Legal Proceedings Legal Proceedings (Details) - Germany - Lufthansa Technik AG $ in Millions	6 Months Ended
Jul. 01, 2017 USD ($) product
Loss Contingencies [Line Items]
Number of products in distribution channels \| product	0
Patent Infringement
Loss Contingencies [Line Items]
Appeal process duration (in years, up to)	2 years
Patent Infringement \| AES \| Minimum
Loss Contingencies [Line Items]
Estimate of the value of the dispute	$ 1
Patent Infringement \| AES \| Maximum
Loss Contingencies [Line Items]
Estimate of the value of the dispute	$ 3

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349

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