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Acquisitions and Dispositions - Acquisitions (Details) $ in Millions	12 Months Ended
	Sep. 30, 2025 USD ($) service_center_store numberOfFormerFranchiseCenters	Sep. 30, 2024 USD ($) service_center_store numberOfFormerFranchiseCenters	Sep. 30, 2023 USD ($) service_center_store
Business Combination [Line Items]
Number of service center stores acquired	33	36	31
Number of former franchise service center stores acquired | numberOfFormerFranchiseCenters	6	5,000,000
Number of service center stores acquired in single and multi-store transactions	24
Purchase price | $	$ 65.5	$ 53.3	$ 36.3
Number of service center stores	1,016	950	876
Express Care
Business Combination [Line Items]
Number of service center stores acquired	3	2,000,000

X

- Definition

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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