Debt (Tables)

12 Months Ended

Sep. 30, 2025

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The detail of long-term debt was as follows:

	September 30, 2025		September 30, 2024
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	140.0		34.0
Total long-term debt, including current maturities	1,390.0		1,284.0
Less unamortized debt issuance costs and discount (1)	6.7		9.0
Total long-term debt	$	1,383.3	$	1,275.0

(1)At September 30, 2025, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $3.9 and $2.8, respectively. At September 30, 2024, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $5.4 and $3.6, respectively.