CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS:
Securities held-to-maturity, Fair Value	$ 5,281	$ 5,193
Derivative assets	742	629
Other assets	2,425	2,412
LIABILITIES:
Interest-bearing	72,320	69,621
Derivative liabilities	616	612
Long-term borrowed funds	3,904	4,642
Other liabilities	1,389	1,606
STOCKHOLDERS’ EQUITY:
Preferred Stock, Par Value (in Dollars per Share)	$ 25	$ 25
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par Value (in Dollars per Share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares Issued	562,673,438	560,262,638
Common Stock, Shares Outstanding	547,490,812	545,884,519
Treasury Stock, Shares	15,182,626	14,378,119
Related Party
ASSETS:
Derivative assets	14	1
Other assets	8	7
LIABILITIES:
Interest-bearing	5	5
Derivative liabilities	276	387
Long-term borrowed funds	2,000	2,000
Other liabilities	$ 33	$ 30