position, and a $3.5 billion and $6.8 billion notional amount at September 30, 2016, and December 31, 2015, respectively.

Gains and Losses On Derivative Instruments Reported in Statement of Comprehensive Income [Table Text Block]

The following table summarizes the location and amounts of gains and losses on derivative instruments reported in our Condensed Consolidated Statement of Comprehensive Income.

	Three months ended September 30,						Nine months ended September 30,
($ in millions)	2016			2015			2016			2015
Derivatives qualifying for hedge accounting
Gain (loss) recognized in earnings on derivatives
Interest rate contracts
Interest and fees on finance receivables and loans (a)	$	16		$	(34	)	$	(18	)	$	(50	)
Interest on long-term debt (b) (c)	(31		)	132			211			121
(Loss) gain recognized in earnings on hedged items
Interest rate contracts
Interest and fees on finance receivables and loans (d)	(17		)	38			16			73
Interest on long-term debt (e)	32			(135		)	(214		)	(128		)
Total derivatives qualifying for hedge accounting	—			1			(5		)	16
Derivatives not designated as accounting hedges
Loss recognized in earnings on derivatives
Interest rate contracts
Loss on mortgage and automotive loans, net	—			(2		)	—			(2		)
Other income, net of losses	(5		)	—			(2		)	(9		)
Total interest rate contracts	(5		)	(2		)	(2		)	(11		)
Foreign exchange contracts (f)
Interest on long-term debt	—			(1		)	(2		)	(139		)
Other income, net of losses	(1		)	1			(4		)	9
Total foreign exchange contracts	(1		)	—			(6		)	(130		)
Equity contracts
Compensation and benefits expense	2			(4		)	—			(7		)
Total equity contracts	2			(4		)	—			(7		)
Loss recognized in earnings on derivatives	$	(4	)	$	(5	)	$	(13	)	$	(132	)

(a) Amounts exclude losses related to interest for qualifying accounting hedges of retail automotive loans held-for-investment, which are primarily offset by the fixed coupon payments of the loans. The losses were $4 million and $18 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $16 million and $50 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(b) Amounts exclude gains related to interest for qualifying accounting hedges of unsecured debt, which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $7 million and $24 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $34 million and $71 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(c) Amounts exclude gains related to interest for qualifying accounting hedges of secured debt (FHLB Advances), which are primarily offset by the fixed coupon payment on the long-term debt. The gains were $1 million for the three months endedSeptember 30, 2016, and $4 million for the nine months endedSeptember 30, 2016.

(d) Amounts exclude losses related to amortization of deferred loan basis adjustments on the de-designated hedged item of $6 million and $1 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $15 million and $1 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(e) Amounts exclude gains related to amortization of deferred debt basis adjustments on the de-designated hedged item of $23 million and $14 million for the three months endedSeptember 30, 2016, and 2015, respectively, and $62 million and $59 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

(f) Amounts exclude gains and losses related to the revaluation of the related foreign-denominated debt or receivable. Gains of $1 million were recognized for the three months endedSeptember 30, 2016, and 2015, and gains of $4 million and $134 million were recognized for the nine months endedSeptember 30, 2016, and 2015, respectively.

Derivative Instruments Used in Cash Flow and Net Investment Hedge Accounting Relationships [Table Text Block]

The following table summarizes derivative instruments used in cash flow and net investment hedge accounting relationships.

	Three months ended September 30,				Nine months ended September 30,
($ in millions)	2016		2015		2016			2015
Foreign exchange contracts
Loss reclassified from accumulated other comprehensive loss to income from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Total loss from discontinued operations, net	$	—	$	—	$	—		$	(4	)
Gain (loss) recognized in other comprehensive income (a)	$	2	$	15	$	(4	)	$	35

(a) The amounts represent the effective portion of net investment hedges. There are offsetting amounts recognized in accumulated other comprehensive income (loss) related to the revaluation of the related net investment in foreign operations, including the tax impacts of the hedge and related net investment, as disclosed separately in Note 17. There were losses of $2 million and $16 million for the three months endedSeptember 30, 2016, and 2015, respectively. There were gains of $9 million and losses of $56 million for the nine months ended September 30, 2016, and 2015, respectively.

XML

Fair Value (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Fair Value Measurements - Recurring Basis [Table Text Block]

The following tables display the assets and liabilities measured at fair value on a recurring basis including financial instruments elected for the fair value option. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The tables below display the hedges separately from the hedged items; therefore, they do not directly display the impact of our risk management activities.

	Recurring fair value measurements
September 30, 2016($ in millions)	Level 1		Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	321	$	—		$	—	$	321
U.S. States and political subdivisions	—		763			—		763
Foreign government	11		169			—		180
Mortgage-backed residential	—		12,143			—		12,143
Mortgage-backed commercial	—		524			—		524
Asset-backed	—		1,570			—		1,570
Corporate debt	—		1,630			—		1,630
Total debt securities	332		16,799			—		17,131
Equity securities (a)	570		—			—		570
Total available-for-sale securities	902		16,799			—		17,701
Other assets
Interests retained in financial asset sales	—		—			32		32
Derivative contracts in a receivable position (b)
Interest rate	—		140			—		140
Foreign currency	—		1			—		1
Total derivative contracts in a receivable position	—		141			—		141
Total assets	$	902	$	16,940		$	32	$	17,874
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	—	$	(42	)	$	—	$	(42	)
Other	—		(4		)	—		(4		)
Total derivative contracts in a payable position	—		(46		)	—		(46		)
Total liabilities	$	—	$	(46	)	$	—	$	(46	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

	Recurring fair value measurements
December 31, 2015 ($ in millions)	Level 1			Level 2			Level 3		Total
Assets
Investment securities
Available-for-sale securities
Debt securities
U.S. Treasury and federal agencies	$	1,469		$	272		$	—	$	1,741
U.S. States and political subdivisions	—			716			—		716
Foreign government	10			167			—		177
Mortgage-backed residential	—			10,366			—		10,366
Mortgage-backed commercial	—			481			—		481
Asset-backed	—			1,755			—		1,755
Corporate debt	—			1,204			—		1,204
Total debt securities	1,479			14,961			—		16,440
Equity securities (a)	717			—			—		717
Total available-for-sale securities	2,196			14,961			—		17,157
Other assets
Interests retained in financial asset sales	—			—			40		40
Derivative contracts in a receivable position (b)
Interest rate	2			229			—		231
Other	2			—			—		2
Total derivative contracts in a receivable position	4			229			—		233
Total assets	$	2,200		$	15,190		$	40	$	17,430
Liabilities
Accrued expenses and other liabilities
Derivative contracts in a payable position (b)
Interest rate	$	(2	)	$	(133	)	$	—	$	(135	)
Foreign currency	—			(1		)	—		(1		)
Other	(1		)	(8		)	—		(9		)
Total derivative contracts in a payable position	(3		)	(142		)	—		(145		)
Total liabilities	$	(3	)	$	(142	)	$	—	$	(145	)

(a) Our investment in any one industry did not exceed 14%.

(b) For additional information on derivative instruments and hedging activities, refer to Note 20.

Fair Value Measurements - Reconciliation of Level 3 Assets and Liabilities [Table Text Block]

The following tables present the reconciliation for all Level 3 assets and liabilities measured at fair value on a recurring basis. We often economically hedge the fair value change of our assets or liabilities with derivatives and other financial instruments. The Level 3 items presented below may be hedged by derivatives and other financial instruments that are classified as Level 1 or Level 2. Thus, the following tables do not fully reflect the impact of our risk management activities.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at July 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	31	$	1	(a)	$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—
Total assets	$	31	$	1		$	—	$	—	$	2	$	—	$	(2	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at July 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	4	$	—	(a)	$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	32		1		(a)	—		—		—			1		(5		)	29		—
Total assets	$	36	$	1		$	—	$	—	$	(4	)	$	1	$	(5	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
			Net realized/unrealized gains														Fair value at September 30, 2016		Net unrealized gains included in earnings still held at September 30, 2016
($ in millions)	Fair value at Jan. 1, 2016		included in earnings			included in OCI		Purchases		Sales		Issuances		Settlements
Assets
Other assets
Interests retained in financial asset sales	$	40	$	4	(a)	$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—
Total assets	$	40	$	4		$	—	$	—	$	8	$	—	$	(20	)	$	32	$	—

(a) Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income.

	Level 3 recurring fair value measurements
	Fair value at Jan. 1, 2015		Net realized/unrealized gains					Purchases		Sales			Issuances		Settlements			Fair value at September 30, 2015		Net unrealized gains included in earnings still held at September 30, 2015
($ in millions)			included in earnings			included in OCI
Assets
Mortgage loans held-for-sale, net	$	3	$	1		$	—	$	—	$	(4	)	$	—	$	—		$	—	$	—
Other assets
Interests retained in financial asset sales	47		8		(a)	—		—		—			2		(28		)	29		—
Total assets	$	50	$	9		$	—	$	—	$	(4	)	$	2	$	(28	)	$	29	$	—

(a)    Reported as other income, net of losses, in the Condensed Consolidated Statement of Comprehensive Income

Fair Value Measurements - Nonrecurring Basis [Table Text Block]

The following tables display the assets and liabilities measured at fair value on a nonrecurring basis.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2016($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net	$	—	$	—	$	56	$	56	$	—		n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		30		30		(7		)	n/m	(a)	n/m	(a)
Other	—		—		45		45		(17		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		75		75		(24		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		15		15		(4		)	n/m	(a)	n/m	(a)
Other	—		—		7		7		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	153	$	153	$	(28	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2016. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

	Nonrecurring fair value measurements								Lower-of-cost or fair value or valuation reserve allowance			Total gain included in earnings for the three months ended		Total gain included in earnings for the nine months ended
September 30, 2015 ($ in millions)	Level 1		Level 2		Level 3		Total
Assets
Loans held-for-sale, net
Other	$	—	—		37		37		—			n/m	(a)	n/m	(a)
Total loans held-for-sale, net	—		—		37		37		—			n/m	(a)	n/m	(a)
Commercial finance receivables and loans, net (b)
Automotive	—		—		13		13		(4		)	n/m	(a)	n/m	(a)
Other	—		—		30		30		(15		)	n/m	(a)	n/m	(a)
Total commercial finance receivables and loans, net	—		—		43		43		(19		)	n/m	(a)	n/m	(a)
Other assets
Repossessed and foreclosed assets (c)	—		—		9		9		(3		)	n/m	(a)	n/m	(a)
Other	—		—		2		2		—			n/m	(a)	n/m	(a)
Total assets	$	—	$	—	$	91	$	91	$	(22	)	n/m		n/m

n/m = not meaningful

(a) We consider the applicable valuation or loan loss allowance to be the most relevant indicator of the impact on earnings caused by the fair value measurement. Accordingly, the table above excludes total gains and losses included in earnings for these items. The carrying values are inclusive of the respective valuation or loan loss allowance.

(b) Represents the portion of the portfolio specifically impaired during 2015. The related valuation allowance represents the cumulative adjustment to fair value of those specific receivables.

(c) The allowance provided for repossessed and foreclosed assets represents any cumulative valuation adjustment recognized to adjust the assets to fair value.

Fair Value of Financial Intruments [Table Text Block]

The following table presents the carrying and estimated fair value of financial instruments, except for those recorded at fair value on a recurring basis presented in the previous section of this note titled Recurring Fair Value. When possible, we use quoted market prices to determine fair value. Where quoted market prices are not available, the fair value is internally derived based on appropriate valuation methodologies with respect to the amount and timing of future cash flows and estimated discount rates. However, considerable judgment is required in interpreting current market data to develop the market assumptions and inputs necessary to estimate fair value. As such, the actual amount received to sell an asset or the amount paid to settle a liability could differ from our estimates. Fair value information presented herein was based on information available at September 30, 2016, and December 31, 2015.

			Estimated fair value
($ in millions)	Carrying value		Level 1		Level 2		Level 3		Total
September 30, 2016
Financial assets
Held-to-maturity securities	$	649	$	—	$	658	$	—	$	658
Loans held-for-sale, net	56		—		—		56		56
Finance receivables and loans, net	113,825		—		—		114,847		114,847
Nonmarketable equity investments	818		—		787		50		837
Financial liabilities
Deposit liabilities	$	75,744	$	—	$	—	$	76,231	$	76,231
Short-term borrowings	6,434		—		—		6,435		6,435
Long-term debt	56,836		—		22,405		36,790		59,195
December 31, 2015
Financial assets
Loans held-for-sale, net	$	105	$	—	$	—	$	105	$	105
Finance receivables and loans, net	110,546		—		—		110,737		110,737
Nonmarketable equity investments	418		—		391		42		433
Financial liabilities
Deposit liabilities	$	66,478	$	—	$	—	$	66,889	$	66,889
Short-term borrowings	8,101		—		—		8,102		8,102
Long-term debt	66,234		—		23,018		45,157		68,175

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Offsetting Assets and Liabilities Offsetting Assets and Liabilities (Assets) (Tables)

9 Months Ended

Sep. 30, 2016

Offsetting Assets and Liabilities [Abstract]

Offsetting Assets [Table Text Block]

The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
September 30, 2016($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	140		$	—	$	140		$	(15	)	$	(104	)	$	21
Derivative assets in net liability positions	1			—		1			(1		)	—			—
Total assets (d)	$	141		$	—	$	141		$	(16	)	$	(104	)	$	21
Liabilities
Derivative liabilities in net liability positions	$	(28	)	$	—	$	(28	)	$	—		$	7		$	(21	)
Derivative liabilities in net asset positions	(15		)	—		(15		)	15			—			—
Derivative liabilities with no offsetting arrangements	(3		)	—		(3		)	—			—			(3		)
Total derivative liabilities (d)	(46		)	—		(46		)	15			7			(24		)
Securities sold under agreements to repurchase (e)	(659		)	—		(659		)	—			659			—
Total liabilities	$	(705	)	$	—	$	(705	)	$	15		$	666		$	(24	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $2 million of noncash derivative collateral pledged to us was excluded at September 30, 2016. We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $2 million at September 30, 2016. We have not sold or pledged any of the noncash collateral received under these agreements as of September 30, 2016.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
December 31, 2015 ($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	224		$	—	$	224		$	(69	)	$	(67	)	$	88
Derivative assets in net liability positions	9			—		9			(9		)	—			—
Total assets (d)	$	233		$	—	$	233		$	(78	)	$	(67	)	$	88
Liabilities
Derivative liabilities in net liability positions	$	(68	)	$	—	$	(68	)	$	9		$	2		$	(57	)
Derivative liabilities in net asset positions	(69		)	—		(69		)	69			—			—
Derivative liabilities with no offsetting arrangements	(8		)	—		(8		)	—			—			(8		)
Total derivative liabilities (d)	(145		)	—		(145		)	78			2			(65		)
Securities sold under agreements to repurchase (e)	(648		)	—		(648		)	—			648			—
Total liabilities	$	(793	)	$	—	$	(793	)	$	78		$	650		$	(65	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $7 million of noncash derivative collateral pledged to us was excluded at December 31, 2015. We do not record such collateral received on our Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $7 million at December 31, 2015. We have not sold or pledged any of the noncash collateral received under these agreements as of December 31, 2015.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

XML

Offsetting Assets and Liabilities Offsetting Assets and Liabilities (Liabilities) (Tables)

9 Months Ended

Sep. 30, 2016

Offsetting Liabilities [Abstract]

Offsetting Liabilities [Table Text Block]

The composition of offsetting derivative instruments, financial assets, and financial liabilities was as follows.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
September 30, 2016($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	140		$	—	$	140		$	(15	)	$	(104	)	$	21
Derivative assets in net liability positions	1			—		1			(1		)	—			—
Total assets (d)	$	141		$	—	$	141		$	(16	)	$	(104	)	$	21
Liabilities
Derivative liabilities in net liability positions	$	(28	)	$	—	$	(28	)	$	—		$	7		$	(21	)
Derivative liabilities in net asset positions	(15		)	—		(15		)	15			—			—
Derivative liabilities with no offsetting arrangements	(3		)	—		(3		)	—			—			(3		)
Total derivative liabilities (d)	(46		)	—		(46		)	15			7			(24		)
Securities sold under agreements to repurchase (e)	(659		)	—		(659		)	—			659			—
Total liabilities	$	(705	)	$	—	$	(705	)	$	15		$	666		$	(24	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $2 million of noncash derivative collateral pledged to us was excluded at September 30, 2016. We do not record such collateral received on our Condensed Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $2 million at September 30, 2016. We have not sold or pledged any of the noncash collateral received under these agreements as of September 30, 2016.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

	Gross amounts of recognized assets/(liabilities)			Gross amounts offset in the Condensed Consolidated Balance Sheet		Net amounts of assets/(liabilities) presented in the Condensed Consolidated Balance Sheet
									Gross amounts not offset in the Condensed Consolidated Balance Sheet
December 31, 2015 ($ in millions)									Financial instruments			Collateral (a) (b) (c)			Net amount
Assets
Derivative assets in net asset positions	$	224		$	—	$	224		$	(69	)	$	(67	)	$	88
Derivative assets in net liability positions	9			—		9			(9		)	—			—
Total assets (d)	$	233		$	—	$	233		$	(78	)	$	(67	)	$	88
Liabilities
Derivative liabilities in net liability positions	$	(68	)	$	—	$	(68	)	$	9		$	2		$	(57	)
Derivative liabilities in net asset positions	(69		)	—		(69		)	69			—			—
Derivative liabilities with no offsetting arrangements	(8		)	—		(8		)	—			—			(8		)
Total derivative liabilities (d)	(145		)	—		(145		)	78			2			(65		)
Securities sold under agreements to repurchase (e)	(648		)	—		(648		)	—			648			—
Total liabilities	$	(793	)	$	—	$	(793	)	$	78		$	650		$	(65	)

(a) Financial collateral received/pledged shown as a balance based on the sum of all net asset and liability positions between Ally and each individual derivative counterparty.

