Fair Value Election and Measurement (Tables)

12 Months Ended

Dec. 31, 2017

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Recurring Fair Value Measurements

The following tables present certain information regarding assets and liabilities measured at fair value on a recurring basis and the changes in fair value for those specific financial instruments for which fair value has been elected.



	December 31, 2017
	Fair Value Measurements
(Dollars in millions)	Level 1		Level 2		Level 3		Netting Adjustments ¹			Assets/Liabilities at Fair Value
Assets
Trading assets and derivative instruments:
U.S. Treasury securities		$157		$—		$—		$—			$157
Federal agency securities	—		395		—		—			395
U.S. states and political subdivisions	—		61		—		—			61
MBS - agency	—		700		—		—			700
Corporate and other debt securities	—		655		—		—			655
CP	—		118		—		—			118
Equity securities	56		—		—		—			56
Derivative instruments	395		3,493		16		(3,102		)	802
Trading loans	—		2,149		—		—			2,149
Total trading assets and derivative instruments	608		7,571		16		(3,102		)	5,093

Securities AFS:
U.S. Treasury securities	4,331		—		—		—			4,331
Federal agency securities	—		259		—		—			259
U.S. states and political subdivisions	—		617		—		—			617
MBS - agency residential	—		22,704		—		—			22,704
MBS - agency commercial	—		2,086		—		—			2,086
MBS - non-agency residential	—		—		59		—			59
MBS - non-agency commercial	—		866		—		—			866
ABS	—		—		8		—			8
Corporate and other debt securities	—		12		5		—			17
Other equity securities ²	51		—		418		—			469
Total securities AFS	4,382		26,544		490		—			31,416

LHFS	—		1,577		—		—			1,577
LHFI	—		—		196		—			196
Residential MSRs	—		—		1,710		—			1,710

Liabilities
Trading liabilities and derivative instruments:
U.S. Treasury securities	577		—		—		—			577
Corporate and other debt securities	—		289		—		—			289
Equity securities	9		—		—		—			9
Derivative instruments	183		4,243		16		(4,034		)	408
Total trading liabilities and derivative instruments	769		4,532		16		(4,034		)	1,283

Brokered time deposits	—		236		—		—			236
Long-term debt	—		530		—		—			530

¹Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 17, "Derivative Financial Instruments," for additional information.

² Includes $49 million of mutual fund investments, $15 million of FHLB of Atlanta stock, $403 million of Federal Reserve Bank of Atlanta stock, and $2 million of other.



	December 31, 2016
	Fair Value Measurements
(Dollars in millions)	Level 1		Level 2		Level 3		Netting Adjustments ¹			Assets/Liabilities at Fair Value
Assets
Trading assets and derivative instruments:
U.S. Treasury securities		$539		$—		$—		$—			$539
Federal agency securities	—		480		—		—			480
U.S. states and political subdivisions	—		134		—		—			134
MBS - agency	—		567		—		—			567
CLO securities	—		1		—		—			1
Corporate and other debt securities	—		656		—		—			656
CP	—		140		—		—			140
Equity securities	49		—		—		—			49
Derivative instruments	293		4,193		28		(3,530		)	984
Trading loans	—		2,517		—		—			2,517
Total trading assets and derivative instruments	881		8,688		28		(3,530		)	6,067

Securities AFS:
U.S. Treasury securities	5,405		—		—		—			5,405
Federal agency securities	—		313		—		—			313
U.S. states and political subdivisions	—		275		4		—			279
MBS - agency residential	—		22,436		—		—			22,436
MBS - agency commercial	—		1,226		—		—			1,226
MBS - non-agency residential	—		—		74		—			74
MBS - non-agency commercial	—		252		—		—			252
ABS	—		—		10		—			10
Corporate and other debt securities	—		30		5		—			35
Other equity securities ²	102		—		540		—			642
Total securities AFS	5,507		24,532		633		—			30,672

LHFS	—		3,528		12		—			3,540
LHFI	—		—		222		—			222
Residential MSRs	—		—		1,572		—			1,572

