Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2013	$ 20,499	$ 41	$ 3,780	$ 15,410	$ 1,268
Balance, shares at Dec. 31, 2013		406
Net earnings (loss)	1,691			1,607			$ 84
Other comprehensive earnings (loss), net of tax	(489)				(489)
Stock option exercises	93		93
Stock option exercises, shares		1
Restricted stock grants, net of cancellations, shares		2
Common stock repurchased	(27)					$ (27)
Common stock retired			(27)			27
Common stock dividends	(386)			(386)
Share-based compensation	151		151
Share-based compensation tax expense	(3)		(3)
Acquisition of noncontrolling interests	4,670						4,670
Subsidiary equity transactions	370		93				277
Distributions to noncontrolling interests	(235)						(235)
Other	7		1				6
Balance at Dec. 31, 2014	26,341	$ 41	4,088	16,631	779		4,802
Balance, shares at Dec. 31, 2014		409
Net earnings (loss)	(15,203)			(14,454)			(749)
Other comprehensive earnings (loss), net of tax	(549)				(549)
Stock option exercises	4		4
Restricted stock grants, net of cancellations, shares		2
Common stock repurchased	(35)					(35)
Common stock retired			(35)			35
Common stock dividends	(396)			(396)
Common stock issued	199	$ 1	198
Common stock issued, shares		7
Share-based compensation	165		165
Share-based compensation tax expense	(9)		(9)
Subsidiary equity transactions	726		585				141
Distributions to noncontrolling interests	(254)						(254)
Balance at Dec. 31, 2015	10,989	$ 42	4,996	1,781	230		3,940
Balance, shares at Dec. 31, 2015		418
Net earnings (loss)	(3,704)			(3,302)			(402)
Other comprehensive earnings (loss), net of tax	54				54
Restricted stock grants, net of cancellations, shares		2
Common stock repurchased	(28)					(28)
Common stock retired			(28)			$ 28
Common stock dividends	(221)		(96)	(125)
Common stock issued	2,127	$ 10	2,117
Common stock issued, shares		103
Share-based compensation	168		168
Subsidiary equity transactions	1,294		80				1,214
Distributions to noncontrolling interests	(304)						(304)
Balance at Dec. 31, 2016	$ 10,375	$ 52	$ 7,237	$ (1,646)	$ 284		$ 4,448
Balance, shares at Dec. 31, 2016		523