Interim Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Revenue:
Revenue	$ 338,258	$ 299,722	$ 640,634	$ 599,249
Total revenue	338,258	299,722	640,634	599,249
Cost of revenue:
Total cost of revenue	36,575	31,027	75,204	61,920
Gross margin	301,683	268,695	565,430	537,329
Operating expenses:
Research and development	58,625	59,493	117,272	115,937
Sales and marketing	92,694	74,019	178,296	144,168
General and administrative	47,416	50,747	98,229	99,032
Restructuring charges/(credits)	18	(167)	32	(364)
Total operating expenses	198,753	184,092	393,829	358,773
Operating income	102,930	84,603	171,601	178,556
Other income/expense:
Interest income	7,494	3,892	12,679	7,673
Interest expense	(32)	(29)	(77)	(64)
Other income/(expense), net	(390)	(684)	53	(1,836)
Total other income	7,072	3,179	12,655	5,773
Income before income taxes	110,002	87,782	184,256	184,329
Provision for income taxes	(36,427)	(22,432)	(12,323)	(172,137)
Net income including controlling interest	73,575	65,350	171,933	12,192
Less: net (income) attributable to controlling interest	(135)	(134)	(274)	(278)
Net income attributable to Dolby Laboratories, Inc.	$ 73,440	$ 65,216	$ 171,659	$ 11,914
Net income per share:
Basic (in usd per share)	$ 0.72	$ 0.63	$ 1.68	$ 0.12
Diluted (in usd per share)	$ 0.70	$ 0.61	$ 1.63	$ 0.11
Weighted-average shares outstanding:
Basic (in shares)	102,141	103,771	102,409	103,162
Diluted (in shares)	104,587	107,001	105,529	106,805
Related party rent expense:
Included in operating expenses	$ 768	$ 784	$ 1,648	$ 1,568
Included in net income attributable to controlling interest	$ 176	$ 179	$ 352	$ 356
Common stock, dividends declared (in dollars per share)	$ 0.19	$ 0.16	$ 0.38	$ 0.32
Common Stock, Dividends, Per Share, Cash Paid	$ 0.19	$ 0.16	$ 0.38	$ 0.32
Licensing
Revenue:
Revenue	$ 310,308	$ 272,135	$ 570,587	$ 542,307
Cost of revenue:
Cost of revenue	16,074	10,610	27,471	19,869
Products and services
Revenue:
Revenue	27,950	27,587	70,047	56,942
Cost of revenue:
Cost of revenue	$ 20,501	$ 20,417	$ 47,733	$ 42,051