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Employee Benefit Plans - Schedule of Plans for which Accumulated Benefit Obligations Exceeds Plan Assets (Detail) - Defined Benefit Pension Plans - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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U.S. |  |
Plans for which the ABO exceeds plan assets: |  |
Projected benefit obligations | $ 63.0 | $ 62.8
Accumulated benefit obligations | 63.0 | 62.8
Fair value of plan assets | 46.5 | 45.6
Foreign |  |
Plans for which the ABO exceeds plan assets: |  |
Projected benefit obligations | 625.1 | 541.5
Accumulated benefit obligations | 603.8 | 521.8
Fair value of plan assets | $ 375.0 | $ 319.5

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- Definition Amount of accumulated benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 + Details
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