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Debt - 2014 and 2017 Senior Notes (Details) - USD ($) | Feb. 21, 2017 | Oct. 06, 2014 | Jun. 30, 2017
--- | --- | --- | ---
2014 Senior Notes | The 2022 Notes |  |  |
Debt |  |  |
Principal amount |  | $ 800,000,000 |
Interest rate (as a percent) |  | 5.75% |
2014 Senior Notes | The 2022 Notes | Level 2 |  |  |
Debt |  |  |
Fair value of debt instrument |  |  | $ 839,000,000
2014 Senior Notes | The 2022 Notes | Prior to October 15, 2017 |  |  |
Debt |  |  |
Redemption price percentage |  | 100.00% |
Percentage price of original principal amount of note, excluding required premium, at which note can be redeemed |  | 105.75% |
2014 Senior Notes | The 2024 Notes |  |  |
Debt |  |  |
Principal amount |  | $ 800,000,000 |
Interest rate (as a percent) |  | 5.875% |
2014 Senior Notes | The 2024 Notes | Level 2 |  |  |
Debt |  |  |
Fair value of debt instrument |  |  | $ 868,000,000
2014 Senior Notes | The 2024 Notes | Prior to July 15 2024 |  |  |
Debt |  |  |
Redemption price percentage |  | 100.00% |
2014 Senior Notes | The 2024 Notes | On or after July 15, 2024 |  |  |
Debt |  |  |
Redemption price percentage |  | 100.00% |
2017 Senior Notes |  |  |
Debt |  |  |
Principal amount | $ 1,000,000,000 |  |
Interest rate (as a percent) | 5.125% |  | 5.125%
Long-term Debt |  |  | $ 926,000
2017 Senior Notes | Term loan A |  |  |
Debt |  |  |
Amount of debt redeemed | $ 600,000,000 |  |
2017 Senior Notes | Term loan B |  |  |
Debt |  |  |
Amount of debt redeemed | 127,600,000 |  |
2017 Senior Notes | Revolving credit facility |  |  |
Debt |  |  |
Amount of debt redeemed | $ 250,000,000 |  |
2017 Senior Notes | Level 2 |  |  |
Debt |  |  |
Fair value of debt instrument |  |  | 1,003,800,000
2017 Senior Notes | Prior to December 15, 2026 |  |  |
Debt |  |  |
Redemption price percentage | 100.00% |  |
2017 Senior Notes | Prior to March 15, 2020 |  |  |
Debt |  |  |
Percentage price of original principal amount of note, excluding required premium, at which note can be redeemed | 105.125% |  |
2017 Senior Notes | On or after December 15, 2026 |  |  |
Debt |  |  |
Redemption price percentage | 100.00% |  |
Registered Senior Notes 2017 |  |  |
Debt |  |  |
Principal amount |  |  | $ 999,074,000
Maximum | 2014 Senior Notes | The 2022 Notes | Prior to October 15, 2017 |  |  |
Debt |  |  |
Percentage of principal amount that can be redeemed |  | 35.00% |
Maximum | 2017 Senior Notes | Prior to March 15, 2020 |  |  |
Debt |  |  |
Percentage of principal amount that can be redeemed | 35.00% |  |

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