Retirement Benefit Plan - Summary of Amounts Recognized in AOCI (Detail) $ in Millions	Dec. 31, 2018 USD ($)
U.S. and Puerto Rico [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Unrecognized prior service cost	$ (3.4)
Unrecognized actuarial loss	17.9
Total amount recognized	14.5
Foreign [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Unrecognized prior service cost	(4.1)
Unrecognized actuarial loss	2.5
Total amount recognized	$ (1.6)

Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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 (s)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

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- Definition

Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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- Definition

Pension Plans, Postretirement and Other Employee Benefits [Line Items]

+ References

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