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
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

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- Definition

Fair value of plan assets for defined benefit pension plan with accumulated benefit obligation in excess of plan assets.

+ References

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- Definition

Amount of projected 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 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921

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