Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)		$ 14.0	$ 46.3	$ (41.6)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		98.9	84.7	80.5
Amortization of intangible assets		51.5	52.3	55.8
Amortization of financing costs and original issue discount		3.7	3.7	3.7
Loss on debt extinguishment	[1]	12.6	0.0	0.0
Deferred taxes		(6.6)	28.9	(27.1)
Equity-based compensation		18.9	19.7	23.6
Realized (gain) loss on hedges		(1.0)	4.6	19.3
Goodwill impairment		0.0	0.0	15.5
Other non-cash activities, net		(1.7)	(4.1)	6.1
Change in operating assets and liabilities:
Accounts receivable		(6.3)	(41.9)	18.6
Unbilled and deferred revenue		(6.9)	(25.8)	21.2
Other operating assets		(10.5)	(28.4)	(4.5)
Accounts payable and other operating liabilities		(59.7)	8.4	74.0
Net cash provided by operating activities		106.9	148.4	245.1
Cash flows from investing activities:
Purchase of property and equipment		(107.3)	(61.2)	(52.7)
Proceeds from sale of property and equipment		7.1	9.5	4.8
Business acquisitions, net of cash acquired		(93.1)	(110.4)	(90.3)
Proceeds from divestitures		0.0	2.7	28.5
Other investing activities, net		(0.4)	0.7	0.9
Net cash (used) by investing activities		(193.7)	(158.7)	(108.8)
Cash flows from financing activities:
Repayments of finance lease obligations		(27.0)	(20.5)	(9.9)
Repayments of term loan		(1,006.3)	(10.4)	(10.4)
Repayments of receivables financing agreement		(374.4)	(24.6)	(80.0)
Repayments of revolving credit facility		(165.0)	0.0	(70.0)
Proceeds from term loan, net of issuance costs		1,180.1	0.0	0.0
Proceeds from receivables financing agreement, net of issuance costs		391.7	34.5	80.0
Proceeds from revolving credit facility		165.0	0.0	70.0
Debt issuance costs		(4.6)	0.0	0.0
Proceeds from issuance of common stock, net of share issuance costs		1.6	1.8	1.8
Repurchase of common stock and distributions		(163.8)	(1.9)	(1.5)
Other financing activities, net		(14.1)	(2.0)	1.7
Net cash (used) by financing activities		(16.8)	(23.1)	(18.3)
Net change in cash and cash equivalents		(103.6)	(33.4)	118.0
Cash and cash equivalents, beginning of period		123.7	157.1	39.1
Cash and cash equivalents, end of period		20.1	123.7	157.1
Supplemental Cash Flow Information:
Cash paid for income taxes, net		17.3	19.5	8.6
Cash paid for interest		$ 48.7	$ 40.1	$ 61.4

[1] Represents losses on the extinguishment of debt related to Amendment No. 6 to the Credit Agreement and includes the write-off of deferred finance fees and original issue discount.