Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments (Narrative) (Details)

v3.10.0.1
Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 29, 2018
Dec. 30, 2017
Schedule of Investments [Line Items]    
Carrying value of cost method investments $ 3 $ 3
Foreign Currency Forward Contracts    
Schedule of Investments [Line Items]    
Contract maturity period 12 months  
Maximum length of time hedged in foreign currency cash flow hedges 12 months  
Cash Flow Hedging | Foreign Currency Forward Contracts    
Schedule of Investments [Line Items]    
Derivative, notional amount $ 326 300
Level 1 | Government money market funds    
Schedule of Investments [Line Items]    
Investment in money market fund and bank guarantee 5 2
Level 1 | Mutual funds    
Schedule of Investments [Line Items]    
Restricted investments $ 22 $ 18