Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Schedule of borrowings (Details)

v3.23.1
Financing Agreements - Schedule of borrowings (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Sep. 30, 2022
Debt Instrument [Line Items]    
Total debt $ 1,313.9 $ 1,222.1
Current portion of long-term debt 10.0 0.0
Long-term debt 1,303.9 1,222.1
$1,000.0 revolving credit facility (excluding outstanding letters of credit)    
Debt Instrument [Line Items]    
Total debt 0.0 6.7
$200.0 term loan    
Debt Instrument [Line Items]    
Total debt 197.5 0.0
$400.0 senior unsecured notes (1)    
Debt Instrument [Line Items]    
Total debt 397.5 397.1
Debt Issuance Costs, Line of Credit Arrangements, Gross 2.5 2.9
$375.0 senior unsecured notes, net of discount (2)    
Debt Instrument [Line Items]    
Total debt 372.5 372.2
Debt Issuance Costs, Line of Credit Arrangements, Gross 2.2 2.5
$350.0 senior unsecured notes (3)    
Debt Instrument [Line Items]    
Total debt 346.4 346.2
Debt Issuance Costs, Line of Credit Arrangements, Gross 3.6 3.8
$100.0 Series A Notes (4)    
Debt Instrument [Line Items]    
Total debt $ 0.0 99.9
Debt Issuance Costs, Line of Credit Arrangements, Gross   $ 0.1