Selected Quarterly Financial Information - Summary of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ 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
Selected Quarterly Financial Information [Abstract]
Net sales	$ 46,852	$ 42,358	$ 50,557	$ 75,872	$ 51,501	$ 49,605	$ 58,010	$ 74,599	$ 215,639	$ 233,715	$ 182,795
Gross margin	17,813	16,106	19,921	30,423	20,548	19,681	23,656	29,741	84,263	93,626	70,537
Net income	$ 9,014	$ 7,796	$ 10,516	$ 18,361	$ 11,124	$ 10,677	$ 13,569	$ 18,024	$ 45,687	$ 53,394	$ 39,510
Earnings per share:
Basic (in dollars per share)	$ 1.68	$ 1.43	$ 1.91	$ 3.30	$ 1.97	$ 1.86	$ 2.34	$ 3.08	$ 8.35	$ 9.28	$ 6.49
Diluted (in dollars per share)	$ 1.67	$ 1.42	$ 1.90	$ 3.28	$ 1.96	$ 1.85	$ 2.33	$ 3.06	$ 8.31	$ 9.22	$ 6.45