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Income Taxes - Components of Net Deferred Income Taxes (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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Income Tax Disclosure [Abstract] |  |
Inventories, Assets | $ 3.7 | $ 3.2
Accrued OPEB costs, Assets | 2.0 | 2.0
Accrued pension cost, Assets | 48.3 | 39.4
Currency revaluation on intercompany debt, Assets | 24.0 | 18.6
Other accrued liabilities and deductible differences, Assets | 12.6 | 19.4
Tax loss and tax credit carryforwards, Assets | 145.5 | 157.4
Valuation allowance, Assets | (173.4) | (168.9)
Adjusted gross deferred tax assets | 62.7 | 71.1
Netting by tax jurisdiction, Assets | (54.6) | (57.1)
Net noncurrent deferred tax asset | 8.1 | 14.0
Inventories, Liabilities | (3.7) | (3.5)
Property and equipment, Liabilities | (58.1) | (59.3)
Other taxable differences, Liabilities | (0.4) | (0.5)
Tax on unremitted earnings of non-U.S. subsidiaries, Liabilities | (2.9) | (1.9)
Adjusted gross deferred tax liabilities | (65.1) | (65.2)
Netting by tax jurisdiction, Liabilities | 54.6 | 57.1
Net noncurrent deferred tax liability | $ (10.5) | $ (8.1)

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