(b) Amounts disclosed are limited to the financial asset or liability balance and, accordingly, exclude excess collateral received or pledged and noncash collateral received. $7 million of noncash derivative collateral pledged to us was excluded at December 31, 2015. We do not record such collateral received on our Consolidated Balance Sheet unless certain conditions are met.

(c) Certain agreements grant us the right to sell or pledge the noncash assets we receive as collateral. Noncash collateral pledged to us where the agreement grants us the right to sell or pledge the underlying assets had a fair value of $7 million at December 31, 2015. We have not sold or pledged any of the noncash collateral received under these agreements as of December 31, 2015.

(d) For additional information on derivative instruments and hedging activities, refer to Note 20.

(e) For additional information on securities sold under agreements to repurchase, refer to Note 13.

XML

Segment and Geographic Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Financial information for our reportable operating segments is summarized as follows.

Three months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	933	$	14	$	25	$	30	$	(6	)	$	996
Other revenue	74		264		—		4		46			388
Total net revenue	1,007		278		25		34		40			1,384
Provision for loan losses	270		—		1		3		(16		)	258
Total noninterest expense	418		222		16		16		63			735
Income (loss) from continuing operations before income tax expense	$	319	$	56	$	8	$	15	$	(7	)	$	391
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	870	$	16	$	17	$	22	$	45		$	970
Other revenue	63		233		—		10		26			332
Total net revenue	933		249		17		32		71			1,302
Provision for loan losses	201		—		3		4		3			211
Total noninterest expense	409		209		10		14		32			674
Income from continuing operations before income tax expense	$	323	$	40	$	4	$	14	$	36		$	417
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $738 million and $759 million for the three months endedSeptember 30, 2016, and 2015, respectively.

Nine months ended September 30, ($ in millions)	Automotive Finance operations		Insurance operations		Mortgage Finance operations		Corporate Finance operations		Corporate and Other			Consolidated (a)
2016
Net financing revenue (loss)	$	2,758	$	44	$	71	$	87	$	(29	)	$	2,931
Other revenue	228		777		—		14		119			1,138
Total net revenue	2,986		821		71		101		90			4,069
Provision for loan losses	649		—		4		12		(15		)	650
Total noninterest expense	1,255		733		48		49		133			2,218
Income (loss) from continuing operations before income tax expense	$	1,082	$	88	$	19	$	40	$	(28	)	$	1,201
Total assets	$	113,669	$	7,259	$	7,933	$	3,232	$	25,304		$	157,397
2015
Net financing revenue	$	2,529	$	42	$	39	$	64	$	62		$	2,736
Other revenue (loss)	170		769		—		22		(175		)	786
Total net revenue (loss)	2,699		811		39		86		(113		)	3,522
Provision for loan losses	460		—		9		3		(5		)	467
Total noninterest expense	1,237		678		28		42		108			2,093
Income (loss) from continuing operations before income tax expense	$	1,002	$	133	$	2	$	41	$	(216	)	$	962
Total assets	$	113,843	$	6,997	$	6,326	$	2,269	$	26,481		$	155,916

(a) Net financing revenue after the provision for loan losses totaled $2,281 million and $2,269 million for the nine months endedSeptember 30, 2016, and 2015, respectively.

Information Concerning Principal Geographic Areas [Table Text Block]

Information concerning principal geographic areas was as follows.

Three months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss)
2016
Canada	$	22	$	10	$	9
Europe	—		—		(1		)
Latin America	—		—		(1		)
Total foreign (b)	22		10		7
Total domestic (c)	1,362		381		202
Total	$	1,384	$	391	$	209
2015
Canada	$	24	$	11	$	9
Europe	—		1		—
Total foreign (b)	24		12		9
Total domestic (c)	1,278		405		259
Total	$	1,302	$	417	$	268

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(c) Amounts include eliminations between our domestic and foreign operations.

Nine months ended September 30, ($ in millions)	Revenue (a)		Income from continuing operations before income tax expense		Net income (loss) (b)
2016
Canada	$	67	$	32	$	27
Europe	—		—		(4		)
Latin America	—		—		(1		)
Total foreign (c)	67		32		22
Total domestic (d)	4,002		1,169		797
Total	$	4,069	$	1,201	$	819
2015
Canada	$	76	$	35	$	30
Europe	1		5		28
Asia-Pacific	—		—		452
Total foreign (c)	77		40		510
Total domestic (d)	3,445		922		516
Total	$	3,522	$	962	$	1,026

(a) Revenue consists of net financing revenue and total other revenue as presented in our Condensed Consolidated Financial Statements.

(b) Gain (loss) realized on sale of discontinued operations are allocated to the geographic area in which the business operated.

(c) Our foreign operations as of September 30, 2016, and September 30, 2015, consist of our ongoing Insurance operations in Canada and our remaining international entities in wind-down.

(d) Amounts include eliminations between our domestic and foreign operations.

XML

Parent and Guarantor Consolidating Financial Statements (Tables)

9 Months Ended

Sep. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Condensed Income Statement [Table Text Block]

Condensed Consolidating Statements of Comprehensive Income

Three months ended September 30, 2016 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(15	)	$	—		$	1,322		$	—		$	1,307
Interest and fees on finance receivables and loans — intercompany	2			—			2			(4		)	—
Interest and dividends on investment securities	—			—			102			(1		)	101
Interest on cash and cash equivalents	1			—			2			—			3
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	4			—			645			—			649
Total financing revenue and other interest income	(8		)	—			2,075			(7		)	2,060
Interest expense
Interest on deposits	2			—			210			—			212
Interest on short-term borrowings	10			—			4			—			14
Interest on long-term debt	289			—			141			—			430
Interest on intercompany debt	5			—			2			(7		)	—
Total interest expense	306			—			357			(7		)	656
Depreciation expense on operating lease assets	3			—			405			—			408
Net financing (loss) revenue	(317		)	—			1,313			—			996
Cash dividends from subsidiaries
Nonbank subsidiaries	170			—			—			(170		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			238			—			238
(Loss) gain on mortgage and automotive loans, net	(7		)	—			7			—			—
Other gain on investments, net	—			—			52			—			52
Other income, net of losses	298			—			231			(431		)	98
Total other revenue	291			—			528			(431		)	388
Total net revenue	144			—			1,841			(601		)	1,384
Provision for loan losses	147			—			111			—			258
Noninterest expense
Compensation and benefits expense	143			—			105			—			248
Insurance losses and loss adjustment expenses	—			—			69			—			69
Other operating expenses	307			—			541			(430		)	418
Total noninterest expense	450			—			715			(430		)	735
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income of subsidiaries	(453		)	—			1,015			(171		)	391
Income tax (benefit) expense from continuing operations	(88		)	—			218			—			130
Net (loss) income from continuing operations	(365		)	—			797			(171		)	261
Loss from discontinued operations, net of tax	(47		)	—			(5		)	—			(52		)
Undistributed income of subsidiaries
Bank subsidiary	325			325			—			(650		)	—
Nonbank subsidiaries	296			—			—			(296		)	—
Net income	209			325			792			(1,117		)	209
Other comprehensive loss, net of tax	(4		)	(3		)	(9		)	12			(4		)
Comprehensive income	$	205		$	322		$	783		$	(1,105	)	$	205

Three months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(33	)	$	—		$	1,199		$	—		$	1,166
Interest and fees on finance receivables and loans — intercompany	3			—			1			(4		)	—
Interest on loans held-for-sale	—			—			2			—			2
Interest and dividends on investment securities	—			—			102			—			102
Interest on cash and cash equivalents	—			—			2			—			2
Interest-bearing cash — intercompany	—			—			2			(2		)	—
Operating leases	1			—			829			—			830
Total financing revenue and other interest income	(29		)	—			2,137			(6		)	2,102
Interest expense
Interest on deposits	3			—			178			—			181
Interest on short-term borrowings	10			—			3			—			13
Interest on long-term debt	272			—			138			—			410
Interest on intercompany debt	3			—			3			(6		)	—
Total interest expense	288			—			322			(6		)	604
Depreciation expense on operating lease assets	1			—			527			—			528
Net financing (loss) revenue	(318		)	—			1,288			—			970
Cash dividends from subsidiaries
Nonbank subsidiaries	494			—			—			(494		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			236			—			236
Loss on mortgage and automotive loans, net	(1		)	—			(1		)	—			(2		)
Other gain on investments, net	—			—			6			—			6
Other income, net of losses	367			—			329			(604		)	92
Total other revenue	366			—			570			(604		)	332
Total net revenue	542			—			1,858			(1,098		)	1,302
Provision for loan losses	48			—			163			—			211
Noninterest expense
Compensation and benefits expense	138			—			212			(115		)	235
Insurance losses and loss adjustment expenses	—			—			61			—			61
Other operating expenses	315			—			552			(489		)	378
Total noninterest expense	453			—			825			(604		)	674
Income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	41			—			870			(494		)	417
Income tax (benefit) expense from continuing operations	(30		)	—			174			—			144
Net income from continuing operations	71			—			696			(494		)	273
Loss from discontinued operations, net of tax	(5		)	—			—			—			(5		)
Undistributed income (loss) income of subsidiaries
Bank subsidiary	254			254			—			(508		)	—
Nonbank subsidiaries	(52		)	(1		)	—			53			—
Net income	268			253			696			(949		)	268
Other comprehensive income, net of tax	61			65			55			(120		)	61
Comprehensive income	$	329		$	318		$	751		$	(1,069	)	$	329

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(82	)	$	—		$	3,889		$	—		$	3,807
Interest and fees on finance receivables and loans — intercompany	8			—			6			(14		)	—
Interest and dividends on investment securities	—			—			303			(1		)	302
Interest on cash and cash equivalents	4			—			6			—			10
Interest-bearing cash — intercompany	—			—			7			(7		)	—
Operating leases	14			—			2,105			—			2,119
Total financing revenue and other interest income	(56		)	—			6,316			(22		)	6,238
Interest expense
Interest on deposits	6			—			602			—			608
Interest on short-term borrowings	31			—			8			—			39
Interest on long-term debt	868			—			440			—			1,308
Interest on intercompany debt	14			—			8			(22		)	—
Total interest expense	919			—			1,058			(22		)	1,955
Depreciation expense on operating lease assets	11			—			1,341			—			1,352
Net financing (loss) revenue	(986		)	—			3,917			—			2,931
Cash dividends from subsidiaries
Nonbank subsidiaries	800			—			—			(800		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			704			—			704
(Loss) gain on mortgage and automotive loans, net	(11		)	—			15			—			4
Loss on extinguishment of debt	(2		)	—			(2		)	—			(4		)
Other gain on investments, net	—			—			145			—			145
Other income, net of losses	989			—			661			(1,361		)	289
Total other revenue	976			—			1,523			(1,361		)	1,138
Total net revenue	790			—			5,440			(2,161		)	4,069
Provision for loan losses	295			—			355			—			650
Noninterest expense
Compensation and benefits expense	430			—			312			—			742
Insurance losses and loss adjustment expenses	—			—			287			—			287
Other operating expenses	963			—			1,586			(1,360		)	1,189
Total noninterest expense	1,393			—			2,185			(1,360		)	2,218
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(898		)	—			2,900			(801		)	1,201
Income tax (benefit) expense from continuing operations	(196		)	(82		)	614			—			336
Net (loss) income from continuing operations	(702		)	82			2,286			(801		)	865
Loss from discontinued operations, net of tax	(39		)	—			(7		)	—			(46		)
Undistributed income (loss) of subsidiaries
Bank subsidiary	932			932			—			(1,864		)	—
Nonbank subsidiaries	628			(2		)	—			(626		)	—
Net income	819			1,012			2,279			(3,291		)	819
Other comprehensive income, net of tax	262			143			234			(377		)	262
Comprehensive income	$	1,081		$	1,155		$	2,513		$	(3,668	)	$	1,081

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Financing revenue and other interest income
Interest and fees on finance receivables and loans	$	(45	)	$	—		$	3,403		$	—		$	3,358
Interest and fees on finance receivables and loans — intercompany	15			—			22			(37		)	—
Interest on loans held-for-sale	—			—			40			—			40
Interest and dividends on investment securities	—			—			283			—			283
Interest on cash and cash equivalents	1			—			5			—			6
Interest-bearing cash — intercompany	—			—			6			(6		)	—
Operating leases	1			—			2,585			—			2,586
Total financing revenue and other interest income	(28		)	—			6,344			(43		)	6,273
Interest expense
Interest on deposits	8			—			522			—			530
Interest on short-term borrowings	30			—			6			—			36
Interest on long-term debt	856			—			402			—			1,258
Interest on intercompany debt	28			—			15			(43		)	—
Total interest expense	922			—			945			(43		)	1,824
Depreciation expense on operating lease assets	1			—			1,712			—			1,713
Net financing (loss) revenue	(951		)	—			3,687			—			2,736
Cash dividends from subsidiaries
Bank subsidiaries	525			525			—			(1,050		)	—
Nonbank subsidiaries	980			—			—			(980		)	—
Other revenue
Insurance premiums and service revenue earned	—			—			706			—			706
(Loss) gain on mortgage and automotive loans, net	(9		)	—			54			—			45
Loss on extinguishment of debt	(353		)	—			(1		)	—			(354		)
Other gain on investments, net	—			—			106			—			106
Other income, net of losses	1,045			—			1,019			(1,781		)	283
Total other revenue	683			—			1,884			(1,781		)	786
Total net revenue	1,237			525			5,571			(3,811		)	3,522
Provision for loan losses	111			—			356			—			467
Noninterest expense
Compensation and benefits expense	431			—			634			(339		)	726
Insurance losses and loss adjustment expenses	—			—			239			—			239
Other operating expenses	935			—			1,635			(1,442		)	1,128
Total noninterest expense	1,366			—			2,508			(1,781		)	2,093
(Loss) income from continuing operations before income tax (benefit) expense and undistributed income (loss) of subsidiaries	(240		)	525			2,707			(2,030		)	962
Income tax (benefit) expense from continuing operations	(231		)	—			572			—			341
Net (loss) income from continuing operations	(9		)	525			2,135			(2,030		)	621
Income from discontinued operations, net of tax	367			—			38			—			405
Undistributed income (loss) of subsidiaries
Bank subsidiary	302			302			—			(604		)	—
Nonbank subsidiaries	366			(1		)	—			(365		)	—
Net income	1,026			826			2,173			(2,999		)	1,026
Other comprehensive (loss) income, net of tax	(56		)	40			(64		)	24			(56		)
Comprehensive income	$	970		$	866		$	2,109		$	(2,975	)	$	970

Condensed Balance Sheet [Table Text Block]

Condensed Consolidating Balance Sheet

September 30, 2016($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	809		$	—	$	970		$	—		$	1,779
Interest-bearing	600			—		1,910			—			2,510
Interest-bearing — intercompany	—			—		779			(779		)	—
Total cash and cash equivalents	1,409			—		3,659			(779		)	4,289
Available-for-sale securities	—			—		18,030			(329		)	17,701
Held-to-maturity securities	—			—		649			—			649
Loans held-for-sale, net	—			—		56			—			56
Finance receivables and loans, net
Finance receivables and loans, net	5,501			—		109,458			—			114,959
Intercompany loans to
Bank subsidiary	300			—		—			(300		)	—
Nonbank subsidiaries	1,693			—		600			(2,293		)	—
Allowance for loan losses	(125		)	—		(1,009		)	—			(1,134		)
Total finance receivables and loans, net	7,369			—		109,049			(2,593		)	113,825
Investment in operating leases, net	50			—		12,639			—			12,689
Intercompany receivables from
Bank subsidiary	343			—		—			(343		)	—
Nonbank subsidiaries	90			—		127			(217		)	—
Investment in subsidiaries
Bank subsidiary	17,582			17,582		—			(35,164		)	—
Nonbank subsidiaries	11,378			1		—			(11,379		)	—
Premiums receivable and other insurance assets	—			—		1,906			(25		)	1,881
Other assets	4,434			—		4,681			(2,808		)	6,307
Total assets	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	101		$	—		$	101
Interest-bearing	193			—		75,450			—			75,643
Total deposit liabilities	193			—		75,551			—			75,744
Short-term borrowings	3,525			—		2,909			—			6,434
Long-term debt	22,264			—		34,572			—			56,836
Intercompany debt to
Bank subsidiary	330			—		—			(330		)	—
Nonbank subsidiaries	1,379			—		1,993			(3,372		)	—
Intercompany payables to
Bank subsidiary	436			—		—			(436		)	—
Nonbank subsidiaries	179			—		(29		)	(150		)	—
Interest payable	247			—		215			—			462
Unearned insurance premiums and service revenue	—			—		2,493			—			2,493
Accrued expenses and other liabilities	472			—		4,133			(2,807		)	1,798
Total liabilities	29,025			—		121,837			(7,095		)	143,767
Total equity	13,630			17,583		28,959			(46,542		)	13,630
Total liabilities and equity	$	42,655		$	17,583	$	150,796		$	(53,637	)	$	157,397

