Interim Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Revenue:
Revenue	$ 302,159	$ 214,780	$ 942,793	$ 814,029
Total revenue	302,159	214,780	942,793	814,029
Cost of revenue:
Total cost of revenue	39,690	34,383	114,894	96,303
Gross margin	262,469	180,397	827,899	717,726
Operating expenses:
Research and development	60,408	60,357	177,680	176,294
Sales and marketing	83,390	79,834	261,686	224,002
General and administrative	54,183	47,893	152,412	146,925
Restructuring charges/(credits)	30,232	(82)	30,264	(446)
Total operating expenses	228,213	188,002	622,042	546,775
Operating income	34,256	(7,605)	205,857	170,951
Other income/expense:
Interest income	6,551	5,487	19,230	13,160
Interest expense	(29)	(87)	(106)	(151)
Other income/(expense), net	1,022	(3,603)	1,075	(5,439)
Total other income	7,544	1,797	20,199	7,570
Income before income taxes	41,800	(5,808)	226,056	178,521
Provision for income taxes	(2,163)	9,067	(14,486)	(163,070)
Net income including controlling interest	39,637	3,259	211,570	15,451
Less: net (income) attributable to controlling interest	(63)	(143)	(337)	(421)
Net income attributable to Dolby Laboratories, Inc.	$ 39,574	$ 3,116	$ 211,233	$ 15,030
Net income per share:
Basic (in usd per share)	$ 0.39	$ 0.03	$ 2.07	$ 0.15
Diluted (in usd per share)	$ 0.38	$ 0.03	$ 2.01	$ 0.14
Weighted-average shares outstanding:
Basic (in shares)	101,218	103,836	102,012	103,386
Diluted (in shares)	103,717	106,950	105,025	106,943
Related party rent expense:
Included in operating expenses	$ 13,107	$ 1,017	$ 14,755	$ 2,585
Included in net income attributable to controlling interest	$ 111	$ 179	$ 463	$ 535
Common stock, dividends declared (in dollars per share)	$ 0.19	$ 0.16	$ 0.57	$ 0.48
Common Stock, Dividends, Per Share, Cash Paid	$ 0.19	$ 0.16	$ 0.57	$ 0.48
Licensing
Revenue:
Revenue	$ 271,897	$ 183,771	$ 842,484	$ 726,078
Cost of revenue:
Cost of revenue	13,290	12,111	40,761	31,980
Products and services
Revenue:
Revenue	30,262	31,009	100,309	87,951
Cost of revenue:
Cost of revenue	$ 26,400	$ 22,272	$ 74,133	$ 64,323