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Debt Long-term Debt Footnote J (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
Feb. 28, 2013
Sep. 28, 2019
Jan. 02, 2021
Dec. 28, 2019
Sep. 30, 2016
Mar. 31, 2014
Debt Instrument [Line Items]              
Debt repurchase amount     $ 1,000        
Interest expense $ 20   $ 16 $ 281 $ 284    
Notional amounts of interest rate swaps       7,213 $ 6,563    
2.75% U.S. Dollar Note Due 2023              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount   $ 400          
Debt repurchase amount             $ 189
Debt Instrument, Term   10 years          
Debt instrument, stated interest rate   2.75%          
Debt Instrument, Interest Rate, Effective Percentage   4.17%          
Notional amounts of interest rate swaps           $ 211  
Unamortized gain (loss) on termination of interest rate swaps       $ (6)      
4.25% U.S. Dollar Notes Due 2013              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount   $ 750          
Debt instrument, stated interest rate   4.25%