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Debt - Long-term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Debt
Total debt	$ 2,217,300	$ 2,224,600
Less: Current portion of debt and short-term borrowings	(89,500)	(48,600)
Less: Unamortized debt issuance costs	(14,400)	(19,300)
Long-term debt	2,113,369	2,156,686
Credit Agreement
Debt
Total debt	1,119,800	1,143,300
2027 Senior Notes
Debt
Total debt	997,300	997,300
Other Debt
Debt
Total debt	$ 100,200	$ 84,000

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