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Long-Term Debt - Senior Notes Narratives (Details) - Senior Notes - 6.125% Senior Notes - USD ($) | Jun. 30, 2021 | Jun. 16, 2020 | Nov. 06, 2018 | Nov. 01, 2018
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Debt Instrument |  |  |  |
Stated interest rate (in percentage) | 6.125% | 6.125% | 6.125% |
Debt instrument face amount |  |  | $ 550,000,000.0 |
Debt price level (in percentage) |  |  |  | 98.94%
Debt instrument yield (in percentage) |  |  | 6.375% |

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