Sales Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 29, 2018 USD ($)	Jun. 29, 2018 USD ($)
Revenue Recognition [Abstract]
Recognized revenue from opening liability balance	$ 21	$ 64
Revenue, Remaining Performance Obligation, Percentage Recognized in Year Two	40.00%	40.00%
Revenue, Remaining Performance Obligation, Percentage Recognized in Year Three	70.00%	70.00%

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

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