v3.26.3
Long-Term Debt - Senior Secured Notes due 2029 - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2026
Apr. 30, 2024
Sep. 30, 2026
Jun. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Debt Instrument [Line Items]                
Gain on extinguishment of debt           $ (94.6) $ 0.0  
Senior Secured Note, Discount Amount   $ 35.5            
Interest expense     $ 34.2   $ 53.0 123.7 163.0  
Outstanding principal amount     $ 1,951.9     1,951.9    
2029 Secured Notes [Member]                
Debt Instrument [Line Items]                
Debt instrument , Purchase Price $ 853.0              
Debt instrument call premium $ 49.0              
Debt Instrument Call Premium, Percent 6.125%              
Accrued interest $ 4.0              
Reduction to long term debt 776.2              
Gain on extinguishment of debt       $ (72.8)        
12.250 Senior Secured Notes due 2029 [Member]                
Debt Instrument [Line Items]                
Aggregate principal amount of senior notes issued $ 800.0 $ 800.0            
Debt instrument interest rate   12.25%            
Debt Instrument, Maturity Date   Apr. 15, 2029            
Senior Secured Note, Discount Percentage   2.702%            
Senior Secured Note, Discount Amount   $ 21.6            
Deferred financing costs   $ 13.9            
Non-cash interest expense         0.9 1.3 2.6  
Amortization of deferred financing costs         0.6 0.8 1.7  
Unamortized debt discount and debt issuance costs               $ 25.9
Senior secured notes, carrying amount               774.1
Fair value of notes               888.1
Interest expense         $ 26.0 $ 34.2 $ 77.8  
Outstanding principal amount               $ 800.0