Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (40.9)	$ (69.9)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	83.1	133.3
Provision for loss on receivables	2.4	2.8
Unrealized (gain) loss on interest rate swaps	(15.0)	10.4
Noncash portion of interest expense	2.1	1.6
Deferred income taxes	32.8	(13.8)
Pension and other postretirement payments in excess of expense	(2.4)	(1.6)
Other, net	(4.8)	(0.9)
Changes in operating assets and liabilities:
Decrease in receivables	115.4	60.7
Decrease in inventory, materials, supplies, prepaid expenses and other current assets	3.5	3.0
Decrease in accounts payable	(32.7)	(74.1)
Decrease in accrued and other current liabilities	(14.3)	(24.7)
Increase in other noncurrent assets	(5.2)	(2.4)
Increase in other noncurrent liabilities	3.6	2.2
Net cash provided by operating activities	127.6	26.6
Cash flows from investing activities
Capital expenditures	(159.5)	(143.7)
Insurance proceeds received for damage to equipment	3.2	0.1
Other, net	(0.2)	(2.8)
Net cash used in investing activities	(156.5)	(146.4)
Cash flows from financing activities
Proceeds from issuance of long-term debt	7.5	6.3
Net increase in corporate credit facility with initial maturities less than 90 days	29.3	77.0
Proceeds from borrowings on receivables facilities	389.7	608.3
Payments on receivables facilities	(379.6)	(560.9)
Repayment of debt	(8.5)	(6.5)
Payment of debt issuance costs	(0.1)	(1.5)
Net cash provided by financing activities	38.3	122.7
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0.0	0.0
Net increase in cash, cash equivalents and restricted cash	9.4	2.9
Cash, cash equivalents and restricted cash at beginning of period	12.5	12.9
Cash, cash equivalents and restricted cash at end of period	21.9	15.8
Noncash investing and financing transactions:
Acquisition of property by assuming debt and other noncurrent liabilities	2.5	0.9
Acquisition of property on account	$ 71.4	$ 90.7