CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Income Statement [Abstract]
Net sales	$ 61,137	$ 52,896	$ 149,430	$ 131,247
Cost of sales	37,715	32,305	92,096	80,480
Gross margin	23,422	20,591	57,334	50,767
Operating expenses:
Research and development	3,378	2,776	6,785	5,647
Selling, general and administrative	4,150	3,718	8,381	7,664
Total operating expenses	7,528	6,494	15,166	13,311
Operating income	15,894	14,097	42,168	37,456
Other income/(expense), net	274	587	1,030	1,408
Income before provision for income taxes	16,168	14,684	43,198	38,864
Provision for income taxes	2,346	3,655	9,311	9,944
Net income	$ 13,822	$ 11,029	$ 33,887	$ 28,920
Earnings per share:
Basic (in dollars per share)	$ 2.75	$ 2.11	$ 6.69	$ 5.50
Diluted (in dollars per share)	$ 2.73	$ 2.10	$ 6.63	$ 5.46
Shares used in computing earnings per share:
Basic (in shares)	5,024,877	5,225,791	5,068,877	5,262,226
Diluted (in shares)	5,068,493	5,261,688	5,113,140	5,294,841
Cash dividends declared per share (in dollars per share)	$ 0.63	$ 0.57	$ 1.26	$ 1.14