Postretirement Benefits Other Than Pensions - Schedule of Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)	Dec. 31, 2019	Dec. 31, 2018
Foreign Plan [Member]
Weighted average assumptions used to determine benefit obligations
Discount rate	3.05%	3.65%
UNITED STATES
Weighted average assumptions used to determine benefit obligations
Discount rate	3.15%	4.20%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation 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:	instant