Contingent Liabilities - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Other current assets	$ 25	$ 0
Estimated cost accrued	6
Guarantee obligations	15	$ 13
Indemnification Asset
Loss Contingencies [Line Items]
Other current assets	$ 23

Recorded amount of the accrual for a material component of a product liability contingency.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.Y.Q2)
-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

Name:	us-gaap_ProductLiabilityAccrualComponentAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant