Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net (loss)		$ (24.1)	$ (1.3)
Adjustments to reconcile net (loss) to net cash provided by operating activities:
Depreciation		80.9	71.5
Amortization of intangible assets		33.7	38.7
Amortization of financing costs and original issue discount		2.7	2.8
Loss on debt extinguishment	[1]	0.0	12.6
Deferred taxes		(23.0)	(12.7)
Equity-based compensation		15.7	14.0
Realized (gain) loss on hedges		(6.9)	0.2
Other non-cash activities, net		0.1	(2.5)
Change in operating assets and liabilities:
Accounts receivable		(53.3)	(28.8)
Unbilled and deferred revenue		11.0	16.0
Other operating assets		17.3	(7.6)
Accounts payable and other operating liabilities		35.2	(37.2)
Net cash provided by operating activities		89.3	65.7
Cash flows from investing activities:
Purchase of property and equipment		(57.9)	(88.1)
Proceeds from sale of property and equipment		6.8	5.4
Business acquisitions, net of cash acquired		(13.8)	(89.4)
Other investing activities, net		1.9	0.0
Net cash (used) by investing activities		(63.0)	(172.1)
Cash flows from financing activities:
Repayments of finance lease obligations		(20.9)	(18.1)
Repayments of term loan		(9.0)	(1,003.3)
Repayments of receivables financing agreement		(448.0)	(203.0)
Repayments of revolving credit facility		(33.5)	(165.0)
Proceeds from term loan, net of issuance costs		0.0	1,180.1
Proceeds from receivables financing agreement, net of issuance costs		460.0	223.7
Proceeds from revolving credit facility		33.5	165.0
Debt issuance costs		0.0	(4.6)
Proceeds from issuance of common stock, net of share issuance costs		1.0	1.3
Repurchase of common stock and distributions		(1.3)	(163.7)
Contingent business acquisition payments		(18.5)	0.0
Other financing activities, net		(0.1)	(3.4)
Net cash (used) provided by financing activities		(36.8)	9.0
Net change in cash and cash equivalents		(10.5)	(97.4)
Cash and cash equivalents, beginning of period		20.1	123.7
Cash and cash equivalents, end of period		9.6	26.3
Supplemental Cash Flow Information
Cash (received) paid for income taxes, net		(18.4)	16.5
Cash paid for interest		$ 62.9	$ 31.1

[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.