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Supplemental Financial Information (Schedule of Other Supplemental Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Supplemental Financial Information [Abstract]        
Tax payments related to the TCJ Act $ 423 $ 115 $ 0  
Cash and cash equivalents 5,509 8,721    
Operating Leases, Future Minimum Payments Due, Next Twelve Months   459    
Rent expense   771 742  
Interest paid 1,076 1,388 1,123  
Income taxes paid, net of refunds 2,226 1,203 1,962  
Operating Leases, Future Minimum Payments, Due in Two Years   406    
Operating Leases, Future Minimum Payments, Due in Three Years   294    
Operating Leases, Future Minimum Payments, Due in Four Years   210    
Operating Leases, Future Minimum Payments, Due in Five Years   161    
Operating Leases, Future Minimum Payments Due   1,840    
Restricted Cash, Current 0 1,997    
Restricted Cash, Noncurrent 61 51    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 5,570 $ 10,769 $ 10,657 $ 9,169