Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Defined Benefit Pension Plan - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 GBP (£)	Jun. 30, 2025 GBP (£)
Defined benefit pension plan
Net periodic pension cost (benefit) \| $	$ 0.1	$ 0.1	$ 0.2	$ 0.1
Maximum
Defined benefit pension plan
Expected contributions \| £					£ 10,000,000	£ 10,000,000