Consolidated Statements Of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INTEREST INCOME
Interest and fees on loans	$ 1,872	$ 1,635	$ 1,551
Interest on investment securities	250	247	216
Interest on short-term investments	60	27	17
Total interest income	2,182	1,909	1,784
INTEREST EXPENSE
Interest on deposits	42	40	43
Interest on short-term borrowings	3	0	0
Interest on medium- and long-term debt	76	72	52
Total interest expense	121	112	95
Net interest income	2,061	1,797	1,689
Provision for credit losses	74	248	147
Net interest income after provision for credit losses	1,987	1,549	1,542
NONINTEREST INCOME
Card fees	333	303	276
Service charges on deposit accounts	227	219	223
Fiduciary income	198	190	187
Commercial lending fees	85	89	99
Letter of credit fees	45	50	53
Bank-owned life insurance	43	42	40
Foreign exchange income	45	42	40
Brokerage fees	23	19	17
Net securities losses	(3)	(5)	(2)
Other noninterest income	111	102	102
Total noninterest income	1,107	1,051	1,035
NONINTEREST EXPENSES
Salaries and benefits expense	912	961	1,009
Outside processing fee expense	366	336	318
Net occupancy expense	154	157	159
Equipment expense	45	53	53
Restructuring charges	45	93	0
Software expense	126	119	99
FDIC insurance expense	51	54	37
Advertising expense	28	21	24
Litigation-related expense	(2)	1	(32)
Other noninterest expenses	135	135	160
Total noninterest expenses	1,860	1,930	1,827
Income before income taxes	1,234	670	750
Provision for income taxes	491	193	229
Net Income	743	477	521
Less income allocated to participating securities	5	4	6
Net income attributable to common shares	$ 738	$ 473	$ 515
Basic earnings per common share	$ 4.23	$ 2.74	$ 2.93
Diluted earnings per common share	$ 4.14	$ 2.68	$ 2.84
Cash dividends declared on common stock	$ 193	$ 154	$ 148
Cash dividends declared per common share	$ 1.09	$ 0.89	$ 0.83