CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss	$ (940)	$ 113	$ 320
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	304	164	(80)
Goodwill impairment	784	365	0
Provision for credit losses	810	195	(73)
Deferred income tax provision	25	109	151
Net realized gains on securities available-for-sale	(137)	(88)	(24)
Net change in other assets and liabilities	(839)	1,846	(1,830)
Net change in loans held for sale:
Originations and purchases of loans held for sale	(3,044)	(3,364)	(2,399)
Sales and collections of loans held for sale	3,001	3,271	2,850
Net change in trading assets and liabilities	3,330	(6,882)	(7,076)
Lower of amortized cost or fair value adjustments on loans held for sale	22	(1)	(5)
Loss (gain) on instruments designated at fair value and related derivatives	(34)	13	(19)
Net cash provided by (used in) operating activities	3,282	(4,259)	(8,185)
Cash flows from investing activities
Net change in federal funds sold and securities purchased under agreements to resell	(17,908)	(7,670)	22,450
Securities available-for-sale:
Purchases of securities available-for-sale	(25,165)	(24,829)	(10,540)
Proceeds from sales of securities available-for-sale	11,857	12,878	5,169
Proceeds from maturities of securities available-for-sale	10,190	9,121	4,224
Securities held-to-maturity:
Purchases of securities held-to-maturity	(515)	(1,468)	(3,007)
Proceeds from sales of securities held-to-maturity	340	0	0
Proceeds from maturities of securities held-to-maturity	4,415	2,803	2,276
Change in loans:
Collections, net of originations	5,312	(532)	2,527
Loans sold to third parties	916	1,209	758
Net cash provided by (used in) sales (acquisitions) of properties and equipment	1	(61)	(17)
Net inflow (outflow) related to the sale of certain private banking client relationships	0	1	(515)
Other, net	(248)	119	50
Net cash provided by (used in) investing activities	(10,805)	(8,429)	23,375
Cash flows from financing activities
Net change in deposits	20,110	8,287	(6,928)
Debt:
Net change in short-term borrowings	1,293	(535)	(469)
Issuance of long-term debt	8,487	4,686	11,923
Repayment of long-term debt	(10,427)	(10,705)	(14,704)
Return of capital to parent	0	(2,400)	0
Other increases in capital surplus	10	0	6
Dividends paid	(77)	(77)	(76)
Net cash provided by (used in) financing activities	19,396	(744)	(10,248)
Net change in cash and due from banks and interest bearing deposits with banks	11,873	(13,432)	4,942
Cash and due from banks and interest bearing deposits with banks at beginning of period	3,782	17,214	12,272
Cash and due from banks and interest bearing deposits with banks at end of period	$ 15,655	$ 3,782	$ 17,214