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Fair-Value Measurements (Narrative) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Sep. 29, 2022 | Sep. 01, 2022
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Net loss for the period including earnings |  | $ (18,584,000) |  |  |
Senior unsecured notes | $ 3,062,955,000 | 2,856,312,000 |  |  |
Fair value of debt | 3,200,000,000 | 2,700,000,000 |  |  |
Principal | 3,823,215,000 | 3,506,284,000 |  |  |
Unrealized gain (loss) on derivatives | $ (36,635,000) | $ 5,823,000 | $ (30,700,000) |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other expense, net | Other expense, net |  |  |
Class A Convertible Preferred Stock Units |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Reset rate | 11.24% |  |  | 11.24% | 10.75%
Minimum | Class A Convertible Preferred Stock Units |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Reset rate |  |  |  | 8.75% |
Maximum | Class A Convertible Preferred Stock Units |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Reset rate | 11.24% |  |  |  |
5.875% Alkali senior secured notes due 2042 |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Principal | $ 400,000,000 |  |  |  |
Embedded Derivative Financial Instruments |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Net loss for the period including earnings |  |  | (30,800,000) |  |
Unrealized gain (loss) on derivatives |  | $ (18,600,000) | $ (30,800,000) |  |
Measurement Input, Equity Volatility |  |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |  |
Embedded derivative feature | 50 |  |  |  |

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