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Debt (Tables)
3 Months Ended
Dec. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Long-term Debt
The detail of long-term debt was as follows:
December 31,
2024
September 30,
2024
Senior notes, fixed interest rate of 5.5%, due 2028$750.0 $750.0 
Senior notes, fixed interest rate of 4.1%, due 2029500.0 500.0 
U.S. Revolving Credit Facility199.0 34.0 
Total1,449.0 1,284.0 
Less unamortized debt issuance costs and discount (1)
8.4 9.0 
Total long-term debt$1,440.6 $1,275.0 
(1)As of December 31, 2024, debt issuance costs were $5.0 and $3.4 related to the Senior Notes due 2028 and the Senior Notes due 2029, respectively. As of September 30, 2024, debt issuance costs were $5.4 and $3.6 related to the Senior Notes due 2028 and the Senior Notes due 2029, respectively.