Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net service revenues	$ 608.1	$ 657.2	$ 1,737.9	$ 1,779.9
Cost of services provided	451.7	468.6	1,306.2	1,313.3
Gross profit	156.4	188.6	431.7	466.6
Selling, general and administrative expense	131.8	114.0	389.0	343.5
Amortization expense	13.6	13.9	40.6	42.9
Income from operations	11.0	60.7	2.1	80.2
Other income	1.7	0.4	0.4	0.1
Interest expense	15.4	18.4	49.9	54.4
(Loss) income before income taxes	(2.7)	42.7	(47.4)	25.9
Income tax benefit (expense)	0.3	(11.0)	11.9	(6.6)
Net (loss) income	$ (2.4)	$ 31.7	$ (35.5)	$ 19.3
(Loss) earnings per share:
Basic and diluted	$ (0.02)	$ 0.31	$ (0.34)	$ 0.19