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Income Taxes - Additional Information (Details) $ in Millions, € in Billions |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 30, 2016 EUR (€) Subsidiary | Sep. 30, 2017 USD ($) | Sep. 24, 2016 USD ($) | Sep. 26, 2015 USD ($) | Sep. 27, 2014 USD ($)
Income Tax Disclosure [Abstract] |  |  |  |  |
Foreign pre-tax earnings |  | $ 44,700 | $ 41,100 | $ 47,600 |
Statutory tax rate in foreign operations |  | 12.50% |  |  |
Undistributed earnings of foreign subsidiaries |  | $ 128,700 |  |  |
Deferred tax liability related to foreign earnings that may be repatriated |  | 42,200 |  |  |
Cash, cash equivalents and marketable securities held by foreign subsidiaries |  | $ 252,300 | $ 216,000 |  |
Reconciliation of provision for income taxes, statutory federal income tax rate |  | 35.00% | 35.00% | 35.00% |
Net excess tax benefits from equity awards |  | $ 620 | $ 379 | $ 748 |
Measurement of tax position, minimum likelihood of tax benefits being realized upon ultimate settlement, percentage |  | 50.00% |  |  |
Gross unrecognized tax benefits |  | $ 8,407 | 7,724 | 6,900 | $ 4,033
Gross unrecognized tax benefits that would affect effective tax rate, if recognized |  | 2,500 | 2,800 |  |
Unrecognized tax benefits, gross interest and penalties accrued |  | 1,200 | 1,000 |  |
Tax matters, recognized interest and penalty expense |  | $ 165 | $ 295 | $ 709 |
Unfavorable investigation outcome, EU State Aid rules |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of subsidiaries impacted by the European Commission tax ruling | Subsidiary | 2 |  |  |  |
Maximum potential loss related to European Commission tax ruling | € | € 13 |  |  |  |
Unfavorable investigation outcome, EU State Aid rules - interest component |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Maximum potential loss related to European Commission tax ruling | € | € 1 |  |  |  |

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- Definition Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP), including transfer pricing adjustments. The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits). + References No definition available. + Details
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- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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