v3.20.2
Summary of Significant Accounting Policies - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Sale of Common Stock Attributable to Common Stockholders (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Net income (loss) per share of common stock attributable to common stockholders, basic        
Net income (loss) attributable to common stockholders $ 104 $ (408) $ 120 $ (1,110)
Less: Buy-out of noncontrolling interest       8
Net income (loss) used in computing net income (loss) per share of common stock, basic $ 104 $ (408) $ 120 $ (1,118)
Weighted average shares used in computing net income (loss) per share of common stock, basic 186 177 184 175
Net income (loss) per share of common stock attributable to common stockholders, basic $ 0.56 $ (2.31) $ 0.65 $ (6.40)
Net income (loss) per share of common stock attributable to common stockholders, diluted        
Net income (loss) attributable to common stockholders $ 104 $ (408) $ 120 $ (1,110)
Less: Buy-out of noncontrolling interest       8
Net income (loss) used in computing net income (loss) per share of common stock, diluted $ 104 $ (408) $ 120 $ (1,118)
Weighted average shares used in computing net income (loss) per share of common stock, basic 186 177 184 175
Stock-based awards 10   10  
Convertible senior notes 8   7  
Warrants 3   2  
Weighted average shares used in computing net income (loss) per share of common stock, diluted 207 177 203 175
Net income (loss) per share of common stock attributable to common stockholders, diluted $ 0.50 $ (2.31) $ 0.59 $ (6.40)