Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Debt
Total debt	$ 2,230,900	$ 2,235,600
Less: Current portion of debt and short-term borrowings	(42,800)	(53,800)
Less: Unamortized debt issuance costs	(21,800)	(24,100)
Long-term debt	2,166,310	2,157,740
Credit Agreement
Debt
Total debt	1,152,200	1,155,300
2027 Senior Notes
Debt
Total debt	997,300	997,300
Other Debt
Debt
Total debt	$ 81,400	$ 83,000