Defined Contribution Plans, Pension and Other Post-Retirement Benefit Plans - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail)	Dec. 31, 2018	Dec. 31, 2017
Other Postretirement Benefit Plans \| U.S. Pension and Other Post-Retirement Benefit Plans
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate (as a percent)	4.06%	3.42%
Pension Plans \| Non-U.S. Pension Plans
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]
Discount rate (as a percent)	2.80%	2.45%

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=108410482&loc=d3e1928-114920

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Data Type:	num:percentItemType
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