Discontinued Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenues from discontinued operations	$ 0	$ 677,000,000	$ 1,695,000,000
Earnings (loss) from discontinued operations, net of tax [Abstract]
Earnings (loss) from discontinued operations	17,000,000	79,000,000	(12,000,000)
Income tax provision, discontinued operations	(7,000,000)	(26,000,000)	0
Earnings (loss) from discontinued operations, net of tax	10,000,000	53,000,000	(12,000,000)
Gain on disposal, net of tax [Abstract]
Gain on disposal	0	1,557,000,000	159,000,000
Income tax provision on disposal	0	0	(6,000,000)
Gain on disposal, net of tax	0	1,557,000,000	153,000,000
Net earnings from discontinued operations attributable to noncontrolling interest, net of tax	0	5,000,000	0
Net earnings (loss) from discontinued operations, net of tax	10,000,000	1,605,000,000	$ 141,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Noncurrent liabilities, discontinued operations	$ 72,000,000	$ 118,000,000