Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Basic earnings (loss) per common share
Income (loss) from continuing operations	$ (360)	$ (215)
Discontinued operations, net	438	(3)
NET INCOME (LOSS)	78	(218)
Net income attributable to common stock, net of participating securities	$ 78	$ (218)
Weighted average number of basic shares	763.4	769.6
Basic EPS (in dollars per share)	$ 0.10	$ (0.28)
Diluted earnings (loss) per common share
Net income attributable to common stock, net of participating securities	$ 78	$ (218)
Weighted average number of basic shares	763.4	769.6
Total diluted weighted average common shares	763.4	769.6
Diluted EPS (in dollars per share)	$ 0.10	$ (0.28)