CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Income Statement [Abstract]
Net sales	$ 265,595	$ 229,234	$ 215,639
Cost of sales	163,756	141,048	131,376
Gross margin	101,839	88,186	84,263
Operating expenses:
Research and development	14,236	11,581	10,045
Selling, general and administrative	16,705	15,261	14,194
Total operating expenses	30,941	26,842	24,239
Operating income	70,898	61,344	60,024
Other income/(expense), net	2,005	2,745	1,348
Income before provision for income taxes	72,903	64,089	61,372
Provision for income taxes	13,372	15,738	15,685
Net income	$ 59,531	$ 48,351	$ 45,687
Earnings per share:
Basic (in dollars per share)	$ 12.01	$ 9.27	$ 8.35
Diluted (in dollars per share)	$ 11.91	$ 9.21	$ 8.31
Shares used in computing earnings per share:
Basic (in shares)	4,955,377	5,217,242	5,470,820
Diluted (in shares)	5,000,109	5,251,692	5,500,281