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Long-term Debt and Finance Leases - Senior Notes Outstanding with Early Redemption Features (Details) - Recourse Debt | Dec. 31, 2020 | Dec. 02, 2020 | May 24, 2019 | May 14, 2019 | Dec. 07, 2017 | Aug. 02, 2016 | May 23, 2016
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7.250% Senior Notes due 2026 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 7.25% |  |  |  |  |  | 7.25%
6.625% Senior Notes due 2027 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 6.625% |  |  |  |  | 6.625% |
5.750% Senior Notes due 2028 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.75% |  |  |  | 5.75% |  |
5.25% Senior Notes due 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 5.25% |  | 5.25% | 5.25% |  |  |
3.375% Senior Notes due 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage | 3.375% | 3.375% |  |  |  |  |
3.625% Senior Notes due 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate, stated percentage |  | 3.625% |  |  |  |  |

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