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