Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Senior Secured Notes due 2029 - Additional Information (Detail)

v3.24.3
Long-Term Debt - Senior Secured Notes due 2029 - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 15, 2026
Apr. 30, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Debt Instrument [Line Items]            
Senior Secured Note, Discount Amount   $ 35.5        
Interest expense     $ 59.4 $ 41.7 $ 161.4 $ 124.6
Outstanding principal amount     2,337.5   2,337.5  
12.250 Senior Secured Notes due 2029 [Member]            
Debt Instrument [Line Items]            
Aggregate principal amount of senior notes issued   $ 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     0.8   1.5  
Amortization of deferred financing costs     0.5   0.9  
Unamortized debt discount and debt issuance costs     13.0   13.0  
Senior secured notes, carrying amount     766.9   766.9  
Fair value of notes     803.8   803.8  
Interest expense     25.8   48.4  
Outstanding principal amount     $ 800.0   $ 800.0  
12.250 Senior Secured Notes due 2029 [Member] | Scenario Forecast [Member]            
Debt Instrument [Line Items]            
Senior notes, redemption price, percentage 100.00%          
Senior notes, redemption price percentage with equity offerings 112.25%          
12.250 Senior Secured Notes due 2029 [Member] | Scenario Forecast [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Percentage of aggregate principal amount of senior notes being redeemed 40.00%