Consolidated Statements of Stockholders' Deficit (USD $) In Millions, except Share data	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Deficit [Member]	Equity Attributable to Noncontrolling Interests [Member]
Balance at Dec. 31, 2011	$ (7,014)	$ 4	$ 1,601	$ (440)	$ (9,423)	$ 1,244
Balance, shares at Dec. 31, 2011		437,478,000
Comprehensive income	1,989			(17)	1,605	401
Share-based benefit plans	169		169
Share-based benefit plans, shares		5,722,000
Distributions	(3,543)				(3,142)	(401)
Other	58		(17)			75
Balance at Dec. 31, 2012	(8,341)	4	1,753	(457)	(10,960)	1,319
Balance, shares at Dec. 31, 2012		443,200,000
Comprehensive income	2,196			200	1,556	440
Repurchase of common stock	(500)		(500)
Repurchase of common stock, shares		(10,656,000)
Share-based benefit plans	139		139
Share-based benefit plans, shares		7,060,000
Distributions	(435)					(435)
Other	13		(6)		1	18
Balance at Dec. 31, 2013	(6,928)	4	1,386	(257)	(9,403)	1,342
Balance, shares at Dec. 31, 2013		439,604,000
Comprehensive income	2,307			(66)	1,875	498
Repurchase of common stock	(1,750)		(1,701)		(49)
Repurchase of common stock, shares		(28,583,000)
Share-based benefit plans	321		321
Share-based benefit plans, shares		9,457,000
Distributions	(442)					(442)
Other	(6)		(6)		2	(2)
Balance at Dec. 31, 2014	$ (6,498)	$ 4		$ (323)	$ (7,575)	$ 1,396
Balance, shares at Dec. 31, 2014		420,478,000