CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
INTEREST INCOME:
Interest and fees on loans and leases	$ 992	$ 868
Interest and fees on loans held for sale, at fair value	4	3
Interest and fees on other loans held for sale	1	1
Investment securities	160	145
Interest-bearing deposits in banks	3	2
Total interest income	1,160	1,019
INTEREST EXPENSE:
Deposits	86	60
Federal funds purchased and securities sold under agreements to repurchase	1	1
Other short-term borrowed funds	8	11
Long-term borrowed funds	60	43
Total interest expense	155	115
Net interest income	1,005	904
Provision for credit losses	96	91
Net interest income after provision for credit losses	909	813
NONINTEREST INCOME:
Service charges and fees	125	126
Card fees	60	50
Capital markets fees	48	25
Trust and investment services fees	39	37
Letter of credit and loan fees	29	27
Foreign exchange and interest rate products	27	18
Mortgage banking fees	23	18
Securities gains, net	4	9
Net securities impairment losses recognized in earnings	(1)	(1)
Other income	25	21
Total noninterest income	379	330
NONINTEREST EXPENSE:
Salaries and employee benefits	444	425
Outside services	91	91
Occupancy	82	76
Equipment expense	67	65
Amortization of software	44	39
Other operating expense	126	115
Total noninterest expense	854	811
Income before income tax expense	434	332
Income tax expense	114	109
NET INCOME	320	223
Net income available to common stockholders	$ 313	$ 216
Weighted-average common shares outstanding:
Basic (in Shares)	509,451,450	528,070,648
Diluted (in Shares)	511,348,200	530,446,188
Per common share information:
Basic earnings (in Dollars per Share)	$ 0.61	$ 0.41
Diluted earnings (in Dollars per Share)	0.61	0.41
Dividends declared and paid (in Dollars per Share)	$ 0.14	$ 0.1