Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.5.0.2
Stock-Based Compensation (Details)
$ / shares in Units, $ in Millions
 6 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
shares
Options  
Options granted (in shares) 0
Unrecognized compensation cost options | $ $ 19
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 7 months 6 days
Common Stock, Capital Shares Reserved for Future Issuance 3,100,000
2014 Plan | Awards | Class A common stock  
Options  
Outstanding beginning balance (in shares) 630,000
Exercised (in shares) (82,000)
Outstanding ending balance (in shares) 548,000
Number of awards exercisable (in shares) 527,000
WAEP Outstanding beginning balance (in dollars per share) | $ / shares $ 32.36
WAEP options exercised (in dollars per share) | $ / shares 31.87
WAEP Outstanding ending balance (in dollars per share) | $ / shares 32.43
WAEP options exercisable (in dollars per share) | $ / shares $ 32.28
Weighted average remaining contractual life outstanding 2 years 8 months 12 days
Weighted average remaining contractual life exercisable 2 years 7 months 6 days
Aggregate intrinsic value outstanding | $ $ 15
Aggregate intrinsic value exercisable | $ $ 14
2014 Plan | Awards | Class C common stock  
Options  
Outstanding beginning balance (in shares) 2,761,000
Exercised (in shares) (196,000)
Outstanding ending balance (in shares) 2,565,000
Number of awards exercisable (in shares) 994,000
WAEP Outstanding beginning balance (in dollars per share) | $ / shares $ 41.09
WAEP options exercised (in dollars per share) | $ / shares 32.09
WAEP Outstanding ending balance (in dollars per share) | $ / shares 41.78
WAEP options exercisable (in dollars per share) | $ / shares $ 32.21
Weighted average remaining contractual life outstanding 6 years 1 month 6 days
Weighted average remaining contractual life exercisable 2 years 7 months 6 days
Aggregate intrinsic value outstanding | $ $ 47
Aggregate intrinsic value exercisable | $ $ 28