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Income Taxes Reconciliation of deferred taxes (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Valuation Allowance [Line Items] |  |
Accrued liabilities | $ 21.4 | $ 26.6
Pension and post-retirement benefits | 8.3 | 19.9
Share-based compensation | 5.3 | 6.9
Benefit of capital loss and NOL carryovers | 15.8 | 38.9
Other | 13.1 | 10.2
Inventory | 7.7 | 6.6
Market value write down of ARS | 3.3 | 4.9
Benefit of tax credit carryovers | 0.4 | 3.5
Valuation Allowance, Amount | (12.0) | (13.6)
Deferred Tax Assets, Net | 63.3 | 103.9
Property, plant and equipment | (111.8) | (118.2)
Timber and timberlands | 9.8 | 11.4
Installment sale gain deferral | 0.0 | 5.2
Total Deferred Tax Liabilities | (121.6) | (134.8)
Deferred Tax Liabilities, Net | (58.3) | (30.9)
Long-term deferred tax asset | (3.9) | (2.5)
Long-term deferred tax liability | $ (62.2) | $ (33.4)

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