Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income (Loss) from Operations [Abstract]
Domestic	$ 40.7	$ (38.9)	$ 39.3
Foreign	182.9	146.6	117.4
Income before tax and equity in earnings	223.6	107.7	156.7
Domestic [Abstract]
Taxes currently payable, Federal	20.0	9.5	16.3
Taxes currently payable, State and local	2.8	6.7	3.3
Deferred income taxes	(12.3)	(31.5)	(16.0)
Domestic tax provision (benefit)	10.5	(15.3)	3.6
Foreign [Abstract]
Taxes currently payable	44.2	42.2	29.8
Deferred income taxes	4.7	(3.2)	(1.3)
Foreign tax provision	48.9	39.0	28.5
Total tax provision	$ 59.4	$ 23.7	$ 32.1
Reconciliation of Statutory to Effective Tax Rate [Abstract]
U.S. statutory rate	21.00%	21.00%	21.00%
Depletion	(4.40%)	(10.30%)	(6.10%)
Difference between tax provided on foreign earnings and the U.S. statutory rate	4.70%	7.70%	2.40%
Global Intangible Low-Tax Income (GILTI)	0.10%	1.00%	2.30%
Foreign Derived Intangible Income	(1.00%)	(2.50%)	0.00%
State and local taxes, net of federal tax benefit	1.40%	(0.10%)	(0.40%)
Tax credits	(0.70%)	(0.60%)	(0.40%)
Bankruptcy Funding	3.10%	0.00%	0.00%
Impact of uncertain tax positions	(0.30%)	0.20%	(1.30%)
Impact of officer's non-deductible compensation	1.10%	1.90%	1.30%
Foreign Withholding Tax	0.80%	2.00%	1.20%
Other	0.80%	1.70%	0.50%
Consolidated effective tax rate	26.60%	22.00%	20.50%
Deferred Tax Assets [Abstract]
Accrued liabilities	$ 31.4	$ 26.8
Net operating loss carry forwards	23.2	32.8
Pension and post-retirement benefits costs	2.9	16.0
Interest	16.2	9.1
Research and development capitalization	11.0	7.7
Valuation allowance	(20.6)	(25.2)
Other	13.3	21.3
Total deferred tax assets	77.4	88.5
Deferred Tax Liabilities [Abstract]
Plant and equipment, principally due to differences in depreciation	138.0	146.0
Intangible assets	49.5	53.6
Other	5.6	12.2
Total deferred tax liabilities	193.1	211.8
Net deferred tax liability, long-term	(115.7)	(123.3)
Net Deferred Tax Assets and Liabilities [Abstract]
Net deferred tax asset, long-term	14.8	16.0
Net deferred tax liability, long-term	130.5	139.3
Net deferred tax liability, long-term	(115.7)	(123.3)
Operating Loss Carryforwards [Abstract]
Operating loss carry forwards	23.2	32.8
Operating loss carryforwards subject to expiration	$ 14.2
Expiration period of operating loss carryforwards	20 years
Operating loss carryforwards not subject to expiration	$ 9.0
Unrecognized Tax Benefits [Abstract]
Unrecognized tax benefits that would impact effective tax rate if recognized	1.3
Unrecognized Tax Benefits [Roll forward]
Balance at beginning of the year	2.8	2.6
Increases related to current year tax positions	0.5	0.5
Decreases related to audit settlements and statute expirations	(1.4)	(0.3)
Balance at the end of the year	1.9	2.8	$ 2.6
Income Tax Penalties and Interest Expense [Abstract]
Unrecognized tax benefits, interest and penalties	0.1
Unrecognized tax benefits, accrued interest and penalties	0.4
Cash Paid for Income Taxes [Abstract]
Net cash paid for income taxes	70.8	$ 53.8	$ 44.0
Undistributed Earnings of Foreign Subsidiaries [Abstract]
Foreign subsidiaries' undistributed earnings	497.7
Deferred tax liabilities with respect to foreign withholding taxes or state taxes have been recognized	$ 0.0