Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net loss	$ (75.2)	$ (80.0)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	163.4	244.9
Provision for loss on receivables	4.8	5.0
Unrealized gain on interest rate swaps	(15.4)	(12.8)
Noncash portion of interest expense	5.3	3.3
Deferred income taxes	30.1	(25.7)
Pension and other postretirement payments in excess of expense	(5.5)	(3.6)
Other, net	(5.3)	(0.5)
Changes in operating assets and liabilities:
Decrease (increase) in receivables	115.4	(1.5)
Decrease (increase) in inventory, materials, supplies, prepaid expenses and other current assets	12.2	(1.4)
Decrease in accounts payable	(92.3)	(84.8)
Decrease in accrued and other current liabilities	(4.3)	(20.7)
Increase in other noncurrent assets	(6.7)	(1.8)
Increase (decrease) in other noncurrent liabilities	2.2	(3.8)
Net cash provided by operating activities	128.7	16.6
Cash flows from investing activities
Capital expenditures	(296.6)	(303.3)
Acquisition of businesses, net of cash acquired	0.0	(3.0)
Insurance proceeds received for damage to equipment	3.3	0.2
Other, net	(1.1)	(3.1)
Net cash used in investing activities	(294.4)	(309.2)
Cash flows from financing activities
Proceeds from issuance of long-term debt	306.0	205.2
Net (decrease) increase in corporate credit facility with initial maturities less than 90 days	(105.5)	68.0
Proceeds from borrowings on receivables facilities	761.3	1,110.6
Payments on receivables facilities	(772.0)	(1,055.1)
Repayment of debt	(15.5)	(33.9)
Payment of debt issuance costs	(3.7)	(3.3)
Net cash provided by financing activities	170.6	291.5
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.0	0.0
Net increase (decrease) in cash, cash equivalents and restricted cash	4.9	(1.1)
Cash, cash equivalents and restricted cash at beginning of period	12.5	12.9
Cash, cash equivalents and restricted cash at end of period	17.4	11.8
Noncash investing and financing transactions:
Acquisition of property by assuming debt and other noncurrent liabilities	3.6	3.4
Acquisition of property on account	$ 61.8	$ 95.6