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Schedule of Pension Plans with Accumulated Benefit Obligation and Projected Benefit Obligation in Excess of Plan Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
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United States Pension Plans, Defined Benefit |  |
Defined Benefit Plan Disclosure |  |
Projected benefit obligation | $ 54.0 | $ 53.3
Accumulated benefit obligation | 48.0 | 47.3
Foreign Pension Plans, Defined Benefit |  |
Defined Benefit Plan Disclosure |  |
Projected benefit obligation | 34.3 | 35.2
Accumulated benefit obligation | 30.1 | 29.5
Fair value of plan assets | $ 1.1 | $ 1.0

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