CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities:
Net income	$ 88.3	$ 126.3	$ 168.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	95.0	94.2	94.6
Loss (gain) on disposal of property, plant and equipment	2.0	(0.1)	0.4
Deferred income taxes	(34.8)	(17.2)	2.1
Pension amortization and settlement loss	2.3	8.4	13.1
Provision for bad debts	2.8	4.1	0.9
Stock-based compensation	11.3	10.4	10.7
Impairment of assets	71.7	0.0	0.7
Reduction of right of use asset	14.1	12.8	12.3
Non-cash debt extinguishment expenses	0.0	6.9	0.0
Restructuring costs	6.9	0.0	0.4
Other non-cash items	(4.3)	(1.7)	(3.2)
Changes in operating assets and liabilities
Accounts receivable	1.8	(48.3)	(7.2)
Inventories	18.7	(66.1)	(58.2)
Pension plan funding	(9.9)	(9.1)	(11.1)
Accounts payable	(2.9)	7.2	43.0
Restructuring liabilities	(2.8)	(0.7)	(1.4)
Income taxes payable	6.7	11.7	(6.0)
Prepaid expenses and other	(33.3)	(33.1)	(27.2)
Net cash provided by operating activities	233.6	105.7	232.4
Investing Activities:
Purchases of property, plant and equipment	(93.5)	(82.3)	(86.0)
Cash paid for acquisitions, net of cash acquired	(1.8)	(22.4)	(194.4)
Proceeds from sale of assets	0.2	1.0	0.7
Purchases of short-term investments	(17.9)	(6.6)	(9.4)
Proceeds from sale of short-term investments	20.0	6.7	8.3
Other investing activities	1.3	2.0	2.2
Net cash used in investing activities	(91.7)	(101.6)	(278.6)
Financing Activities:
Long-term debt issuance	0.0	550.0	0.0
Debt issuance costs	0.0	(3.3)	0.0
Repayment of long-term debt	(14.8)	(552.3)	(1.2)
Proceeds from issuance of short-term debt	0.0	39.3	100.5
Repayment of short-term debt	(34.5)	0.0	(20.5)
Purchase of common stock for treasury	(14.2)	(56.0)	(74.7)
Proceeds from issuance of stock under option plan	5.1	5.7	12.8
Tax withholding payments for stock-based compensation	(2.8)	(3.3)	(2.7)
Dividends paid to non-controlling interests	(2.4)	(7.7)	(1.8)
Cash dividends paid	(8.1)	(6.5)	(6.8)
Net cash provided by (used in) financing activities	(71.7)	(34.1)	5.6
Effect of exchange rate changes on cash and cash equivalents	(0.2)	(22.3)	(27.6)
Net increase (decrease) in cash and cash equivalents	70.0	(52.3)	(68.2)
Cash and cash equivalents at beginning of period	247.2	299.5	367.7
Cash and cash equivalents at end of period	317.2	247.2	299.5
Non-cash financing activities
Treasury stock purchases settled after period end	$ 0.6	$ 0.0	$ 0.5