Liabilities
Trading liabilities and derivative instruments:
U.S. Treasury securities	697		—		—		—			697
MBS - agency	—		1		—		—			1
Corporate and other debt securities	—		255		—		—			255
Derivative instruments	149		4,731		22		(4,504		)	398
Total trading liabilities and derivative instruments	846		4,987		22		(4,504		)	1,351

Brokered time deposits	—		78		—		—			78
Long-term debt	—		963		—		—			963

¹ Amounts represent offsetting cash collateral received from, and paid to, the same derivative counterparties, and the impact of netting derivative assets and derivative liabilities when a legally enforceable master netting agreement or similar agreement exists. See Note 17, "Derivative Financial Instruments," for additional information.

² Includes $102 million of mutual fund investments, $132 million of FHLB of Atlanta stock, $402 million of Federal Reserve Bank of Atlanta stock, and $6 million of other.

Fair Value Option Elected, Difference Between the Aggregate Fair Value and the Aggregate Unpaid Principal Balance



(Dollars in millions)	Fair Value at December 31, 2017		Aggregate UPB at December 31, 2017		Fair Value Over/(Under) Unpaid Principal
Assets:
Trading loans		$2,149		$2,111		$38
LHFS:
Accruing	1,576		1,533		43
Past due 90 days or more	1		1		—
LHFI:
Accruing	192		198		(6		)
Nonaccrual	4		6		(2		)
Liabilities:
Brokered time deposits	236		233		3
Long-term debt	530		517		13

(Dollars in millions)	Fair Value at December 31, 2016		Aggregate UPB at December 31, 2016		Fair Value Over/(Under) Unpaid Principal
Assets:
Trading loans		$2,517		$2,488		$29
LHFS:
Accruing	3,540		3,516		24
LHFI:
Accruing	219		225		(6		)
Nonaccrual	3		4		(1		)
Liabilities:
Brokered time deposits	78		80		(2		)
Long-term debt	963		924		39

Change in Fair Value of Financial Instruments for which the FVO has been Elected



	Fair Value Gain/(Loss) for the Year Ended December 31, 2017 for Items Measured at Fair Value Pursuant to Election of the FVO
(Dollars in millions)	Trading Income		Mortgage Production Related Income ¹		Mortgage Servicing Related Income			Other Noninterest Income		Total Changes in Fair Values Included in Earnings ²
Assets:
Trading loans		$21		$—		$—			$—		$21
LHFS	—		61		—			—		61
Residential MSRs	—		5		(248		)	—		(243		)
Liabilities:
Long-term debt	21		—		—			—		21

¹Income related to LHFS does not include income from IRLCs. For the year ended December 31, 2017, income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM.

²Changes in fair value for the year ended December 31, 2017 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income.



	Fair Value Gain/(Loss) for the Year Ended December 31, 2016 for Items Measured at Fair Value Pursuant to Election of the FVO
(Dollars in millions)	Trading Income		Mortgage Production Related Income ¹		Mortgage Servicing Related Income			Other Noninterest Income		Total Changes in Fair Values Included in Earnings ²
Assets:
Trading loans		$15		$—		$—			$—		$15
LHFS	—		75		—			—		75
Residential MSRs	—		3		(245		)	—		(242		)
Liabilities:
Brokered time deposits	4		—		—			—		4
Long-term debt	27		—		—			—		27

¹Income related to LHFS does not include income from IRLCs. For the year ended December 31, 2016, income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM.

²Changes in fair value for the year ended December 31, 2016 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, brokered time deposits, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income.



	Fair Value (Loss)/Gain for the Year Ended December 31, 2015 for Items Measured at Fair Value Pursuant to Election of the FVO
(Dollars in millions)	Trading Income			Mortgage Production Related Income ¹		Mortgage Servicing Related Income			Other Noninterest Income		Total Changes in Fair Values Included in Earnings ²
Assets:
Trading loans		($1	)		$—		$—			$—		($1	)
LHFS	—			44		—			—		44
LHFI	—			—		—			5		5
Residential MSRs	—			2		(242		)	—		(240		)
Liabilities:
Long-term debt	41			—		—			—		41

¹Income related to LHFS does not include income from IRLCs. For the year ended December 31, 2015, income related to residential MSRs includes income recognized upon the sale of loans reported at LOCOM.

