Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net service revenues	$ 655.9	$ 591.8
Cost of services provided	508.3	451.9
Gross profit	147.6	139.9
Selling, general and administrative expense	137.6	134.9
Amortization expense	11.9	13.4
(Loss) from operations	(1.9)	(8.4)
Other (income)	(0.7)	(0.7)
Interest expense	23.2	9.7
(Loss) before income taxes	(24.4)	(17.4)
Income tax (benefit)	(5.5)	(4.6)
Net (loss)	$ (18.9)	$ (12.8)
(Loss) per share:
Basic income (loss) per share	$ (0.20)	$ (0.12)
Diluted income (loss) per share	$ (0.20)	$ (0.12)