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Income Tax Matters, Components of Deferred Tax Assets and Liabilities Table (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred income tax assets: |  |
Loss and credit carryforwards | $ 48.7 | $ 98.7
Salaried VEBA (see Note 4) | 8.0 | 11.6
Other assets | 27.2 | 21.0
Inventories | 20.0 | 9.3
Valuation allowances | (8.4) | (13.0)
Total deferred income tax assets | 95.5 | 127.6
Deferred income tax liabilities: |  |
Property, plant and equipment | (62.0) | (57.7)
Undistributed foreign earnings | (1.8) | (2.2)
Total deferred income tax liabilities | (63.8) | (59.9)
Net deferred income tax assets | 31.7 | 67.7
Net deferred income tax assets, long term | 35.9 | 72.0
Deferred tax liability, long term | $ (4.2) | $ (4.3)

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