CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities:
Net income	$ 170.9	$ 88.3	$ 126.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	94.9	95.0	94.2
Loss (gain) on disposal of property, plant and equipment	(11.8)	2.0	(0.1)
Deferred income taxes	(7.6)	(34.8)	(17.2)
Pension amortization and settlement loss	1.1	2.3	8.4
Provision for bad debts	1.4	2.8	4.1
Stock-based compensation	11.8	11.3	10.4
Impairment of assets	0.0	71.7	0.0
Provision for credit losses	30.0	0.0	0.0
Reduction of right of use asset	14.4	14.1	12.8
Non-cash debt extinguishment expenses	1.8	0.0	6.9
Restructuring costs	0.0	6.9	0.0
Other non-cash items	(6.6)	(4.3)	(1.7)
Changes in operating assets and liabilities
Accounts receivable	5.2	1.8	(48.3)
Inventories	(26.2)	18.7	(66.1)
Pension plan funding	(11.7)	(9.9)	(9.1)
Accounts payable	2.3	(2.9)	7.2
Restructuring liabilities	(1.4)	(2.8)	(0.7)
Income taxes payable	5.8	6.7	11.7
Prepaid expenses and other	(37.9)	(33.3)	(33.1)
Net cash provided by operating activities	236.4	233.6	105.7
Investing Activities:
Purchases of property, plant and equipment	(89.5)	(93.5)	(82.3)
Cash paid for acquisitions, net of cash acquired	(4.0)	(1.8)	(22.4)
Proceeds from sale of assets	12.3	0.2	1.0
Purchases of short-term investments	(8.6)	(17.9)	(6.6)
Proceeds from sale of short-term investments	8.0	20.0	6.7
Other investing activities	(12.7)	1.3	2.0
Net cash used in investing activities	(94.5)	(91.7)	(101.6)
Financing Activities:
Long-term debt issuance	575.0	0.0	550.0
Debt issuance costs	(6.7)	0.0	(3.3)
Repayment of long-term debt	(533.6)	(14.8)	(552.3)
Proceeds from issuance of short-term debt	0.0	0.0	39.3
Repayment of short-term debt	(80.2)	(34.5)	0.0
Purchase of common stock for treasury	(63.6)	(14.2)	(56.0)
Proceeds from issuance of stock under option plan	15.7	5.1	5.7
Tax withholding payments for stock-based compensation	(2.8)	(2.8)	(3.3)
Dividends paid to non-controlling interests	(1.0)	(2.4)	(7.7)
Cash dividends paid	(13.2)	(8.1)	(6.5)
Net cash provided by (used in) financing activities	(110.4)	(71.7)	(34.1)
Effect of exchange rate changes on cash and cash equivalents	(15.6)	(0.2)	(22.3)
Net increase (decrease) in cash and cash equivalents	15.9	70.0	(52.3)
Cash and cash equivalents at beginning of period	317.2	247.2	299.5
Cash and cash equivalents at end of period	333.1	317.2	247.2
Non-cash investing and financing activities
Property, plant and equipment additions related to asset retirement obligations	7.0	0.0	0.0
Treasury stock purchases settled after period end	0.1	0.6	0.0
Excise tax charged to equity not paid	$ 0.4	$ 0.0	$ 0.0