Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - (Schedule of Outstanding Awards) (Details)

v3.20.1
Stock-Based Compensation - (Schedule of Outstanding Awards) (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
Series A common stock  
Awards  
Outstanding at beginning of period (in shares) | shares 604,000
Granted (in shares) | shares 507,000
Exercised (in shares) | shares 0
Forfeited/Cancelled (in shares) | shares 0
Outstanding at end of period (in shares) | shares 1,111,000
Exercisable at end of period (in shares) | shares 418,000
WAEP  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 48.67
Granted (in dollars per share) | $ / shares 67.15
Exercised (in dollars per share) | $ / shares 0
Forfeited/Cancelled (in dollars per share) | $ / shares 0
Outstanding at end of period (in dollars per share) | $ / shares 57.11
Exercisable at end of period (in dollars per share) | $ / shares $ 46.46
Weighted average remaining life  
Outstanding at end of period 5 years 4 months 24 days
Exercisable at end of period 3 years 10 months 24 days
Aggregate intrinsic value  
Outstanding at end of period | $ $ 6
Exercisable at end of period | $ $ 4
Series B common stock  
Awards  
Outstanding at beginning of period (in shares) | shares 1,245,000
Granted (in shares) | shares 0
Exercised (in shares) | shares 0
Forfeited/Cancelled (in shares) | shares 0
Outstanding at end of period (in shares) | shares 1,245,000
Exercisable at end of period (in shares) | shares 1,245,000
WAEP  
Outstanding at beginning of period (in dollars per share) | $ / shares $ 56.14
Granted (in dollars per share) | $ / shares 0
Exercised (in dollars per share) | $ / shares 0
Forfeited/Cancelled (in dollars per share) | $ / shares 0
Outstanding at end of period (in dollars per share) | $ / shares 56.14
Exercisable at end of period (in dollars per share) | $ / shares $ 56.14
Weighted average remaining life  
Outstanding at end of period 2 years 9 months 18 days
Exercisable at end of period 2 years 9 months 18 days
Aggregate intrinsic value  
Outstanding at end of period | $ $ 5
Exercisable at end of period | $ $ 5