CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
INTEREST INCOME:
Interest and fees on loans and leases (related party balances of $18 and $18, respectively)	$ 779	$ 730
Interest and fees on loans held for sale	1	1
Interest and fees on other loans held for sale	2	12
Investment securities	159	149
Interest-bearing deposits in banks	1	1
Total interest income	942	893
INTEREST EXPENSE:
Deposits	52	33
Deposits held for sale	0	2
Federal funds purchased and securities sold under agreements to repurchase (related party balances of $5 and $13, respectively)	7	15
Other short-term borrowed funds (related party balances of $10 and $16, respectively)	15	19
Long-term borrowed funds (related party balances of $20 and $12, respectively)	32	16
Total interest expense	106	85
Net interest income	836	808
Provision for credit losses	58	121
Net interest income after provision for credit losses	778	687
NONINTEREST INCOME:
Service charges and fees (related party balances of $1 and $2, respectively)	135	139
Card fees	52	56
Trust and investment services fees	36	39
Foreign exchange and trade finance fees (related party balances of $35 and ($6), respectively)	23	22
Capital markets fees (related party balances of $3 and $3, respectively)	22	18
Mortgage banking fees	33	20
Bank-owned life insurance income	12	11
Securities gains, net	8	25
Total other-than-temporary impairment losses	(31)	(34)
Portions of loss recognized in other comprehensive income (before taxes)	30	30
Net impairment losses recognized in earnings	1	4
Other income (related party balances of ($68) and ($53), respectively)	27	32
Total noninterest income	347	358
NONINTEREST EXPENSE:
Salaries and employee benefits	419	405
Outside services (related party balances of $2 and $8, respectively)	79	83
Occupancy	80	81
Equipment expense	63	64
Amortization of software	36	31
Other operating expense	133	146
Total noninterest expense	810	810
Income before income tax expense	315	235
Income tax expense	106	69
NET INCOME	$ 209	$ 166
Weighted-average number of shares outstanding:
Basic (in Shares)	546,291,363	559,998,324
Diluted (in Shares)	549,798,717	559,998,324
Per common share information:
Basic earnings (in Dollars per Share)	$ 0.38	$ 0.30
Diluted earnings (in Dollars per Share)	$ 0.38	$ 0.30
Dividends declared and paid (in Dollars per Share)	$ 0.10	$ 0.04