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]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock [Member] 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)		$ (289)
Common Stock, Shares, Outstanding, beginning of period at Dec. 31, 2013				536,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	1,380					1,380
Other Comprehensive Income (Loss), Net of Tax	112									112
Dividends, Common Stock, Cash	(266)					(266)
Dividends, Preferred Stock, Cash	(28)					(28)	[2]
Treasury Stock, Shares, Acquired											(9,000)
Treasury Stock, Value, Acquired, Cost Method	(348)							(348)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period											0
Stock Issued During Period, Value, Stock Options Exercised	1				(14)			15
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures											0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	12				13	(2)		1
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	21							21
Stock Issued During Period, Shares, Employee Benefit Plan											0
Stock Issued During Period, Value, Employee Benefit Plan	2				(1)			3
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	(39)				(23)			(16)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Sep. 30, 2014	22,269		725	$ 550	9,090	13,020		(939)		(177)
Common Stock, Shares, Outstanding, end of period at Sep. 30, 2014				527,000
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)		(122)
Common Stock, Shares, Outstanding, beginning of period at Dec. 31, 2014	524,540	[3]		525,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	$ 1,449					1,449
Other Comprehensive Income (Loss), Net of Tax	34									34
Noncontrolling Interest, Period Increase (Decrease)	(2)							(2)
Dividends, Common Stock, Cash	(352)					(352)
Dividends, Preferred Stock, Cash	(48)					(48)	[2]
Treasury Stock, Shares, Acquired											(11,000)
Treasury Stock, Value, Acquired, Cost Method	(465)							(465)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period											0
Stock Issued During Period, Value, Stock Options Exercised	9				(16)			25
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures											0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	18				14	(3)		7
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	13							13
Stock Issued During Period, Shares, Employee Benefit Plan											0
Stock Issued During Period, Value, Employee Benefit Plan	3				0			3
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Sep. 30, 2015	$ 23,664		$ 1,225	$ 550	$ 9,087	$ 14,341		$ (1,451)		$ (88)
Common Stock, Shares, Outstanding, end of period at Sep. 30, 2015	514,106	[3]		514,000

[1] At September 30, 2015, includes ($1,550) million for treasury stock, ($7) million for the compensation element of restricted stock, and $106 million for noncontrolling interest.At September 30, 2014, includes ($1,015) million for treasury stock, ($27) million for the compensation element of restricted stock, and $103 million for noncontrolling interest.

[2] For the nine months ended September 30, 2015, dividends were $3,044 per share for both Perpetual Preferred Stock Series A and B, $4,406 per share for Perpetual Preferred Stock Series E, and $4,813 per share for Perpetual Preferred Stock Series F. For the nine months ended September 30, 2014, dividends were $3,044 per share for both Perpetual Preferred Stock Series A and B, and $4,406 per share for Perpetual Preferred Stock Series E.

[3] Includes restricted shares of 1,556 thousand and 2,930 thousand at September 30, 2015 and December 31, 2014, respectively.