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Debt - Public Debt (Details) - USD ($) |  |  | 217 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 06, 2020 | Apr. 06, 2020 | Mar. 25, 2020 | May 05, 2020 | May 06, 2020 | Apr. 24, 2020 | Apr. 22, 2020 | Mar. 31, 2020 | Feb. 07, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 250,000,000 |
Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Early termination premium |  | $ 35,000,000 |  | $ 35,000,000 |  |  |  |  |
Interest expense |  | $ 17,000,000 |  | $ 4,000,000 |  |  |  |  |
6.125% Notes, due 2028 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) |  |  |  |  |  |  |  | 6.125% |
6.125% Notes, due 2028 | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  | $ 600,000,000
Long-term debt, interest rate (percentage) |  |  |  |  |  |  |  |  | 6.125%
Senior secured first-lien term loan B facility | Line of Credit | Secured Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 600,000,000 |  |  |  |  |  |
Debt term |  |  | 7 years |  |  |  |  |  |
Mandatory repayment percentage (percent) |  |  | 1.00% |  |  |  |  |  |
Borrowing increments subject to fixed mandatory repayment percentage |  |  | $ 6,000,000 |  |  |  |  |  |
Senior secured first-lien term loan B facility | Line of Credit | Secured Debt | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread (percentage |  |  | 2.75% |  |  |  |  |  |
6.150% Notes, due 2020 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) |  |  |  |  |  |  |  | 6.15% |
6.150% Notes, due 2020 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) | 6.15% | 6.15% |  |  |  |  |  |  |
Early redemption of debt | $ 1,000,000,000 |  |  |  |  |  |  |  |
Payment for early redemption of debt | $ 1,020,000,000 |  |  |  |  |  |  |  |
5.400% Notes due 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) |  |  |  |  |  |  |  | 5.40% |
5.400% Notes due 2021 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) | 5.40% | 5.40% |  | 5.40% |  |  | 5.40% |  |
Early redemption of debt | $ 300,000,000 |  |  |  |  |  |  |  |
Payment for early redemption of debt | $ 315,000,000 |  |  |  |  |  |  |  |
Cash tender offer and consent solicitation for debt |  |  |  |  |  |  | $ 785,000,000 |  |
Amount of debt tendered |  |  |  | $ 561,000,000 |  |  |  |  |
6.875% Notes Due 2025 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 1,200,000,000 |  |  |
Long-term debt, interest rate (percentage) |  |  |  |  |  | 6.875% |  |  |
Deferred financing costs |  |  |  |  |  | $ 15,000,000 |  |  |
5.870% Notes, due 2022 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) |  |  |  |  |  |  |  | 5.87% |
5.870% Notes, due 2022 | Subsequent Event |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, interest rate (percentage) |  |  |  | 5.87% |  |  | 5.87% |  |
Cash tender offer and consent solicitation for debt |  |  |  | $ 210,000,000 | $ 300,000,000 |  | $ 210,000,000 |  |
Amount of debt tendered |  |  |  | $ 147,000,000 |  |  |  |  |

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