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Debt Long-term Debt Footnote I (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Aug. 31, 2019
Feb. 28, 2013
Dec. 28, 2019
Dec. 29, 2018
Sep. 30, 2016
Mar. 31, 2014
Debt Instrument [Line Items]            
Debt repurchase amount     $ 1,000      
Interest expense $ 15   284 $ 287    
Notional amounts of interest rate swaps     6,563 $ 5,085    
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   4.11%        
Notional amounts of interest rate swaps         $ 211  
Unamortized gain (loss) on termination of interest rate swaps     $ (9)      
4.25% U.S. Dollar Notes Due 2013            
Debt Instrument [Line Items]            
Debt Instrument, Face Amount   $ 750        
Debt instrument, stated interest rate   4.25%