Debt (Tables)

6 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The detail of long-term debt was as follows:

	March 31, 2023		September 30, 2022
Senior notes, fixed interest rate of 5.500%, due 2028	$	750.0	$	750.0
Senior notes, fixed interest rate of 4.125%, due 2029	500.0		500.0
U.S. revolving credit facility (1)	176.0		155.0
Total long-term debt	1,426.0		1,405.0
Less unamortized debt issuance costs and discount (2)	12.4		13.6
Total long-term debt	$	1,413.6	$	1,391.4

(1)The U.S. revolving credit facility matures in April 2025.

(2)As of March 31, 2023, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $7.6 and $4.8, respectively. As of September 30, 2022, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $8.3 and $5.3, respectively.

Additionally, t