Postretirement Benefits Other Than Pensions - Schedule of Weighted Average Assumptions Used to Determine Net Periodic Benefit Costs (Detail)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Plan [Member]
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	3.65%	3.40%	3.70%
UNITED STATES
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.20%	3.55%	3.95%

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

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 (k)(1)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration