Consolidated Statements Of Stockholders' Equity (USD $) In Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]	Total
Balance, at Dec. 31, 2013	$ 41	$ 3,780	$ 15,410	$ 1,268			$ 20,499
Balance, shares, at Dec. 31, 2013	406
Net earnings (loss)			324			5	329
Other comprehensive loss, net of tax				(295)			(295)
Stock option exercises		11					11
Restricted stock grants, net of cancellations, shares	2
Common stock repurchased					(3)		(3)
Common stock retired		(3)			3
Common stock dividends			(90)				(90)
Share-based compensation		47					47
Share-based compensation tax benefits		1					1
Acquisition of noncontrolling interests						4,652	4,652
Distributions to noncontrolling interests						(100)	(100)
Other						(5)	(5)
Balance, at Mar. 31, 2014	41	3,836	15,644	973		4,552	25,046
Balance, shares, at Mar. 31, 2014	408
Balance, at Dec. 31, 2014	41	4,088	16,631	779		4,802	26,341
Balance, shares, at Dec. 31, 2014	409
Net earnings (loss)			(3,599)			10	(3,589)
Other comprehensive loss, net of tax				(298)			(298)
Restricted stock grants, net of cancellations, shares	2
Common stock repurchased					(18)		(18)
Common stock retired		(18)			18
Common stock dividends			(99)				(99)
Share-based compensation		48					48
Share-based compensation tax benefits		1					1
Subsidiary equity transactions		423				263	686
Distributions to noncontrolling interests						(53)	(53)
Balance, at Mar. 31, 2015	$ 41	$ 4,542	$ 12,933	$ 481		$ 5,022	$ 23,019
Balance, shares, at Mar. 31, 2015	411