Composition of Certain Financial Statement Items Investment and Other Income, Net (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 24, 2017 |
Sep. 25, 2016 |
Sep. 27, 2015 |
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| Investment Income, Net [Abstract] | |||
| Interest and dividend income | $ 619 | $ 611 | $ 527 |
| Net realized gains on marketable securities | 456 | 239 | 451 |
| Net realized gains on other investments | 74 | 49 | 49 |
| Impairment losses on marketable securities | (131) | (112) | (163) |
| Impairment losses on other investments | (46) | (60) | (37) |
| Net gains (losses) on derivative instruments | 32 | (8) | 17 |
| Equity in net losses of investees | (74) | (84) | (32) |
| Net losses on foreign currency transactions | (30) | 0 | 0 |
| Net gains on deconsolidation of subsidiaries | 0 | 0 | 3 |
| Investment and other income, net | $ 900 | 635 | 815 |
| Net impairment losses on marketable securities related to the noncredit portion of losses on debt securities recognized in other comprehensive income | 37 | $ 23 | |
| Ending balance of credit loss portion of other than temporary impairments on debt securities | $ 55 | ||
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of gain (loss) included in earnings for investments classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity. No definition available.
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- Definition This element represents the amount of loss recognized for other than temporary impairments (OTTI) of investments in debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before tax of other than temporary impairment (OTTI) on investment in available-for-sale debt security, recognized in other comprehensive loss. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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