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

December 31, 2015 ($ in millions)	Parent (a)			Guarantors		Nonguarantors (a)			Consolidating adjustments			Ally consolidated
Assets
Cash and cash equivalents
Noninterest-bearing	$	1,234		$	—	$	914		$	—		$	2,148
Interest-bearing	401			—		3,831			—			4,232
Interest-bearing — intercompany	—			—		850			(850		)	—
Total cash and cash equivalents	1,635			—		5,595			(850		)	6,380
Available-for-sale securities	—			—		17,157			—			17,157
Loans held-for-sale, net	—			—		105			—			105
Finance receivables and loans, net
Finance receivables and loans, net	2,636			—		108,964			—			111,600
Intercompany loans to
Bank subsidiary	600			—		—			(600		)	—
Nonbank subsidiaries	3,277			—		559			(3,836		)	—
Allowance for loan losses	(72		)	—		(982		)	—			(1,054		)
Total finance receivables and loans, net	6,441			—		108,541			(4,436		)	110,546
Investment in operating leases, net	81			—		16,190			—			16,271
Intercompany receivables from
Bank subsidiary	186			—		—			(186		)	—
Nonbank subsidiaries	259			—		282			(541		)	—
Investment in subsidiaries
Bank subsidiary	16,496			16,496		—			(32,992		)	—
Nonbank subsidiaries	10,902			11		—			(10,913		)	—
Premiums receivable and other insurance assets	—			—		1,827			(26		)	1,801
Other assets	4,785			—		4,488			(2,952		)	6,321
Total assets	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581
Liabilities
Deposit liabilities
Noninterest-bearing	$	—		$	—	$	89		$	—		$	89
Interest-bearing	229			—		66,160			—			66,389
Total deposit liabilities	229			—		66,249			—			66,478
Short-term borrowings	3,453			—		4,648			—			8,101
Long-term debt	21,048			—		45,186			—			66,234
Intercompany debt to
Nonbank subsidiaries	1,409			—		3,877			(5,286		)	—
Intercompany payables to
Bank subsidiary	142			—		—			(142		)	—
Nonbank subsidiaries	420			—		191			(611		)	—
Interest payable	258			—		92			—			350
Unearned insurance premiums and service revenue	—			—		2,434			—			2,434
Accrued expenses and other liabilities	387			82		4,028			(2,952		)	1,545
Total liabilities	27,346			82		126,705			(8,991		)	145,142
Total equity	13,439			16,425		27,480			(43,905		)	13,439
Total liabilities and equity	$	40,785		$	16,507	$	154,185		$	(52,896	)	$	158,581

(a) Amounts presented are based upon the legal transfer of the underlying assets to VIEs in order to reflect legal ownership.

Condensed Cash Flow Statement [Table Text Block]

Condensed Consolidating Statement of Cash Flows

Nine months ended September 30, 2016($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	709		$	—		$	3,782		$	(902	)	$	3,589
Investing activities
Purchases of available-for-sale securities	—			—			(11,027		)	—			(11,027		)
Proceeds from sales of available-for-sale securities	—			—			8,546			—			8,546
Proceeds from maturities and repayments of available-for-sale securities	—			—			2,411			—			2,411
Purchases of held-to-maturity securities	—			—			(650		)	—			(650		)
Net decrease (increase) in finance receivables and loans	934			—			(9,242		)	—			(8,308		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			4,221			—			4,221
Net change in loans — intercompany	1,788			—			(41		)	(1,747		)	—
Purchases of operating lease assets	—			—			(2,360		)	—			(2,360		)
Disposals of operating lease assets	16			—			4,615			—			4,631
Acquisitions, net of cash acquired	(309		)	—			—			—			(309		)
Capital contributions to subsidiaries	(3,112		)	—			—			3,112			—
Returns of contributed capital	2,168			8			—			(2,176		)	—
Net change in restricted cash	(136		)	—			758			—			622
Net change in nonmarketable equity investments	—			—			(401		)	—			(401		)
Other, net	(156		)	—			(103		)	102			(157		)
Net cash provided by (used in) investing activities	1,193			8			(3,273		)	(709		)	(2,781		)
Financing activities
Net change in short-term borrowings — third party	72			—			(1,745		)	—			(1,673		)
Net (decrease) increase in deposits	(36		)	—			9,276			—			9,240
Proceeds from issuance of long-term debt — third party	1,084			—			10,145			—			11,229
Repayments of long-term debt — third party	(2,279		)	—			(18,479		)	—			(20,758		)
Net change in debt — intercompany	(30		)	—			(1,788		)	1,818			—
Redemption of preferred stock	(696		)	—			—			—			(696		)
Repurchase of common stock	(173		)	—			—			—			(173		)
Dividends paid — third party	(70		)	—			—			—			(70		)
Dividends paid and returns of contributed capital — intercompany	—			(8		)	(2,968		)	2,976			—
Capital contributions from parent	—			—			3,112			(3,112		)	—
Net cash used in financing activities	(2,128		)	(8		)	(2,447		)	1,682			(2,901		)
Effect of exchange-rate changes on cash and cash equivalents	—			—			2			—			2
Net decrease in cash and cash equivalents	(226		)	—			(1,936		)	71			(2,091		)
Cash and cash equivalents at beginning of year	1,635			—			5,595			(850		)	6,380
Cash and cash equivalents at September 30,	$	1,409		$	—		$	3,659		$	(779	)	$	4,289

Nine months ended September 30, 2015 ($ in millions)	Parent			Guarantors			Nonguarantors			Consolidating adjustments			Ally consolidated
Operating activities
Net cash provided by operating activities	$	67		$	525		$	5,408		$	(2,030	)	$	3,970
Investing activities
Purchases of available-for-sale securities	—			—			(10,011		)	—			(10,011		)
Proceeds from sales of available-for-sale securities	—			—			4,408			—			4,408
Proceeds from maturities and repayments of available-for -sale securities	—			—			3,141			—			3,141
Net decrease (increase) in finance receivables and loans	398			—			(9,573		)	—			(9,175		)
Proceeds from sales of finance receivables and loans originated as held-for-investment	—			—			2,665			—			2,665
Net change in loans — intercompany	2,392			—			1,225			(3,617		)	—
Purchases of operating lease assets	(94		)	—			(3,329		)	—			(3,423		)
Disposals of operating lease assets	—			—			3,855			—			3,855
Capital contributions to subsidiaries	(228		)	(1		)	1			228			—
Returns of contributed capital	881			—			—			(881		)	—
Proceeds from sale of business unit, net	1,049			—			—			—			1,049
Net change in restricted cash	(12		)	—			501			—			489
Net change in nonmarketable equity investments	—			—			(42		)	—			(42		)
Other, net	(29		)	—			54			—			25
Net cash provided by (used in) investing activities	4,357			(1		)	(7,105		)	(4,270		)	(7,019		)
Financing activities
Net change in short-term borrowings — third party	120			—			(1,812		)	—			(1,692		)
Net (decrease) increase in deposits	(72		)	—			5,869			—			5,797
Proceeds from issuance of long-term debt — third party	4,037			—			19,829			—			23,866
Repayments of long-term debt — third party	(5,866		)	—			(17,588		)	—			(23,454		)
Net change in debt — intercompany	(1,117		)	—			(2,393		)	3,510			—
Repurchase and redemption of preferred stock	(442		)	—			—			—			(442		)
Repurchase of common stock	(16		)	—			—			—			(16		)
Dividends paid — third party	(1,356		)	—			—			—			(1,356		)
Dividends paid and returns of contributed capital — intercompany	—			(525		)	(2,386		)	2,911			—
Capital contributions from parent	—			1			227			(228		)	—
Net cash (used in) provided by financing activities	(4,712		)	(524		)	1,746			6,193			2,703
Effect of exchange-rate changes on cash and cash equivalents	—			—			(3		)	—			(3		)
Net (decrease) increase in cash and cash equivalents	(288		)	—			46			(107		)	(349		)
Cash and cash equivalents at beginning of year	2,286			—			3,905			(615		)	5,576
Cash and cash equivalents at September 30,	$	1,998		$	—		$	3,951		$	(722	)	$	5,227

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Acquisition of TradeKing Acquisition of TradeKing (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Aug. 01, 2016	Jun. 01, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Amortization of Intangible Assets	$ 3
Payments to Acquire Businesses, Gross		$ 28	$ 298
Goodwill	240			$ 27
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			82
Cash and Cash Equivalents [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			50
Other Assets [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			14
Deferred Tax Asset [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			4
Employee compensation and benefits [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			40
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			(41)
Other Liabilities [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			(4)
Corporate and Other [Member]
Business Acquisition [Line Items]
Goodwill	193		$ 193	0
Automotive Finance Operations [Member]
Business Acquisition [Line Items]
Goodwill	$ 20			$ 0

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Discontinued Operations (Selected Income Statement Information for Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Automotive Finance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sold Interest in Joint Venture		40.00%		40.00%
Equity Method Investment, Realized Gain (Loss) on Disposal				$ 400
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	$ (5)	$ (1)	$ (5)	452
Discontinued Operation, Tax Effect of Discontinued Operation	2	3	2	68
Other Segments [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(41)	(1)	(39)	19
Discontinued Operation, Tax Effect of Discontinued Operation	$ 4	$ 0	$ 0	$ (2)

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Other Income, Net of Losses (Schedule of Other Income, Net of Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Nonoperating Income (Expense) [Abstract]
Remarketing Fees	$ 26	$ 25	$ 79	$ 78
Fees and Commissions, Other	25	23	72	66
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets	18	12	49	32
Income (Loss) from Equity Method Investments	3	11	14	48
Other Income	26	21	75	59
Noninterest Income, Other Operating Income	$ 98	$ 92	$ 289	$ 283

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Other Operating Expenses (Schedule Of Other Operating Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Expenses [Abstract]
Insurance Commissions	$ 99	$ 95	$ 290	$ 283
Communications and Information Technology	70	65	203	198
Lease And Loan Administration	34	31	100	92
Marketing and Advertising Expense	27	26	75	80
Professional Fees	25	23	75	68
Vehicle remarketing and repossession	24	20	70	56
Regulatory and licensing fees	26	18	68	59
Depreciation, Nonproduction	19	20	61	62
Occupancy, Net	13	13	38	38
Taxes, Miscellaneous	10	11	27	26
Other Cost and Expense, Operating	71	56	182	166
Other Noninterest Expense	$ 418	$ 378	$ 1,189	$ 1,128

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Investment Securities (Investment Table) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 17,535	$ 17,350
Available-for-sale Securities, Gross Unrealized Gains	268	96
Available-for-sale Securities, Gross Unrealized Losses	(102)	(289)
Available-for-sale securities	17,701	17,157
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	649	0
Held-to-maturity Securities, Fair Value	658	0
Total agency backed bonds	9,772	7,544
Deposit Assets	15	14
Pledged Assets Separately Reported, Securities Pledged for Federal Home Loan Bank, at Fair Value	635	2,506
Financial Instruments Owned and Pledged as Collateral, Amount Eligible to be Repledged by Counterparty	635	745
Cash Equivalents, at Carrying Value	800	1,000
Held-to-maturity Securities [Member]
Schedule of Investments [Line Items]
Unrealized Gain on Securities	10	0
Unrealized Gain (Loss) on Investments	(1)	0
Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	16,904	16,542
Available-for-sale Debt Securities Gross Unrealized Gain	266	93
Available-for-sale Debt Securities, Gross Unrealized Loss	(39)	(195)
Available-for-sale Securities, Debt Securities	17,131	16,440
US Treasury and Government [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	316	1,760
Available-for-sale Debt Securities Gross Unrealized Gain	5	0
Available-for-sale Debt Securities, Gross Unrealized Loss	0	(19)
Available-for-sale Securities, Debt Securities	321	1,741
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	740	693
Available-for-sale Debt Securities Gross Unrealized Gain	26	24
Available-for-sale Debt Securities, Gross Unrealized Loss	(3)	(1)
Available-for-sale Securities, Debt Securities	763	716
Foreign Government Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	170	169
Available-for-sale Debt Securities Gross Unrealized Gain	10	8
Available-for-sale Debt Securities, Gross Unrealized Loss	0	0
Available-for-sale Securities, Debt Securities	180	177
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	11,992	10,459
Available-for-sale Debt Securities Gross Unrealized Gain	180	52
Available-for-sale Debt Securities, Gross Unrealized Loss	(29)	(145)
Available-for-sale Securities, Debt Securities	12,143	10,366
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	526	486
Available-for-sale Debt Securities Gross Unrealized Gain	1	0
Available-for-sale Debt Securities, Gross Unrealized Loss	(3)	(5)
Available-for-sale Securities, Debt Securities	524	481
Asset-backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,563	1,762
Available-for-sale Debt Securities Gross Unrealized Gain	8	1
Available-for-sale Debt Securities, Gross Unrealized Loss	(1)	(8)
Available-for-sale Securities, Debt Securities	1,570	1,755
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,597	1,213
Available-for-sale Debt Securities Gross Unrealized Gain	36	8
Available-for-sale Debt Securities, Gross Unrealized Loss	(3)	(17)
Available-for-sale Securities, Debt Securities	1,630	1,204
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	631	808
Available-for-sale Equity Securities, Gross Unrealized Gain	2	3
Available-for-sale Equity Securities, Gross Unrealized Loss	(63)	(94)
Available-for-sale Securities, Equity Securities	$ 570	$ 717

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Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment	$ 649	$ 0
Held-to-Maturity Debt Securities, Yield	3.00%
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	$ 0
Held-to-Maturity Debt Securities, Due in One Year or Less, Yield	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	$ 0
Held-to-Maturity Debt Securities, Due After One Year Through Five Years, Yield	0.00%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	$ 0
Held-to-Maturity Debt Securities, Due After Five Years Through Ten Years, Yield	0.00%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	$ 649
Held-to-Maturity Securities, Due After Ten Years, Yield	3.00%
Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 17,131	$ 16,440
Available-for-sale debt securities, Yield	2.90%	2.70%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 16,904	$ 16,542
Available-for-sale debt securities, Due in one year or less, Amount	$ 167	$ 157
Available-for-sale debt securities, Due in one year or less, Yield	2.40%	2.00%
Amortized cost of available-for-sale debt securities, Due in one year or less, Amount	$ 168	$ 156
Available-for-sale debt securities, Due after one year through five years, Amount	$ 2,115	$ 2,397
Available-for-sale debt securities, Due after one year through five years, Yield	2.60%	2.10%
Amortized cost of available-for-sale debt securities, Due after one year through five years, Amount	$ 2,093	$ 2,404
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 1,487	$ 2,424
Available-for-sale debt securities, Due after five years through ten years, Yield	2.80%	2.50%
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	$ 1,449	$ 2,436
Available-for-sale debt securities, Due after ten years, Amount	$ 13,362	$ 11,462
Available-for-sale debt securities, Due after ten years, Yield	2.90%	2.90%
Amortized cost of available-for-sale debt securities, Due after ten years, Amount	$ 13,194	$ 11,546
US Treasury and Government [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 321	$ 1,741
Available-for-sale debt securities, Yield	1.70%	1.80%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 316	$ 1,760
Available-for-sale debt securities, Due in one year or less, Amount	$ 2	$ 6
Available-for-sale debt securities, Due in one year or less, Yield	4.30%	5.10%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 10	$ 510
Available-for-sale debt securities, Due after one year through five years, Yield	1.70%	1.20%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 309	$ 1,225
Available-for-sale debt securities, Due after five years through ten years, Yield	1.70%	2.10%
Available-for-sale debt securities, Due after ten years, Amount	$ 0	$ 0
Available-for-sale debt securities, Due after ten years, Yield	0.00%	0.00%
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 763	$ 716
Available-for-sale debt securities, Yield	3.10%	3.20%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 740	$ 693
Available-for-sale debt securities, Due in one year or less, Amount	$ 115	$ 86
Available-for-sale debt securities, Due in one year or less, Yield	2.40%	1.30%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 24	$ 37
Available-for-sale debt securities, Due after one year through five years, Yield	2.40%	2.20%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 143	$ 141
Available-for-sale debt securities, Due after five years through ten years, Yield	3.00%	2.80%
Available-for-sale debt securities, Due after ten years, Amount	$ 481	$ 452
Available-for-sale debt securities, Due after ten years, Yield	3.40%	3.70%
Foreign Government Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 180	$ 177
Available-for-sale debt securities, Yield	2.60%	2.60%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 170	$ 169
Available-for-sale debt securities, Due in one year or less, Amount	$ 0	$ 9
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	1.90%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 73	$ 77
Available-for-sale debt securities, Due after one year through five years, Yield	2.90%	2.80%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 107	$ 91
Available-for-sale debt securities, Due after five years through ten years, Yield	2.50%	2.60%
Available-for-sale debt securities, Due after ten years, Amount	$ 0	$ 0
Available-for-sale debt securities, Due after ten years, Yield	0.00%	0.00%
Residential Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 12,143	$ 10,366
Available-for-sale debt securities, Yield	2.90%	2.90%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 11,992	$ 10,459
Available-for-sale debt securities, Due in one year or less, Amount	$ 0	$ 0
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	0.00%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 0	$ 33
Available-for-sale debt securities, Due after one year through five years, Yield	0.00%	2.10%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 34	$ 36
Available-for-sale debt securities, Due after five years through ten years, Yield	2.50%	2.50%
Available-for-sale debt securities, Due after ten years, Amount	$ 12,109	$ 10,297
Available-for-sale debt securities, Due after ten years, Yield	2.90%	2.90%
Commercial Mortgage Backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 524	$ 481
Available-for-sale debt securities, Yield	2.40%	2.00%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 526	$ 486
Available-for-sale debt securities, Due in one year or less, Amount	$ 0	$ 0
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	0.00%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 0	$ 0
Available-for-sale debt securities, Due after one year through five years, Yield	0.00%	0.00%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 3	$ 3
Available-for-sale debt securities, Due after five years through ten years, Yield	2.80%	2.70%
Available-for-sale debt securities, Due after ten years, Amount	$ 521	$ 478
Available-for-sale debt securities, Due after ten years, Yield	2.40%	2.00%
Asset-backed Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 1,570	$ 1,755
Available-for-sale debt securities, Yield	2.70%	2.30%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 1,563	$ 1,762
Available-for-sale debt securities, Due in one year or less, Amount	$ 0	$ 6
Available-for-sale debt securities, Due in one year or less, Yield	0.00%	1.40%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 1,059	$ 1,027
Available-for-sale debt securities, Due after one year through five years, Yield	2.60%	2.10%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 300	$ 518
Available-for-sale debt securities, Due after five years through ten years, Yield	3.30%	2.60%
Available-for-sale debt securities, Due after ten years, Amount	$ 211	$ 204
Available-for-sale debt securities, Due after ten years, Yield	2.50%	2.20%
Corporate Debt Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Securities	$ 1,630	$ 1,204
Available-for-sale debt securities, Yield	2.90%	2.90%
Available-for-sale Debt Securities, Amortized Cost Basis	$ 1,597	$ 1,213
Available-for-sale debt securities, Due in one year or less, Amount	$ 50	$ 50
Available-for-sale debt securities, Due in one year or less, Yield	2.30%	3.00%
Available-for-sale debt securities, Due after one year through five years, Amount	$ 949	$ 713
Available-for-sale debt securities, Due after one year through five years, Yield	2.60%	2.50%
Available-for-sale debt securities, Due after five years through ten years, Amount	$ 591	$ 410
Available-for-sale debt securities, Due after five years through ten years, Yield	3.20%	3.40%
Available-for-sale debt securities, Due after ten years, Amount	$ 40	$ 31
Available-for-sale debt securities, Due after ten years, Yield	4.70%	5.40%

