Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities:
Net income	$ 146.4	$ 391.5	$ 295.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	62.5	59.0	55.9
Stock-based compensation	13.8	9.1	5.5
Deferred income taxes	16.8	7.4	0.6
Provision for allowances, claims, and doubtful accounts	(0.1)	0.2	3.2
Loss on retirement of debt		21.3	5.5
Gain on sale of assets		(3.8)	(109.6)
Gain on bargain purchase		(0.6)
Non-cash (gain) loss from derivatives	(11.3)	(17.9)	27.6
Pension settlement charge			98.7
Pension and other postretirement benefits curtailment gain	(0.8)
Other items	(0.4)	(0.6)	0.1
Change in operating assets and liabilities, net of effects of acquisitions:
Receivables	67.9	126.7	(252.5)
Inventories	28.8	39.9	(227.9)
Other assets and liabilities	6.4	19.2	(23.3)
Accounts payable	24.8	(72.1)	123.6
Accrued liabilities	(17.3)	(17.5)	32.0
Accrued taxes payable/receivable	23.3	(52.9)	25.2
Deferred employee benefit costs	(11.6)	(7.7)	(25.0)
Tenant improvement allowance	15.9
Net adjustments	218.7	109.7	(260.4)
Net cash provided by operating activities	365.1	501.2	35.0
Investing activities:
Acquisitions, net of cash acquired	(137.8)	(57.0)	(14.5)
Capital expenditures	(121.9)	(105.1)	(59.3)
Proceeds from sale of property, plant, and equipment	0.5	8.0	166.3
Proceeds from insurance settlement	0.3
Investment in subsidiary		(2.0)
Other investing activities	(3.2)	(3.9)	1.9
Net cash provided by (used in) investing activities	(262.1)	(160.0)	94.4
Financing activities:
Repayment of debt	(1.7)	(321.3)	(157.3)
Net proceeds of short-term borrowings	69.8	26.1	45.8
Credit facility issuance costs		(2.7)
Net increase (decrease) in book overdrafts	(7.1)	29.6	(7.7)
Principal payments on finance lease obligations	(7.1)	(9.2)	(10.5)
Dividends paid to shareholders	(24.8)	(19.9)	(6.4)
Share repurchases	(113.9)	(50.0)	(1.8)
Contingent payment related to acquisitions	(0.3)
Tax withholdings on stock-based compensation awards	(3.2)	(2.7)
Net cash used in financing activities	(88.3)	(350.1)	(137.9)
Net increase (decrease) in cash, cash equivalents, and restricted cash	14.7	(8.9)	(8.5)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	0.2	(3.0)	(1.6)
Net change in cash, cash equivalents, and restricted cash	14.9	(11.9)	(10.1)
Cash, cash equivalents, and restricted cash—beginning of period	40.5	52.4	62.5
Cash, cash equivalents, and restricted cash—end of period	55.4	40.5	52.4
Cash paid during the period for:
Interest paid to third parties, net	29.9	38.3	51.1
Income taxes, net	6.2	176.9	70.2
Noncash activities:
Asset additions under operating leases	138.8	61.6	129.6
Asset additions under finance leases	$ 5.3	$ 3.9	$ 15.8