Debt (Tables)

9 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of Long-term Debt

The detail of long-term debt was as follows:

	June 30, 2021		September 30, 2020
Senior notes, fixed interest rate of 4.7%, due 2022	$	—	$	500.0
Senior notes, fixed interest rate of 5.5%, due 2028	750.0		750.0
Senior notes, fixed interest rate of 4.1%, due 2029	500.0		—
U.S. revolving credit facility due 2025	—		—
Total long-term debt, including current maturities	1,250.0		1,250.0
Less unamortized debt issuance costs and discount (1) (2)	16.4		12.1
Total long-term debt	$	1,233.6	$	1,237.9

(1)At June 30, 2021, the balance for the Senior Notes due 2028 and the Senior Notes due 2029 are reflected net of debt issuance costs of $10.2 and $6.2, respectively. At September 30, 2020, the balance for the Senior Notes due 2022 and the Senior Notes due 2028 are reflected net of debt issuance costs of $0.6 and $11.3, respectively.

(2)At September 30, 2020, the balance for the Senior Notes due 2022 was reflected net of discount of $0.2.