Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Additional Information (Details)

v3.20.1
Benefit Plans - Additional Information (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Business Acquisition [Line Items]      
Share-based payment expense $ 55 $ 70  
Share-based payment expense $ 55 70  
Employees and Non Employee Stock Option      
Business Acquisition [Line Items]      
Grant date fair value of options (in dollars per share) $ 1.41    
Options exercised in period, intrinsic value $ 32 10  
Exercise of stock options and vesting of restricted stock units (in shares) 3    
Share-based payment expense $ 11 20  
Restricted Stock Units (RSUs) and Performance Shares      
Business Acquisition [Line Items]      
Share-based payment expense 44 50  
Restricted stock units vested, intrinsic value $ 58 74  
Granted (in shares) 6    
Restricted Stock Units (RSUs)      
Business Acquisition [Line Items]      
Exercise of stock options and vesting of restricted stock units (in shares) 5    
Performance-based Share Awards      
Business Acquisition [Line Items]      
Granted (in shares) 3    
Restricted Stock Units Rsu And Stock Options      
Business Acquisition [Line Items]      
Unrecognized compensation costs $ 397   $ 415
Weighted-average service period (in years) 2 years 3 months 18 days    
Acquisition-related Costs      
Business Acquisition [Line Items]      
Share-based payment expense   $ 21  
Maximum | Restricted Stock Units (RSUs) and Performance Shares      
Business Acquisition [Line Items]      
Restricted stock units granted (in shares) 1