v3.22.2.2
DEBT - Credit Facilities (Details)
$ in Millions
Jun. 08, 2022
USD ($)
Apr. 08, 2022
USD ($)
Jul. 05, 2018
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
Sep. 30, 2020
Debt Instrument [Line Items]            
Debt, weighted average interest rate (percentage)       3.60% 3.70% 4.30%
Debt Instrument, Redemption, Period Two            
Debt Instrument [Line Items]            
Maximum leverage ratio       6.50    
Debt Instrument, Redemption, Period Three            
Debt Instrument [Line Items]            
Maximum leverage ratio       6.25    
Debt Instrument, Redemption, Period Four            
Debt Instrument [Line Items]            
Maximum leverage ratio       5.50    
Debt Instrument, Redemption, Period Five            
Debt Instrument [Line Items]            
Maximum leverage ratio       4.50    
Fifth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity     $ 2,300.0      
Leverage ratio       6.01    
Interest coverage ratio       4.83    
Fifth Amended And Restated Senior Secured Credit Agreement | Minimum            
Debt Instrument [Line Items]            
Interest coverage ratio       3.00    
Sixth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity   $ 2,500.0        
Outstanding debt       $ 2,875.5    
Sixth Amended And Restated Senior Secured Credit Agreement | Debt Instrument, Redemption, Period One            
Debt Instrument [Line Items]            
Maximum leverage ratio       6.25    
Credit Facilities            
Debt Instrument [Line Items]            
Senior secured credit facilities, available borrowing capacity       $ 1,185.5    
Credit Facilities | Fifth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Debt, maturity period (in years)     5 years      
Credit Facilities | Sixth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Debt, maturity period (in years)   5 years        
Revolving loans            
Debt Instrument [Line Items]            
Debt, weighted average interest rate (percentage)       2.80% 1.90% 3.30%
Revolving loans | Sixth Amended And Restated Senior Secured Credit Agreement, Amendment One            
Debt Instrument [Line Items]            
Interest rate, increase (decrease) 35          
Annual facility fee rate increase (decrease) 15          
Maximum leverage ratio 4.75          
Cash dividends, annual maximum $ 225.0          
Maximum other dividends and distributions $ 25.0          
Letter of Credit | Credit Facilities            
Debt Instrument [Line Items]            
Aggregate face amount of letters of credit outstanding       $ 14.1    
Revolving loans | Fifth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity     $ 1,500.0      
Revolving loans | Sixth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity   $ 1,500.0        
Letters of credit   100.0        
Additional committed credit   500.0        
Secured Term Loan | Fifth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity     800.0      
Letters of credit     $ 75.0      
Secured Term Loan | Sixth Amended And Restated Senior Secured Credit Agreement            
Debt Instrument [Line Items]            
Senior secured credit facilities, maximum borrowing capacity   $ 1,000.0        
Secured Term Loan | Sixth Amended And Restated Senior Secured Credit Agreement, Amendment One            
Debt Instrument [Line Items]            
Interest rate, increase (decrease) 50