XML

Investment Securities (Investment Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Taxable interest	$ 93	$ 90	$ 276	$ 252
Taxable dividends	4	7	13	18
Interest and dividends exempt from U.S. federal income tax	4	5	13	13
Interest and Dividend Income, Securities, Operating, Available-for-sale	$ 101	$ 102	$ 302	$ 283

XML

Investment Securities (Schedule Of Realized Gain (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Available-for-sale Securities, Gross Realized Gains	$ 52	$ 28	$ 146	$ 134
Available-for-sale Securities, Gross Realized Losses	0	(11)	(1)	(14)
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	0	(11)	0	(14)
Available-for-sale Securities, Gross Realized Gain (Loss)	$ 52	$ 6	$ 145	$ 106

XML

Investment Securities (Schedule of Unrealized Loss on Investments) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	$ 1,890	$ 8,511
Available-for-sale Securities, Unrealized Loss Less than 12 months	(20)	(139)
Available-for-sale Securities, Fair value 12 months or longer	2,316	2,798
Available-for-sale Securities, Unrealized Loss 12 months or longer	(82)	(150)
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	1,742	7,977
Available-for-sale Securities, Unrealized Loss Less than 12 months	(8)	(85)
Available-for-sale Securities, Fair value 12 months or longer	1,987	2,702
Available-for-sale Securities, Unrealized Loss 12 months or longer	(31)	(110)
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	0	1,553
Available-for-sale Securities, Unrealized Loss Less than 12 months	0	(17)
Available-for-sale Securities, Fair value 12 months or longer	0	173
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	(2)
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	254	179
Available-for-sale Securities, Unrealized Loss Less than 12 months	(2)	(1)
Available-for-sale Securities, Fair value 12 months or longer	11	0
Available-for-sale Securities, Unrealized Loss 12 months or longer	(1)	0
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	0	2
Available-for-sale Securities, Unrealized Loss Less than 12 months	0	0
Available-for-sale Securities, Fair value 12 months or longer	0	0
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	0
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	948	4,096
Available-for-sale Securities, Unrealized Loss Less than 12 months	(4)	(43)
Available-for-sale Securities, Fair value 12 months or longer	1,786	2,453
Available-for-sale Securities, Unrealized Loss 12 months or longer	(28)	(107)
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	406	1,402
Available-for-sale Securities, Unrealized Loss Less than 12 months	(1)	(8)
Available-for-sale Securities, Fair value 12 months or longer	140	64
Available-for-sale Securities, Unrealized Loss 12 months or longer	0	0
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	134	745
Available-for-sale Securities, Unrealized Loss Less than 12 months	(1)	(16)
Available-for-sale Securities, Fair value 12 months or longer	50	12
Available-for-sale Securities, Unrealized Loss 12 months or longer	(2)	(1)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair value Less than 12 months	148	534
Available-for-sale Securities, Unrealized Loss Less than 12 months	(12)	(54)
Available-for-sale Securities, Fair value 12 months or longer	329	96
Available-for-sale Securities, Unrealized Loss 12 months or longer	$ (51)	$ (40)

XML

Finance Receivables and Loans, Net (Schedule of Accounts, Notes, Loans and Financing Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative, Amount of Hedged Item	$ 481	$ 331
Loans and Leases Receivable, Gross	114,959	111,600	$ 107,990
Loans and Finance Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	310	110
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	75,673	74,065
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	64,816	64,292	63,610
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Derivative, Amount of Hedged Item	66	66
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	10,857	9,773	9,769
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	7,931	6,413
Held For Investment Mortgage Finance Receivables Interest Only Mortgage Loans	$ 32	44
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	0.00%
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | One year and three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	3.00%
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Two years and three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	0.00%
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Three years three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	39.00%
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Four years and three months, or greater [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	39.00%
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 2,926	3,360
Held For Investment Mortgage Finance Receivables Interest Only Mortgage Loans	$ 771	941
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	8.00%
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | One year and three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	23.00%
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Two years and three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	2.00%
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Three years three months, or less [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	0.00%
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Four years and three months, or greater [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest-only mortgage loan portfolio principal amortization	1.00%
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 39,286	37,535	$ 34,611
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	32,260	31,469
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	3,250	2,640
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 3,776	$ 3,426

XML

Finance Receivables and Loans, Net (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	$ 1,089	$ 974	$ 1,054	$ 977
Allowance for Loan and Lease Losses, Write-offs	(303)	(231)	(803)	(621)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	90	70	259	210
Allowance for Loan and Lease Losses Write-offs, Net	(213)	(161)	(544)	(411)
Allowance for Loan and Lease Losses, Provision for Loss, Net	(258)	(211)	(650)	(467)
Allowance for Loan and Lease Losses, Adjustments, Net		6	26	15
Loans and Leases Receivable, Allowance, Ending Balance	1,134	1,018	1,134	1,018
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	84	89	84	89
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,050	929	1,050	929
Loans and Leases Receivable, Gross	114,959	107,990	114,959	107,990	$ 111,600
Financing Receivable, Individually Evaluated for Impairment	711	628	711	628
Financing Receivable, Collectively Evaluated for Impairment	114,248	107,362	114,248	107,362
Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Loans and Leases Receivable, Gross	0	0	0	0
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	862	767	834	685
Allowance for Loan and Lease Losses, Write-offs	(293)	(220)	(773)	(579)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	74	64	233	195
Allowance for Loan and Lease Losses Write-offs, Net	(219)	(156)	(540)	(384)
Allowance for Loan and Lease Losses, Provision for Loss, Net	(269)	(200)	(644)	(510)
Allowance for Loan and Lease Losses, Adjustments, Net		7	26	7
Loans and Leases Receivable, Allowance, Ending Balance	912	804	912	804
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	24	22	24	22
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	888	782	888	782
Loans and Leases Receivable, Gross	64,816	63,610	64,816	63,610	64,292
Financing Receivable, Individually Evaluated for Impairment	349	285	349	285
Financing Receivable, Collectively Evaluated for Impairment	64,467	63,325	64,467	63,325
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Loans and Leases Receivable, Gross	0	0	0	0
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	109	119	114	152
Allowance for Loan and Lease Losses, Write-offs	(10)	(10)	(29)	(41)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	16	4	25	12
Allowance for Loan and Lease Losses Write-offs, Net	6	(6)	(4)	(29)
Allowance for Loan and Lease Losses, Provision for Loss, Net	15	(6)	10	(4)
Allowance for Loan and Lease Losses, Adjustments, Net		0	0	8
Loans and Leases Receivable, Allowance, Ending Balance	100	119	100	119
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	35	48	35	48
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	65	71	65	71
Loans and Leases Receivable, Gross	10,857	9,769	10,857	9,769	9,773
Financing Receivable, Individually Evaluated for Impairment	251	268	251	268
Financing Receivable, Collectively Evaluated for Impairment	10,606	9,501	10,606	9,501
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Loans and Leases Receivable, Gross	0	0	0	0
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Allowance for Loan and Lease Losses [Roll Forward]
Loans and Leases Receivable, Allowance, Beginning Balance	118	88	106	140
Allowance for Loan and Lease Losses, Write-offs	0	(1)	(1)	(1)
Allowance for Loan and Lease Loss, Recovery of Bad Debts	0	2	1	3
Allowance for Loan and Lease Losses Write-offs, Net	0	1	0	2
Allowance for Loan and Lease Losses, Provision for Loss, Net	(4)	(5)	(16)	47
Allowance for Loan and Lease Losses, Adjustments, Net		(1)	0	0
Loans and Leases Receivable, Allowance, Ending Balance	122	95	122	95
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	25	19	25	19
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	97	76	97	76
Loans and Leases Receivable, Gross	39,286	34,611	39,286	34,611	$ 37,535
Financing Receivable, Individually Evaluated for Impairment	111	75	111	75
Financing Receivable, Collectively Evaluated for Impairment	39,175	34,536	39,175	34,536
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Financing Receivable, Allowance for Credit Losses	0	0	0	0
Loans and Leases Receivable, Gross	$ 0	$ 0	$ 0	$ 0

XML

Finance Receivables and Loans, Net (Schedule of Sales of Financing Receivables and Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	$ 63	$ 707	$ 4,256	$ 780
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	57	704	4,216	704
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	6	2	12	75
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales and Transfers	$ 0	$ 1	$ 28	$ 1

XML

Finance Receivables and Loans, Net Finance Receivables and Loans, Net (Schedule of Purchases of Financing Receivables and Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	$ 467	$ 1,262	$ 2,855	$ 3,912
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	0	272	0	272
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Purchases	$ 467	$ 990	$ 2,855	$ 3,640

XML

Finance Receivables and Loans, Net (Past Due Financing Receivables and Loans) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 2,380	$ 2,414
Current	112,579	109,186
Loans and Leases Receivable, Gross	114,959	111,600	$ 107,990
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,380	2,414
Current	73,293	71,651
Loans and Leases Receivable, Gross	75,673	74,065
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,187	2,209
Current	62,629	62,083
Loans and Leases Receivable, Gross	64,816	64,292	63,610
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	193	205
Current	10,664	9,568
Loans and Leases Receivable, Gross	10,857	9,773	9,769
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	72	59
Current	7,859	6,354
Loans and Leases Receivable, Gross	7,931	6,413
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	121	146
Current	2,805	3,214
Loans and Leases Receivable, Gross	2,926	3,360
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	39,286	37,535
Loans and Leases Receivable, Gross	39,286	37,535	$ 34,611
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	32,260	31,469
Loans and Leases Receivable, Gross	32,260	31,469
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	3,250	2,640
Loans and Leases Receivable, Gross	3,250	2,640
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	3,776	3,426
Loans and Leases Receivable, Gross	3,776	3,426
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,697	1,715
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,697	1,715
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,584	1,618
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	113	97
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	64	44
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	49	53
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	359	394
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	359	394
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	343	369
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	16	25
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4	5
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	12	20
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	324	305
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	324	305
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	260	222
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	64	83
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	4	10
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	60	73
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	$ 0

XML

Finance Receivables and Loans, Net (Schedule of Financing Receivables, Non Accrual Status) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 114,959	$ 111,600	$ 107,990
Finance receivables and loans on nonaccrual status	753	680
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	75,673	74,065
Finance receivables and loans on nonaccrual status	642	603
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	64,816	64,292	63,610
Finance receivables and loans on nonaccrual status	542	475
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	10,857	9,773	9,769
Finance receivables and loans on nonaccrual status	100	128
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	7,931	6,413
Finance receivables and loans on nonaccrual status	9	15
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	2,926	3,360
Finance receivables and loans on nonaccrual status	91	113
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	39,286	37,535	$ 34,611
Finance receivables and loans on nonaccrual status	111	77
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	32,260	31,469
Finance receivables and loans on nonaccrual status	44	25
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	3,250	2,640
Finance receivables and loans on nonaccrual status	62	44
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	3,776	3,426
Finance receivables and loans on nonaccrual status	$ 5	$ 8

XML

Finance Receivables and Loans, Net (Financing Receivable Credit Quality Indicators - Performing and Nonperforming) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	$ 114,959	$ 111,600	$ 107,990
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	75,673	74,065
Consumer Portfolio Segment [Member] | Consumer Loan [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	75,031	73,462
Consumer Portfolio Segment [Member] | Consumer Loan [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	642	603
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	64,816	64,292	63,610
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	64,274	63,817
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	542	475
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	10,857	9,773	$ 9,769
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	10,757	9,645
Consumer Portfolio Segment [Member] | Residential Mortgage [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	100	128
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	7,931	6,413
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	7,922	6,398
Consumer Portfolio Segment [Member] | Mortgage Finance [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	9	15
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	2,926	3,360
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	2,835	3,247
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	$ 91	$ 113

XML

Finance Receivables and Loans, Net (Schedule of Pass And Criticized Credit Quality Indicators of Finance Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	$ 114,959	$ 111,600	$ 107,990
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	39,286	37,535	$ 34,611
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	36,529	35,000
Commercial Portfolio Segment [Member] | Commercial Loan [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	2,757	2,535
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	32,260	31,469
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	30,355	29,613
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	1,905	1,856
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	3,250	2,640
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	2,574	2,122
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	676	518
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	3,776	3,426
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	3,600	3,265
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross	$ 176	$ 161

XML

Finance Receivables and Loans, Net (Impaired Financing Receivables) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	$ 765	$ 661
Carrying value before allowance	711	658
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	194	69
Impaired Financing Receivable, with Related Allowance, Recorded Investment	517	589
Impaired Financing Receivable, Related Allowance	84	86
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	640	584
Carrying value before allowance	600	581
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	183	64
Impaired Financing Receivable, with Related Allowance, Recorded Investment	417	517
Impaired Financing Receivable, Related Allowance	59	66
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	385	315
Carrying value before allowance	349	315
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	124	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	225	315
Impaired Financing Receivable, Related Allowance	24	22
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	255	269
Carrying value before allowance	251	266
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	59	64
Impaired Financing Receivable, with Related Allowance, Recorded Investment	192	202
Impaired Financing Receivable, Related Allowance	35	44
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	7	9
Carrying value before allowance	7	9
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	3	5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4	4
Impaired Financing Receivable, Related Allowance	0	1
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	248	260
Carrying value before allowance	244	257
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	56	59
Impaired Financing Receivable, with Related Allowance, Recorded Investment	188	198
Impaired Financing Receivable, Related Allowance	35	43
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	125	77
Carrying value before allowance	111	77
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	11	5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	100	72
Impaired Financing Receivable, Related Allowance	25	20
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	44	25
Carrying value before allowance	44	25
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	10	4
Impaired Financing Receivable, with Related Allowance, Recorded Investment	34	21
Impaired Financing Receivable, Related Allowance	6	3
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	76	44
Carrying value before allowance	62	44
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	62	44
Impaired Financing Receivable, Related Allowance	18	15
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	5	8
Carrying value before allowance	5	8
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1	1
Impaired Financing Receivable, with Related Allowance, Recorded Investment	4	7
Impaired Financing Receivable, Related Allowance	$ 1	$ 2

