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Earnings Per Share Earnings Per Share - Schedule of Basic and Diluted (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Earnings Per Share [Abstract]    
Net Income (Loss) Available to Common Stockholders, Basic $ 75 $ (1,111)
Weighted Average Number of Shares Outstanding, Basic 906 668
Earnings Per Share, Basic $ 0.08 $ (1.66)
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities $ 0  
Weighted Average Number Diluted Shares Outstanding Adjustment 1  
Net Income (Loss) Available to Common Stockholders, Diluted $ 75  
Weighted Average Number of Shares Outstanding, Diluted 907 668
Earnings Per Share, Diluted $ 0.08 $ (1.66)