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Fair Value Measurement (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 15, 2021 | May 01, 2020
--- | --- | --- | --- | ---
Interest rate swaps | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative asset | $ 30 | $ 0 |  |
Fair value of derivative contracts | 0 | 25 |  |
Natural gas hedges | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative asset | 1 | 1 |  |
Fair value of derivative contracts | 2 | 0 |  |
Foreign currency contracts | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Derivative asset | 1 | 3 |  |
Fair value of derivative contracts | 0 | 1 |  |
Term Loan Facility | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | 876 | 895 |  |
2022 Term Loan Facility | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | 388 | 0 |  |
Standard Bank Term Loan Facility | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | $ 77 | 92 |  |
Senior Notes due 2029 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Annual Interest Rate | 4.63% |  | 4.625% |
Senior Notes due 2029 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | $ 893 | 1,071 |  |
6.5% Senior Secured Notes due 2025 | Senior Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Annual Interest Rate | 6.50% |  |  | 6.50%
6.5% Senior Secured Notes due 2025 | Fair Value, Inputs, Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | $ 0 | 526 |  |
Australian Government Loan | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | 1 | 1 |  |
MGT Loan | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value of debt | $ 30 | $ 33 |  |

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