XML

Finance Receivables and Loans, Net (Schedule of Average Balance and Interest Income of Impaired Finance Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	$ 717	$ 643	$ 697	$ 653
Impaired Financing Receivable, Interest Income, Accrual Method	7	7	21	24
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	600	556	598	574
Impaired Financing Receivable, Interest Income, Accrual Method	6	7	19	20
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	347	288	340	291
Impaired Financing Receivable, Interest Income, Accrual Method	4	4	12	13
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	253	268	258	283
Impaired Financing Receivable, Interest Income, Accrual Method	2	3	7	7
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	8	7	8	7
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	0	0
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	245	261	250	276
Impaired Financing Receivable, Interest Income, Accrual Method	2	3	7	7
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	117	87	99	79
Impaired Financing Receivable, Interest Income, Accrual Method	1	0	2	4
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	48	36	35	35
Impaired Financing Receivable, Interest Income, Accrual Method	1	0	1	1
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	63	45	58	39
Impaired Financing Receivable, Interest Income, Accrual Method	0	0	1	3
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Average Recorded Investment	6	6	6	5
Impaired Financing Receivable, Interest Income, Accrual Method	$ 0	$ 0	$ 0	$ 0

XML

Finance Receivables and Loans, Net (Troubled Debt Restructurings) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 640		$ 640		$ 625
Financing Receivable, Modifications, Number of Contracts	4,464	4,667	14,913	12,934,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 76	$ 112	$ 254	$ 268
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 64	$ 103	$ 218	$ 237
Consumer Portfolio Segment [Member] | Consumer Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4,464	4,665	14,913	12,932,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 76	$ 88	$ 254	$ 244
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 64	$ 79	$ 218	$ 213
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	4,427	4,612	14,816	12,763,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 70	$ 75	$ 238	$ 202
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 58	$ 66	$ 202	$ 173
Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	37	53	97	169,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 6	$ 13	$ 16	$ 42
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6	$ 13	$ 16	$ 40
Consumer Portfolio Segment [Member] | Mortgage Finance [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	2	3	5	5,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 2	$ 2	$ 3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 2	$ 2	$ 3
Consumer Portfolio Segment [Member] | Mortgage - Legacy [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	35	50	92	164,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 6	$ 11	$ 14	$ 39
Financing Receivable, Modifications, Post-Modification Recorded Investment	6	$ 11	14	$ 37
Commercial Portfolio Segment [Member] | Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 2		$ 2		$ 2
Financing Receivable, Modifications, Number of Contracts	0	2	0	2,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 24	$ 0	$ 24
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 24	$ 0	$ 24
Commercial Portfolio Segment [Member] | Commercial And Industrial Automobile [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial Portfolio Segment [Member] | Commercial And Industrial Other [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1	0	1,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 21	$ 0	$ 21
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 21	$ 0	$ 21
Commercial Portfolio Segment [Member] | Commercial Real Estate Automobile [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	1	0	1,000,000
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 3	$ 0	$ 3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 3	$ 0	$ 3

XML

Finance Receivables and Loans, Net (Redefaults) (Details) - Consumer Portfolio Segment [Member] $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Consumer Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1,960	1,744	5,621	4,831
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 23	$ 22	$ 69	$ 59
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 14	$ 12	$ 39	$ 33
Automobile Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1,959	1,742	5,617	4,822
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 23	$ 21	$ 69	$ 58
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 14	$ 12	$ 39	$ 33
Mortgage Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 0	$ 0	$ 0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0
Mortgage - Legacy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	1	2	4	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0	$ 1	$ 0	$ 1
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0

XML

Investment in Operating Leases, Net (Investments In Operating Leases) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Leases, Operating [Abstract]
Property Subject to or Available for Operating Lease, Gross	$ 16,086	$ 20,211
Property Subject to or Available for Operating Lease, Accumulated Depreciation	(3,397)	(3,940)
Property Subject to or Available for Operating Lease, Net	$ 12,689	$ 16,271

XML

Investment in Operating Leases, Net (Schedule Of Depreciation Expense On Operating Lease Assets) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Leases, Operating [Abstract]
Depreciation Expense On Operating Lease Assets	$ 470	$ 633	$ 1,555	$ 1,995
Gross Remarketing (Gains) Losses	(62)	(105)	(203)	(282)
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	$ 408	$ 528	$ 1,352	$ 1,713

XML

Securitizations and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Total consoldiated involvement with VIEs	$ 39,646	$ 44,940
Assets of nonconsolidated variable interest entities	3,240	3,034
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	3,820	3,527
Other assets	6,307	6,321
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	23,608	27,967
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	24	0
Assets of nonconsolidated variable interest entities	3,240	3,034
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	3,264	3,034
Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Amount Outstanding	10,000	10,600
Commercial Portfolio Segment [Member] | Automobile Loan [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	15,746	16,763
Commercial Portfolio Segment [Member] | Other Financing Receivables [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets	268	210
Assets of nonconsolidated variable interest entities	0	0
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	556	493
Other assets	276	222
Accrued Liabilities	$ 8	$ 12

XML

Securitizations and Variable Interest Entities (Schedule of Cash Flow Received and Paid o Nonconsolidated Securitization Entities) (Details) - Consumer Portfolio Segment [Member] - Automobile Loan [Member] - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flow Received and Paid to Nonconsolidated Securitization Entities [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	$ 1,659	$ 1,044
Cash Flows Between Transferor and Transferee, Servicing Fees	27	$ 21
Cash Flows Between Transferor and Transferee, Receipts on Transferor's Interest in Transferred Financial Assets, Other	$ 6

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Securitizations and Variable Interest Entities (Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	$ 121,305		$ 121,305		$ 116,486
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	700		700		721
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	216	$ 162	552	$ 414
On-Balance Sheet Loans [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	115,015		115,015		111,705
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	683		683		699
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	213	161	544	411
On-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	64,816		64,816		64,292
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	603		603		591
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	219	156	540	384
On-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Residential Mortgage [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	10,857		10,857		9,773
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	80		80		108
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	(6)	6	4	29
On-Balance Sheet Loans [Member] | Commercial Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	36,036		36,036		34,895
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	0		0		0
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	0	0	0	0
On-Balance Sheet Loans [Member] | Commercial Portfolio Segment [Member] | Other Financing Receivables [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	3,306		3,306		2,745
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	0		0		0
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	0	(1)	0	(2)
Off-Balance Sheet Loans [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,734		2,734		2,529
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	11		11		9
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	2	1	6	3
Off-Balance Sheet Loans [Member] | Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,734		2,734		2,529
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	11		11		9
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	2	1	6	3
Whole-Loan Transactions [Member]
Quantitative Information about Securitized and Other Financial Assets Managed Together [Line Items]
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	3,556		3,556		2,252
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement	6		6		$ 13
Net Credit Losses During Period on Loans Managed or Securitized or Asset-backed Financing Arrangement	$ 1	$ 0	$ 2	$ 0

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Servicing Activities (Schedule of Total Serviced Automobile Loans Outstanding) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Automobile Serviced Assets [Line Items]
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets	$ 18	$ 12	$ 49	$ 32
Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets	18	$ 12	49	$ 32
Servicing Asset	119,625		119,625		$ 119,808
Consumer Loan [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	64,672		64,672		64,067
Commercial Loan [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	36,036		36,036		34,895
Operating Leases [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	12,497		12,497		15,965
Other Assets [Member] | On-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	68		68		72
Securitizations [Member] | Off-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	2,760		2,760		2,550
Whole-Loan Transactions [Member] | Off-Balance Sheet Loans [Member] | Automobile Loan [Member]
Automobile Serviced Assets [Line Items]
Servicing Asset	$ 3,592		$ 3,592		$ 2,259

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Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Mar. 21, 2016	Dec. 31, 2015
Other Assets [Abstract]
Property, Plant and Equipment, Gross	$ 838		$ 691
Accumulated depreciation	(507)		(456)
Property, Plant and Equipment, Net	331		235
Restricted cash collections for securitization trusts	1,473		2,010
Deferred Tax Assets, Net	967		1,369
Nonmarketable equity investments	818		418
Other accounts receivable	447		158
Interest Receivable	408		402
Goodwill	240		27
Cash reserve deposits held for securitization trusts	188		252
Derivative Asset, Fair Value, Gross Asset	141		233
Restricted Cash and Cash Equivalents	98		120
Cash and securities collateral placed with counterparties	78		125
Other Assets, Miscellaneous	1,118		972
Other Assets	6,307		6,321
Federal Home Loan Bank Stock	352		391
Federal Reserve Bank Stock	$ 435	$ 435	$ 0

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Other Assets Other Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 01, 2016	Dec. 31, 2015
Goodwill [Line Items]
Goodwill	$ 240		$ 27
Insurance Operations [Member]
Goodwill [Line Items]
Goodwill	27		27
Corporate and Other [Member]
Goodwill [Line Items]
Goodwill	193	$ 193	0
Automotive Finance Operations [Member]
Goodwill [Line Items]
Goodwill	$ 20		$ 0

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Deposit Liabilities (Schedule of Deposit Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Deposits [Abstract]
Noninterest-bearing deposit liabilities	$ 101	$ 89
Interest-bearing Deposit Liabilities, by Component [Abstract]
Deposits, Savings Deposits	44,846	36,386
Time Deposits	30,604	29,774
Deposits, Retail	193	229
Deposits	75,744	66,478
Time Deposits, $100,000 or More	11,500	11,500
Time Deposits, $250,000 or More, Domestic	$ 3,100	$ 3,200

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Short-term Borrowings (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Demand Notes	$ 3,525	$ 3,369
Federal Home Loan Bank, Advances, Short-term	2,250	4,000
Securities Sold under Agreements to Repurchase, Gross	659	648
Other Short-term Borrowings	0	84
Short-term Debt	6,434	8,101
Non-derivative Cash Collateral Placed with Counterparties Associated with the Repurchase Agreements	7	21
Unsecured Debt [Member]
Short-term Debt [Line Items]
Demand Notes	3,525	3,369
Federal Home Loan Bank, Advances, Short-term	0	0
Securities Sold under Agreements to Repurchase, Gross	0	0
Other Short-term Borrowings	0	84
Short-term Debt	3,525	3,453
Secured Debt [Member]
Short-term Debt [Line Items]
Demand Notes	0	0
Federal Home Loan Bank, Advances, Short-term	2,250	4,000
Securities Sold under Agreements to Repurchase, Gross	659	648
Other Short-term Borrowings	0	0
Short-term Debt	2,909	$ 4,648
Secured Debt [Member] | Maturity up to 30 days [Member]
Short-term Debt [Line Items]
Mortgage-backed Residential Securities Sold under Agreements to Repurchase, Maturity Period	304
Secured Debt [Member] | Maturity 31 to 60 Days [Member]
Short-term Debt [Line Items]
Mortgage-backed Residential Securities Sold under Agreements to Repurchase, Maturity Period	$ 355

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Long-term Debt (Long-term Debt Portfolio) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	$ 15,084	$ 11,256
Long-term Debt, Excluding Current Maturities	41,271	54,647
Derivative, Amount of Hedged Item	481	331
Long-term debt	56,836	66,234
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	3,279	1,829
Long-term Debt, Excluding Current Maturities	16,410	18,803
Derivative, Amount of Hedged Item	471	334
Long-term debt	20,160	20,966
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	11,805	9,427
Long-term Debt, Excluding Current Maturities	24,861	35,844
Derivative, Amount of Hedged Item	10	(3)
Long-term debt	36,676	45,268
Trust Preferred Securities Subject to Mandatory Redemption [Member]
Debt Instrument [Line Items]
Long-term Debt, Excluding Current Maturities	2,600	2,600
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Long-term debt	6,100	5,400
Committed Funding Facilities [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	18,125	20,415
Committed Funding Facilities [Member] | Bank Funding Member | Secured Debt [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,600	$ 3,250

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Long-term Debt (Scheduled Remaining Maturity of Long-term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
2016	$ 2,116
2017	16,129
2018	11,111
2019	8,820
2020	6,328
2021 and thereafter	11,851
Derivative, Amount of Hedged Item	481	$ 331
Long-term debt	56,836	66,234
Unsecured Debt [Member]
Debt Instrument [Line Items]
2016	(2)
2017	4,274
2018	3,599
2019	1,623
2020	2,173
2021 and thereafter	8,022
Derivative, Amount of Hedged Item	471	334
Debt Instrument, Unamortized Discount	(1,347)
Long-term debt	20,160	20,966
Debt Instrument, Unamortized Discount	(21)
Unsecured Debt [Member] | Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Noncurrent	(91)
Unsecured Debt [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Noncurrent	(101)
Unsecured Debt [Member] | Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Noncurrent	(39)
Unsecured Debt [Member] | Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Noncurrent	(39)
Unsecured Debt [Member] | Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount, Noncurrent	(1,056)
Secured Debt [Member]
Debt Instrument [Line Items]
2016	2,118
2017	11,855
2018	7,512
2019	7,197
2020	4,155
2021 and thereafter	3,829
Derivative, Amount of Hedged Item	10	(3)
Long-term debt	36,676	$ 45,268
Long-term Debt [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
2016	19
2017	4,365
2018	3,700
2019	1,662
2020	2,212
2021 and thereafter	9,078
Derivative, Amount of Hedged Item	471
Long-term debt	21,507
original issue discount [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Derivative, Amount of Hedged Item	$ 0

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Long-term Debt (Pledged Assets Related to Secured Borrowings and Repurchase Agreement) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Pledged Assets related to secured borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	$ 586	$ 2,420
Pledged Assets, Mortgage assets held for investment	10,770	9,743
Pledged Assets, Investment in operating leases	2,706	5,539
Pledged Assets, Not Separately Reported, Other	93	0
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	62,300	71,649
Secured Debt	39,585	49,916
Short-term Debt	6,434	8,101
Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	0	1,761
Pledged Assets, Mortgage assets held for investment	10,770	9,743
Pledged Assets, Investment in operating leases	1,290	3,205
Pledged Assets, Not Separately Reported, Other	0	0
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	36,565	43,053
Secured Debt	17,736	24,787
Pledged assets for Federal Home Loan Bank [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	14,500	14,900
Pledged assets for Federal Reserve Bank [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	2,400	2,900
Secured Debt [Member]
Pledged Assets related to secured borrowings [Line Items]
Short-term Debt	2,909	4,648
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	28,870	34,324
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	5,485	9,167
Commercial Portfolio Segment [Member] | Automobile Loan [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	19,275	19,623
Commercial Portfolio Segment [Member] | Automobile Loan [Member] | Ally Bank [Member]
Pledged Assets related to secured borrowings [Line Items]
Pledged Assets, Not Separately Reported, Finance Receivables	$ 19,020	$ 19,177

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Long-term Debt Long-term Debt (Narrative - Trust Preferred Securities) (Details) $ / shares in Units, $ in Billions	Sep. 30, 2016 USD ($) $ / shares
Narrative - Trust Preferred Securities [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.125%
Preferred Stock, Liquidation Preference Per Share | $ / shares	$ 25
From and including February 15, 2016, to but excluding February 15, 2040, distributions will be payable at an annual rate equal to three-month London interbank offer rate plus:	5.785%
Ally has the right to defer payments of interest for a period not exceeding consecutive quarters of:	20
Percent of principle debt, plus accrued and unpaid interest is the redemption price if Ally redeems the Series 2 TRUPS on or after February 15, 2016.	100.00%
Fixed Income Interest Rate [Member]
Narrative - Trust Preferred Securities [Line Items]
Trust preferred securities | $	$ 2.6

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Long-term Debt (Committed Funding Facilities) (Details) - Committed Funding Facilities [Member] - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Outstanding	$ 14,675	$ 20,164
Unused capacity	3,450	251
Line of Credit Facility, Maximum Borrowing Capacity	18,125	20,415
Bank Funding Member | Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	2,950	3,250
Unused capacity	650	0
Line of Credit Facility, Maximum Borrowing Capacity	3,600	3,250
Nonbank Funding [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	11,725	16,914
Unused capacity	2,800	251
Line of Credit Facility, Maximum Borrowing Capacity	14,525	$ 17,165
Revolving secured funding facilities 1 year or greater [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 14,100

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Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable	$ 781	$ 391
Accrued Employee Benefits	218	242
Liability for Claims and Claims Adjustment Expense	150	169
Cash and securities collateral placed with counterparties	113	82
Deferred Revenue	66	108
Derivative Liability, Fair Value, Gross Liability	46	145
Other Accrued Liabilities	424	408
Accounts Payable and Accrued Liabilities	$ 1,798	$ 1,545

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Preferred Stock (Schedule Of Preferred Stock) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	May 16, 2016
Schedule of Capitalization, Equity [Line Items]
Non U S Dept Of Treasury Held Preferred Stock And APIC	$ 0	$ 696
Preferred Stock, Liquidation Preference Per Share	$ 25
Series A Preferred Stock [Member]
Schedule of Capitalization, Equity [Line Items]
Non U S Dept Of Treasury Held Preferred Stock And APIC	$ 0	$ 696	$ 696
Preferred stock par value (per share)	$ 0.00	$ 0.01
Preferred Stock, Liquidation Preference Per Share	$ 0	$ 25
Preferred Stock, Shares Authorized	0	40,870,560
Preferred Stock, Shares Issued and Outstanding	0	27,870,560
Preferred Stock, Dividend Rate, Percentage	0.00%	8.50%
Preferred Stock, Dividend Payment Rate, Variable	0	Three month LIBOR + 6.243%
Stock Redeemed or Called During Period, Shares	27,870,560
Preferred Stock, Redemption Price Per Share			$ 25
Dividends Payable, Amount Per Share			$ 0.53
Preferred Stock Redemption, Aggregate Liquidation Preference	$ 697
Preferred Stock, Redemption Amount			$ 712
Preferred stock dividends paid for Series A redemption	$ 15

