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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets |  |
Net operating loss carryforwards | $ 14.0 | $ 21.4
Tax credit carryforwards | 1.5 | 2.0
Pension and deferred compensation | 31.6 | 35.3
Royalty acceleration | 45.1 | 0.0
Other | 12.2 | 11.0
Valuation allowance | (12.2) | (15.1)
Total deferred tax assets | 92.2 | 54.6
Deferred tax liabilities: |  |
Property, plant, and equipment | 47.2 | 42.1
Tax on undistributed earnings of subsidiaries | 1.8 | 6.5
Other | (0.4) | 0.4
Total deferred tax liabilities | 48.6 | 49.0
Net deferred tax asset (liability) | $ 43.6 | $ 5.6

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