Retirement Benefit Plans - Weighted Average Actuarial Assumptions Used to Determine Projected Benefit Obligation for Defined Benefit Retirement Plans (Detail)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
U.S. and Puerto Rico [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate	2.70%	3.40%	4.38%
Rate of compensation increase		3.29%	3.29%
Foreign [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Discount rate	0.61%	0.74%	1.41%
Rate of compensation increase	2.36%	2.45%	2.13%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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

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- Definition

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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- Definition

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

+ References

No definition available.

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- Details

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