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Debt Long-term Debt Footnote N (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2010
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Jul. 31, 2016
Debt Instrument [Line Items]            
Interest expense     $ 287 $ 256    
Notional amounts of interest rate swaps     $ 5,085 $ 4,966    
4.0% U.S. Dollar Notes Due 2020            
Debt Instrument [Line Items]            
Debt Instrument, Face Amount   $ 1,000        
Debt Instrument, Term   10 years        
Debt instrument, stated interest rate   4.00%        
Debt Instrument, Interest Rate, Effective Percentage     3.37%      
Debt Instrument Amount Redeemed $ 150          
Interest expense 12          
Debt instrument accelerated gains 7          
Debt instrument, fee amount $ 1          
Notional amounts of interest rate swaps         $ 600 $ 700
Unamortized gain (loss) on termination of interest rate swaps     $ 1