Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net income	$ 915	$ 1,271
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for credit losses	914	189
Depreciation and amortization	328	272
Deferred income taxes	(226)	111
Changes in fair value of mortgage servicing rights	620	210
Undistributed earnings of BlackRock	(56)	(111)
Net change in
Trading securities and other short-term investments	(1,014)	358
Loans held for sale	(452)	320
Other assets	(6,912)	(2,931)
Accrued expenses and other liabilities	5,376	1,796
Other	(189)	(84)
Net cash provided (used) by operating activities	(696)	1,401
Sales
Securities available for sale	5,447	840
Loans	314	306
Repayments/maturities
Securities available for sale	4,332	2,103
Securities held to maturity	12	510
Purchases
Securities available for sale	(11,889)	(3,861)
Securities held to maturity	(4)	(23)
Loans	(100)	(468)
Net change in
Federal funds sold and resale agreements	965	4,810
Interest-earning deposits with banks	3,427	(4,368)
Loans	(25,758)	(6,085)
Other	(125)	213
Net cash provided (used) by investing activities	(23,379)	(6,023)
Net change in
Noninterest-bearing deposits	8,857	(2,337)
Interest-bearing deposits	7,829	5,736
Federal funds purchased and repurchase agreements	2,306	2,232
Federal Home Loan Bank borrowings	(400)
Other borrowed funds	1,044	250
Sales/issuances
Federal Home Loan Bank borrowings	9,060	5,000
Bank notes and senior debt	3,486	2,147
Other borrowed funds	172	397
Common and treasury stock	23	22
Repayments/maturities
Federal Home Loan Bank borrowings	(1,510)	(6,000)
Bank notes and senior debt	(2,100)	(1,750)
Other borrowed funds	(172)	(296)
Acquisition of treasury stock	(1,522)	(826)
Preferred stock cash dividends paid	(63)	(63)
Common stock cash dividends paid	(503)	(436)
Net cash provided (used) by financing activities	26,507	4,076
Net Increase (Decrease) In Cash And Due From Banks And Restricted Cash	2,432	(546)
Cash and due from banks and restricted cash at beginning of period	5,061	5,608
Cash and due from banks and restricted cash at end of period	7,493	5,062
Cash and due from banks at end of period (unrestricted cash)	7,161	5,062
Restricted cash	332
Supplemental Disclosures
Interest paid	638	907
Income taxes paid	36	30
Income taxes refunded	5	2
Leased assets obtained in exchange for new operating lease liabilities	57	155
Right-of-use assets recognized at adoption of ASU 2016-02		2,004
Non-cash Investing and Financing Items
Transfer from loans to loans held for sale, net	313	139
Transfer from loans to foreclosed assets	$ 37	$ 48