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Restricted Cash Restricted Cash (Details) - USD ($)
$ in Millions
Sep. 07, 2019
Dec. 29, 2018
Sep. 08, 2018
Dec. 30, 2017
Restricted Cash and Cash Equivalents Items [Line Items]        
Cash and cash equivalents $ 5,494 $ 8,721    
Restricted Cash, Current 127 1,997    
Restricted cash included in other assets 86 51    
Total Cash and Cash Equivalents and Restricted Cash $ 5,707 $ 10,769 $ 12,043 $ 10,657