Segment Information and Geographic Data - Summary Information by Operating Segment (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Segment Reporting Information [Line Items]
Net sales	$ 46,852	$ 42,358	$ 50,557	$ 75,872	$ 51,501	$ 49,605	$ 58,010	$ 74,599	$ 215,639	$ 233,715	$ 182,795
Operating income									60,024	71,230	52,503
Americas
Segment Reporting Information [Line Items]
Net sales									86,613	93,864	80,095
Operating income									28,172	31,186	26,158
Europe
Segment Reporting Information [Line Items]
Net sales									49,952	50,337	44,285
Operating income									15,348	16,527	14,434
Greater China
Segment Reporting Information [Line Items]
Net sales									48,492	58,715	31,853
Operating income									18,835	23,002	11,039
Japan
Segment Reporting Information [Line Items]
Net sales									16,928	15,706	15,314
Operating income									7,165	7,617	6,904
Rest of Asia Pacific
Segment Reporting Information [Line Items]
Net sales									13,654	15,093	11,248
Operating income									$ 4,781	$ 5,518	$ 3,674