Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Debt Instrument [Line Items]
Total debt	$ 2,547,100	$ 2,539,800
Less: Current portion of debt and short-term borrowings	(69,400)	(66,900)
Less: Unamortized debt issuance costs	(21,700)	(22,600)
LONG-TERM DEBT	2,456,012	2,450,330
Credit Agreement
Debt Instrument [Line Items]
Total debt	1,444,900	1,446,600
2027 Senior Notes
Debt Instrument [Line Items]
Total debt	997,300	997,300
Other debt
Debt Instrument [Line Items]
Total debt	$ 104,900	$ 95,900