Consolidated Statements of Shareholders' Equity (USD $) In Millions, except Share data, unless otherwise specified		Total USD ($)		Preferred Stock [Member] USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Treasury Stock and Other USD ($)		Accumulated Other Comprehensive Income (Loss) [Member] USD ($)		Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period at Dec. 31, 2013		$ 21,422		$ 725	$ 550	$ 9,115	$ 11,936	$ (615)	[1]	$ (289)	[2]
Common Stock, Shares, Outstanding, beginning of period at Dec. 31, 2013					536,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		405					405
Other Comprehensive Income (Loss), Net of Tax		89								89	[2]
Noncontrolling Interest, Period Increase (Decrease)		7						7	[1]
Dividends, Common Stock, Cash		(54)					(54)
Dividends, Preferred Stock, Cash	[3]	(9)					(9)
Treasury Stock, Shares, Acquired												(1,000,000)
Treasury Stock, Value, Acquired, Cost Method		(50)						(50)	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period												0
Stock Issued During Period, Value, Stock Options Exercised		(1)				(9)		8	[1]
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures												0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		4				7		(3)	[1]
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		8						8	[1]
Stock Issued During Period, Shares, Employee Benefit Plan												0
Stock Issued During Period, Value, Employee Benefit Plan		(4)				(6)		2	[1]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Mar. 31, 2014		21,817		725	550	9,107	12,278	(643)	[1]	(200)	[2]
Common Stock, Shares, Outstanding, end of period at Mar. 31, 2014					535,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period at Dec. 31, 2014		23,005		1,225	550	9,089	13,295	(1,032)	[1]	(122)	[2]
Common Stock, Shares, Outstanding, beginning of period at Dec. 31, 2014		524,540,000	[4]		525,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent		429					429
Other Comprehensive Income (Loss), Net of Tax		57								57	[2]
Noncontrolling Interest, Period Increase (Decrease)		(2)						(2)	[1]
Dividends, Common Stock, Cash		(105)					(105)
Dividends, Preferred Stock, Cash	[3]	(17)					(17)
Treasury Stock, Shares, Acquired												(3,000,000)
Treasury Stock, Value, Acquired, Cost Method		(115)						(115)	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period												0
Stock Issued During Period, Value, Stock Options Exercised		1				(10)		11	[1]
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures												0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		0				(5)	(2)	7	[1]
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		6						6	[1]
Stock Issued During Period, Shares, Employee Benefit Plan												0
Stock Issued During Period, Value, Employee Benefit Plan		1				0		1	[1]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Mar. 31, 2015		$ 23,260		$ 1,225	$ 550	$ 9,074	$ 13,600	$ (1,124)	[1]	$ (65)	[2]
Common Stock, Shares, Outstanding, end of period at Mar. 31, 2015		522,031,000	[4]		522,000,000

[1] At March 31, 2015, includes ($1,215) million for treasury stock, ($15) million for compensation element of restricted stock, and $106 million for noncontrolling interest.At March 31, 2014, includes ($727) million for treasury stock, ($42) million for compensation element of restricted stock, and $126 million for noncontrolling interest.

[2] At March 31, 2015, includes $384 million in unrealized net gains on securities AFS, $141 million in unrealized net gains on derivative financial instruments, and ($590) million related to employee benefit plans. At March 31, 2014, includes $31 million in unrealized net gains on securities AFS, $229 million in unrealized net gains on derivative financial instruments, and ($460) million related to employee benefit plans.

[3] For the three months ended March 31, 2015, dividends were $1,000 per share for both Perpetual Preferred Stock Series A and B, $1,469 per share for Perpetual Preferred Stock Series E, and $1,406 per share for Perpetual Preferred Stock Series F.For the three months ended March 31, 2014, dividends were $1,000 per share for both Perpetual Preferred Stock Series A and B, and $1,469 per share for Perpetual Preferred Stock Series E.

[4] Includes restricted shares of 1,712 thousand and 2,930 thousand at March 31, 2015 and December 31, 2014, respectively.