Debt (Tables)

12 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The detail of long-term debt was as follows:

	September 30, 2023		September 30, 2022
Senior notes, fixed interest rate of 5.5%, due 2028 (1)	750.0		750.0
Senior notes, fixed interest rate of 4.1%, due 2029 (1)	500.0		500.0
Revolving credit facility (2)	122.0		155.0
Total long-term debt, including current maturities	1,372.0		1,405.0
Less unamortized debt issuance costs and discount (1)	11.3		13.6
Total long-term debt	$	1,360.7	$	1,391.4

(1)At September 30, 2023, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $6.9 and $4.4, respectively. At 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.

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