Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 5,346	$ 5,388	$ 3,985
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for credit losses	408	441	433
Depreciation and amortization	1,129	1,117	1,193
Deferred income taxes	133	(403)	326
Changes in fair value of mortgage servicing rights	172	323	179
Gain on sales of Visa Class B common shares			(126)
Undistributed earnings of BlackRock	(525)	(727)	(361)
Net change in
Trading securities and other short-term investments	(893)	305	(1,167)
Loans held for sale	1,635	(1,148)	(935)
Other assets	108	647	(744)
Accrued expenses and other liabilities	295	(704)	652
Other	32	340	65
Net cash provided (used) by operating activities	7,840	5,579	3,500
Sales
Securities available for sale	7,505	5,647	3,456
Loans	1,323	2,001	1,897
Repayments/maturities
Securities available for sale	9,388	10,734	11,061
Securities held to maturity	2,447	2,948	3,209
Purchases
Securities available for sale	(23,418)	(13,605)	(19,495)
Securities held to maturity	(3,370)	(5,605)	(4,305)
Loans	(690)	(841)	(1,334)
Net change in
Federal funds sold and resale agreements	(5,837)	(245)	126
Interest-earning deposits with banks	17,702	(2,884)	4,835
Loans	(7,335)	(10,483)	(5,940)
Net cash paid for acquisition		(1,342)
Other	(1,684)	(1,220)	(817)
Net cash provided (used) by investing activities	(3,969)	(14,895)	(7,307)
Net change in
Noninterest-bearing deposits	(6,016)	(264)	1,212
Interest-bearing deposits	8,690	8,255	7,367
Federal funds purchased and repurchase agreements	392	(148)	18
Federal Home Loan Bank borrowings	1,500
Commercial paper	(100)	100
Other borrowed funds	20	459	272
Sales/issuances
Federal Home Loan Bank borrowings	9,500	11,000	1,000
Bank notes and senior debt	3,238	7,062	5,601
Subordinated debt	1,243
Other borrowed funds	500	427	165
Preferred stock			519
Common and treasury stock	69	132	151
Repayments/maturities
Federal Home Loan Bank borrowings	(10,536)	(7,512)	(3,559)
Bank notes and senior debt	(6,175)	(1,800)	(3,750)
Subordinated debt	(575)	(2,758)	(488)
Other borrowed funds	(548)	(318)	(555)
Redemption of noncontrolling interests		(1,000)
Acquisition of treasury stock	(2,877)	(2,447)	(2,062)
Preferred stock cash dividends paid	(236)	(236)	(209)
Common stock cash dividends paid	(1,601)	(1,266)	(1,061)
Net cash provided (used) by financing activities	(3,512)	9,686	4,621
Net Increase (Decrease) In Cash And Due From Banks	359	370	814
Cash and due from banks at beginning of period	5,249	4,879	4,065
Cash and due from banks at end of period	5,608	5,249	4,879
Supplemental Disclosures
Interest paid	2,835	1,743	1,317
Income taxes paid	372	72	658
Income taxes refunded	468	24	111
Non-cash Investing and Financing Items
Transfer from loans to loans held for sale, net	403	419	606
Transfer from loans to foreclosed assets	$ 193	215	$ 281
Transfer from trading securities to investment securities		$ 192