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Reportable Segments Information (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net revenues	$ 1,710.3	$ 1,619.0	$ 1,443.5
Less:
Advertising	74.3	69.4	60.5
Income from continuing operations	214.8	214.5	199.4
Reportable Segment
Segment Reporting Information [Line Items]
Net revenues	1,710.3	1,619.0	1,443.5
Less:
Labor cost	415.4	408.0	372.9
Materials	297.4	279.7	254.6
Other service delivery costs	339.0	312.5	271.5
Advertising	74.3	69.3	60.5
Payroll	123.6	107.9	102.0
Other general and administrative	152.0	127.9	102.0
Other segment items	93.8	99.2	80.6
Income from continuing operations	$ 214.8	$ 214.5	$ 199.4

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