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Summary Information by Operating Segment (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 26, 2015 | Dec. 27, 2014
Segment Reporting Information [Line Items] |  |
Net sales | $ 75,872 | $ 74,599
Operating income | 24,171 | 24,246
Americas |  |
Segment Reporting Information [Line Items] |  |
Net sales | 29,325 | 30,566
Operating income | 10,018 | 10,701
Europe |  |
Segment Reporting Information [Line Items] |  |
Net sales | 17,932 | 17,214
Operating income | 5,779 | 5,882
Greater China |  |
Segment Reporting Information [Line Items] |  |
Net sales | 18,373 | 16,144
Operating income | 7,576 | 6,366
Japan |  |
Segment Reporting Information [Line Items] |  |
Net sales | 4,794 | 5,448
Operating income | 2,240 | 2,488
Rest of Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Net sales | 5,448 | 5,227
Operating income | $ 2,032 | $ 1,849

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