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Debt Long-term Debt Footnote K (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
May 31, 2012
Sep. 28, 2019
Jan. 02, 2021
Dec. 28, 2019
Mar. 31, 2014
Debt Instrument [Line Items]            
Interest expense $ 20   $ 16 $ 281 $ 284  
Debt repurchase amount     $ 1,000      
Notional amounts of interest rate swaps       7,213 $ 6,563  
3.125% U.S. Dollar Debentures Due 2022            
Debt Instrument [Line Items]            
Interest expense       17    
Debt Instrument, Face Amount   $ 700        
Debt repurchase amount $ 358     $ 358   $ 342
Debt Instrument, Term   10 years        
Debt instrument, stated interest rate 3.125% 3.125%