| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] | Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis 
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|  |  | Jun 26, 2021 |  | Dec 26, 2020 |  |  |  
|  |  | Fair Value Measured and Recorded at Reporting Date Using |  |   |  | Fair Value Measured and Recorded at Reporting Date Using |  |  |  |  |  
| (In Millions) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  |  |  
| Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Corporate debt |  | $ | — |  |  | $ | 648 |  |  | $ | — |  |  | $ | 648 |  |  | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | 50 |  |  |  |  
| Financial institution instruments¹ |  | 829 |  |  | 1,064 |  |  | — |  |  | 1,893 |  |  | 2,781 |  |  | 636 |  |  | — |  |  | 3,417 |  |  |  |  
| Government debt² |  | — |  |  | 100 |  |  | — |  |  | 100 |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  
| Reverse repurchase agreements |  | — |  |  | 1,350 |  |  | — |  |  | 1,350 |  |  | — |  |  | 1,900 |  |  | — |  |  | 1,900 |  |  |  |  
| Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Corporate debt |  | — |  |  | 960 |  |  | — |  |  | 960 |  |  | — |  |  | 428 |  |  | — |  |  | 428 |  |  |  |  
| Financial institution instruments¹ |  | — |  |  | 1,484 |  |  | — |  |  | 1,484 |  |  | — |  |  | 1,179 |  |  | — |  |  | 1,179 |  |  |  |  
| Government debt² |  | — |  |  | 570 |  |  | — |  |  | 570 |  |  | — |  |  | 685 |  |  | — |  |  | 685 |  |  |  |  
| Trading assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Corporate debt |  | — |  |  | 4,537 |  |  | — |  |  | 4,537 |  |  | — |  |  | 3,815 |  |  | — |  |  | 3,815 |  |  |  |  
| Financial institution instruments¹ |  | 218 |  |  | 3,568 |  |  | — |  |  | 3,786 |  |  | 131 |  |  | 2,847 |  |  | — |  |  | 2,978 |  |  |  |  
| Government debt² |  | — |  |  | 8,774 |  |  | — |  |  | 8,774 |  |  | — |  |  | 8,945 |  |  | — |  |  | 8,945 |  |  |  |  
| Other current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Derivative assets |  | 39 |  |  | 300 |  |  | — |  |  | 339 |  |  | 48 |  |  | 644 |  |  | — |  |  | 692 |  |  |  |  
| Loans receivable³ |  | — |  |  | 213 |  |  | — |  |  | 213 |  |  | — |  |  | 439 |  |  | — |  |  | 439 |  |  |  |  
| Marketable equity securities |  | 90 |  |  | 1,525 |  |  | — |  |  | 1,615 |  |  | 136 |  |  | 1,694 |  |  | — |  |  | 1,830 |  |  |  |  
| Other long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Corporate debt |  | — |  |  | 892 |  |  | — |  |  | 892 |  |  | — |  | 1,520 |  |  | — |  | 1,520 |  |  |  |  
| Financial institution instruments¹ |  | — |  |  | 216 |  |  | — |  |  | 216 |  |  | — |  | 257 |  |  | — |  | 257 |  |  |  |  
| Government debt² |  | — |  |  | 154 |  |  | — |  |  | 154 |  |  | — |  | 415 |  |  | — |  | 415 |  |  |  |  
| Other long-term assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Derivative assets |  | — |  |  | 1,029 |  |  | 16 |  |  | 1,045 |  |  | — |  |  | 1,520 |  |  | 30 |  |  | 1,550 |  |  |  |  
| Loans receivable³ |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  | 157 |  |  | — |  | 157 |  |  |  |  
| Total assets measured and recorded at fair value |  | $ | 1,176 |  |  | $ | 27,384 |  |  | $ | 16 |  |  | $ | 28,576 |  |  | $ | 3,096 |  |  | $ | 27,131 |  |  | $ | 30 |  |  | $ | 30,257 |  |  |  |  
| Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Other accrued liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Derivative liabilities |  | $ | 5 |  |  | $ | 613 |  |  | $ | — |  |  | $ | 618 |  |  | $ | — |  |  | $ | 810 |  |  | $ | — |  |  | $ | 810 |  |  |  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Other long-term liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| Derivative liabilities |  | — |  |  | 4 |  |  | — |  |  | 4 |  |  | — |  |  | 5 |  |  | — |  |  | 5 |  |  |  |  
| Total liabilities measured and recorded at fair value |  | $ | 5 |  |  | $ | 617 |  |  | $ | — |  |  | $ | 622 |  |  | $ | — |  |  | $ | 815 |  |  | $ | — |  |  | $ | 815 |  |  |  | 
1Level 1 investments consist of money market funds. Level 2 investments consist primarily of commercial paper, certificates of deposit, time deposits, and notes and bonds issued by financial institutions.
 
2Level 2 investments consist primarily of U.S. agency notes and non-U.S. government debt.
 
3The fair value of our loans receivable for which we elected the fair value option did not significantly differ from the contractual principal balance.
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