Income Taxes Reconciliation of deferred taxes (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Accrued liabilities	$ 20.0	$ 23.0
Pension and post-retirement benefits	4.0	5.0
Share-based compensation	4.0	4.0
Benefit of capital loss and NOL carryovers	7.0	9.0
Other	9.0	12.0
Inventory	8.0	7.0
Deferred Tax Liabilities, Leasing Arrangements	8.0	5.0
Valuation Allowance, Amount	(10.0)	(10.0)
Deferred Tax Assets, Net of Valuation Allowance	50.0	55.0
Deferred Tax Assets, Net	60.0	65.0
Property, plant and equipment	(112.0)	(109.0)
Timber and timberlands	8.0	9.0
Installment sale gain deferral	6.0	7.0
Total Deferred Tax Liabilities	(134.0)	(130.0)
Deferred Tax Liabilities, Net	(84.0)	(75.0)
Long-term deferred tax asset	(2.0)	(3.0)
Long-term deferred tax liability	$ (86.0)	$ (78.0)