Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Hedge gain (loss) arising during the period, tax	$ 5.3	$ 2.5	$ (5.8)
Foreign currency translation adjustment, tax	0.0	0.0	0.0
Change in pension benefit, net of tax	$ 1.7	$ 1.3	$ (7.1)

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Period Type:	duration