Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic EPS
Income (loss) from continuing operations	$ 117	$ (360)
Discontinued operations, net		438
Net income (loss)	117	78
Net income, net of participating securities	$ 117	$ 78
Weighted average number of basic shares	764.4	763.4
Basic EPS (in dollars per share)	$ 0.15	$ 0.10
Diluted EPS
Net income, net of participating securities	$ 117	$ 78
Weighted average number of basic shares	764.4	763.4
Dilutive effect of potentially dilutive securities (in shares)	0.8
Total diluted weighted average common shares	765.2	763.4
Diluted EPS (in dollars per share)	$ 0.15	$ 0.10