Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
OPERATING ACTIVITIES
Net income	$ 189	$ 350
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	(11)	(182)
(Benefit) provision for deferred income taxes	(2)	39
Depreciation and amortization	23	25
Net periodic defined benefit credit	(22)	(20)
Share-based compensation expense	28	22
Net amortization of securities	10	8
Net change in accrued income receivable	(1)	(5)
Net change in accrued expenses payable	(93)	26
Other, net	(831)	(104)
Net cash (used in) provided by operating activities	(710)	159
INVESTING ACTIVITIES
Maturities and redemptions of investments securities available-for-sale	806	992
Purchases of investment securities available-for-sale	(3,605)	(1,750)
Net change in loans	(391)	1,685
Net increase in premises and equipment	(17)	(18)
Redemptions of Federal Home Loan Bank stock	0	115
Proceeds from bank-owned life insurance settlements	8	5
Other, net	2	(21)
Net cash (used in) provided by investing activities	(3,197)	1,008
FINANCING ACTIVITIES
Net change in deposits	(5,104)	824
Maturities and redemptions of medium- and long-term debt	0	(2,800)
Preferred stock cash dividends paid	(6)	(6)
Repurchases of common stock	(39)	(8)
Cash dividends paid on common stock	(89)	(95)
Issuances of common stock under employee stock plans	18	10
Other, net	(2)	12
Net cash used in financing activities	(5,222)	(2,063)
Net decrease in cash and cash equivalents	(9,129)	(896)
Cash and cash equivalents at beginning of period	22,679	15,767
Cash and cash equivalents at end of period	13,550	14,871
Interest paid	16	20
Income taxes paid	$ 5	$ 1