Interim Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017
Revenue:
Licensing	$ 273,143	$ 241,617	$ 531,159	$ 474,316
Products	22,665	20,713	47,598	48,924
Services	5,547	5,144	10,395	10,501
Total revenue	301,355	267,474	589,152	533,741
Cost of revenue:
Cost of licensing	10,610	8,796	19,869	16,917
Cost of products	15,603	13,988	32,638	31,708
Cost of services	4,746	4,193	9,328	8,319
Total cost of revenue	30,959	26,977	61,835	56,944
Gross margin	270,396	240,497	527,317	476,797
Operating expenses:
Research and development	59,493	58,341	115,937	115,859
Sales and marketing	74,019	75,620	144,168	146,795
General and administrative	50,747	43,253	99,032	84,793
Restructuring charges/(credits)	(167)	0	(364)	0
Total operating expenses	184,092	177,214	358,773	347,447
Operating income	86,304	63,283	168,544	129,350
Other income/expense:
Interest income	3,892	2,186	7,673	4,000
Interest expense	(29)	(37)	(64)	(63)
Other income/(expense), net	(684)	762	(1,836)	563
Total other income	3,179	2,911	5,773	4,500
Income before income taxes	89,483	66,194	174,317	133,850
Provision for income taxes	(18,718)	(15,467)	(185,030)	(29,549)
Net income/(loss) including controlling interest	70,765	50,727	(10,713)	104,301
Less: net (income) attributable to controlling interest	(134)	(137)	(278)	(337)
Net income/(loss) attributable to Dolby Laboratories, Inc.	$ 70,631	$ 50,590	$ (10,991)	$ 103,964
Net income/(loss) per share:
Basic (in usd per share)	$ 0.68	$ 0.50	$ (0.11)	$ 1.02
Diluted (in usd per share)	$ 0.66	$ 0.49	$ (0.11)	$ 1.00
Weighted-average shares outstanding:
Basic (in shares)	103,771	101,787	103,162	101,635
Diluted (in shares)	107,001	103,883	103,162	103,867
Related party rent expense:
Included in operating expenses	$ 784	$ 793	$ 1,568	$ 1,575
Included in net income attributable to controlling interest	$ 179	$ 175	$ 356	$ 350
Common stock, dividends declared (in dollars per share)	$ 0.16	$ 0.14	$ 0.32	$ 0.28
Common Stock, Dividends, Per Share, Cash Paid	$ 0.16	$ 0.14	$ 0.32	$ 0.28