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Long-term Debt and Finance Leases - Redemptions (Details) - USD ($) |  | 1 Months Ended
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Aug. 24, 2021 | Nov. 04, 2021
Debt Instrument, Redemption [Line Items] |  |
Principal Repurchased | $ 1,400,000,000 |
Cash paid | $ 1,400,000,000 |
Senior Notes, due 2026 |  |
Debt Instrument, Redemption [Line Items] |  |
Interest rate, stated percentage | 7.25% |
Principal Repurchased | $ 1,000,000,000 |
Cash paid | $ 1,056,000,000 |
Average Early Redemption Percentage | 103.625% |
Senior Notes, due 2027 |  |
Debt Instrument, Redemption [Line Items] |  |
Interest rate, stated percentage | 6.625% |
Principal Repurchased | $ 355,000,000 |
Cash paid | $ 369,000,000 |
Average Early Redemption Percentage | 103.313% |
Senior Notes, due 2027 | Subsequent Event |  |
Debt Instrument, Redemption [Line Items] |  |
Interest rate, stated percentage |  | 6.625%
Principal Repurchased |  | $ 500,000,000
Cash paid |  | $ 524,000,000
Average Early Redemption Percentage |  | 103.313%
Senior Notes |  |
Debt Instrument, Redemption [Line Items] |  |
Principal Repurchased | $ 1,355,000,000 |
Cash paid | 1,425,000,000 |
Accrued interest | $ 22,000,000 |
Senior Notes | Subsequent Event |  |
Debt Instrument, Redemption [Line Items] |  |
Principal Repurchased |  | $ 1,855,000,000
Cash paid |  | 1,949,000,000
Accrued interest |  | $ 29,000,000

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