Consolidated Statements Of Comprehensive Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
INTEREST INCOME
Interest and fees on loans	$ 385	$ 388	$ 761	$ 778
Interest on investment securities	53	52	108	105
Interest on short-term investments	3	3	7	6
Total interest income	441	443	876	889
INTEREST EXPENSE
Interest on deposits	11	15	22	30
Interest on medium- and long-term debt	14	14	28	29
Total interest expense	25	29	50	59
Net interest income	416	414	826	830
Provision for credit losses	11	13	20	29
Net interest income after provision for credit losses	405	401	806	801
NONINTEREST INCOME
Service charges on deposit accounts	54	53	108	108
Fiduciary income	45	44	89	87
Commercial lending fees	23	22	43	43
Card fees	19	18	38	35
Letter of credit fees	15	16	29	32
Bank-owned life insurance	11	10	20	19
Foreign exchange income	12	9	21	18
Brokerage fees	4	4	9	9
Net securities (losses) gains	0	(2)	1	(2)
Other noninterest income	37	48	70	86
Total noninterest income	220	222	428	435
NONINTEREST EXPENSES
Salaries and benefits expense	240	245	487	496
Net occupancy expense	39	39	79	78
Equipment expense	15	15	29	30
Outside processing fee expense	30	30	58	58
Software expense	25	22	47	44
Litigation-related expense	3	1	6	4
FDIC insurance expense	8	8	16	17
Advertising expense	5	6	11	12
Other noninterest expenses	39	50	77	93
Total noninterest expenses	404	416	810	832
Income before income taxes	221	207	424	404
Provision for income taxes	70	64	134	127
Net Income	151	143	290	277
Less income allocated to participating securities	2	2	4	4
Net income attributable to common shares	149	141	286	273
Basic earnings per common share	$ 0.83	$ 0.77	$ 1.59	$ 1.48
Diluted earnings per common share	$ 0.80	$ 0.76	$ 1.54	$ 1.46
Comprehensive income	172	15	377	152
Cash dividends declared on common stock	$ 36	$ 32	$ 71	$ 64
Cash dividends declared per common share	$ 0.20	$ 0.17	$ 0.39	$ 0.34