Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Additional Information (Details)

v3.21.2
Benefit Plans - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment expense $ 47 $ 52 $ 98 $ 107  
Share-based payment expense     $ 98 107  
Employees and Non Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grant date fair value of options ( in USD per share)     $ 1.78    
Options exercised in period, intrinsic value     $ 130 39  
Exercise of stock options and vesting of restricted stock units (in shares)     18,000,000    
Share-based payment expense 11 12 $ 22 23  
Restricted Stock Units (RSUs) and Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment expense 36 $ 40 76 84  
Restricted stock units vested, intrinsic value     $ 54 $ 77  
Granted (in shares)     13,000,000    
Restricted Stock Units (RSUs) and Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted (in shares)     1,000,000    
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)     5,000,000    
Performance-based Share Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     7,000,000    
Restricted Stock Units Rsu And Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation costs $ 413   $ 413   $ 385
Weighted-average service period (in years)     2 years 2 months 12 days