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Income Taxes - Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Tax effect of temporary differences related to: |  |
Inventories | $ 3.7 | $ 5.4
Accrued OPEB costs | 4.0 | 4.8
Accrued pension costs | 44.0 | 52.0
Currency revaluation on intercompany debt | 18.6 | 5.6
Accrued environmental liabilities | 39.9 | 38.8
Other deductible differences | 45.7 | 34.7
Tax loss and tax credit carryforwards | 154.3 | 163.6
Valuation allowance | (168.9) | (0.1)
Adjusted gross deferred tax assets (liabilities) | 141.3 | 304.8
Netting of items by tax jurisdiction, assets | (140.0) | (143.9)
Net noncurrent deferred tax asset (liability) | 1.3 | 160.9
Tax effect of temporary differences related to: |  |
Inventories | (3.7) | (5.2)
Marketable securities | (98.2) | (126.4)
Property and equipment | (96.6) | (109.2)
Other taxable differences | (21.7) | (21.6)
Investments in subsidiaries and affiliates | (238.8) | (278.7)
Tax on unremitted earnings of non-U.S. subsidiaries | (2.0) | (2.6)
Adjusted gross deferred tax assets (liabilities) | (461.0) | (543.7)
Netting of items by tax jurisdiction, liabilities | (140.0) | 143.9
Net noncurrent deferred tax asset (liability) | $ (321.0) | $ (399.8)

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