XML 57 R50.htm IDEA: XBRL DOCUMENT v3.25.1
Fair Value Measurements and Derivative Instruments - Additional Information (Details)
gal in Millions, $ in Millions
6 Months Ended
Apr. 30, 2025
gal
Mar. 31, 2025
USD ($)
gal
Sep. 30, 2024
USD ($)
Aug. 28, 2023
USD ($)
Jan. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Interest Rate Contracts            
Derivative [Line Items]            
Notional amount   $ 600.0 $ 600.0      
Interest Rate Swaps            
Derivative [Line Items]            
Notional amount         $ 500.0 $ 500.0
Net deferred gain on interest rate swap net of taxes expected to be recognized over the next 12 months   $ 2.1        
Interest Rate Collar Agreement            
Derivative [Line Items]            
Notional amount         $ 500.0  
Terminated notional amount       $ 400.0    
Fuel Contracts            
Derivative [Line Items]            
Notional volume | gal   2.5        
Additional combined notional volume | gal 5.5          
Maximum            
Derivative [Line Items]            
Percentage of participants compensation deferred   70.00%