CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
INTEREST INCOME:
Interest and fees on loans and leases	$ 3,653	$ 3,211	$ 3,012
Interest and fees on loans held for sale, at fair value	15	10	5
Interest and fees on other loans held for sale	6	7	23
Investment securities	584	621	619
Interest-bearing deposits in banks	8	5	5
Total interest income	4,266	3,854	3,664
INTEREST EXPENSE:
Deposits	270	237	156
Deposits held for sale	0	0	4
Federal funds purchased and securities sold under agreements to repurchase	2	16	32
Other short-term borrowed funds	40	67	89
Long-term borrowed funds	196	132	82
Total interest expense	508	452	363
Net interest income	3,758	3,402	3,301
Provision for credit losses	369	302	319
Net interest income after provision for credit losses	3,389	3,100	2,982
NONINTEREST INCOME:
Service charges and fees	599	575	574
Card fees	203	232	233
Trust and investment services fees	146	157	158
Mortgage banking fees	112	101	71
Capital markets fees	125	88	91
Foreign exchange and letter of credit fees	90	90	95
Bank-owned life insurance income	54	56	49
Securities gains, net	16	29	28
Net securities impairment losses recognized in earnings	(12)	(7)	(10)
Other income	164	101	389
Total noninterest income	1,497	1,422	1,678
NONINTEREST EXPENSE:
Salaries and employee benefits	1,709	1,636	1,678
Outside services	377	371	420
Occupancy	307	319	326
Equipment expense	263	257	250
Amortization of software	170	146	145
Other operating expense	526	530	573
Total noninterest expense	3,352	3,259	3,392
Income before income tax expense	1,534	1,263	1,268
Income tax expense	489	423	403
NET INCOME	1,045	840	865
Net income available to common stockholders	$ 1,031	$ 833	$ 865
Weighted-average common shares outstanding:
Basic (in shares)	522,093,545	535,599,731	556,674,146
Diluted (in shares)	523,930,718	538,220,898	557,724,936
Per common share information:
Basic earnings (in dollars per share)	$ 1.97	$ 1.55	$ 1.55
Diluted earnings (in dollars per share)	1.97	1.55	1.55
Dividends declared and paid (in dollars per share)	$ 0.46	$ 0.4	$ 1.43