Stock-Based Compensation (Details) - Segment [Domain] - USD ($)
$ / shares in Units, $ in Millions |
|
3 Months Ended |
6 Months Ended |
Jul. 23, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
| Stock-based compensation |
听
|
$ 47
|
$ 49
|
$ 91
|
$ 98
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |
听
|
听
|
听
|
0.00%
|
听
|
| Common Class A |
听
|
听
|
听
|
听
|
听
|
| Shares received in exchange |
2
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
0
|
听
|
| Common Class B |
听
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
0
|
听
|
| Common Class C |
听
|
听
|
听
|
听
|
听
|
| Shares received in exchange |
2
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
2,362,000
|
听
|
| Granted, WAEP |
听
|
听
|
听
|
$ 38.29
|
听
|
| Common Class C | Tranche One |
听
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
676,000
|
听
|
| Weighted average grant-date fair value |
听
|
听
|
听
|
$ 10.86
|
听
|
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |
听
|
听
|
听
|
3 years
|
听
|
| Common Class C | Tranche Two |
听
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
1,300,000
|
听
|
| Weighted average grant-date fair value |
听
|
听
|
听
|
$ 15.52
|
听
|
| Vesting percentage |
听
|
听
|
听
|
50.00%
|
听
|
| CEO | Common Class C | Tranche Three |
听
|
听
|
听
|
听
|
听
|
| Options granted |
听
|
听
|
听
|
420,000
|
听
|
| Restricted stock granted |
听
|
听
|
听
|
34,000
|
听
|
| Weighted average grant-date fair value |
听
|