Annual report pursuant to Section 13 and 15(d)

Financing Agreements Financing Agreements - Schedule of borrowings (Details)

v3.22.2.2
Financing Agreements Financing Agreements - Schedule of borrowings (Details) - USD ($)
Sep. 30, 2022
Jun. 08, 2022
Sep. 30, 2021
Mar. 03, 2021
Jun. 16, 2020
Sep. 25, 2019
Dec. 15, 2014
Debt Instrument [Line Items]              
Total debt $ 1,222,100,000   $ 1,212,900,000        
Less: current portion 0   0        
Long-term debt 1,222,100,000   1,212,900,000        
$400.0 senior unsecured notes              
Debt Instrument [Line Items]              
Debt issued 400.0       $ 400,000,000.0    
350 Million Senior Unsecured Notes              
Debt Instrument [Line Items]              
Debt issued       $ 350,000,000.0      
Total debt 346,200,000   345,800,000        
Former Credit Agreement | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity   $ 1,000,000,000          
Term loans | 350 Million Senior Unsecured Notes              
Debt Instrument [Line Items]              
Unamortized debt issuance costs 3,800,000   4,200,000        
Senior unsecured notes              
Debt Instrument [Line Items]              
Debt issued           $ 375,000,000.0  
Senior unsecured notes | $400.0 senior unsecured notes              
Debt Instrument [Line Items]              
Total debt 397,100,000   395,800,000        
Unamortized debt issuance costs 2,900,000   4,200,000        
Senior unsecured notes | $375.0 senior unsecured notes              
Debt Instrument [Line Items]              
Debt issued           375,000,000.0  
Total debt 372,200,000   371,500,000     $ 374,400,000  
Unamortized debt issuance costs 2,500,000   3,100,000        
$1,000.0 revolving credit facility (excluding outstanding letters of credit)              
Debt Instrument [Line Items]              
Total debt 6,700,000   0        
$1,000.0 revolving credit facility (excluding outstanding letters of credit) | Former Credit Agreement              
Debt Instrument [Line Items]              
Unamortized debt issuance costs 1,900,000            
$100.0 Series A Notes              
Debt Instrument [Line Items]              
Debt issued             $ 100,000,000.0
Total debt 99,900,000   99,800,000        
Unamortized debt issuance costs $ 100,000   $ 200,000