Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.20.4
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
May 23, 2018
Jun. 02, 2015
Stock-based compensation          
Total unrecognized compensation cost related to unvested Awards $ 106        
Weighted average period of recognition related to unvested equity awards (in years) 1 year 10 months 24 days        
Shares reserved for future issuance upon exercise of stock options 43,800,000     8,150,000,000 8,965,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 7 $ 2 $ 28    
Common Class A          
Stock-based compensation          
Shares reserved for future issuance upon exercise of stock options       4,000,000,000  
Common Class B          
Stock-based compensation          
Shares reserved for future issuance upon exercise of stock options       150,000,000  
RSA and RSU          
Stock-based compensation          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 17 $ 25 $ 64    
RSA and RSU | Common Class A          
Stock-based compensation          
Nonvested awards, number 12,700,000        
RSUs GDFV $ 7.32        
RSA and RSU | 8.0% Series A Cumulative Redeemable Preferred Stock          
Stock-based compensation          
Nonvested awards, number 373        
Restricted Stock Units (RSUs) | 8.0% Series A Cumulative Redeemable Preferred Stock          
Stock-based compensation          
Nonvested awards, number 300        
Incremental cost $ 48.88