Consolidated Statements of Changes in Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning Balance at Dec. 31, 2011		$ 8	$ (489)	$ 8,507	$ 678	$ (2,758)	$ 3,783
Beginning Balance (Shares) at Dec. 31, 2011		807,600,000	42,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(357)				(912)		555
Total change in fair value of available-for-sale securities, net of income tax						0
Total foreign currency translation adjustment, net of income tax	(210)					(90)	(120)
Total change in derivative fair value, including a reclassification to earnings, net of income tax	43					53	(10)
Total pension adjustments, net of income tax	(564)					(125)	(439)
OTHER COMPREHENSIVE INCOME (LOSS)	(731)					(162)	(569)
Capital contributions from noncontrolling interests							30
Distributions to noncontrolling interests							(802)
Disposition of businesses							(44)
Acquisition of treasury stock			(301)
Acquisition of treasury stock (shares)			24,800,000
Issuance and exercise of stock-based compensation benefit plans, net of income tax			10	37
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares)		3,100,000	(800,000)
Dividends declared on common stock				(30)	(30)
Sale of subsidiary shares to noncontrolling interests				7			5
Acquisition of subsidiary shares from noncontrolling interests				4			(13)
Ending Balance at Dec. 31, 2012		8	(780)	8,525	(264)	(2,920)	2,945
Ending Balance (Shares) at Dec. 31, 2012		810,700,000	66,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	551				114		437
Total foreign currency translation adjustment, net of income tax	(334)					(227)	(107)
Total change in derivative fair value, including a reclassification to earnings, net of income tax	247					174	73
Total pension adjustments, net of income tax	431					91	340
OTHER COMPREHENSIVE INCOME (LOSS)	344					38	306
Capital contributions from noncontrolling interests							109
Distributions to noncontrolling interests							(553)
Disposition of businesses							(13)
Acquisition of treasury stock			(322)
Acquisition of treasury stock (shares)			25,300,000
Issuance and exercise of stock-based compensation benefit plans, net of income tax			13	33
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares)		2,600,000	(900,000)
Dividends declared on common stock				(125)	0
Sale of subsidiary shares to noncontrolling interests	16			16			91
Acquisition of subsidiary shares from noncontrolling interests	(6)			(6)			(1)
Ending Balance at Dec. 31, 2013	7,651	8	(1,089)	8,443	(150)	(2,882)	3,321
Ending Balance (Shares) at Dec. 31, 2013		813,300,000	90,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,147				769		378
Total foreign currency translation adjustment, net of income tax	(494)					(332)	(162)
Total change in derivative fair value, including a reclassification to earnings, net of income tax	(259)					(108)	(151)
Total pension adjustments, net of income tax	(20)					(4)	(16)
OTHER COMPREHENSIVE INCOME (LOSS)	(773)					(444)	(329)
Balance sheet reclassification related to an equity method investment	40
Capital contributions from noncontrolling interests							147
Distributions to noncontrolling interests							(466)
Disposition of businesses							(153)
Acquisition of treasury stock			(308)
Acquisition of treasury stock (shares)	21,900,246		21,900,000
Issuance and exercise of stock-based compensation benefit plans, net of income tax			26	3
Issuance of common stock under benefit plans and exercise of stock options, net of income tax (shares)		1,200,000	(2,000,000)
Dividends declared on common stock				(73)	(107)
Sale of subsidiary shares to noncontrolling interests	29			29			173
Acquisition of subsidiary shares from noncontrolling interests	7			7			(18)
Ending Balance at Dec. 31, 2014	$ 7,325	$ 8	$ (1,371)	$ 8,409	$ 512	$ (3,286)	$ 3,053
Ending Balance (Shares) at Dec. 31, 2014		814,500,000	110,700,000