Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 3,257	$ 2,415	$ 2,442
Adjustments to reconcile net income to net cash from operating activities:
Provision for credit losses	566	547	572
Depreciation	424	408	405
Loss (gain) on early extinguishment of debt	0	392	(1)
Amortization of intangibles	131	142	150
Equity-based compensation expense	141	132	115
(Gain) loss on securities, net	(3)	1	(46)
Net change in operating assets and liabilities:
LHFS	188	618	(644)
Trading and equity securities	(134)	115	432
Other assets, accounts payable and other liabilities	(19)	(15)	(18)
Other, net	(202)	(120)	(292)
Net cash from operating activities	4,349	4,635	3,115
Cash Flows From Investing Activities:
Proceeds from sales of AFS securities	383	4,934	4,612
Proceeds from maturities, calls and paydowns of AFS securities	3,674	4,800	5,888
Purchases of AFS securities	(4,722)	(7,397)	(10,033)
Proceeds from maturities, calls and paydowns of HTM securities	2,442	2,580	7,022
Purchases of HTM securities	(39)	(8,965)	(5,124)
Originations and purchases of loans and leases, net of principal collected	(6,266)	(1,230)	(2,986)
Net cash received (paid) for acquisitions and divestitures	(296)	0	(726)
Other, net	(123)	(149)	371
Net cash from investing activities	(4,947)	(5,427)	(976)
Cash Flows From Financing Activities:
Net change in deposits	3,838	(2,842)	4,507
Net change in short-term borrowings	240	3,532	(3,581)
Proceeds from issuance of long-term debt	2,769	8,883	3,878
Repayment of long-term debt	(2,533)	(7,453)	(5,849)
Repurchase of common stock	(1,205)	(1,613)	(520)
Net proceeds from preferred stock issued	0	0	450
Cash dividends paid on common stock	(1,204)	(1,005)	(925)
Cash dividends paid on preferred stock	(174)	(174)	(167)
Other, net	(229)	123	325
Net cash from financing activities	1,502	(549)	(1,882)
Net Change in Cash, Cash Equivalents and Restricted Cash	904	(1,341)	257
Cash and Cash Equivalents at Beginning of Period	3,083	4,424	4,167
Cash, Cash Equivalents and Restricted Cash at End of Period	3,987	3,083	4,424
Supplemental Disclosure of Cash Flow Information:
Net cash paid (received) during the period for interest expense	1,408	819	775
Net cash paid (received) during the period for income taxes	99	429	844
Noncash investing activities:
Transfers of loans to foreclosed assets	247	260	258
Transfer of loans HFI to LHFS	77	1,050	263
Stock issued in business combinations	$ 0	$ 0	$ 1,063