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Our Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Dec. 28, 2019
Capitalized Computer Software, Net $ 809 $ 664  
Capitalized Computer Software, Amortization 135 152 $ 166
Shipping and handling expenses 13,700 11,900 10,900
Research and development costs 752 719 711
Amount of prepaid incentive arrangements 262 299  
Advertising and other marketing activities 5,100 4,600 4,700
Advertising expenses 3,500 3,000 3,000
Deferred advertising costs 53 48  
Reserve for Product Returns Novel Coronavirus (COVID-19) Impact   20  
Prepaid Incentives Novel Coronavirus (COVID-19) Impact (23) 59  
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact (32) 56  
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Pre-Tax) $ 0 $ 44 $ 0
Credit Terms, Receivables [Abstract]      
Credit Terms, Receivable U.S. 30 days    
Credit Terms, Receivables International (Outside U.S.) Maximum 90 days    
Credit Terms, Receivables International (Outside U.S.) minimum 30 days