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Accumulated Other Comprehensive (Loss) Income (Rollforward) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax			$ (159)	$ (21)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	$ (4)	$ 62	258	(35)
Ending Balance Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	99	(56)	99	(56)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax			9	36
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax			5	(21)
Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	14	15	14	15
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax			8	7
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent			0	0
Ending Balance Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	8	7	8	7
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Beginning Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax			(89)	(88)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent			(1)	0
Ending Balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(90)	(88)	(90)	(88)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax			(231)	(66)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4)	61	262	(56)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 31	$ (122)	$ 31	$ (122)

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Accumulated Other Comprehensive (Loss) Income (Before and After Tax) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax	$ 41	$ 106	$ 506	$ 53
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	52	6	145	106
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	(11)	100	361	(53)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(4)	(41)	(133)	(21)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(11)	(3)	(30)	(39)
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent	7	(38)	(103)	18
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	37	65	373	32
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	41	3	115	67
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(4)	62	258	(35)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(2)	(17)	10	(33)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax		(1)	(1)	42
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent		(16)	11	(75)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	1	5	(4)	11
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax		0	0	(20)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent		5	(4)	31
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(1)	(12)	6	(22)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, Net of Tax		(1)	(1)	22
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent		(11)	7	(44)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period, Before Tax	2	15	(4)	31
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, before Tax				(4)
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, before Tax				35
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period, Tax	(1)	(5)	2	(11)
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, Tax				1
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, Tax				(12)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Other Comprehensive Income Unrealized Gain Loss On Net Investment Hedges Arising During the Period Net of Tax	1	10	(2)	20
Other Comprehensive Income (Loss), Reclassification Adjustment for Net Investment Hedges Included in Net Income, Discontinued Operation, Net of Tax				(3)
Other Comprehensive Income (Loss), Net Investment Hedges Attributable to Parent, Net of Tax				23
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, [Abstract]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax			0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax			(1)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11)	99	367	(93)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	7	(38)	(105)	37
Other Comprehensive Income (Loss), Net of Tax	$ (4)	$ 61	$ 262	$ (56)

XML

Earnings per Common Share (Schedule of Basic and Diluted Earnings per Common Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 261	$ 273	$ 865	$ 621
Dividends, Preferred Stock, Cash	0	(38)	(30)	(1,356)
Net income (loss) from continuing operations attributable to common shareholders	261	235	835	(735)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(52)	(5)	(46)	405
Net Income (Loss) Available to Common Stockholders, Basic	$ 209	$ 230	$ 789	$ (330)
Weighted Average Number of Shares Outstanding, Basic	482,392,811	483,073,329	483,992,930	482,725,342
Weighted Average Number of Shares Outstanding, Diluted	483,575,307	484,399,091	484,762,142	482,725,342
Stock Repurchase and Redemption Premium				$ 1,193
Earnings Per Share, Basic [Abstract]
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.54	$ 0.49	$ 1.73	$ (1.52)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.11)	(0.01)	(0.10)	0.84
Earnings Per Share, Basic	0.43	0.48	1.63	(0.68)
Earnings Per Share, Diluted [Abstract]
Income (Loss) from Continuing Operations, Per Diluted Share	0.54	0.49	1.72	(1.52)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.11)	(0.01)	(0.10)	0.84
Earnings Per Share, Diluted	$ 0.43	$ 0.47	$ 1.63	$ (0.68)

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Regulatory Capital and Other Regulatory Matters (Schedule of Regulatory Capital Amount and Ratios) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Mar. 21, 2016	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk-weighted Assets	4.50%	4.50%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Common equity Tier 1 capital conservation buffer	2.50%	2.50%
Federal Reserve Bank Stock	$ 435,000,000	$ 435,000,000		$ 435,000,000	$ 0
assets greater than $50 billion	50,000,000,000	50,000,000,000
Dividends	0.08
Stock Repurchase Program, Authorized Amount	700,000,000	700,000,000
Treasury Stock, Value, Acquired, Cost Method	$ 159,000,000	$ 173,000,000	$ 16,000,000
Treasury Stock, Common, Shares	8,297,653	8,297,653
Common Stock, Shares, Outstanding	475,469,882	475,469,882			481,980,111
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk-weighted Assets	4.50%	4.50%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Common Equity Tier 1 Capital	$ 12,913,000,000	$ 12,913,000,000			$ 12,507,000,000
Percentage of Common Equity Tier 1 Capital to Risk-weighted Assets	9.53%	9.53%			9.21%
Tier One Risk Based Capital	$ 15,087,000,000	$ 15,087,000,000			$ 15,077,000,000
Tier One Risk Based Capital to Risk Weighted Assets	11.13%	11.13%			11.10%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	6.00%	6.00%
Capital	$ 17,343,000,000	$ 17,343,000,000			$ 17,005,000,000
Capital to Risk Weighted Assets	12.80%	12.80%			12.52%
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Leverage Capital	$ 15,087,000,000	$ 15,087,000,000			$ 15,077,000,000
Tier One Leverage Capital to Average Assets	9.73%	9.73%			9.73%
Ally Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 Capital Required for Capital Adequacy to Risk-weighted Assets	4.50%	4.50%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	6.00%	6.00%
Capital Required for Capital Adequacy to Risk Weighted Assets	8.00%	8.00%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	15.00%	15.00%
Common Equity Tier 1 Capital	$ 17,537,000,000	$ 17,537,000,000			$ 16,594,000,000
Percentage of Common Equity Tier 1 Capital to Risk-weighted Assets	17.21%	17.21%			17.05%
Common Equity Tier 1 Capital Required to be Well Capitalized to Risk-weighted Assets	6.50%	6.50%
Tier One Risk Based Capital	$ 17,537,000,000	$ 17,537,000,000			$ 16,594,000,000
Tier One Risk Based Capital to Risk Weighted Assets	17.21%	17.21%			17.05%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	8.00%	8.00%
Capital	$ 18,069,000,000	$ 18,069,000,000			$ 17,043,000,000
Capital to Risk Weighted Assets	17.73%	17.73%			17.51%
Capital Required to be Well Capitalized to Risk Weighted Assets	10.00%	10.00%
Tier One Leverage Capital	$ 17,537,000,000	$ 17,537,000,000			$ 16,594,000,000
Tier One Leverage Capital to Average Assets	15.45%	15.45%			15.38%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	5.00%	5.00%

XML

Derivative Instruments and Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Forward Contract Indexed to Issuer's Equity [Line Items]
Derivative, Notional Amount	$ 38,379	$ 59,116
Cash Collateral Placed with Counterparties Excluding Cash Collateral Associated with Repurchase Agreements	70	103
Securities Collateral Placed with Counterparties	49	86
Non-derivative Cash Collateral Placed with Counterparties Associated with the Repurchase Agreements	7	21
Cash Collateral Received from Counterparties, Excluding Collateral Associated with Repurchase Agreements	113	82
Non-cash collateral received	2	7
Designated as Hedging Instrument [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Derivative, Notional Amount	6,975	14,340
Designated as Hedging Instrument [Member] | Equity Contract [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Derivative, Notional Amount	17	32
Designated as Hedging Instrument [Member] | Forward Contracts [Member] | Equity Contract [Member]
Forward Contract Indexed to Issuer's Equity [Line Items]
Derivative, Notional Amount	$ 17	$ 32

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Derivative Instruments and Hedging Activities (Fair Value Amounts of Derivative Instruments Reported on our Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 141	$ 233
Derivative Liability, Fair Value, Gross Liability	46	145
Derivative, Notional Amount	38,379	59,116
Interest Receivable	408	402
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	114	126
Derivative Liability, Fair Value, Gross Liability	7	10
Derivative, Notional Amount	6,975	14,340
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	114	126
Derivative Liability, Fair Value, Gross Liability	7	9
Derivative, Notional Amount	6,754	14,151
Hedge notional amount associated with debt maturing in five or more years	2,300
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	1
Derivative, Notional Amount	221	189
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Receive-fixed Swaps, Fair Value, Gross Asset	104	112
Receive-fixed Swaps, Fair Value, Gross Liability	0	3
Receive-fixed Swaps, Notional Amount	2,300	6,800
Pay-fixed Swaps, Fair Value, Gross Asset	0	13
Pay-fixed Swaps, Fair Value, Gross Liability	7	3
Pay-fixed Swaps, Notional Amount	3,500	6,800
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	26	105
Derivative Liability, Fair Value, Gross Liability	35	125
Derivative, Notional Amount	31,276	44,466
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	0
Derivative Liability, Fair Value, Gross Liability	0	0
Derivative, Notional Amount	111	278
Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	2
Derivative Liability, Fair Value, Gross Liability	4	10
Derivative, Notional Amount	17	32
Interest Rate Swap [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	5	30
Derivative Liability, Fair Value, Gross Liability	15	51
Derivative, Notional Amount	864	6,101
Foreign Exchange Forward [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	0
Derivative Liability, Fair Value, Gross Liability	0	0
Derivative, Notional Amount	111	278
Futures and Forwards [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	2
Derivative Liability, Fair Value, Gross Liability	0	2
Derivative, Notional Amount	0	1,905
Written Options [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	20	72
Derivative, Notional Amount	15,206	18,220
Written Options [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	0	1
Derivative, Notional Amount	0	0
Purchased Options [Member] | Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	21	73
Derivative Liability, Fair Value, Gross Liability	0	0
Derivative, Notional Amount	15,206	18,240
Purchased Options [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	2
Derivative Liability, Fair Value, Gross Liability	0	0
Derivative, Notional Amount	0	0
Forward Contracts [Member] | Equity Contract [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	4	9
Derivative, Notional Amount	17	32
Other Trading [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	27	107
Derivative Liability, Fair Value, Gross Liability	39	135
Derivative, Notional Amount	31,404	44,776
Secured Debt [Member] | Fair Value Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Receive-fixed Swaps, Fair Value, Gross Asset	10	1
Receive-fixed Swaps, Fair Value, Gross Liability	0	2
Receive-fixed Swaps, Notional Amount	898	500
Derivative assets in net asset position [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	140	224
Interest Receivable	7	46
Derivative assets in net liability positions [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	9
Interest Receivable	$ 1	$ 12

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Derivative Instruments and Hedging Activities (Statement of Gains and Losses on Derivative Instruments Reported in Statement of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 0	$ 1	$ (5)	$ 16
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(4)	(5)	(13)	(132)
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(5)	(2)	(2)	(11)
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(1)	0	(6)	(130)
Equity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	2	(4)	0	(7)
Interest Income [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	16	(34)	(18)	(50)
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	0	(2)	0	(2)
Interest Income [Member] | Interest Rate Contract [Member] | Hedges of Retail Auto Loans Held for Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	4	18	16	50
Interest Income [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(17)	38	16	73
Interest Income [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Losses Related to Amortization of Deferred Basis Adjustments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	6	1	15	1
Interest Income [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Gains Related to Amortization of Deferred Basis Adjustments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	23	14	62	59
Interest Expense [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(31)	132	211	121
Interest Expense [Member] | Interest Rate Contract [Member] | Hedges of Unsecured Debt Held for Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	7	24	34	71
Interest Expense [Member] | Interest Rate Contract [Member] | Hedges of Secured Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	1		4
Interest Expense [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	32	(135)	(214)	(128)
Interest Expense [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	0	(1)	(2)	(139)
Other Income [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	(5)	0	(2)	(9)
Other Income [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(1)	1	(4)	9
Other Income [Member] | Foreign Exchange Contract [Member] | Revaluation of Foreign-Denominated Debt or Receivable [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	1	1	4	134
Employee compensation and benefits [Member] | Equity Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 2	$ (4)	$ 0	$ (7)

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Derivative Instruments and Hedging Activities (Derivative Instruments Used in Net Investment Hedge Accounting Relationships) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease)	$ 2	$ 16	$ 9	$ (56)
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(1)	0	(6)	(130)
Foreign Exchange Contract [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	(4)
Net Investment Hedges - Total Other Income, Net of Losses	0	0	0	(4)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	2	15	(4)	35
Other Income [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	(1)	1	(4)	9
Other Income [Member] | Revaluation of Foreign-Denominated Debt or Receivable [Member] | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 1	$ 1	$ 4	$ 134

XML

Income Taxes (Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 130	$ 144	$ 336	$ 341

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Fair Value (Fair Value Measurment - Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 17,701	$ 17,157
Derivative Assets	21	88
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	$ (24)	$ (65)
Available-for-sale, Equity Investment in Any One Industry Did Not Exceed Percentage	14.00%	14.00%
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 17,701	$ 17,157
Retained Interest, Fair Value Disclosure	32	40
Derivative Assets	141	233
Assets, Fair Value Disclosure	17,874	17,430
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(46)	(145)
Liabilities, Fair Value Disclosure	(46)	(145)
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(42)	(135)
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		(1)
Fair Value, Measurements, Recurring [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(4)	(9)
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	17,131	16,440
Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	321	1,741
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	763	716
Fair Value, Measurements, Recurring [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	180	177
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	12,143	10,366
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	524	481
Fair Value, Measurements, Recurring [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,570	1,755
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,630	1,204
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	570	717
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	140	231
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	1
Fair Value, Measurements, Recurring [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	902	2,196
Retained Interest, Fair Value Disclosure	0	0
Derivative Assets	0	4
Assets, Fair Value Disclosure	902	2,200
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	(3)
Liabilities, Fair Value Disclosure	0	(3)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	(2)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	(1)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	332	1,479
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	321	1,469
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	11	10
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	570	717
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	16,799	14,961
Retained Interest, Fair Value Disclosure	0	0
Derivative Assets	141	229
Assets, Fair Value Disclosure	16,940	15,190
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(46)	(142)
Liabilities, Fair Value Disclosure	(46)	(142)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(42)	(133)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		(1)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	(4)	(8)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	16,799	14,961
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	272
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	763	716
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	169	167
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	12,143	10,366
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	524	481
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,570	1,755
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	1,630	1,204
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	140	229
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Retained Interest, Fair Value Disclosure	32	40
Derivative Assets	0	0
Assets, Fair Value Disclosure	32	40
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Government Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets	$ 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets		$ 0

XML

Fair Value (Fair Value Measurement - Reconciliation of Level 3 Assets And Liabilities) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance	$ 31	$ 36	$ 40	$ 50
Net realized/unrealized gains (losses) included in earnings, Assets	1	1	4	9
Net realized/unrealized gains (losses) included in other comprehensive income, Assets	0	0	0	0
Purchases, Assets	0	0	0	0
Sales, Assets	2	(4)	8	(4)
Issuances, Assets	0	1	0	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(2)	(5)	(20)	(28)
Fair Value, Assets, Ending balance	32	29	32	29
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	0	0
Retained Interest [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance	31	32	40	47
Net realized/unrealized gains (losses) included in earnings, Assets	1	1	4	8
Net realized/unrealized gains (losses) included in other comprehensive income, Assets	0	0	0	0
Purchases, Assets	0	0	0	0
Sales, Assets	2	0	8	0
Issuances, Assets	0	1	0	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(2)	(5)	(20)	(28)
Fair Value, Assets, Ending balance	32	29	32	29
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 0	0	$ 0	0
Mortgage Loans Held-for-Sale, Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Assets, Beginning balance		4		3
Net realized/unrealized gains (losses) included in earnings, Assets		0		1
Net realized/unrealized gains (losses) included in other comprehensive income, Assets		0		0
Purchases, Assets		0		0
Sales, Assets		(4)		(4)
Issuances, Assets		0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0		0
Fair Value, Assets, Ending balance		0		0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		$ 0		$ 0

XML

Fair Value (Fair Value Measurement - Nonrecurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	$ 56	$ 105
Fair Value, Measurements, Nonrecurring [Member] | Loans held-for-sale, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group			$ 37
Lower of cost or fair value or valuation reserve allowance			0
Fair Value, Measurements, Nonrecurring [Member] | Loans held-for-sale, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56		37
Lower of cost or fair value or valuation reserve allowance	0		0
Fair Value, Measurements, Nonrecurring [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	30		13
Lower of cost or fair value or valuation reserve allowance	(7)		(4)
Fair Value, Measurements, Nonrecurring [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	45		30
Lower of cost or fair value or valuation reserve allowance	(17)		(15)
Fair Value, Measurements, Nonrecurring [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	75		43
Lower of cost or fair value or valuation reserve allowance	(24)		(19)
Fair Value, Measurements, Nonrecurring [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	15		9
Lower of cost or fair value or valuation reserve allowance	(4)		(3)
Fair Value, Measurements, Nonrecurring [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	7		2
Lower of cost or fair value or valuation reserve allowance	0		0
Fair Value, Measurements, Nonrecurring [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	153		91
Lower of cost or fair value or valuation reserve allowance	(28)		(22)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Loans held-for-sale, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Loans held-for-sale, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Loans held-for-sale, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Loans held-for-sale, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Loans held-for-sale, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group			37
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Loans held-for-sale, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56		37
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Finance Receivables And Loans, Automotive [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	30		13
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Finance Receivables And Loans, Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	45		30
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial Finance Receivables and Loans, Net, Fair Value	75		43
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Repossessed And Foreclosed Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	15		9
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	7		2
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Assets, Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	$ 153		$ 91

