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Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred income tax assets |  |
Net operating loss tax carryovers | $ 298.7 | $ 309.4
Pensions | 94.3 | 153.8
Postretirement benefits other than pensions | 69.8 | 86.5
Tax credits | 40.2 | 37.7
Other items | 103.9 | 82.9
Gross deferred income tax assets | 606.9 | 670.3
Valuation allowance for deferred tax assets | (431.0) | (461.8)
Total deferred income tax assets | 175.9 | 208.5
Deferred income tax liabilities |  |
Bases of property, plant and equipment | 114.0 | 119.2
Inventory valuation | 32.5 | 53.3
Bases of amortizable intangible assets | 18.0 | 12.5
Other items | 24.7 | 35.9
Total deferred tax liabilities | 189.2 | 220.9
Net deferred tax (liability) | $ (13.3) | $ (12.4)

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