CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Cash flows from operating activities
Net income (loss)		$ 688		$ (940)		$ 113
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		262		304		164
Goodwill impairment		0		784		365
Provision for credit losses		(570)		810		195
Deferred income tax provision		340		25		109
Net realized gains on securities available-for-sale		(73)		(137)		(88)
Net change in other assets and liabilities		172		(839)		1,846
Net change in loans held for sale:
Originations and purchases of loans held for sale		(2,544)		(3,044)		(3,364)
Sales and collections of loans held for sale		2,699		3,001		3,271
Net change in trading assets and liabilities		867		3,330		(6,882)
Lower of amortized cost or fair value adjustments on loans held for sale		14		22		(1)
Loss (gain) on instruments designated at fair value and related derivatives		(35)		(34)		13
Net cash provided by (used in) operating activities		1,820		3,282		(4,259)
Cash flows from investing activities
Net change in federal funds sold and securities purchased under agreements to resell		25,232		(17,908)		(7,670)
Securities available-for-sale:
Purchases of securities available-for-sale		(18,501)		(25,165)		(24,829)
Proceeds from sales of securities available-for-sale		10,324		11,857		12,878
Proceeds from paydowns and maturities of securities available-for-sale		12,030		10,190		9,121
Securities held-to-maturity:
Purchases of securities held-to-maturity		0		(515)		(1,468)
Proceeds from sales of securities held-to-maturity		0		340		0
Proceeds from paydowns and maturities of securities held-to-maturity		3,747		4,415		2,803
Change in loans:
Originations, net of collections		(618)		5,312		(532)
Loans sold to third parties		2,758		916		1,209
Net cash provided by (used for) sales (acquisitions) of properties and equipment		(3)		1		(61)
Net inflow related to the sale of certain private banking client relationships.		0		0		1
Other, net		103		(248)		119
Net cash provided by (used in) investing activities		35,072		(10,805)		(8,429)
Cash flows from financing activities
Net change in deposits		(2,107)		20,110		8,287
Debt:
Net change in short-term borrowings		1,386		1,293		(535)
Issuance of long-term debt		7,711		8,487		4,686
Repayment of long-term debt		(10,044)		(10,427)		(10,705)
Return of capital to parent		(1,000)		0		(2,400)
Other increases (decreases) in capital surplus		(4)		10		0
Dividends paid		(77)		(77)		(77)
Net cash provided by (used in) financing activities		(4,135)		19,396		(744)
Net change in cash and due from banks and interest bearing deposits with banks		32,757		11,873		(13,432)
Cash and due from banks and interest bearing deposits with banks at beginning of period		15,655	[1]	3,782	[1]	17,214
Cash and due from banks and interest bearing deposits with banks at end of period	[1]	48,412		15,655		3,782
Supplemental disclosure of cash flow information
Interest paid during the period		606		1,518		2,921
Net income taxes paid (refunded) during the period		(52)		50		159
Supplemental disclosure of non-cash investing activities
Transfer of loans to held for sale, net		6,982		1,030		1,209
Fair value of properties added to real estate owned upon foreclosure		0		2		16
Supplemental disclosure of non-cash financing activities
Recharacterization of long-term debt to time deposits		$ 0		$ 5,000		$ 0

[1] Includes $58 million of cash which is reported in other branch related assets held for sale on the consolidated balance sheet at December 31, 2021.