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Fair Value (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Mar. 15, 2021 | Dec. 31, 2020 | May 01, 2020
--- | --- | --- | --- | ---
Interest Rate Swaps | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of derivative contracts | $ 43 |  | $ 57 |
Currency Contracts | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of derivative contracts | 42 |  | 65 |
Prior Term Loan Facility | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | 0 |  | 1,610 |
New Term Loan Facility | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | 1,295 |  | 0 |
Standard Bank Term Loan Facility | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 88 |  | 115 |
Senior Notes due 2025 |  |  |  |
Fair Value [Abstract] |  |  |  |
Interest rate | 5.75% |  |  |
Senior Notes due 2025 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 469 |  | 468 |
Senior Notes due 2026 |  |  |  |
Fair Value [Abstract] |  |  |  |
Interest rate | 6.50% |  |  |
Senior Notes due 2026 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 0 |  | 641 |
Senior Notes due 2029 |  |  |  |
Fair Value [Abstract] |  |  |  |
Interest rate | 4.63% | 4.625% |  |
Senior Notes due 2029 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 1,077 |  | 0 |
6.5% Senior Secured Notes due 2025 | Senior Notes |  |  |  |
Fair Value [Abstract] |  |  |  |
Interest rate | 6.50% |  |  | 6.50%
6.5% Senior Secured Notes due 2025 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 536 |  | 536 |
Tikon Loan | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | 11 |  | 17 |
Australian Government Loan | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | 1 |  | 1 |
MGT Loan | Fair Value, Inputs, Level 2 |  |  |  |
Fair Value [Abstract] |  |  |  |
Fair value of debt | $ 35 |  | $ 36 |

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