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Income Taxes - Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Restructuring reserves | $ 8.4 | $ 2.7
Accruals not yet deductible for tax purposes | 9.1 | 10.7
Net operating loss carryforwards | 265.5 | 199.4
Foreign, federal and state credits | 10.4 | 69.2
Employee benefit items | 77.0 | 69.6
Capitalized expenses | 8.9 | 10.8
Derivatives and other | 38.0 | 23.7
Sub-total deferred tax assets | 417.3 | 386.1
Valuation allowance | (218.4) | (189.2)
Total deferred tax assets | 198.9 | 196.9
Depreciation and amortization | (26.8) | (13.9)
Unremitted foreign earnings | 0.0 | (9.0)
Intangible assets | (21.7) | (26.3)
Other | (0.4) | 0.0
Total deferred tax liabilities | (48.9) | (49.2)
Net deferred tax assets | $ 150.0 | $ 147.7

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