Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income (loss)		$ 40.8	$ (24.1)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation		79.8	80.9
Amortization of intangible assets		27.4	33.7
Amortization of financing costs and original issue discount		2.0	2.7
Loss on debt extinguishment	[1]	0.6	0.0
Deferred taxes		(10.1)	(23.0)
Equity-based compensation		15.1	15.7
Realized gain on hedges		(8.5)	(6.9)
Gain on divestiture		(44.0)	0.0
Other non-cash activities		(6.0)	0.1
Change in operating assets and liabilities:
Accounts receivable		(9.9)	(53.3)
Unbilled and deferred revenue		47.1	11.0
Other operating assets		21.4	17.3
Accounts payable and other operating liabilities		(3.6)	35.2
Net cash provided by operating activities		152.1	89.3
Cash flows from investing activities:
Purchase of property and equipment		(46.0)	(57.9)
Proceeds from sale of property and equipment		14.1	6.8
Business acquisitions, net of cash acquired		0.0	(13.8)
Proceeds from divestiture		51.6	0.0
Other investing activities		3.2	1.9
Net cash provided (used) by investing activities		22.9	(63.0)
Cash flows from financing activities:
Repayments of finance lease obligations		(26.4)	(20.9)
Repayments of term loan		0.0	(9.0)
Repayments of receivables financing agreement		(82.2)	(448.0)
Repayments of revolving credit facility		0.0	(33.5)
Proceeds from receivables financing agreement, net of issuance costs		0.5	460.0
Proceeds from revolving credit facility		0.0	33.5
Debt issuance and prepayment costs		(2.4)	0.0
Series A preferred stock dividend		(8.9)	0.0
Proceeds from issuance of common stock, net of share issuance costs		1.3	1.0
Repurchase of common stock and distributions		(3.1)	(1.3)
Contingent business acquisition payments		(4.7)	(18.5)
Other financing activities		(0.2)	(0.1)
Net cash (used) by financing activities		(126.1)	(36.8)
Net change in cash and cash equivalents		48.9	(10.5)
Cash and cash equivalents, beginning of period		67.0	20.1
Cash and cash equivalents, end of period		115.9	9.6
Supplemental Cash Flow Information
Cash paid (received) for income taxes, net		14.8	(18.4)
Cash paid for interest		61.9	62.9
Accrual for property and equipment		21.3	0.0
Series A Preferred Stock [Member]
Supplemental Cash Flow Information
Non-cash Series A Preferred Stock dividends		$ 8.9	$ 0.0

[1] Represents losses on the extinguishment of debt related to Amendment No. 8 to the Credit Agreement and includes the write-off of deferred finance fees and original issue discount.