Financial Instruments (Summary of Derivative Instruments) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 30, 2017
Level 2 \| Cash Flow Hedging \| Foreign Currency Forward Contracts
Foreign Currency Forward Contracts - gains (losses)
Contracts designated as cash flow hedging instruments	$ (8)	$ 7

Fair value as of the balance sheet date of all derivatives designated as foreign currency fair value hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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