Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Additional Information (Details)

v3.20.2
Benefit Plans - Additional Information (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment expense $ 58 $ 65 $ 165 $ 192  
Share-based payment expense     $ 165 192  
Acquisition-related Costs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment expense       21  
Employees and Non Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grant date fair value of options (USD per share)     $ 1.42    
Options exercised in period, intrinsic value     $ 53 83  
Exercise of stock options and vesting of restricted stock units (in shares)     5    
Share-based payment expense 11 14 $ 34 49  
Restricted Stock Units (RSUs) and Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment expense 47 $ 51 131 143  
Restricted stock units vested, intrinsic value     $ 168 $ 192  
Granted (in shares)     33    
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Exercise of stock options and vesting of restricted stock units (in shares)     17    
Performance-based Share Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     3    
Restricted Stock Units Rsu And Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation costs $ 418   $ 418   $ 415
Weighted-average service period (in years)     2 years 8 months 12 days    
Maximum | Restricted Stock Units (RSUs) and Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted (in shares)     1