Supplemental Financial Information (Schedule of Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Accounts and notes receivable
Trade receivables	$ 7,172	$ 6,892
Other receivables	1,655	1,713
Total receivables	8,827	8,605
Analysis of valuation allowances
Allowance, beginning of year	201	105	$ 101
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification (Pre-Tax)	0	44	0
Net amounts charged to expense	(19)	79	22
Accounts Receivable, Credit Loss Expense (reversal) Novel Coronavirus (COVID-19) Impact	(32)	56
Deductions	(25)	(32)	(30)
Other	(10)	5	12
Allowance, end of year	147	201	105
Net receivables	8,680	8,404
Inventories (c)
Raw materials	1,898	1,720
Work-in-process	151	205
Finished goods	2,298	2,247
Inventories	4,347	4,172
Property, plant and equipment, net [Abstract]
Property, plant and equipment, gross	46,828	46,340
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	24,421	24,971
Property, Plant and Equipment, net	22,407	21,369
Depreciation	2,484	2,335	$ 2,257
Other assets
Other Assets	4,204	3,312
Noncurrent notes and accounts receivable	111	109
Deferred marketplace spending	119	130
Prepaid Expense and Other Assets, Noncurrent	1,260	910
Operating Lease, Right-of-Use Asset	2,020	1,670
Other Assets, Miscellaneous	694	493
Accounts payable and other current liabilities
Accounts payable	9,834	8,853
Accrued marketplace spending	3,087	2,935
Accrued compensation and benefits	2,324	2,059
Dividends payable	1,508	1,430
Business Combination, Contingent Consideration, Liability	0	861
Operating Lease, Liability, Current	446	460
Other current liabilities	3,960	3,855
Accounts payable and other current liabilities	21,159	19,592
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 46,828	$ 46,340
Maximum [Member]
Property, Plant and Equipment [Line Items]
Percentage of LIFO Inventory	7.00%	6.00%
Percentage of LIFO Inventory	7.00%	6.00%
Land [Member]
Property, plant and equipment, net [Abstract]
Property, plant and equipment, gross	$ 1,123	$ 1,171
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,123	1,171
Buildings And Improvements
Property, plant and equipment, net [Abstract]
Property, plant and equipment, gross	10,279	10,214
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,279	10,214
Buildings And Improvements | Maximum
Property, Plant and Equipment [Line Items]
Average Useful Life (Years)	44 years
Buildings And Improvements | Minimum
Property, Plant and Equipment [Line Items]
Average Useful Life (Years)	15 years
Construction In Progress
Property, plant and equipment, net [Abstract]
Property, plant and equipment, gross	$ 3,940	3,679
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,940	3,679
Machinery And Equipment, Including Fleet And Software
Property, plant and equipment, net [Abstract]
Property, plant and equipment, gross	31,486	31,276
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 31,486	$ 31,276
Machinery And Equipment, Including Fleet And Software | Maximum
Property, Plant and Equipment [Line Items]
Average Useful Life (Years)	15 years
Machinery And Equipment, Including Fleet And Software | Minimum
Property, Plant and Equipment [Line Items]
Average Useful Life (Years)	5 years