Consolidated Statements of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ 1,898	$ 2,124
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation, Amortization and Accretion, Net		518	535
Payments to Acquire Mortgage Servicing Rights (MSR)		(251)	(260)
Provisions For Credit Losses And Foreclosed Properties		418	130
Stock Option Compensation And Amortization Of Restricted Stock Compensation		112	118
Debt and Equity Securities, Gain (Loss)		38	(1)
Gain (Loss) on Sale of Loans, Leases, and Other Assets		(266)	(83)
Net decrease/(increase) in loans held for sale		(315)	382
Net decrease/(increase) in Debt Securities, Trading, and Equity Securities, FV-NI		(1,598)	(818)
Net decrease/(increase) in other assets	[1]	(382)	(1,713)
Net increase/(decrease) in Other Operating Liabilities		(166)	478
Net cash provided by (used in) operating activities		6	892
Cash Flows from Investing Activities:
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale		3,316	2,840
Proceeds from Sale of Available-for-sale Securities		3,690	2,047
Payments to Acquire Available-for-sale Securities		(5,824)	(5,534)
Proceeds from (payments for) Originations and Purchases of Loans and Leases Held-for-investment	[1]	7,957	4,566
Proceeds from Sale of Loans Held-for-investment		866	199
Payments for (Proceeds from) Mortgage Servicing Rights		(3)	(73)
Payment to Acquire Life Insurance Policy, Investing Activities		(1)	(201)
Proceeds from Life Insurance Policy		17	8
Proceeds from Insurance Settlement, Investing Activities		210	0
Capital expenditures		(261)	(170)
Proceeds from Sale of Other Real Estate		88	148
Payments for (Proceeds from) Other Investing Activities		2	1
Net Cash Provided by (Used in) Investing Activities		(5,857)	(5,301)
Cash Flows from Financing Activities:
Net (decrease)/increase in total deposits		5,082	(402)
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings		(1,628)	3,159
Proceeds from Issuance of Long-term Debt		5,992	5,111
Repayment of long-term debt		(864)	(484)
Payments for Repurchase of Preferred Stock and Preference Stock		0	(450)
Payments for Repurchase of Common Stock		(250)	(1,160)
Common and preferred dividends paid		(747)	(664)
Payment, Tax Withholding, Share-based Payment Arrangement		(52)	(44)
Proceeds from the exercise of stock options		7	36
Net Cash Provided by (Used in) Financing Activities		7,540	5,102
Cash and Cash Equivalents, Period Increase (Decrease)		1,689	693
Cash and cash equivalents		7,495	6,912
Cash and cash equivalents		9,184	7,605
Supplemental Disclosures:
Transfer of Loans Held-for-sale to Portfolio Loans		17	23
Transfer of Portfolio Loans and Leases to Held-for-sale		812	449
Transfer to Other Real Estate		33	44
Non-cash impact of debt acquired by purchaser in leverage lease sale		163	$ 0
Interest Received from Sales-Type and Direct Financing Leases		$ 106

[1] Pursuant to the Company’s adoption of ASU 2016-02 on January 1, 2019, it began including the interest portion of lessee payments received from sales-type and direct financing leases, which totaled $106 million for the nine months ended September 30, 2019, within operating activities, with the principal portion of lessee payments remaining within investing activities. For periods prior to January 1, 2019, interest payments were not retrospectively reclassified and remain within investing activities. See Note 1, “Significant Accounting Policies,” for additional information.