Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Millions		Total		Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]		Treasury Stock and Other	[1]	AOCI Attributable to Parent [Member]		Common Stock [Member] Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period		$ (23,005)		$ (1,225)	$ (550)	$ (9,089)	$ (13,295)		$ (1,032)		$ 122
Common Stock, Shares, Outstanding					525,000
Net Income (Loss) Attributable to Parent		429					429
Other Comprehensive Income (Loss), Net of Tax		57									57
Noncontrolling Interest, Period Increase (Decrease)		(2)							(2)
Dividends, Common Stock, Cash		(105)					(105)
Dividends, Preferred Stock, Cash	[2]	(17)					(17)
Treasury Stock, Shares, Acquired													3,000
Treasury Stock, Value, Acquired, Cost Method		115							115
Payments for Repurchase of Warrants		0
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)
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
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		6							6
Stock Issued During Period, Shares, Employee Benefit Plan													0
Stock Issued During Period, Value, Employee Benefit Plan		1				0			1
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period		(23,260)		(1,225)	$ (550)	(9,074)	(13,600)		(1,124)		65
Common Stock, Shares, Outstanding					522,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period		$ (23,437)		(1,225)	$ (550)	(9,094)	(14,686)		(1,658)		460
Common Stock, Shares, Outstanding		508,712	[3]		509,000
Cumulative effect of credit risk adjustment		$ 0					5	[4]			(5)	[4]
Net Income (Loss) Attributable to Parent		447					447
Other Comprehensive Income (Loss), Net of Tax		486									486
Noncontrolling Interest, Period Increase (Decrease)		(7)	[2]						(7)
Dividends, Common Stock, Cash		(121)					(121)
Dividends, Preferred Stock, Cash		(17)					(17)	[2]
Treasury Stock, Shares, Acquired													4,000
Treasury Stock, Value, Acquired, Cost Method		151							151
Payments for Repurchase of Warrants		(24)				(24)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period													0
Stock Issued During Period, Value, Stock Options Exercised		(1)				(3)			(2)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures													0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures		2				(50)	(1)		53
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition		2							2
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period		$ (24,053)		$ (1,225)	$ (550)	$ (9,017)	$ (14,999)		$ (1,759)		$ (21)
Common Stock, Shares, Outstanding		505,443	[3]		505,000

[1] At March 31, 2016, includes ($1,859) million for treasury stock, ($1) million for the compensation element of restricted stock, and $101 million for noncontrolling interest.At March 31, 2015, includes ($1,215) million for treasury stock, ($15) million for the compensation element of restricted stock, and $106 million for noncontrolling interest.

[2] For the three months ended March 31, 2016, dividends were $1,011 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, 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.

[3] Includes restricted shares of 80 thousand and 1,334 thousand at March 31, 2016 and December 31, 2015, respectively.

[4] Related to the Company's early adoption of the ASU 2016-01 provision related to changes in instrument-specific credit risk, for the three months ended March 31, 2016. See Note 1, "Significant Accounting Policies," and Note 17, "Accumulated Other Comprehensive Income/(Loss)," for additional information.