Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Contingent Liabilities - Additional Information (Detail) € in Millions, Vehicle in Millions		1 Months Ended
	Jun. 29, 2016 Vehicle	Mar. 31, 2019 USD ($)	Mar. 31, 2019 EUR (€)	Nov. 30, 2017 USD ($)	Nov. 30, 2017 EUR (€)	Jun. 30, 2011 Facility	Jun. 30, 2020 USD ($)
Damages from Product Defects
Loss Contingencies [Line Items]
Number of vehicles recalled \| Vehicle	1.4
Damages from Product Defects \| Maximum
Loss Contingencies [Line Items]
Range of possible loss \| $							$ 20,000,000
Litigation with European Commission
Loss Contingencies [Line Items]
Number of facilities visited \| Facility						2
Loss contingency, accrual		$ 203,000,000	€ 179.0	$ 9,700,000	€ 8.1