Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES
Net income	$ 259	$ 929
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	554	66
(Benefit) provision for deferred income taxes	(104)	4
Depreciation and amortization	82	84
Net periodic defined benefit credit	(19)	(23)
Share-based compensation expense	18	37
Net amortization of securities	7	2
Net securities losses	0	8
Net gains on sales of foreclosed property	(1)	0
Net change in accrued income receivable	32	1
Net change in accrued expenses payable	(50)	(39)
Other, net	(58)	(200)
Net cash provided by operating activities	720	869
INVESTING ACTIVITIES
Maturities and redemptions of investment securities available-for-sale	2,344	1,615
Sales of investment securities available-for-sale	0	987
Purchases of investment securities available-for-sale	(4,796)	(2,721)
Net change in loans	(2,185)	(1,419)
Proceeds from sales of foreclosed property	3	1
Net increase in premises and equipment	(51)	(62)
Purchases of Federal Home Loan Bank stock	(51)	(201)
Redemptions of Federal Home Loan Bank stock	92	201
Proceeds from bank-owned life insurance settlements	14	7
Other, net	0	2
Net cash used in investing activities	(4,630)	(1,590)
FINANCING ACTIVITIES
Net change in deposits	11,054	1,105
Net change in short-term borrowings	(61)	7
Maturities and redemptions of medium- and long-term debt	(1,675)	(350)
Issuances and advances of medium- and long-term debt	0	1,050
Issuance of preferred stock	394	0
Repurchases of common stock	(199)	(1,242)
Cash dividends paid on common stock	(282)	(303)
Issuances of common stock under employee stock plans	2	12
Other, net	0	(2)
Net cash provided by financing activities	9,233	277
Net increase (decrease) in cash and cash equivalents	5,323	(444)
Cash and cash equivalents at beginning of period	5,818	4,561
Cash and cash equivalents at end of period	11,141	4,117
Interest paid	186	347
Income tax paid	133	221
Noncash investing and financing activities:
Loans transferred to other real estate	$ 1	$ 3