CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net (loss) income	$ (244.2)	$ 10.2
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	141.3	133.9
Deferred income taxes	(86.7)	(9.0)
Provision for doubtful accounts	8.5	2.7
Loss (gain) on sale of operating assets, net	0.3	(1.0)
Amortization of debt issuance costs and discount	1.3	1.3
Impairment losses on intangibles	259.8
Non-cash compensation	13.9	18.5
Other non-cash items	0.1	0.1
Changes in operating assets and liabilities:
Receivables and other operating assets	(16.7)	(5.9)
Payables and accruals	12.8	(163.6)
Net cash provided by (used in) operating activities	90.4	(12.8)
Cash flows from investing activities:
Capital expenditures	(188.3)	(114.5)
Other investing activities	0.2	1.3
Net cash used in investing activities	(188.1)	(113.2)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net	160.0
Payments on long-term debt and finance lease obligations	(24.5)	(14.9)
Purchase of shares	(46.2)	(7.0)
Net cash provided by (used in) financing activities	89.3	(21.9)
Decrease in cash and cash equivalents	(8.4)	(147.9)
Cash and cash equivalents, beginning of period	31.0	193.2
Cash and cash equivalents, end of period	22.6	45.3
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	48.5	24.3
Cash paid during the periods for income taxes	10.9	142.7
Cash received during the periods for refunds of income taxes	4.9
Non-cash operating activities:
Operating lease additions	8.0	2.7
Non-cash financing activities:
Finance lease additions	9.6	8.3
Capital expenditures within accounts payable and accruals	$ 36.2	$ 25.9