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Composition of Certain Financial Statement Items Investment and Other Income (Expense), Net (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 27, 2021 | Jun. 28, 2020 | Jun. 27, 2021 | Jun. 28, 2020
Investment Income, Net [Abstract] |  |  |  |
Interest and dividend income | $ 21 | $ 30 | $ 63 | $ 135
Net gains on marketable securities | 53 | 117 | 86 | 183
Net gains on other investments | 97 | 48 | 307 | 84
Net gains on deferred compensation plan assets | 38 | 57 | 115 | 16
Impairment losses on other investments | (7) | (12) | (24) | (349)
Net gains (losses) on derivative investments | 0 | 1 | (7) | 2
Equity in net earnings (losses) of investees | 1 | (6) | 12 | (21)
Net losses on foreign currency transactions | (3) | (6) | (29) | (4)
Investment and other income, net | $ 200 | $ 229 | $ 523 | $ 46

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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121605123&loc=d3e30226-110892 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=120253306&loc=d3e28228-110885 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 + Details
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