Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Additional Information (Details)

v3.19.3.a.u2
Stock-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
May 23, 2018
Jun. 02, 2015
Stock-based compensation          
Total unrecognized compensation cost related to unvested Awards $ 46        
Weighted average period of recognition related to unvested equity awards (in years) 1 year 8 months 12 days        
Shares reserved for future issuance upon exercise of stock options   25.1   8,150.0 8,965.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 2 $ 28 $ 145    
Restricted Stock          
Stock-based compensation          
Nonvested awards, number 5.4        
RSUs GDFV $ 18.58        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 25 $ 64 23    
Option exchange          
Stock-based compensation          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value     $ 104