XML

Fair Value Fair Value (Fair Value Measurements - Nonrecurring Fair Value Inputs) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	$ 56	$ 105

XML

Fair Value (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	$ 649	$ 0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Loans and Leases Receivable, Net Amount	113,825	110,546
Nonmarketable equity investments	818	418
Deposits	75,744	66,478
Short-term Debt	6,434	8,101
Long-term debt	56,836	66,234
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	649
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Loans and Leases Receivable, Net Amount	113,825	110,546
Nonmarketable equity investments	818	418
Deposits	75,744	66,478
Short-term Debt	6,434	8,101
Long-term debt	56,836	66,234
Portion at Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	658
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Loans and Leases Receivable, Net Amount	114,847	110,737
Nonmarketable equity investments	837	433
Deposits	76,231	66,889
Short-term Debt	6,435	8,102
Long-term debt	59,195	68,175
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0	0
Loans and Leases Receivable, Net Amount	0	0
Nonmarketable equity investments	0	0
Deposits	0	0
Short-term Debt	0	0
Long-term debt	0	0
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	658
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0	0
Loans and Leases Receivable, Net Amount	0	0
Nonmarketable equity investments	787	391
Deposits	0	0
Short-term Debt	0	0
Long-term debt	22,405	23,018
Portion at Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Loans and Leases Receivable, Net Amount	114,847	110,737
Nonmarketable equity investments	50	42
Deposits	76,231	66,889
Short-term Debt	6,435	8,102
Long-term debt	$ 36,790	$ 45,157

XML

Offsetting Assets and Liabilities Offsetting Assets and Liabilities (Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 141	$ 233
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	141	233
Derivative Asset, Not Subject to Master Netting Arrangement	(16)	(78)
Derivative, Collateral, Obligation to Return Cash	(104)	(67)
Derivative Asset	21	88
Customer Securities for which Entity has Right to Sell or Repledge, Fair Value	2	7
Derivative assets in net liability positions [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset	1	9
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	1	9
Derivative Asset, Not Subject to Master Netting Arrangement	(1)	(9)
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset	0	0
Derivative assets in net asset position [Member]
Offsetting Assets [Line Items]
Derivative Asset, Fair Value, Gross Asset	140	224
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	140	224
Derivative Asset, Not Subject to Master Netting Arrangement	(15)	(69)
Derivative, Collateral, Obligation to Return Cash	(104)	(67)
Derivative Asset	$ 21	$ 88

XML

Offsetting Assets and Liabilities Offsetting Assets and Liabilities (Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ (46)	$ (145)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(46)	(145)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	15	78
Derivative, Collateral, Right to Reclaim Cash	7	2
Derivative Liability	(24)	(65)
Customer Securities for which Entity has Right to Sell or Repledge, Fair Value	2	7
Derivative Liabilities in Net Liability Positions [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	(28)	(68)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(28)	(68)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	9
Derivative, Collateral, Right to Reclaim Cash	7	2
Derivative Liability	(21)	(57)
Derivative liabilities in net asset positions [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	(15)	(69)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(15)	(69)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	15	69
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	0	0
Derivative liabilities with no offsetting arrangements [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	(3)	(8)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(3)	(8)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative Liability	(3)	(8)
Securities sold under agreement to repurchase [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	(659)	(648)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(659)	(648)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Derivative, Collateral, Right to Reclaim Cash	659	648
Derivative Liability	0	0
Total Derivative Liabilities [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	(705)	(793)
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	(705)	(793)
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	15	78
Derivative, Collateral, Right to Reclaim Cash	666	650
Derivative Liability	$ (24)	$ (65)

XML

Segment and Geographic Information (Financial Information Operating Segments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net Financing Revenue	$ 996	$ 970	$ 2,931	$ 2,736
Nonoperating Income (Expense)	388	332	1,138	786
Revenues	1,384	1,302	4,069	3,522
Provision for Loan Losses Expensed	258	211	650	467
Noninterest Expense	735	674	2,218	2,093
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	391	417	1,201	962
Assets	157,397	155,916	157,397	155,916	$ 158,581
Net Interest Income (Loss) after Provision for Loan Losses	738	759	2,281	2,269
Automotive Finance Operations [Member]
Segment Reporting Information [Line Items]
Net Financing Revenue	933	870	2,758	2,529
Nonoperating Income (Expense)	74	63	228	170
Revenues	1,007	933	2,986	2,699
Provision for Loan Losses Expensed	270	201	649	460
Noninterest Expense	418	409	1,255	1,237
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	319	323	1,082	1,002
Assets	113,669	113,843	113,669	113,843
Insurance Operations [Member]
Segment Reporting Information [Line Items]
Net Financing Revenue	14	16	44	42
Nonoperating Income (Expense)	264	233	777	769
Revenues	278	249	821	811
Provision for Loan Losses Expensed	0	0	0	0
Noninterest Expense	222	209	733	678
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	56	40	88	133
Assets	7,259	6,997	7,259	6,997
Mortgage Finance Operations [Member]
Segment Reporting Information [Line Items]
Net Financing Revenue	25	17	71	39
Nonoperating Income (Expense)	0	0	0	0
Revenues	25	17	71	39
Provision for Loan Losses Expensed	1	3	4	9
Noninterest Expense	16	10	48	28
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	8	4	19	2
Assets	7,933	6,326	7,933	6,326
Corporate Finance Operations [Member]
Segment Reporting Information [Line Items]
Net Financing Revenue	30	22	87	64
Nonoperating Income (Expense)	4	10	14	22
Revenues	34	32	101	86
Provision for Loan Losses Expensed	3	4	12	3
Noninterest Expense	16	14	49	42
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	15	14	40	41
Assets	3,232	2,269	3,232	2,269
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Net Financing Revenue	(6)	45	(29)	62
Nonoperating Income (Expense)	46	26	119	(175)
Revenues	40	71	90	(113)
Provision for Loan Losses Expensed	(16)	3	(15)	(5)
Noninterest Expense	63	32	133	108
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(7)	36	(28)	(216)
Assets	$ 25,304	$ 26,481	$ 25,304	$ 26,481

XML

Segment and Geographic Information (Information Concerning Principal Geographic Areas) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,384	$ 1,302	$ 4,069	$ 3,522
Income (loss) from continuing operations before income tax expense	391	417	1,201	962
Net Income (Loss) Attributable to Parent	209	268	819	1,026
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22	24	67	77
Income (loss) from continuing operations before income tax expense	10	12	32	40
Net Income (Loss) Attributable to Parent	7	9	22	510
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22	24	67	76
Income (loss) from continuing operations before income tax expense	10	11	32	35
Net Income (Loss) Attributable to Parent	9	9	27	30
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	1
Income (loss) from continuing operations before income tax expense	0	1	0	5
Net Income (Loss) Attributable to Parent	(1)	0	(4)	28
Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0		0
Income (loss) from continuing operations before income tax expense	0		0
Net Income (Loss) Attributable to Parent	(1)		(1)
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues				0
Income (loss) from continuing operations before income tax expense				0
Net Income (Loss) Attributable to Parent				452
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,362	1,278	4,002	3,445
Income (loss) from continuing operations before income tax expense	381	405	1,169	922
Net Income (Loss) Attributable to Parent	$ 202	$ 259	$ 797	$ 516

XML

Parent and Guarantor Consolidating Financial Statements (Schedule of Condensed Consolidating Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	$ 1,307	$ 1,166	$ 3,807	$ 3,358
Interest and Fee Income, Loans and Leases Held-for Sale	0	2	0	40
Interest and Dividend Income, Securities, Operating, Available-for-sale	101	102	302	283
Interest Income, Deposits with Financial Institutions	3	2	10	6
Operating Leases, Income Statement, Lease Revenue	649	830	2,119	2,586
Total financing revenue and other interest income	2,060	2,102	6,238	6,273
Interest Expense, Deposits	212	181	608	530
Interest Expense, Short-term Borrowings	14	13	39	36
Interest Expense, Long-term Debt	430	410	1,308	1,258
Interest Expense, Related Party	0	0	0	0
Interest Expense	656	604	1,955	1,824
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	408	528	1,352	1,713
Net Financing Revenue	996	970	2,931	2,736
Dividends from Bank Subsidiary				0
Dividends From Non Bank Subsidiary	0	0	0	0
Insurance Services Revenue	238	236	704	706
Gain (Loss) on Sales of Loans, Net	0	(2)	4	45
Gain (Loss) on Extinguishment of Debt	0	0	(4)	(354)
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	52	6	145	106
Noninterest Income, Other Operating Income	98	92	289	283
Nonoperating Income (Expense)	388	332	1,138	786
Revenues	1,384	1,302	4,069	3,522
Provision for Loan Losses Expensed	258	211	650	467
Labor and Related Expense	248	235	742	726
Policyholder Benefits and Claims Incurred, Net	69	61	287	239
Other Noninterest Expense	418	378	1,189	1,128
Noninterest Expense	735	674	2,218	2,093
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	391	417	1,201	962
Income Tax Expense (Benefit)	130	144	336	341
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	261	273	865	621
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(52)	(5)	(46)	405
Undistributed income of bank subsidiaries	0	0	0	0
Undistributed income of nonbank subsidiaries	0	0	0	0
Net Income (Loss) Attributable to Parent	209	268	819	1,026
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4)	61	262	(56)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	205	329	1,081	970
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	(15)	(33)	(82)	(45)
Interest and Fee Income, Loans and Leases Held-for Sale		0		0
Interest and Dividend Income, Securities, Operating, Available-for-sale	0	0	0	0
Interest Income, Deposits with Financial Institutions	1	0	4	1
Operating Leases, Income Statement, Lease Revenue	4	1	14	1
Total financing revenue and other interest income	(8)	(29)	(56)	(28)
Interest Expense, Deposits	2	3	6	8
Interest Expense, Short-term Borrowings	10	10	31	30
Interest Expense, Long-term Debt	289	272	868	856
Interest Expense, Related Party	5	3	14	28
Interest Expense	306	288	919	922
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	3	1	11	1
Net Financing Revenue	(317)	(318)	(986)	(951)
Dividends from Bank Subsidiary				525
Dividends From Non Bank Subsidiary	170	494	800	980
Insurance Services Revenue	0	0	0	0
Gain (Loss) on Sales of Loans, Net	(7)	(1)	(11)	(9)
Gain (Loss) on Extinguishment of Debt			(2)	(353)
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	0	0	0	0
Noninterest Income, Other Operating Income	298	367	989	1,045
Nonoperating Income (Expense)	291	366	976	683
Revenues	144	542	790	1,237
Provision for Loan Losses Expensed	147	48	295	111
Labor and Related Expense	143	138	430	431
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Other Noninterest Expense	307	315	963	935
Noninterest Expense	450	453	1,393	1,366
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(453)	41	(898)	(240)
Income Tax Expense (Benefit)	(88)	(30)	(196)	(231)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(365)	71	(702)	(9)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(47)	(5)	(39)	367
Undistributed income of bank subsidiaries	325	254	932	302
Undistributed income of nonbank subsidiaries	296	(52)	628	366
Net Income (Loss) Attributable to Parent	209	268	819	1,026
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(4)	61	262	(56)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	205	329	1,081	970
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	0	0	0	0
Interest and Fee Income, Loans and Leases Held-for Sale		0		0
Interest and Dividend Income, Securities, Operating, Available-for-sale	0	0	0	0
Interest Income, Deposits with Financial Institutions	0	0	0	0
Operating Leases, Income Statement, Lease Revenue	0	0	0	0
Total financing revenue and other interest income	0	0	0	0
Interest Expense, Deposits	0	0	0	0
Interest Expense, Short-term Borrowings	0	0	0	0
Interest Expense, Long-term Debt	0	0	0	0
Interest Expense, Related Party	0	0	0	0
Interest Expense	0	0	0	0
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	0	0	0	0
Net Financing Revenue	0	0	0	0
Dividends from Bank Subsidiary				525
Dividends From Non Bank Subsidiary	0	0	0	0
Insurance Services Revenue	0	0	0	0
Gain (Loss) on Sales of Loans, Net	0	0	0	0
Gain (Loss) on Extinguishment of Debt			0	0
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	0	0	0	0
Noninterest Income, Other Operating Income	0	0	0	0
Nonoperating Income (Expense)	0	0	0	0
Revenues	0	0	0	525
Provision for Loan Losses Expensed	0	0	0	0
Labor and Related Expense	0	0	0	0
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Other Noninterest Expense	0	0	0	0
Noninterest Expense	0	0	0	0
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	0	0	0	525
Income Tax Expense (Benefit)	0	0	(82)	0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	0	0	82	525
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0	0	0
Undistributed income of bank subsidiaries	325	254	932	302
Undistributed income of nonbank subsidiaries	0	(1)	(2)	(1)
Net Income (Loss) Attributable to Parent	325	253	1,012	826
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3)	65	143	40
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	322	318	1,155	866
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	1,322	1,199	3,889	3,403
Interest and Fee Income, Loans and Leases Held-for Sale		2		40
Interest and Dividend Income, Securities, Operating, Available-for-sale	102	102	303	283
Interest Income, Deposits with Financial Institutions	2	2	6	5
Operating Leases, Income Statement, Lease Revenue	645	829	2,105	2,585
Total financing revenue and other interest income	2,075	2,137	6,316	6,344
Interest Expense, Deposits	210	178	602	522
Interest Expense, Short-term Borrowings	4	3	8	6
Interest Expense, Long-term Debt	141	138	440	402
Interest Expense, Related Party	2	3	8	15
Interest Expense	357	322	1,058	945
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	405	527	1,341	1,712
Net Financing Revenue	1,313	1,288	3,917	3,687
Dividends from Bank Subsidiary				0
Dividends From Non Bank Subsidiary	0	0	0	0
Insurance Services Revenue	238	236	704	706
Gain (Loss) on Sales of Loans, Net	7	(1)	15	54
Gain (Loss) on Extinguishment of Debt			(2)	(1)
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	52	6	145	106
Noninterest Income, Other Operating Income	231	329	661	1,019
Nonoperating Income (Expense)	528	570	1,523	1,884
Revenues	1,841	1,858	5,440	5,571
Provision for Loan Losses Expensed	111	163	355	356
Labor and Related Expense	105	212	312	634
Policyholder Benefits and Claims Incurred, Net	69	61	287	239
Other Noninterest Expense	541	552	1,586	1,635
Noninterest Expense	715	825	2,185	2,508
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	1,015	870	2,900	2,707
Income Tax Expense (Benefit)	218	174	614	572
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	797	696	2,286	2,135
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(5)	0	(7)	38
Undistributed income of bank subsidiaries	0	0	0	0
Undistributed income of nonbank subsidiaries	0	0	0	0
Net Income (Loss) Attributable to Parent	792	696	2,279	2,173
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(9)	55	234	(64)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	783	751	2,513	2,109
Affiliated Entity [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	0	0	0	0
Interest Income, Deposits with Financial Institutions	0	0	0	0
Affiliated Entity [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	2	3	8	15
Interest Income, Deposits with Financial Institutions	0	0	0	0
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	0	0	0	0
Interest Income, Deposits with Financial Institutions	0	0	0	0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	2	1	6	22
Interest Income, Deposits with Financial Institutions	2	2	7	6
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	0	0	0	0
Interest and Fee Income, Loans and Leases Held-for Sale		0		0
Interest and Dividend Income, Securities, Operating, Available-for-sale	(1)	0	(1)	0
Interest Income, Deposits with Financial Institutions	0	0	0	0
Operating Leases, Income Statement, Lease Revenue	0	0	0	0
Total financing revenue and other interest income	(7)	(6)	(22)	(43)
Interest Expense, Deposits	0	0	0	0
Interest Expense, Short-term Borrowings	0	0	0	0
Interest Expense, Long-term Debt	0	0	0	0
Interest Expense, Related Party	(7)	(6)	(22)	(43)
Interest Expense	(7)	(6)	(22)	(43)
Operating Leases, Income Statement, Depreciation Expense on Property Subject to or Held-for-lease	0	0	0	0
Net Financing Revenue	0	0	0	0
Dividends from Bank Subsidiary				(1,050)
Dividends From Non Bank Subsidiary	(170)	(494)	(800)	(980)
Insurance Services Revenue	0	0	0	0
Gain (Loss) on Sales of Loans, Net	0	0	0	0
Gain (Loss) on Extinguishment of Debt			0	0
Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments	0	0	0	0
Noninterest Income, Other Operating Income	(431)	(604)	(1,361)	(1,781)
Nonoperating Income (Expense)	(431)	(604)	(1,361)	(1,781)
Revenues	(601)	(1,098)	(2,161)	(3,811)
Provision for Loan Losses Expensed	0	0	0	0
Labor and Related Expense	0	(115)	0	(339)
Policyholder Benefits and Claims Incurred, Net	0	0	0	0
Other Noninterest Expense	(430)	(489)	(1,360)	(1,442)
Noninterest Expense	(430)	(604)	(1,360)	(1,781)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(171)	(494)	(801)	(2,030)
Income Tax Expense (Benefit)	0	0	0	0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	(171)	(494)	(801)	(2,030)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	0	0	0
Undistributed income of bank subsidiaries	(650)	(508)	(1,864)	(604)
Undistributed income of nonbank subsidiaries	(296)	53	(626)	(365)
Net Income (Loss) Attributable to Parent	(1,117)	(949)	(3,291)	(2,999)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	12	(120)	(377)	24
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(1,105)	(1,069)	(3,668)	(2,975)
Consolidation, Eliminations [Member] | Affiliated Entity [Member]
Condensed Income Statements, Captions [Line Items]
Interest and Fee Income, Loans and Leases	(4)	(4)	(14)	(37)
Interest Income, Deposits with Financial Institutions	$ (2)	$ (2)	$ (7)	$ (6)

