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Long-term Debt and Finance Leases - Issuance of Senior Notes (Details) - Recourse Debt - USD ($) | Dec. 02, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | May 28, 2019 | May 24, 2019 | May 14, 2019
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3.375% Senior Notes Due 2029 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount | $ 500,000,000 |  |  |  |  |
Interest rate, stated percentage | 3.375% | 3.375% |  |  |  |
3.625% Senior Unsecured Notes Due 2031 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount | $ 1,000,000,000.0 |  |  |  |  |
Interest rate, stated percentage | 3.625% | 3.625% |  |  |  |
Senior Secured First Lien Notes due 2025 to 2027 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount | $ 1,400,000,000 |  |  |  |  |
Basis point increase to interest rate | 0.25% |  |  |  |  |
Senior Secured First Lien Notes, due 2025 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount | $ 500,000,000 |  |  |  |  |
Interest rate, stated percentage | 2.00% | 2.00% |  |  |  |
Senior Secured First Lien Notes, due 2027 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount | $ 900,000,000 |  |  |  |  |
Interest rate, stated percentage | 2.45% | 2.45% |  |  |  |
5.25% Senior Notes due 2029 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 733,000,000
Interest rate, stated percentage |  | 5.25% |  |  | 5.25% | 5.25%
6.25% Senior Notes due 2024 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage |  | 6.25% | 6.25% |  |  |
Senior Secured First Lien Notes, Due 2024 and 2029 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  |  | $ 1,100,000,000 |  |
Senior Secured First Lien Notes, Due 2024 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  |  | $ 600,000,000 |  |
Interest rate, stated percentage |  | 3.75% |  | 2.75% |  |
Senior Secured First Lien Notes, Due 2029 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount |  |  |  | $ 500,000,000 |  |
Interest rate, stated percentage |  | 4.45% |  | 4.45% |  |

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