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Property and Equipment, net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 58.0	$ 45.6	$ 36.3
Capitalized computer software, additions	38.3	36.1
Sale of property and equipment assets	6.7	4.8
Property and equipment, net	166.6	$ 143.1
Accelerated the amortization of certain software cost	4.0
Net book value of accelerated	1.2
Property and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 2.3
Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	10 years

X

- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

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Additions made to capitalized computer software costs during the period.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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