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Our Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Property, Plant and Equipment [Line Items]      
Capitalized Computer Software, Amortization $ 152 $ 166 $ 204
Capitalized Computer Software, Net $ 664 $ 572  
Minimum | Software      
Property, Plant and Equipment [Line Items]      
Finite-Lived Intangible Asset, Useful Life 5 years    
Maximum | Software      
Property, Plant and Equipment [Line Items]      
Finite-Lived Intangible Asset, Useful Life 10 years