Quantitative Information Associated With Fair Value Measurement of Level 3 Financial Instrument (Parenthetical) (Detail) $ in Millions	1 Months Ended
Mar. 31, 2019 USD ($)
Mobile Industrial Robots (MiR)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Payment for contingent consideration	$ 9.1

Amount of cash outflow, made soon after acquisition date of business combination, to settle contingent consideration liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

Name:	us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration