Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017
Cash Flows from Operating Activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ 2,124		$ 1,540	[1],[2]
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation, Amortization and Accretion, Net		535		540
Payments to Acquire Mortgage Servicing Rights (MSR)		(260)		(262)
Provisions For Credit Losses And Foreclosed Properties		130		336
Stock Option Compensation And Amortization Of Restricted Stock Compensation		118		121
Debt and Equity Securities, Gain (Loss)		(1)	[3]	(1)	[4]
Gain (Loss) on Sale of Loans and Leases		(83)		(183)
Net decrease/(increase) in loans held for sale		382		1,488
Net decrease/(increase) in Debt Securities, Trading, and Equity Securities, FV-NI		(818)		(272)
Net decrease/(increase) in other assets	[5]	(1,713)		(835)
Net increase/(decrease) in Other Operating Liabilities		478		(267)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations		892		2,205
Cash Flows from Investing Activities:
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale		2,840		3,169
Proceeds from Sale of Available-for-sale Securities		2,047		1,486
Payments to Acquire Available-for-sale Securities		(5,534)		(5,344)
Proceeds from (payments for) Originations and Purchases of Loans Held-for-investment		(4,566)		(1,839)
Proceeds from sales of loans		199		520
Payments for (Proceeds from) Mortgage Servicing Rights		(73)		0
Payment to Acquire Life Insurance Policy, Investing Activities	[5]	(201)		(127)
Proceeds from Life Insurance Policy	[5]	8		3
Capital expenditures		(170)		(233)
Proceeds from Sale of Other Real Estate		148		183
Payments for (Proceeds from) Other Investing Activities	[5]	1		9
Net Cash Provided by (Used in) Investing Activities, Continuing Operations		(5,301)		(2,173)
Cash Flows from Financing Activities:
Net (decrease)/increase in total deposits		(402)		2,339
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings		3,159		685
Proceeds from Issuance of Long-term Debt		5,111		2,623
Repayment of long-term debt		(484)		(3,073)
Proceeds from Issuance of Preferred Stock and Preference Stock		0		743
Payments for Repurchase of Preferred Stock and Preference Stock		(450)		0
Payments for Repurchase of Common Stock		(1,160)		(984)
Common and preferred dividends paid		(664)		(485)
Payments Related to Tax Withholding for Share-based Compensation		(44)		(38)
Proceeds from the exercise of stock options		36		13
Net Cash Provided by (Used in) Financing Activities, Continuing Operations		5,102		1,823
Cash and Cash Equivalents, Period Increase (Decrease)		693		1,855
Cash and cash equivalents		6,912		6,423
Cash and cash equivalents		7,605		8,278
Supplemental Disclosures:
Transfer of Loans Held-for-sale to Portfolio Loans		23		16
Transfer of Portfolio Loans and Leases to Held-for-sale		449		218
Transfer to Other Real Estate		44		43
Non-cash impact of debt acquired by purchaser in leverage lease sale		$ 0		$ 9

[1] During the fourth quarter of 2017, the Company sold PAC, the results of which were previously reported within the Wholesale business segment. For all periods prior to January 1, 2018, PAC's financial results, including the gain on sale, have been transferred to Corporate Other for enhanced comparability of the Wholesale business segment excluding PAC.

[2] During the second quarter of 2018, certain of the Company's business banking clients were transferred from the Wholesale business segment to the Consumer business segment. For all periods prior to the second quarter of 2018, the corresponding financial results have been transferred to the Consumer business segment for comparability purposes.

[3] Amounts are presented in accordance with ASC Topic 606, Revenue from Contracts with Customers, except for out of scope amounts.

[4] Amounts for periods prior to January 1, 2018 are presented in accordance with ASC Topic 605, Revenue Recognition, and have not been restated to conform with ASC Topic 606, Revenue from Contracts with Customers.

[5] Related to the Company's adoption of ASU 2016-15, certain prior period amounts have been retrospectively reclassified between operating activities and investing activities. See Note 1, "Significant Accounting Policies," for additional information.