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Rosetta Merger - Pro Forma Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2016
[1]
Mar. 31, 2015
Business Combinations [Abstract]    
Revenues $ 724 $ 894
Net Loss $ (287) $ (27)
Loss per share    
Basic (in dollars per share) $ (0.67) $ (0.07)
Diluted (in dollars per share) $ (0.67) $ (0.07)
[1] No pro forma adjustments were made for the period as the acquisition is included in the Company's historical results.