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Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2025	Sep. 30, 2025
Leases [Abstract]
Operating lease right-of-use assets, net	$ 107.8	$ 104.1
Other current liabilities	20.0	19.6
Operating lease liabilities	80.4	77.1
Total operating lease liabilities	$ 100.4	$ 96.7
Weighted-average remaining lease term (in years)	5 years 7 months 6 days	5 years 7 months 6 days
Weighted-average discount rate	4.50%	4.30%

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Present value of lessee's discounted obligation for lease payments from operating lease.

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-Topic 842
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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