²Changes in fair value for the year ended December 31, 2015 exclude accrued interest for the period then ended. Interest income or interest expense on trading loans, LHFS, LHFI, and long-term debt that have been elected to be measured at fair value are recognized in Interest income or Interest expense in the Consolidated Statements of Income.

Fair Value Level 3 Significant Unobservable Input Assumptions [Table Text Block]

The valuation technique and range, including weighted average, of the unobservable inputs associated with the Company's level 3 assets and liabilities are as follows:



	Level 3 Significant Unobservable Input Assumptions
(Dollars in millions)	Fair value December 31, 2017		Valuation Technique	Unobservable Input ¹	Range (weighted average)
Assets
Trading assets and derivative instruments:
Derivative instruments, net ²		$—	Internal model	Pull through rate	41-100% (81%)
Derivative instruments, net ²		$—	Internal model	MSR value	41-190 bps (113 bps)
Securities AFS:
MBS - non-agency residential	59		Third party pricing	N/A
ABS	8		Third party pricing	N/A
Corporate and other debt securities	5		Cost	N/A
Other equity securities	418		Cost	N/A
LHFI	192		Monte Carlo/Discounted cash flow	Option adjusted spread	62-784 bps (215 bps)
				Conditional prepayment rate	2-34 CPR (11 CPR)
				Conditional default rate	0-5 CDR (0.7 CDR)
	4		Collateral based pricing	Appraised value	NM ³
Residential MSRs	1,710		Monte Carlo/Discounted cash flow	Conditional prepayment rate	6-30 CPR (13 CPR)
Residential MSRs	1,710		Monte Carlo/Discounted cash flow	Option adjusted spread	1-125% (4%)

¹For certain assets and liabilities where the Company utilizes third party pricing, the unobservable inputs and their ranges are not reasonably available, and therefore, have been noted as not applicable ("N/A").

²Amount represents the net of IRLC assets and liabilities and includes the derivative liability associated with the Company's sale of Visa shares. Refer to the "Trading Liabilities and Derivative Instruments" section herein for a discussion of valuation assumptions related to the Visa derivative liability.

³Not meaningful.



	Level 3 Significant Unobservable Input Assumptions
(Dollars in millions)	Fair value December 31, 2016		Valuation Technique	Unobservable Input ¹	Range (weighted average)
Assets
Trading assets and derivative instruments:
Derivative instruments, net ²		$6	Internal model	Pull through rate	40-100% (81%)
Derivative instruments, net ²		$6	Internal model	MSR value	22-170 bps (106 bps)
Securities AFS:
U.S. states and political subdivisions	4		Cost	N/A
MBS - non-agency residential	74		Third party pricing	N/A
ABS	10		Third party pricing	N/A
Corporate and other debt securities	5		Cost	N/A
Other equity securities	540		Cost	N/A
Residential LHFS	12		Monte Carlo/Discounted cash flow	Option adjusted spread	104-125 bps (124 bps)
				Conditional prepayment rate	2-28 CPR (7 CPR)
				Conditional default rate	0-3 CDR (0.4 CDR)
LHFI	219		Monte Carlo/Discounted cash flow	Option adjusted spread	62-784 bps (184 bps)
				Conditional prepayment rate	3-36 CPR (13 CPR)
				Conditional default rate	0-5 CDR (2.1 CDR)
	3		Collateral based pricing	Appraised value	NM ³
Residential MSRs	1,572		Monte Carlo/Discounted cash flow	Conditional prepayment rate	1-25 CPR (9 CPR)
Residential MSRs	1,572		Monte Carlo/Discounted cash flow	Option adjusted spread	0-122% (8%)

³Not meaningful.

