Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
INTEREST INCOME
Interest and fees on loans		$ 386	$ 517
Interest on investment securities		69	74
Interest on short-term investments		4	18
Total interest income		459	609
INTEREST EXPENSE
Interest on deposits		7	56
Interest on medium- and long-term debt	[1]	9	40
Total interest expense		16	96
Net interest income		443	513
Provision for credit losses		(182)	411
Net interest income after provision for credit losses		625	102
NONINTEREST INCOME
Card fees		71	59
Fiduciary income		53	54
Service charges on deposit accounts		48	49
Derivative income		30	20
Commercial lending fees		18	17
Bank-owned life insurance		11	12
Letter of credit fees		10	9
Brokerage fees		4	7
Net securities losses		0	(1)
Other noninterest income		25	11
Total noninterest income		270	237
NONINTEREST EXPENSES
Salaries and benefits expense		282	242
Outside processing fee expense		64	57
Occupancy expense		39	37
Software expense		39	37
Equipment expense		12	12
Advertising expense		6	7
FDIC insurance expense		6	8
Other noninterest expenses		(1)	17
Total noninterest expenses		447	417	[2]
Income (loss) before income taxes		448	(78)
Provision (benefit) for income taxes		98	(19)	[2]
Net income (loss)		350	(59)	[2]
Less income allocated to participating securities		1	0
Preferred stock dividends		6	0
Net income (loss) attributable to common shares		$ 343	$ (59)
Basic earnings (losses) per common share		$ 2.46	$ (0.42)
Diluted earnings (losses) per common share		$ 2.43	$ (0.42)
Comprehensive income		$ 181	$ 344
Cash dividends declared on common stock		$ 95	$ 94
Cash dividends declared per common share		$ 0.68	$ 0.68

[1] Includes the effects of hedging.

[2] See Defined Benefit Pension and Other Postretirement Costs in Note 1.