CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
INTEREST INCOME:
Interest and fees on loans and leases (related party balances of $72, $56 and $0, respectively)	$ 3,012	$ 3,001	$ 3,205
Interest and fees on loans held for sale	5	12	17
Interest and fees on other loans held for sale	23	0	0
Investment securities	619	477	620
Interest-bearing deposits in banks	5	11	4
Total interest income	3,664	3,501	3,846
INTEREST EXPENSE:
Deposits (related party balances of $0, $15 and $104, respectively)	156	216	375
Deposits held for sale	4	0	0
Federal funds purchased and securities sold under agreements to repurchase (related party balances of $24, $184, and $117, respectively)	32	192	119
Other short-term borrowed funds (related party balances of $75, $3, and $90, respectively)	89	4	101
Long-term borrowed funds (related party balances of $64, $16 and $9, respectively)	82	31	24
Total interest expense	363	443	619
Net interest income	3,301	3,058	3,227
Provision for credit losses	319	479	413
Net interest income after provision for credit losses	2,982	2,579	2,814
NONINTEREST INCOME:
Service charges and fees (related party balances of $6, $15 and $23, respectively)	574	640	704
Card fees	233	234	249
Trust and investment services fees	158	149	131
Foreign exchange and trade finance fees (related party balances of $58, ($15) and ($9), respectively)	95	97	105
Capital markets fees (related party balances of $11, $14 and $7, respectively)	91	53	52
Mortgage banking fees	71	153	189
Bank-owned life insurance income	49	50	51
Securities gains, net	28	144	95
Other-than-temporary impairment:
Total other-than-temporary impairment losses	(45)	(49)	(84)
Portions of loss recognized in other comprehensive income (before taxes)	35	41	60
Net impairment losses recognized in earnings	(10)	(8)	(24)
Other income (related party balances of ($209), ($32) and ($285), respectively)	389	120	115
Total noninterest income	1,678	1,632	1,667
NONINTEREST EXPENSE:
Salaries and employee benefits	1,678	1,652	1,743
Outside services (related party balances of $22, $20 and $21, respectively)	420	360	339
Occupancy (related party balances of $1, $3 and $2, respectively)	326	327	310
Equipment expense	250	275	279
Amortization of software	145	102	77
Goodwill impairment	0	4,435	0
Other operating expense	573	528	709
Total noninterest expense	3,392	7,679	3,457
Income (loss) before income tax expense (benefit)	1,268	(3,468)	1,024
Income tax expense (benefit)	403	(42)	381
NET INCOME (LOSS)	$ 865	$ (3,426)	$ 643
Weighted-average number of shares outstanding:
Basic (in Shares)	556,674,146	559,998,324	559,998,324
Diluted (in Shares)	557,724,936	559,998,324	559,998,324
Per common share information:
Basic earnings (in Dollars per Share)	$ 1.55	$ (6.12)	$ 1.15
Diluted earnings (in Dollars per Share)	$ 1.55	$ (6.12)	$ 1.15
Dividends declared and paid to parent (in Dollars per Share)	$ 1.43	$ 2.12	$ 0.27