Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net income	$ 1,826	$ 915
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for (recapture of) credit losses	(551)	914
Depreciation and amortization	375	328
Deferred income taxes	(138)	(226)
Changes in fair value of mortgage servicing rights	(323)	620
Undistributed earnings of BlackRock		(56)
Net change in
Trading securities and other short-term investments	564	(1,014)
Loans held for sale	(342)	(452)
Other assets	(822)	(6,912)
Accrued expenses and other liabilities	245	5,376
Other	(54)	(189)
Net cash provided (used) by operating activities	780	(696)
Sales
Securities available for sale	5,558	5,447
Loans	406	314
Repayments/maturities
Securities available for sale	7,263	4,332
Securities held to maturity	14	12
Purchases
Securities available for sale	(22,094)	(11,889)
Securities held to maturity	(21)	(4)
Loans	(778)	(100)
Net change in
Federal funds sold and resale agreements	(136)	965
Interest-earning deposits with banks	(988)	3,427
Loans	5,043
Loans		(25,758)
Other	(339)	(125)
Net cash provided (used) by investing activities	(6,072)	(23,379)
Net change in
Noninterest-bearing deposits	8,096	8,857
Interest-bearing deposits	1,718	7,829
Federal funds purchased and repurchase agreements	(3)	2,306
Short-term Federal Home Loan Bank borrowings		(400)
Other borrowed funds	168	1,044
Sales/issuances
Federal Home Loan Bank borrowings		9,060
Bank notes and senior debt		3,486
Other borrowed funds	188	172
Common and treasury stock	27	23
Repayments/maturities
Federal Home Loan Bank borrowings	(2,000)	(1,510)
Bank notes and senior debt	(1,650)	(2,100)
Other borrowed funds	(198)	(172)
Acquisition of treasury stock	(66)	(1,522)
Preferred stock cash dividends paid	(57)	(63)
Common stock cash dividends paid	(493)	(503)
Net cash provided (used) by financing activities	5,730	26,507
Net Increase (Decrease) In Cash And Due From Banks And Restricted Cash	438	2,432
Net cash provided by discontinued operations		126
Net cash provided (used) by continuing operations	438	2,306
Cash and due from banks and restricted cash at beginning of period	7,017	5,061
Cash and due from banks and restricted cash at end of period	7,455	7,493
Cash and due from banks at end of period (unrestricted cash)	6,698	7,161
Restricted cash	757	332
Supplemental Disclosures
Interest paid	188	638
Income taxes paid	15	36
Income taxes refunded	4	5
Leased assets obtained in exchange for new operating lease liabilities	12	57
Non-cash Investing and Financing Items
Transfer from loans to loans held for sale, net	344	313
Transfer from loans to foreclosed assets	$ 7	$ 37