Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net service revenues	$ 711.9	$ 651.9	$ 1,303.8	$ 1,206.3
Cost of services provided	554.8	493.8	1,006.8	914.6
Gross profit	157.1	158.1	297.0	291.7
Selling, general and administrative expense	133.4	127.9	268.2	251.3
Amortization expense	12.0	12.5	25.5	26.4
Income from operations	11.7	17.7	3.3	14.0
Other (expense) income	(1.0)	0.5	(0.4)	2.0
Interest expense	10.1	9.6	19.7	23.1
Income (loss) before income taxes	0.6	8.6	(16.8)	(7.1)
Income tax (benefit) expense	(0.1)	2.3	(4.7)	(1.4)
Net income (loss)	$ 0.7	$ 6.3	$ (12.1)	$ (5.7)
Income (loss) per share:
Basic and Diluted	$ 0.01	$ 0.06	$ 0.12	$ (0.05)