Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Debt Instrument [Line Items]
Total debt	$ 2,743,700	$ 2,539,800
Less: Current portion of debt and short-term borrowings	(66,300)	(66,900)
Less: Unamortized debt issuance costs	(30,200)	(22,600)
Long-term debt	2,647,220	2,450,330
Credit Agreement
Debt Instrument [Line Items]
Total debt	1,439,900	1,446,600
2027 Senior Notes
Debt Instrument [Line Items]
Total debt	0	997,300
2033 Senior Notes
Debt Instrument [Line Items]
Total debt	1,200,000	0
Other debt
Debt Instrument [Line Items]
Total debt	$ 103,800	$ 95,900