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Fair Value of Financial Instruments - Schedule of Estimated Fair Value of Financial Instruments, by Balance Sheet Grouping (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Carrying Amount    
Assets:    
Cash and cash equivalents $ 123 $ 37
Investments in equity securities 78 69
Available-for-sale debt securities 231 192
Trading securities 5 5
Carrying Amount | Senior Notes | Senior Notes at 6.875% Due 2028    
Liabilities:    
Notes payable, fair value disclosure 42 622
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 8%, Due 2027    
Liabilities:    
Notes payable, fair value disclosure 0 696
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 5.625% due 2027    
Liabilities:    
Notes payable, fair value disclosure 14 1,722
Carrying Amount | Senior Secured Notes | Senior Notes at 6% Due 2029    
Liabilities:    
Notes payable, fair value disclosure 629 626
Carrying Amount | Senior Secured Notes | Senior Secured Notes 5.250%, Due 2030    
Liabilities:    
Notes payable, fair value disclosure 1,476 1,468
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 4.750% Due 2031    
Liabilities:    
Notes payable, fair value disclosure 1,055 1,054
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 10.875%, Due 2032    
Liabilities:    
Notes payable, fair value disclosure 2,213 2,212
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 10.750% Due 2033    
Liabilities:    
Notes payable, fair value disclosure 698  
Carrying Amount | Senior Secured Notes | Senior Secured Notes at 9.75% Due 2034    
Liabilities:    
Notes payable, fair value disclosure 1,761  
Carrying Amount | Junior-Priority Secured Notes | Junior-Priority Secured Notes at 6.875% Due 2029    
Liabilities:    
Notes payable, fair value disclosure 1,186 1,175
Carrying Amount | Junior-Priority Secured Notes | Junior-Priority Secured Notes at 6.125% Due 2030    
Liabilities:    
Notes payable, fair value disclosure 1,181 1,175
Carrying Amount | ABL Facility and Other Debt    
Liabilities:    
Notes payable, fair value disclosure 11 359
Estimated Fair Value    
Assets:    
Cash and cash equivalents 123 37
Investments in equity securities 78 69
Available-for-sale debt securities 231 192
Trading securities 5 5
Estimated Fair Value | Senior Notes | Senior Notes at 6.875% Due 2028    
Liabilities:    
Notes payable, fair value disclosure 34 457
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 8%, Due 2027    
Liabilities:    
Notes payable, fair value disclosure 0 700
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 5.625% due 2027    
Liabilities:    
Notes payable, fair value disclosure 14 1,686
Estimated Fair Value | Senior Secured Notes | Senior Notes at 6% Due 2029    
Liabilities:    
Notes payable, fair value disclosure 625 577
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes 5.250%, Due 2030    
Liabilities:    
Notes payable, fair value disclosure 1,389 1,261
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 4.750% Due 2031    
Liabilities:    
Notes payable, fair value disclosure 915 822
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 10.875%, Due 2032    
Liabilities:    
Notes payable, fair value disclosure 2,358 2,299
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 10.750% Due 2033    
Liabilities:    
Notes payable, fair value disclosure 721  
Estimated Fair Value | Senior Secured Notes | Senior Secured Notes at 9.75% Due 2034    
Liabilities:    
Notes payable, fair value disclosure 1,838  
Estimated Fair Value | Junior-Priority Secured Notes | Junior-Priority Secured Notes at 6.875% Due 2029    
Liabilities:    
Notes payable, fair value disclosure 992 940
Estimated Fair Value | Junior-Priority Secured Notes | Junior-Priority Secured Notes at 6.125% Due 2030    
Liabilities:    
Notes payable, fair value disclosure 891 842
Estimated Fair Value | ABL Facility and Other Debt    
Liabilities:    
Notes payable, fair value disclosure $ 11 $ 359