Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensations (Grants) (Details)

v3.10.0.1
Stock-Based Compensations (Grants) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Common Class A    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding options 32,361  
Options granted 4,697  
Options exercised (3,640)  
Options forfeited/cancelled (1,726)  
Outstanding options 31,692  
Exercisable options 19,518  
Outstanding WAEP $ 24.57 $ 23.48
WAEP granted 26.85  
WAEP exercised 16.66  
WAEP forfeited/cancelled 26.92  
Exercisable WAEP $ 23.99  
Weighted average remaining life - options outstanding 3 years 8 months 12 days  
Weighted average remaining life - options exercisable 2 years 8 months 12 days  
Aggregate intrinsic value of options outstanding $ 41  
Aggregate intrinsic value of options exercisable $ 35  
Common Class B    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding options 1,643  
Options granted 175  
Outstanding options 1,818  
Exercisable options 997  
Outstanding WAEP $ 27.22 $ 27.16
WAEP granted 27.77  
Exercisable WAEP $ 25.40  
Weighted average remaining life - options outstanding 3 years 8 months 12 days  
Weighted average remaining life - options exercisable 4 years 7 months 6 days  
Liberty Ventures common stock    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding options 0