Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Revenue:
Licensing	$ 878,844	$ 807,081	$ 801,313
Products	59,219	80,603	103,388
Services	22,113	21,990	28,313
Total revenue	960,176	909,674	933,014
Cost of revenue:
Cost of licensing	10,814	16,856	12,924
Cost of products	45,132	64,270	66,325
Cost of services	14,230	15,593	12,778
Total cost of revenue	70,176	96,719	92,027
Gross margin	890,000	812,955	840,987
Operating expenses:
Research and development	183,128	168,746	140,143
Sales and marketing	252,647	231,103	188,486
General and administrative	178,104	161,970	149,175
Restructuring charges	2,403	5,874	1,191
Total operating expenses	616,282	567,693	478,995
Operating income	273,718	245,262	361,992
Other income/expense:
Interest income	3,344	3,848	6,411
Interest expense	183	(575)	(196)
Other income/(expense), net	(1,146)	2,111	784
Total other income/expense	2,381	5,384	6,999
Income before income taxes	276,099	250,646	368,991
Provision for income taxes	(67,379)	(60,344)	(103,857)
Net income including controlling interest	208,720	190,302	265,134
Less: net (income) attributable to controlling interest	(2,617)	(1,031)	(832)
Net income attributable to Dolby Laboratories, Inc.	206,103	189,271	264,302
Net Income Per Share:
Basic (usd per share)	$ 2.02	$ 1.86	$ 2.47
Diluted (usd per share)	$ 1.99	$ 1.84	$ 2.46
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (shares)	102,151	101,879	106,926
Diluted (shares)	103,632	102,788	107,541
Related party rent expense:
Included in operating expenses	2,125	2,526	1,372
Included in net income attributable to controlling interest	$ 4,827	$ 3,636	$ 3,270