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Income Taxes - Components of Net Deferred Tax Asset (Liability) (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Tax effect of temporary differences related to: |  |
Inventories | $ 4.2 | $ 3.7
Accrued OPEB costs | 3.7 | 4.0
Accrued pension costs | 52.6 | 44.0
Currency revaluation on intercompany debt | 24.0 | 18.6
Accrued environmental liabilities | 41.1 | 39.9
Other deductible differences | 43.0 | 45.7
Tax loss and tax credit carryforwards | 143.8 | 154.3
Valuation allowance | (173.4) | (168.9)
Adjusted gross deferred tax assets (liabilities) | 139.0 | 141.3
Netting of items by tax jurisdiction, assets | (137.8) | (140.0)
Net noncurrent deferred tax asset (liability) | 1.2 | 1.3
Tax effect of temporary differences related to: |  |
Inventories | (4.0) | (3.7)
Marketable securities | (59.9) | (98.2)
Property and equipment | (91.9) | (96.6)
Other taxable differences | (18.9) | (21.7)
Investments in subsidiaries and affiliates | (235.3) | (238.8)
Tax on unremitted earnings of non-U.S. subsidiaries | (2.8) | (2.0)
Adjusted gross deferred tax assets (liabilities) | (412.8) | (461.0)
Netting of items by tax jurisdiction, liabilities | (137.8) | (140.0)
Net noncurrent deferred tax asset (liability) | $ (275.0) | $ (321.0)

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