Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income from Operations Before Provision for Taxes [Abstract]
Domestic	$ 39.3	$ 66.0	$ 21.4
Foreign	117.4	136.3	116.6
Income before tax and equity in earnings	156.7	202.3	138.0
Domestic [Abstract]
Taxes currently payable, Federal	16.3	(5.3)	(7.1)
Taxes currently payable, State and local	3.3	0.4	0.2
Deferred income taxes	(16.0)	7.8	2.2
Domestic tax provision (benefit)	3.6	2.9	(4.7)
Foreign [Abstract]
Taxes currently payable	29.8	33.4	34.0
Deferred income taxes	(1.3)	0.3	(4.9)
Foreign tax provision	28.5	33.7	29.1
Total tax provision (benefit)	$ 32.1	$ 36.6	$ 24.4
Reconciliation of Statutory to Effective Tax Rate [Abstract]
U.S. statutory rate	21.00%	21.00%	21.00%
Depletion	(6.10%)	(5.40%)	(6.20%)
Difference between tax provided on foreign earnings and the U.S. statutory rate	2.40%	2.60%	3.30%
Global Intangible Low-Tax Income (GILTI)	2.30%	0.70%	0.40%
Foreign Derived Intangible Income	0.00%	(1.40%)	(1.00%)
State and local taxes, net of federal tax benefit	(0.40%)	0.70%	0.00%
Tax credits and foreign dividends	(0.40%)	(0.40%)	(0.60%)
Impact of uncertain tax positions	(1.30%)	(1.10%)	(0.20%)
Impact of officer's non-deductible compensation	1.30%	0.80%	1.00%
Other	1.70%	0.60%	0.00%
Consolidated effective tax rate	20.50%	18.10%	17.70%
Deferred Tax Assets [Abstract]
Accrued liabilities	$ 28.6	$ 29.7
Net operating loss carry forwards	35.5	31.8
Pension and post-retirement benefits costs	18.6	31.4
Other	29.7	22.4
Valuation allowance	(24.0)	(22.3)
Total deferred tax assets	88.4	93.0
Deferred Tax Liabilities [Abstract]
Plant and equipment, principally due to differences in depreciation	167.0	178.8
Intangible assets	67.8	69.3
Other	9.6	10.0
Total deferred tax liabilities	244.4	258.1
Net deferred tax asset (liability), long-term	(156.0)	(165.1)
Net Deferred Tax Assets and Liabilities [Abstract]
Net deferred tax asset, long-term	24.4	23.0
Net deferred tax liability, long-term	180.4	188.1
Net deferred tax asset (liability), long-term	(156.0)	(165.1)
Operating Loss Carryforwards [Abstract]
Operating loss carry forwards	35.5	31.8
Operating loss carryforwards subject to expiration	20.0
Operating loss carryforwards not subject to expiration	$ 15.5
Expiration period of operating loss carryforwards	20 years
Unrecognized Tax Benefits [Abstract]
Unrecognized tax benefits that would impact effective tax rate if recognized	$ 2.0
Unrecognized Tax Benefits [Roll forward]
Balance at beginning of the year	5.1	7.6
Increases related to current year tax positions	0.4	0.6
Increases related to new judgments	0.0	0.2
Decreases related to audit settlements and statute expirations	(2.9)	(3.3)
Balance at the end of the year	2.6	5.1	$ 7.6
Income Tax Penalties and Interest Expense [Abstract]
Unrecognized tax benefits, interest and penalties	0.7
Unrecognized tax benefits, accrued interest and penalties	0.4
Cash Paid for Income Taxes [Abstract]
Net cash paid for income taxes	44.0	$ 42.5	$ 28.5
Undistributed Earnings of Foreign Subsidiaries [Abstract]
Foreign subsidiaries' undistributed earnings	478.2
Deferred tax liabilities with respect to foreign withholding taxes or state taxes have been recognized	$ 0.0