Income Taxes Reconciliation of deferred taxes (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Valuation Allowance [Line Items]
Property, plant and equipment	$ 164.2	$ 165.2
Deferred Tax Liabilities	23.4	94.7
Inventory	(6.9)	(7.7)
Accrued liabilities	(83.9)	(79.7)
Deferred Tax Assets, Operating Loss Carryforwards	(83.4)	(137.3)
Deferred Tax Assets, Tax Credit Carryforwards, Other	3.7	21.0
Deferred Tax Liabilities, Other	(11.6)	(12.6)
Valuation Allowance, Amount	37.9	56.1
Long-term deferred tax asset	(4.3)	(4.8)
Long-term deferred tax liability	27.7	99.5
Timber Properties
Valuation Allowance [Line Items]
Deferred Tax Liabilities	11.6	12.0
Installment sales gain deferral
Valuation Allowance [Line Items]
Deferred Tax Liabilities	8.0	128.5
Undistributed Income from Other than Gain (Loss) on Sale of Properties
Valuation Allowance [Line Items]
Deferred Tax Liabilities	$ 8.8	$ 8.8