Consolidated Balance Sheet (Parenthetical) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Cash and due from banks	$ 4,360,000,000	[1]	$ 4,043,000,000	[1]
Interest-earning deposits with banks	31,779,000,000	[1]	12,135,000,000	[1]
Loans	204,817,000,000	[1],[2]	195,613,000,000	[1],[2]
Allowance for loan and lease losses	(3,331,000,000)	[1]	(3,609,000,000)	[1]
Equity investments	10,728,000,000	[1],[3]	10,560,000,000	[1],[3]
Other assets	23,482,000,000	[1],[2]	22,552,000,000	[1],[2]
Other borrowed funds	3,357,000,000	[1],[2]	3,060,000,000	[1],[2]
Accrued expenses	5,187,000,000	[1],[3]	4,690,000,000	[1],[3]
Other liabilities	4,550,000,000	[1]	4,187,000,000	[1]
Common stock, par value	$ 5		$ 5
Common stock, authorized	800		800
Common stock, issued	541		540
Common stock held in treasury at cost, shares	18		7
Preferred stock (d)	500,000	[4]	500,000	[4]
Portion at Fair Value, Fair Value Disclosure
Federal funds sold and resale agreements, fair value	155,000,000	[2]	207,000,000	[2]
Loans held for sale, fair value	2,154,000,000	[2]	1,901,000,000	[2]
Loans, Fair Value	1,034,000,000	[2]	1,150,000,000	[2]
Other assets, fair value	412,000,000	[2]	338,000,000	[2]
Other borrowed funds, fair value	273,000,000	[2]	309,000,000	[2]
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks	6,000,000	[1]	5,000,000	[1]
Interest-earning deposits with banks	6,000,000	[1]	7,000,000	[1]
Loans	1,606,000,000	[1]	1,736,000,000	[1]
Allowance for loan and lease losses	(50,000,000)	[1]	(58,000,000)	[1]
Equity investments	492,000,000	[1]	582,000,000	[1]
Other assets	483,000,000	[1]	591,000,000	[1]
Other borrowed funds	347,000,000	[1]	414,000,000	[1]
Accrued expenses	70,000,000	[1]	83,000,000	[1]
Other liabilities	$ 206,000,000	[1]	$ 252,000,000	[1]

[1] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).

[2] Amounts represent items for which we have elected the fair value option.

[3] Amounts for 2013 period have been updated to reflect the first quarter 2014 adoption of ASU 2014-01 related to investments in low income housing tax credits.

[4] Par value less than $.5 million at each date.