Retirement Benefit Plans - Summary of Benefits Expected to be Paid Out (Detail) $ in Millions	Dec. 31, 2020 USD ($)
U.S. and Puerto Rico [Member]
Schedule of Expected Future Pension Benefit Payment [Line Items]
2021	$ 22.2
2022	23.1
2023	24.1
2024	24.4
2025	25.4
2026-2030	130.5
Foreign [Member]
Schedule of Expected Future Pension Benefit Payment [Line Items]
2021	32.6
2022	32.9
2023	32.9
2024	32.9
2025	34.8
2026-2030	$ 174.5

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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

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

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

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

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

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