Reconciliation of the Beginning and Ending Balances for Fair Valued Assets and Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs



	Fair Value Measurements Using Significant Unobservable Inputs
(Dollars in millions)	Beginning Balance January 1, 2017		Included in Earnings				OCI				Purchases		Sales			Settlements			Transfers to/from Other Balance Sheet Line Items			Transfers into Level 3		Transfers out of Level 3			Fair Value December 31, 2017		Included in Earnings (held at December 31, 2017 ¹)
Assets
Trading assets:
Derivative instruments, net		$6		$185		²		$—				$—		$—			$—			($191	)		$—		$—			$—		$12		²
Securities AFS:
U.S. states and political subdivisions	4		—				—				—		—			(4		)	—			—		—			—		—
MBS - non-agency residential	74		(1		)		1			³	—		—			(15		)	—			—		—			59		(1		)
ABS	10		—				1			³	—		—			(3		)	—			—		—			8		—
Corporate and other debt securities	5		—				—				—		—			—			—			—		—			5		—
Other equity securities	540		1				(1		)	³	75		(1		)	(191		)	—			—		(5		)	418		—
Total securities AFS	633		—				1			³	75		(1		)	(213		)	—			—		(5		)	490		(1		)

Residential LHFS	12		—				—				—		(25		)	(1		)	(4		)	26		(8		)	—		—
LHFI	222		—				—				—		—			(34		)	3			5		—			196		(1		)	⁴

¹ Change in unrealized gains/(losses) included in earnings during the period related to financial assets still held at December 31, 2017.

² Includes issuances, fair value changes, and expirations. Amount related to residential IRLCs is recognized in Mortgage production related income, amount related to commercial IRLCs is recognized in Commercial real estate related income, and amount related to Visa derivative liability is recognized in Other noninterest expense.

³ Amounts recognized in OCI are included in change in net unrealized gains on securities AFS, net of tax.

⁴ Amounts are generally included in Mortgage production related income; however, the mark on certain fair value loans is included in Other noninterest income.



	Fair Value Measurements Using Significant Unobservable Inputs
(Dollars in millions)	Beginning Balance January 1, 2016		Included in Earnings				OCI			Purchases		Sales			Settlements			Transfers to/from Other Balance Sheet Line Items			Transfers into Level 3		Transfers out of Level 3			Fair Value December 31, 2016		Included in Earnings (held at December 31, 2016 ¹)
Assets
Trading assets:
Corporate and other debt securities		$89		($1	)	²		$—			$—		($88	)		$—			$—			$—		$—			$—		$—
Derivative instruments, net	15		198			³	—			2		—			2			(211		)	—		—			6		7			³
Total trading assets	104		197				—			2		(88		)	2			(211		)	—		—			6		7
Securities AFS:
U.S. states and political subdivisions	5		—				—			—		—			(1		)	—			—		—			4		—
MBS - non-agency residential	94		—				1		⁴	—		—			(21		)	—			—		—			74		—
ABS	12		—				1		⁴	—		—			(3		)	—			—		—			10		—
Corporate and other debt securities	5		—				—			—		—			—			—			—		—			5		—
Other equity securities	440		—				—			308		—			(208		)	—			—		—			540		—
Total securities AFS	556		—				2		⁴	308		—			(233		)	—			—		—			633		—

Residential LHFS	5		(1		)	⁵	—			—		(35		)	—			(5		)	52		(4		)	12		(1		)	⁵
LHFI	257		(2		)	⁵	—			—		—			(44		)	1			10		—			222		(2		)	⁵
Liabilities
Other liabilities	23		—				—			—		—			(23		)	—			—		—			—		—

¹ Change in unrealized gains/(losses) included in earnings during the period related to financial assets/liabilities still held at December 31, 2016.

² Amounts included in earnings are recognized in Trading income.

³ Includes issuances, fair value changes, and expirations. Amount related to residential IRLCs is recognized in Mortgage production related income and amount related to Visa derivative liability is recognized in Other noninterest expense.

⁴ Amounts recognized in OCI are included in change in net unrealized gains/(losses) on securities AFS, net of tax.

