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v3.25.1

Fair Value Measurements (Schedule Of Available For Sale Securities) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Mar. 29, 2025 | Sep. 28, 2024
Maximum [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available For Sale Securities Debt Maturity Period | 45 years |
Short Term Investment Maturity Period | 12 months |
Other Current Assets [Member] | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Current |  | $ 10
Other Current Assets [Member] | Level 1 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Current |  | 0
Other Current Assets [Member] | Level 2 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Current |  | 10
Other Current Assets [Member] | Level 3 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Current |  | 0
Other Assets [Member] | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Noncurrent | $ 114 | 103
Other Assets [Member] | Level 1 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Noncurrent | 0 | 0
Other Assets [Member] | Level 2 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Noncurrent | 89 | 75
Other Assets [Member] | Level 3 | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-Sale, Noncurrent | 25 | 28
U.S. treasury and agency |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax | (2) | (1)
Debt Securities, Available-for-sale | 89 | 85
Debt Securities, Available-for-Sale, Amortized Cost, Total | 91 | 86
Corporate and asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax | 0 | 0
Debt Securities, Available-for-sale | 25 | 28
Debt Securities, Available-for-Sale, Amortized Cost, Total | $ 25 | $ 28

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