Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	1 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 07, 2021	Sep. 30, 2022
Cash flows from operating activities
Net loss	$ (5.0)	$ (81.3)	$ (94.6)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	30.2	194.9	381.1
Loss on impairment of long-lived assets	0.0	0.0	2.7
Loss on extinguishment of debt	0.0	10.7	0.0
Provision for loss on receivables	0.9	2.1	5.8
Unrealized gain on interest rate swaps	0.0	0.0	(14.8)
Noncash portion of interest expense (income)	(0.3)	4.0	4.0
Deferred income taxes	(1.1)	(21.1)	(33.5)
Pension and other postretirement payments in excess of expense	(1.9)	(0.2)	(12.3)
Stock-based compensation	0.0	4.3	0.0
Other, net	(0.3)	(5.2)	(1.4)
Changes in operating assets and liabilities:
Decrease (increase) in receivables	(20.3)	51.1	48.6
Increase in inventory, materials, supplies, prepaid expenses and other current assets	(3.2)	(29.4)	(24.0)
Increase (decrease) in accounts payable	(51.7)	49.1	10.0
(Decrease) increase in accrued and other current liabilities	(37.5)	2.8	(23.9)
(Increase) decrease in other noncurrent assets	(2.1)	2.1	(9.1)
(Decrease) increase in other noncurrent liabilities	29.9	8.8	(3.6)
Net cash provided by (used in) operating activities	(62.4)	192.7	235.0
Cash flows from investing activities
Capital expenditures	(35.4)	(165.2)	(341.6)
Acquisition of business, net of cash acquired	(1,620.7)	0.0	(65.5)
Acquisition of Paniolo fiber assets	(1.3)	(50.5)	0.0
Proceeds from sale of assets	0.0	9.1	2.3
Other, net	0.0	(0.1)	0.1
Net cash used in investing activities	(1,657.4)	(206.7)	(404.7)
Cash flows from financing activities
Capital contributions by Red Fiber Parent LLC	1,716.1	0.0	0.0
Proceeds from issuance of long-term debt	150.0	23.0	0.0
Net increase (decrease) in corporate credit and receivables facilities with initial maturities less than 90 days	(108.7)	9.0	190.1
Repayment of debt	(1.4)	(13.4)	(15.5)
Debt issuance costs	(42.0)	(0.8)	(0.7)
Dividends paid on preferred stock	0.0	(7.8)	0.0
Other, net	0.0	(2.0)	0.0
Net cash provided by financing activities	1,714.0	8.0	173.9
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.0	0.0	(0.1)
Net increase (decrease) in cash, cash equivalents and restricted cash	(5.8)	(6.0)	4.1
Cash, cash equivalents and restricted cash at beginning of period	11.2	17.2	6.1
Cash, cash equivalents and restricted cash at end of period	5.4	11.2	10.2
Noncash investing and financing transactions:
Acquisition of property by assuming debt and other noncurrent liabilities	3.8	3.8	8.1
Acquisition of property on account	$ 46.3	$ 54.9	$ 78.2