Annual report pursuant to Section 13 and 15(d)

Financial Instruments (Details) (Narrative)

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Financial Instruments (Details) (Narrative) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 28, 2019
Sep. 28, 2019
Dec. 29, 2018
Sep. 14, 2016
Schedule of Investments [Line Items]        
Conversion price (USD per share)       $ 8.00
Foreign Currency Forward Contracts        
Schedule of Investments [Line Items]        
Derivative, notional amount $ 739   $ 396  
Derivative, term of contract 12 months      
Government money Market Funds | Level 1        
Schedule of Investments [Line Items]        
Cash equivalents pledged as collateral $ 4   5  
Mutual Funds | Level 1        
Schedule of Investments [Line Items]        
Restricted investments $ 30   $ 21  
2.125% Notes        
Schedule of Investments [Line Items]        
Interest rate, stated percentage 2.125% 2.125%   2.125%
Debt instrument, stock price (USD per share) $ 46.18      
Conversion price (USD per share)   $ 8.00