⁵ Amounts are generally included in Mortgage production related income; however, the mark on certain fair value loans is included in Other noninterest income.

Change in Carrying Value of Assets Measured at Fair Value on a Non-Recurring Basis



			Fair Value Measurements						Losses for the Year Ended December 31, 2017
(Dollars in millions)	December 31, 2017		Level 1		Level 2		Level 3		Losses for the Year Ended December 31, 2017
LHFS		$13		$—		$13		$—		$—
LHFI	49		—		—		49		—
OREO	24		—		1		23		(4		)
Other assets	53		—		4		49		(43		)

			Fair Value Measurements						Losses for the Year Ended December 31, 2016
(Dollars in millions)	December 31, 2016		Level 1		Level 2		Level 3		Losses for the Year Ended December 31, 2016
LHFI		$75		$—		$—		$75		$—
OREO	17		—		—		17		(2		)
Other assets	112		—		58		54		(36		)

Carrying Amounts and Fair Values of the Company's Financial Instruments



	December 31, 2017				Fair Value Measurements
(Dollars in millions)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Financial assets:
Cash and cash equivalents		$6,912		$6,912		$6,912		$—		$—	(a)
Trading assets and derivative instruments	5,093		5,093		608		4,469		16		(b)
Securities AFS	31,416		31,416		4,382		26,544		490		(b)
LHFS	2,290		2,293		—		2,239		54		(c)
LHFI, net	141,446		141,575		—		—		141,575		(d)
Financial liabilities:
Deposits	160,780		160,586		—		160,586		—		(e)
Short-term borrowings	4,781		4,781		—		4,781		—		(f)
Long-term debt	9,785		9,892		—		8,834		1,058		(f)
Trading liabilities and derivative instruments	1,283		1,283		769		498		16		(b)



	December 31, 2016				Fair Value Measurements
(Dollars in millions)	Carrying Amount		Fair Value		Level 1		Level 2		Level 3
Financial assets:
Cash and cash equivalents		$6,423		$6,423		$6,423		$—		$—	(a)
Trading assets and derivative instruments	6,067		6,067		881		5,158		28		(b)
Securities AFS	30,672		30,672		5,507		24,532		633		(b)
LHFS	4,169		4,178		—		4,161		17		(c)
LHFI, net	141,589		140,516		—		282		140,234		(d)
Financial liabilities:
Deposits	160,398		160,280		—		160,280		—		(e)
Short-term borrowings	4,764		4,764		—		4,764		—		(f)
Long-term debt	11,748		11,779		—		11,051		728		(f)
Trading liabilities and derivative instruments	1,351		1,351		846		483		22		(b)

The following methods and assumptions were used by the Company in estimating the fair value of financial instruments:


(a)	Cash and cash equivalents are valued at their carrying amounts, which are reasonable estimates of fair value due to the relatively short period to maturity of the instruments.


(b)	Trading assets and derivative instruments, securities AFS, and trading liabilities and derivative instruments that are classified as level 1 are valued based on quoted prices observed in active markets. For those instruments classified as level 2 or 3, refer to the respective valuation discussions within this footnote.

(c)

LHFS are generally valued based on observable current market prices or, if quoted market prices are not available, quoted market prices of similar instruments. Refer to the LHFS section within this footnote for further discussion. When valuation assumptions are not readily observable in the market, instruments are valued based on the best available data to approximate fair value. This data may be internally developed and considers risk premiums that a market participant would require under then-current market conditions.

(d)

LHFI fair values are based on a hypothetical exit price, which does not represent the estimated intrinsic value of the loan if held for investment. The assumptions used are expected to approximate those that a market participant purchasing the loans would use to value the loans, including a market risk premium and liquidity discount. Estimating the fair value of the loan portfolio when loan sales and trading markets are illiquid or nonexistent requires significant judgment.

Generally, the Company measures fair value for LHFI based on estimated future discounted cash flows using current origination rates for loans with similar terms and credit quality, which derived an estimated value of 101% on the loan portfolio’s net carrying value at both December 31, 2017 and 2016. The value derived from origination rates likely does not represent an exit price; therefore, an incremental market risk and liquidity discount was applied when estimating the fair value of these loans. The discounted value is a function of a market participant’s required yield in the current environment and is not a reflection of the expected cumulative losses on the loans.

