Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Basic EPS
Income (loss) from continuing operations	$ (136)	$ 180	$ (496)	$ (35)
Discontinued operations, net	(3)	(4)	435	(7)
NET INCOME (LOSS)	(139)	176	(61)	(42)
Net income (loss), net of participating securities	$ (139)	$ 176	$ (61)	$ (42)
Weighted average number of basic shares	763.6	766.4	763.5	768.0
Basic EPS (in dollars per share)	$ (0.18)	$ 0.23	$ (0.08)	$ (0.05)
Diluted EPS
Net income (loss), net of participating securities	$ (139)	$ 176	$ (61)	$ (42)
Weighted average number of basic shares	763.6	766.4	763.5	768.0
Dilutive effect of potentially dilutive securities (in shares)		0.2
Total diluted weighted average common shares	763.6	766.6	763.5	768.0
Diluted EPS (in dollars per share)	$ (0.18)	$ 0.23	$ (0.08)	$ (0.05)