Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities:
Net (loss) income including noncontrolling interests	$ (310)	$ 179
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
(Reversal of) provision for credit losses	470	38
Depreciation, amortization and accretion, net	165	96
Stock-based compensation—restricted stock units	19	17
Deferred income taxes	(159)	(88)
Net gains on sales of securities	(53)	(1)
Net decrease (increase) in securities borrowed or purchased under resale agreements	8,228	(492)
Net decrease (increase) in securities loaned or sold under repurchase agreements	(6,243)	140
Net decrease (increase) in trading account assets	(1,422)	324
Net decrease (increase) in other assets	(810)	89
Net increase (decrease) in trading account liabilities	(811)	(131)
Net increase (decrease) in other liabilities	454	491
Loans originated for sale	(1,409)	(234)
Net proceeds from sale of loans originated for sale	1,098	612
Pension and other benefits adjustment	(5)	(10)
Other, net	21	(1)
Total adjustments	(457)	850
Net cash provided by (used in) operating activities	(767)	1,029
Cash Flows from Investing Activities:
Proceeds from sales of securities available for sale	2,537	676
Proceeds from paydowns and maturities of securities available for sale	611	490
Purchases of securities available for sale	(126)	(1,760)
Proceeds from paydowns and maturities of securities held to maturity	539	1,170
Purchases of securities held to maturity	0	(850)
Proceeds from sales of loans	298	121
Net decrease (increase) in loans	(1,829)	(1,002)
Purchases of other investments	(109)	(20)
Other, net	(90)	(204)
Net cash provided by (used in) investing activities	1,831	(1,379)
Cash Flows from Financing Activities:
Net increase (decrease) in deposits	2,615	1,927
Net increase (decrease) in commercial paper and other short-term borrowings	(900)	(420)
Proceeds from issuance of long-term debt	505	1,300
Repayment of long-term debt	(948)	(1,886)
Other, net	(1)	0
Change in noncontrolling interests	1	0
Net cash provided by (used in) financing activities	1,272	921
Net change in cash, cash equivalents and restricted cash	2,336	571
Cash, cash equivalents and restricted cash at beginning of period	9,695	8,398
Cash, cash equivalents and restricted cash at end of period	12,031	8,969
Cash Paid During the Period For:
Interest	453	706
Income taxes, net	29	21
Supplemental Schedule of Noncash Investing and Financing Activities:
Securities available for sale transferred to securities held to maturity	73	71
securities held to maturity transferred to securities available for sale	0	170
Reconciliation of Cash, Cash Equivalents and Restricted Cash:
Cash and cash equivalents	9,641
Total cash, cash equivalents and restricted cash per consolidated statement of cash flows	$ 12,031	$ 8,969