(e)

Deposit liabilities with no defined maturity such as DDAs, NOW/money market accounts, and savings accounts have a fair value equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). Fair values for CDs are estimated using a discounted cash flow approach that applies current interest rates to a schedule of aggregated expected maturities. The assumptions used in the discounted cash flow analysis are expected to approximate those that market participants would use in valuing deposits. The value of long-term relationships with depositors is not taken into account in estimating fair values. Refer to the respective valuation section within this footnote for valuation information related to brokered time deposits that the Company measures at fair value as well as those that are carried at amortized cost.

(f)

Fair values for short-term borrowings and certain long-term debt are based on quoted market prices for similar instruments or estimated discounted cash flows utilizing the Company’s current incremental borrowing rate for similar types of instruments. Refer to the respective valuation section within this footnote for valuation information related to long-term debt that the Company measures at fair value. For level 3 debt, the terms are unique in nature or there are no similar instruments that can be used to value the instrument without using significant unobservable assumptions.

- Definition

Tabular disclosure of the application of the fair value option for measurement and reporting of eligible financial assets and liabilities (as defined), as well as certain other eligible items (as defined) included in the statement of financial position, whether such option is elected for a single eligible item or a group of similar eligible items and is in addition to other disclosures concerning fair value which the company may be required to provide. Such disclosure might be expected to include: (1) for items included in the statement of financial position: (a) the reasons for electing a fair value option for each eligible item or group of similar eligible items and (b) if the fair value option is elected for some but not all eligible items within a group of similar eligible items: (i) a description of those similar items and the reasons for partial election and (ii) information of how the group of similar items relates to individual balance sheet line items; (c) for each line item in the statement of financial position that includes an item or items for which the fair value option has been elected, information of how each line item in the statement of financial position relates to major categories of assets and liabilities presented in accordance with other fair value disclosures; (2) for items included in the income statement: (a) a description of how interest and dividends are measured and where they are reported in the income statement; (b) how the gains or losses attributable to changes in instrument-specific credit risk were determined; (c) for liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk: (i) qualitative information about the reasons for the changes and (ii) how the gains and losses attributable to changes in instrument-specific credit risk were determined; and (3) certain other disclosures as required or determined to be provided.

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- Definition

Tabular disclosure of the application of the fair value option for measurement and reporting of eligible financial assets and liabilities (as defined), as well as certain other eligible items (as defined) included in the statement of financial position, whether such option is elected for a single eligible item or a group of similar eligible items and is in addition to other disclosures concerning fair value which the company may be required to provide. Such disclosure might be expected to include: (1) for items included in the statement of financial position: (a) for each line item in the statement of financial position that includes an item or items for which the fair value option has been elected, provide the aggregate carrying amount of ineligible items included in each line item in the balance sheet, if any; (b) the difference between the aggregate fair value and the aggregate unpaid principal balance (assuming contractual principal amounts and fair value option elected) of: (i) loans and long-term receivables (other than securities otherwise reported at fair value) and (ii) long-term debt instruments; (c) for loans held as assets for which the fair value option has been elected: (i) the aggregate fair value of loans that are 90 days or more past due, (ii) if the policy is to recognize interest income separately from other changes in fair value, the aggregate fair value of loans in nonaccrual status, and (iii) the difference between the aggregate fair value and the aggregate unpaid principal balance for loans that are 90 days or more past due, in nonaccrual status, or both; (2) for items included in the income statement: (a) the amounts of gains and losses from fair value changes included in earnings and in which line in the income statement those gains and losses are reported whether or not combined with gains and losses from items required to be accounted for at fair value; (b) for loans and other receivables held as assets, the estimated amount of gains or losses included in earnings attributable to changes in instrument-specific credit risk; (c) for liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk, the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk; and (3) certain other disclosures as required or determined to be provided.

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