Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income		$ 56.0	$ 66.4	$ (7.7)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		142.2	108.4	105.2
Amortization of intangible assets		29.3	35.8	44.5
Amortization of financing costs and original issue discount		2.9	2.8	3.5
Loss on debt extinguishment	[1]	0.7	0.6	8.3
Deferred taxes		21.0	1.7	(21.5)
Equity-based compensation		18.2	20.2	22.1
Realized gain on hedges		(5.4)	(11.1)	(15.2)
Gain on divestiture		0.0	(43.6)	0.0
Gain on disposal of property and equipment		(23.7)	(14.9)	(12.6)
Other non-cash activities		9.6	6.3	7.3
Change in operating assets and liabilities:
Accounts receivable		12.2	19.9	(52.6)
Unbilled and deferred revenue		28.4	22.1	(5.4)
Other operating assets		(7.6)	11.4	17.1
Accounts payable and other operating liabilities		8.0	(20.4)	36.9
Net cash provided by operating activities		291.8	205.6	129.9
Cash flows from investing activities:
Purchase of property and equipment		(254.2)	(78.4)	(71.3)
Proceeds from sale of property and equipment		27.6	18.1	21.6
Business acquisitions, net of cash acquired		0.0	0.0	(13.8)
Proceeds from divestiture		0.0	51.0	0.0
Other investing activities		2.7	3.7	2.1
Net cash (used) by investing activities		(223.9)	(5.6)	(61.4)
Cash flows from financing activities:
Repayments of finance lease obligations		(48.4)	(36.3)	(27.6)
Repayments of term loan		0.0	0.0	(459.0)
Repayments of receivables financing agreement		(29.1)	(87.3)	(554.5)
Repayments of revolving credit facility		0.0	0.0	(33.5)
Proceeds from receivables financing agreement, net of issuance costs		14.5	0.5	549.5
Proceeds from revolving credit facility		0.0	0.0	33.5
Debt issuance and prepayment costs		(1.3)	(2.5)	(1.8)
Series A preferred stock dividend		(35.8)	(17.8)	0.0
Proceeds from issuance of Series A preferred stock, net of issuance costs		0.0	0.0	495.0
Proceeds from issuance of common stock, net of share issuance costs		3.1	3.0	1.2
Repurchase of common stock and distributions		(24.2)	(3.1)	(2.2)
Contingent business acquisition payments		(0.5)	(5.1)	(22.1)
(Decrease) increase in book overdrafts		(12.1)	20.1	0.0
Other financing activities		0.0	1.9	(0.1)
Net cash (used) by financing activities		(133.8)	(126.6)	(21.6)
Net change in cash and cash equivalents		(65.9)	73.4	46.9
Cash and cash equivalents, beginning of period		140.4	67.0	20.1
Cash and cash equivalents, end of period		74.5	140.4	67.0
Supplemental Cash Flow Information:
Cash paid (received) for income taxes, net		6.3	34.4	(9.8)
Cash paid for interest		56.7	67.7	82.1
Accrual for property and equipment		27.8	50.7	0.0
Series A Convertible Preferred Stock
Supplemental Cash Flow Information:
Non-cash Series A Preferred Stock dividends		$ 0.0	$ 8.9	$ 3.2

[1] Represents losses on the extinguishment of debt related to Amendments No. 9, No. 8, and No. 7 to the Credit Agreement, in the fiscal years ended September 30, 2025, 2024, and 2023, respectively, and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties.