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Income Tax Matters - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Deferred income tax assets: |  |
Loss and credit carryforwards | $ 51.5 | $ 33.4
Pension Benefits | 7.1 | 4.8
Other assets | 29.0 | 29.4
Leased assets | 11.7 | 7.3
Inventories | 50.4 | 6.9
Valuation allowances | (4.6) | (6.4)
Total deferred income tax assets | 145.1 | 75.4
Deferred income tax liabilities: |  |
Property, plant and equipment | (138.9) | (80.8)
Leased liability | (10.9) | (6.4)
Undistributed foreign earnings | (2.4) | (2.1)
Total deferred income tax liabilities | (152.2) | (89.3)
Net deferred income tax liabilities | $ (7.1) | $ (13.9)

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