XML

Parent and Guarantor Consolidating Financial Statements (Schedule of Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	$ 1,779		$ 2,148
Interest-bearing Deposits in Banks and Other Financial Institutions	2,510		4,232
Cash and Cash Equivalents, at Carrying Value	4,289		6,380	$ 5,227		$ 5,576
Available-for-sale securities	17,701		17,157
Held-to-maturity securities	649		0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56		105
Loans and Leases Receivable, Gross	114,959		111,600	107,990
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Loans and Leases Receivable, Allowance	(1,134)	$ (1,089)	(1,054)	(1,018)	$ (974)	(977)
Loans and Leases Receivable, Net Amount	113,825		110,546
Property Subject to or Available for Operating Lease, Net	12,689		16,271
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,881		1,801
Other assets	6,307		6,321
Assets	157,397		158,581	155,916
Noninterest-bearing deposit liabilities	101		89
Interest-bearing deposit liabilities	75,643		66,389
Deposits	75,744		66,478
Short-term Debt	6,434		8,101
Long-term debt	56,836		66,234
Debt Payable To Bank Subsidiaries	0
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	462		350
Unearned Premiums	2,493		2,434
Accounts Payable and Accrued Liabilities	1,798		1,545
Liabilities	143,767		145,142
Stockholders' Equity Attributable to Parent, Total	13,630		13,439	14,599		15,399
Liabilities and Equity	157,397		158,581
Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	809		1,234
Interest-bearing Deposits in Banks and Other Financial Institutions	600		401
Cash and Cash Equivalents, at Carrying Value	1,409		1,635	1,998		2,286
Available-for-sale securities	0		0
Held-to-maturity securities	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0		0
Loans and Leases Receivable, Gross	5,501		2,636
Loans to bank subsidiary	300		600
Loans to nonbank subsidiary	1,693		3,277
Loans and Leases Receivable, Allowance	(125)		(72)
Loans and Leases Receivable, Net Amount	7,369		6,441
Property Subject to or Available for Operating Lease, Net	50		81
Receivables from bank subsidiary	343		186
Receivables from nonbank subsidiary	90		259
Investment in bank subsidiaries	17,582		16,496
Investment in nonbank subsidiaries	11,378		10,902
Premiums receivable and other insurance assets	0		0
Other assets	4,434		4,785
Assets	42,655		40,785
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	193		229
Deposits	193		229
Short-term Debt	3,525		3,453
Long-term debt	22,264		21,048
Debt Payable To Bank Subsidiaries	330
Debt Payable To Nonbank Subsidiaries	1,379		1,409
Payables to Bank Subsidiaries	436		142
Payables to Nonbank Subsidiaries	179		420
Interest payable	247		258
Unearned Premiums	0		0
Accounts Payable and Accrued Liabilities	472		387
Liabilities	29,025		27,346
Stockholders' Equity Attributable to Parent, Total	13,630		13,439
Liabilities and Equity	42,655		40,785
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Cash and Cash Equivalents, at Carrying Value	0		0	0		0
Available-for-sale securities	0		0
Held-to-maturity securities	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0		0
Loans and Leases Receivable, Gross	0		0
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	0		0
Loans and Leases Receivable, Allowance	0		0
Loans and Leases Receivable, Net Amount	0		0
Property Subject to or Available for Operating Lease, Net	0		0
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	0		0
Investment in bank subsidiaries	17,582		16,496
Investment in nonbank subsidiaries	1		11
Premiums receivable and other insurance assets	0		0
Other assets	0		0
Assets	17,583		16,507
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Deposits	0		0
Short-term Debt	0		0
Long-term debt	0		0
Debt Payable To Bank Subsidiaries	0
Debt Payable To Nonbank Subsidiaries	0		0
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	0		0
Interest payable	0		0
Unearned Premiums	0		0
Accounts Payable and Accrued Liabilities	0		82
Liabilities	0		82
Stockholders' Equity Attributable to Parent, Total	17,583		16,425
Liabilities and Equity	17,583		16,507
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	970		914
Interest-bearing Deposits in Banks and Other Financial Institutions	1,910		3,831
Cash and Cash Equivalents, at Carrying Value	3,659		5,595	3,951		3,905
Available-for-sale securities	18,030		17,157
Held-to-maturity securities	649
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56		105
Loans and Leases Receivable, Gross	109,458		108,964
Loans to bank subsidiary	0		0
Loans to nonbank subsidiary	600		559
Loans and Leases Receivable, Allowance	(1,009)		(982)
Loans and Leases Receivable, Net Amount	109,049		108,541
Property Subject to or Available for Operating Lease, Net	12,639		16,190
Receivables from bank subsidiary	0		0
Receivables from nonbank subsidiary	127		282
Investment in bank subsidiaries	0		0
Investment in nonbank subsidiaries	0		0
Premiums receivable and other insurance assets	1,906		1,827
Other assets	4,681		4,488
Assets	150,796		154,185
Noninterest-bearing deposit liabilities	101		89
Interest-bearing deposit liabilities	75,450		66,160
Deposits	75,551		66,249
Short-term Debt	2,909		4,648
Long-term debt	34,572		45,186
Debt Payable To Bank Subsidiaries	0
Debt Payable To Nonbank Subsidiaries	1,993		3,877
Payables to Bank Subsidiaries	0		0
Payables to Nonbank Subsidiaries	(29)		191
Interest payable	215		92
Unearned Premiums	2,493		2,434
Accounts Payable and Accrued Liabilities	4,133		4,028
Liabilities	121,837		126,705
Stockholders' Equity Attributable to Parent, Total	28,959		27,480
Liabilities and Equity	150,796		154,185
Affiliated Entity [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	779		850
Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and Due from Banks	0		0
Interest-bearing Deposits in Banks and Other Financial Institutions	0		0
Cash and Cash Equivalents, at Carrying Value	(779)		(850)	$ (722)		$ (615)
Available-for-sale securities	(329)		0
Held-to-maturity securities	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	0		0
Loans and Leases Receivable, Gross	0		0
Loans to bank subsidiary	(300)		(600)
Loans to nonbank subsidiary	(2,293)		(3,836)
Loans and Leases Receivable, Allowance	0		0
Loans and Leases Receivable, Net Amount	(2,593)		(4,436)
Property Subject to or Available for Operating Lease, Net	0		0
Receivables from bank subsidiary	(343)		(186)
Receivables from nonbank subsidiary	(217)		(541)
Investment in bank subsidiaries	(35,164)		(32,992)
Investment in nonbank subsidiaries	(11,379)		(10,913)
Premiums receivable and other insurance assets	(25)		(26)
Other assets	(2,808)		(2,952)
Assets	(53,637)		(52,896)
Noninterest-bearing deposit liabilities	0		0
Interest-bearing deposit liabilities	0		0
Deposits	0		0
Short-term Debt	0		0
Long-term debt	0		0
Debt Payable To Bank Subsidiaries	(330)
Debt Payable To Nonbank Subsidiaries	(3,372)		(5,286)
Payables to Bank Subsidiaries	(436)		(142)
Payables to Nonbank Subsidiaries	(150)		(611)
Interest payable	0		0
Unearned Premiums	0		0
Accounts Payable and Accrued Liabilities	(2,807)		(2,952)
Liabilities	(7,095)		(8,991)
Stockholders' Equity Attributable to Parent, Total	(46,542)		(43,905)
Liabilities and Equity	(53,637)		(52,896)
Consolidation, Eliminations [Member] | Affiliated Entity [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ (779)		$ (850)

XML

Parent and Guarantor Consolidating Financial Statements (Schedule of Condensed Consolidating Statement of Cash Flows) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 3,589	$ 3,970
Payments to Acquire Available-for-sale Securities	(11,027)	(10,011)
Proceeds from sales of available-for-sale securities	8,546	4,408
Proceeds from maturities and repayment of available-for-sale securities	2,411	3,141
Payments to Acquire Held-to-maturity Securities	(650)	0
Payments for (Proceeds from) Loans and Leases	(8,308)	(9,175)
Proceeds from Sale of Loans Held-for-sale	4,221	2,665
Purchases of operating lease assets	(2,360)	(3,423)
Disposals of operating lease assets	4,631	3,855
Payments to Acquire Interest in Subsidiaries and Affiliates	(309)	0
Capital contributions to subsidiaries	0	0
Returns of contributed capital	0	0
Proceeds from Divestiture of Businesses	0	1,049
Increase (Decrease) in Restricted Cash	622	489
Increase (Decrease) in Non marketable equity securities	(401)	(42)
Payments for (Proceeds from) Other Investing Activities	(157)	25
Net cash provided by investing activities	(2,781)	(7,019)
Proceeds from (Repayments of) Short-term Debt	(1,673)	(1,692)
Increase (Decrease) in Deposits	9,240	5,797
Proceeds from issuance of long-term debt	11,229	23,866
Repayments of long-term debt	(20,758)	(23,454)
Net Change in Debt, Intercompany	0	0
Payments for Repurchase of Redeemable Preferred Stock	(696)	(442)
Payments for Repurchase of Common Stock	(173)	(16)
Payments of Dividends	(70)	(1,356)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash (used in) provided by financing activities	(2,901)	2,703
Effect of exchange-rate changes on cash and cash equivalents	2	(3)
Cash and Cash Equivalents, Period Increase (Decrease)	(2,091)	(349)
Cash and Cash Equivalents, at Carrying Value	6,380	5,576
Cash and Cash Equivalents, at Carrying Value	4,289	5,227
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	709	67
Payments to Acquire Available-for-sale Securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities and repayment of available-for-sale securities	0	0
Payments to Acquire Held-to-maturity Securities	0
Payments for (Proceeds from) Loans and Leases	934	398
Proceeds from Sale of Loans Held-for-sale	0	0
Purchases of operating lease assets	0	(94)
Disposals of operating lease assets	16	0
Payments to Acquire Interest in Subsidiaries and Affiliates	(309)
Capital contributions to subsidiaries	3,112	228
Returns of contributed capital	2,168	881
Proceeds from Divestiture of Businesses		1,049
Increase (Decrease) in Restricted Cash	(136)	(12)
Increase (Decrease) in Non marketable equity securities	0	0
Payments for (Proceeds from) Other Investing Activities	(156)	(29)
Net cash provided by investing activities	1,193	4,357
Proceeds from (Repayments of) Short-term Debt	72	120
Increase (Decrease) in Deposits	(36)	(72)
Proceeds from issuance of long-term debt	1,084	4,037
Repayments of long-term debt	(2,279)	(5,866)
Net Change in Debt, Intercompany	(30)	(1,117)
Payments for Repurchase of Redeemable Preferred Stock	(696)	(442)
Payments for Repurchase of Common Stock	(173)	(16)
Payments of Dividends	(70)	(1,356)
Dividends paid and returns of contributed capital, Intercompany	0	0
Capital contributions from parent	0	0
Net cash (used in) provided by financing activities	(2,128)	(4,712)
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	(226)	(288)
Cash and Cash Equivalents, at Carrying Value	1,635	2,286
Cash and Cash Equivalents, at Carrying Value	1,409	1,998
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	0	525
Payments to Acquire Available-for-sale Securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities and repayment of available-for-sale securities	0	0
Payments to Acquire Held-to-maturity Securities	0
Payments for (Proceeds from) Loans and Leases	0	0
Proceeds from Sale of Loans Held-for-sale	0	0
Purchases of operating lease assets	0	0
Disposals of operating lease assets	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Capital contributions to subsidiaries	0	(1)
Returns of contributed capital	8	0
Proceeds from Divestiture of Businesses		0
Increase (Decrease) in Restricted Cash	0	0
Increase (Decrease) in Non marketable equity securities	0	0
Payments for (Proceeds from) Other Investing Activities	0	0
Net cash provided by investing activities	8	(1)
Proceeds from (Repayments of) Short-term Debt	0	0
Increase (Decrease) in Deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	0	0
Payments for Repurchase of Redeemable Preferred Stock	0	0
Payments for Repurchase of Common Stock	0	0
Payments of Dividends	0	0
Dividends paid and returns of contributed capital, Intercompany	(8)	(525)
Capital contributions from parent	0	1
Net cash (used in) provided by financing activities	(8)	(524)
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Cash and Cash Equivalents, at Carrying Value	0	0
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	3,782	5,408
Payments to Acquire Available-for-sale Securities	(11,027)	(10,011)
Proceeds from sales of available-for-sale securities	8,546	4,408
Proceeds from maturities and repayment of available-for-sale securities	2,411	3,141
Payments to Acquire Held-to-maturity Securities	(650)
Payments for (Proceeds from) Loans and Leases	(9,242)	(9,573)
Proceeds from Sale of Loans Held-for-sale	4,221	2,665
Purchases of operating lease assets	(2,360)	(3,329)
Disposals of operating lease assets	4,615	3,855
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Capital contributions to subsidiaries	0	1
Returns of contributed capital	0	0
Proceeds from Divestiture of Businesses		0
Increase (Decrease) in Restricted Cash	758	501
Increase (Decrease) in Non marketable equity securities	(401)	(42)
Payments for (Proceeds from) Other Investing Activities	(103)	54
Net cash provided by investing activities	(3,273)	(7,105)
Proceeds from (Repayments of) Short-term Debt	(1,745)	(1,812)
Increase (Decrease) in Deposits	9,276	5,869
Proceeds from issuance of long-term debt	10,145	19,829
Repayments of long-term debt	(18,479)	(17,588)
Net Change in Debt, Intercompany	(1,788)	(2,393)
Payments for Repurchase of Redeemable Preferred Stock	0	0
Payments for Repurchase of Common Stock	0	0
Payments of Dividends	0	0
Dividends paid and returns of contributed capital, Intercompany	(2,968)	(2,386)
Capital contributions from parent	3,112	227
Net cash (used in) provided by financing activities	(2,447)	1,746
Effect of exchange-rate changes on cash and cash equivalents	2	(3)
Cash and Cash Equivalents, Period Increase (Decrease)	(1,936)	46
Cash and Cash Equivalents, at Carrying Value	5,595	3,905
Cash and Cash Equivalents, at Carrying Value	3,659	3,951
Affiliated Entity [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments for (Proceeds from) Loans and Leases	0	0
Affiliated Entity [Member] | Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments for (Proceeds from) Loans and Leases	1,788	2,392
Affiliated Entity [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments for (Proceeds from) Loans and Leases	0	0
Affiliated Entity [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments for (Proceeds from) Loans and Leases	(41)	1,225
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(902)	(2,030)
Payments to Acquire Available-for-sale Securities	0	0
Proceeds from sales of available-for-sale securities	0	0
Proceeds from maturities and repayment of available-for-sale securities	0	0
Payments to Acquire Held-to-maturity Securities	0
Payments for (Proceeds from) Loans and Leases	0	0
Proceeds from Sale of Loans Held-for-sale	0	0
Purchases of operating lease assets	0	0
Disposals of operating lease assets	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	0
Capital contributions to subsidiaries	(3,112)	(228)
Returns of contributed capital	(2,176)	(881)
Proceeds from Divestiture of Businesses		0
Increase (Decrease) in Restricted Cash	0	0
Increase (Decrease) in Non marketable equity securities	0	0
Payments for (Proceeds from) Other Investing Activities	102	0
Net cash provided by investing activities	(709)	(4,270)
Proceeds from (Repayments of) Short-term Debt	0	0
Increase (Decrease) in Deposits	0	0
Proceeds from issuance of long-term debt	0	0
Repayments of long-term debt	0	0
Net Change in Debt, Intercompany	1,818	3,510
Payments for Repurchase of Redeemable Preferred Stock	0	0
Payments for Repurchase of Common Stock	0	0
Payments of Dividends	0	0
Dividends paid and returns of contributed capital, Intercompany	2,976	2,911
Capital contributions from parent	(3,112)	(228)
Net cash (used in) provided by financing activities	1,682	6,193
Effect of exchange-rate changes on cash and cash equivalents	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	71	(107)
Cash and Cash Equivalents, at Carrying Value	(850)	(615)
Cash and Cash Equivalents, at Carrying Value	(779)	(722)
Consolidation, Eliminations [Member] | Affiliated Entity [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Payments for (Proceeds from) Loans and Leases	$ (1,747)	$ (3,617)

XML

Contingencies and Other Risks (Details) - USD ($) $ in Millions	3 Months Ended	45 Months Ended
	Dec. 31, 2016	Sep. 30, 2016
Loss Contingencies [Line Items]
Consent Order Fees and Expenses		$ 230
Loss Contingency Accrual		$ 52
Subsequent Event [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Consent Order Fees and Expenses	$ 10
Subsequent Event [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Consent Order Fees and Expenses	$ 15

XML

Subsequent Events (Details)	3 Months Ended
	Sep. 30, 2016 USD ($)
Subsequent Events [Abstract]
Dividends	$ 0.08