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Debt - Senior Notes (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 06, 2021 | Feb. 28, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from issuance of the Senior Notes, net of discount |  |  | $ 490,625,000 | $ 0 | $ 0
7.25% Senior Notes due 2026 | Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount of debt instrument | $ 500,000,000 |  |  |  |
7.25% Senior Notes due 2026 | Senior Notes | Subsequent Event |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount of debt instrument |  | $ 200,000,000 |  |  |
Stated interest rate (as a percent) |  | 7.25% |  |  |
Proceeds from issuance of the Senior Notes, net of discount |  | $ 200,000,000 |  |  |
7.25% Senior Notes due 2026 | Senior Notes | On or After May 1, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage of principal amount redeemable (as a percent) | 40.00% |  |  |  |
Redemption price, percentage (as a percent) | 107.25% |  |  |  |
7.25% Senior Notes due 2026 | Senior Notes | Prior to May 1, 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redemption price, percentage (as a percent) | 100.00% |  |  |  |
7.25% Senior Notes due 2026 | Senior Notes | Independence Energy Finance LLC |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Face amount of debt instrument | $ 500,000,000 |  |  |  |
Stated interest rate (as a percent) | 7.25% |  |  |  |

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