v3.6.0.2
Acquisitions and Divestments - Schedule of Pro Forma Financial Information Presents Combined Consolidated Results of Operations (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Business Combinations [Abstract]    
Revenue $ 9,850 $ 9,904
Net income (loss) attributable to stockholders $ (84) $ (277)
Net income (loss) per common share attributable to stockholders:    
- Basic $ (0.25) $ (0.81)
- Diluted $ (0.25) $ (0.81)