Retirement Benefit Plans - Summary of Benefits Expected to be Paid Out (Detail) $ in Millions	Dec. 31, 2018 USD ($)
U.S. and Puerto Rico [Member]
Schedule of Expected Future Pension Benefit Payment [Line Items]
2019	$ 18.8
2020	19.7
2021	20.8
2022	21.9
2023	23.3
2024-2028	126.1
Foreign [Member]
Schedule of Expected Future Pension Benefit Payment [Line Items]
2019	25.0
2020	25.5
2021	25.4
2022	25.8
2023	26.5
2024-2028	$ 140.8

Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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