Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES
Net income	$ 48	$ 637
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	549	31
Benefit for deferred income taxes	(95)	(4)
Depreciation and amortization	55	57
Net periodic defined benefit credit	(13)	(14)
Share-based compensation expense	12	32
Net amortization of securities	1	1
Net securities losses	0	8
Net change in accrued income receivable	43	(12)
Net change in accrued expenses payable	(64)	(86)
Other, net	208	(225)
Net cash provided by operating activities	744	425
INVESTING ACTIVITIES
Maturities and redemptions of investment securities available-for-sale	1,311	991
Sales of investment securities available-for-sale	0	987
Purchases of investment securities available-for-sale	(1,387)	(2,043)
Net change in loans	(3,229)	(1,685)
Proceeds from sales of foreclosed property	1	0
Net increase in premises and equipment	(29)	(29)
Purchases of Federal Home Loan Bank stock	(51)	(49)
Redemptions of Federal Home Loan Bank stock	30	0
Proceeds from bank-owned life insurance settlements	10	7
Net cash used in investing activities	(3,344)	(1,821)
FINANCING ACTIVITIES
Net change in deposits	10,327	(209)
Net change in short-term borrowings	681	1,689
Maturities and redemptions of medium- and long-term debt	(925)	(350)
Issuances and advances of medium- and long-term debt	0	350
Issuance of preferred stock	395	0
Repurchases of common stock	(199)	(872)
Cash dividends paid on common stock	(191)	(203)
Issuances of common stock under employee stock plans	5	11
Net cash provided by financing activities	10,093	416
Net increase (decrease) in cash and cash equivalents	7,493	(980)
Cash and cash equivalents at beginning of period	5,818	4,561
Cash and cash equivalents at end of period	13,311	3,581
Interest paid	152	220
Income tax paid	77	161
Noncash investing and financing activities:
Loans transferred to other real estate	$ 1	$ 2