CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME:
Interest and fees on loans and leases	$ 1,287	$ 1,096	$ 3,663	$ 3,128
Interest and fees on loans held for sale, at fair value	14	5	23	13
Interest and fees on other loans held for sale	2	3	9	6
Investment securities	167	155	500	469
Interest-bearing deposits in banks	7	5	21	13
Total interest income	1,477	1,264	4,216	3,629
INTEREST EXPENSE:
Deposits	214	123	540	311
Federal funds purchased and securities sold under agreements to repurchase	2	1	4	2
Other short-term borrowed funds	19	7	42	22
Long-term borrowed funds	94	71	270	201
Total interest expense	329	202	856	536
Net interest income	1,148	1,062	3,360	3,093
Provision for credit losses	78	72	241	238
Net interest income after provision for credit losses	1,070	990	3,119	2,855
NONINTEREST INCOME:
Service charges and fees	131	131	382	385
Card fees	61	58	182	177
Capital markets fees	47	53	134	152
Trust and investment services fees	45	38	128	116
Letter of credit and loan fees	32	30	94	90
Foreign exchange and interest rate products	31	24	92	77
Mortgage banking fees	49	27	101	80
Securities gains, net	3	2	13	9
Net impairment losses recognized in earnings on debt securities	(1)	(1)	(3)	(6)
Other income	18	19	52	50
Total noninterest income	416	381	1,175	1,130
NONINTEREST EXPENSE:
Salaries and employee benefits	474	438	1,397	1,316
Outside services	107	99	312	286
Occupancy	81	78	241	239
Equipment expense	70	65	201	196
Amortization of software	47	45	139	134
Other operating expense	131	133	378	405
Total noninterest expense	910	858	2,668	2,576
Income before income tax expense	576	513	1,626	1,409
Income tax expense	133	165	370	423
NET INCOME	443	348	1,256	986
Net income available to common stockholders	$ 436	$ 341	$ 1,242	$ 972
Weighted-average common shares outstanding:
Basic (in Shares)	475,957,526	500,861,076	482,691,884	505,529,991
Diluted (in Shares)	477,599,917	502,157,384	484,250,843	507,062,805
Per common share information:
Basic earnings (in Dollars per Share)	$ 0.92	$ 0.68	$ 2.57	$ 1.92
Diluted earnings (in Dollars per Share)	0.91	0.68	2.57	1.92
Dividends declared and paid (in Dollars per Share)	$ 0.27	$ 0.18	$ 0.71	$ 0.46