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Fair Value Measurement (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2022 | Jan. 01, 2022
Other income/expense |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Other Nonrecurring Gain |  | $ 30
Maximum [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Short Term Investment Maturity Period | 12 months |
Available For Sale Securities Debt Maturity Period | 47 years |

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- Definition Amount of gain that is infrequent in occurrence or unusual in nature. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233 + Details
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