v3.26.1
Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 27, 2025
Mar. 28, 2026
Sep. 27, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Collateral, Right to Reclaim Cash, Offset   $ 56 $ 187
Other income/expense | Corporate and Other [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Asset Impairment Charges $ 75    
Fair Value, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Netting   (9) (21)
Total assets   748 737
Derivative Liability, Netting   (65) (208)
Total liabilities   13 9
Fair Value, Recurring [Member] | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   17 21
Total liabilities   0 0
Fair Value, Recurring [Member] | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   710 710
Total liabilities   78 217
Fair Value, Recurring [Member] | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total assets   30 27
Total liabilities   0 0
Other Current Assets [Member] | Fair Value, Recurring [Member] | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Netting   (2) (1)
Derivative Asset, Subject to Master Netting Arrangement, after Offset   26 5
Other Current Assets [Member] | Fair Value, Recurring [Member] | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Netting   (7) (20)
Derivative Asset, Subject to Master Netting Arrangement, after Offset   86 93
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 1 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   0 0
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 1 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   0 0
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 2 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   28 6
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 2 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   93 113
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 3 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   0 0
Other Current Assets [Member] | Fair Value, Recurring [Member] | Level 3 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term Investments   0 0
Other Assets [Member] | Fair Value, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Deferred compensation assets   518 522
Debt Securities, Available-for-Sale, Noncurrent   118 117
Other Assets [Member] | Fair Value, Recurring [Member] | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Deferred compensation assets   17 21
Debt Securities, Available-for-Sale, Noncurrent   0 0
Other Assets [Member] | Fair Value, Recurring [Member] | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Deferred compensation assets   501 501
Debt Securities, Available-for-Sale, Noncurrent   88 90
Other Assets [Member] | Fair Value, Recurring [Member] | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Deferred compensation assets   0 0
Debt Securities, Available-for-Sale, Noncurrent   30 27
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, after Offset   0 0
Derivative Liability, Netting   (15) (82)
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, after Offset   13 9
Derivative Liability, Netting   (50) (126)
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 1 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   0 0
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 1 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   0 0
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 2 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   15 82
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 2 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   63 135
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 3 | Designated as hedges      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   0 0
Other Current Liabilities [Member] | Fair Value, Recurring [Member] | Level 3 | Undesignated      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Subject to Master Netting Arrangement, before Offset   $ 0 $ 0