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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets |  |
Net operating loss carryforwards | $ 21.4 | $ 21.9
Tax credit carryforwards | 2.0 | 2.8
Restructuring and impairment charges | 0.4 | 0.0
Pension and deferred compensation | 35.3 | 25.6
Other | 10.6 | 9.2
Valuation allowance | (15.1) | (15.9)
Total deferred tax assets | 54.6 | 43.6
Deferred tax liabilities: |  |
Property, plant, and equipment | 42.1 | 37.9
Tax on undistributed earnings of subsidiaries | 6.5 | 6.3
Other | 0.4 | 0.9
Total deferred tax liabilities | 49.0 | 45.1
Net deferred tax (liability) asset | $ 5.6 |
Net deferred tax (liability) asset |  | $ (1.5)

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