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Financial Instruments - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Parenthetical) (Details)
Sep. 30, 2025
9.000% Second-Priority Senior Secured Notes due February 2029  
Debt Instrument [Line Items]  
Debt instrument interest rate 9.00%
9.375% Second-Priority Senior Secured Notes due February 2031  
Debt Instrument [Line Items]  
Debt instrument interest rate 9.375%