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Employee Benefits - Percentage of Assets Invested (Detail) - Pension Plan [Member]	Dec. 31, 2020	Dec. 31, 2019
U.S Plans [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	1.00%	1.00%
U.S Plans [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	29.00%	13.00%
U.S Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	70.00%	86.00%
U.S Plans [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	0.00%	0.00%
U.S Plans [Member] | Alternative and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	0.00%	0.00%
Non-U.S. Plans [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	3.00%	1.00%
Non-U.S. Plans [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	10.00%	14.00%
Non-U.S. Plans [Member] | Fixed income [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	38.00%	37.00%
Non-U.S. Plans [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	8.00%	8.00%
Non-U.S. Plans [Member] | Alternative and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of assets invested	41.00%	40.00%

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- Definition

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+ References

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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