Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Mar. 30, 2012	Apr. 01, 2011
Revenue:
Licensing	$ 225,349	$ 214,627	$ 424,973	$ 402,803
Products	27,228	26,347	53,628	72,374
Services	7,682	9,052	15,036	17,561
Total revenue	260,259	250,026	493,637	492,738
Cost of revenue:
Cost of licensing	3,303	5,771	6,631	9,732
Cost of products	17,635	20,031	31,523	42,229
Cost of services	2,654	2,655	5,848	5,635
Total cost of revenue	23,592	28,457	44,002	57,596
Gross margin	236,667	221,569	449,635	435,142
Operating expenses:
Research and development	34,236	28,399	67,062	56,726
Sales and marketing	43,194	37,545	86,210	75,762
General and administrative	37,281	35,155	72,746	72,197
Restructuring charges, net	910	0	1,278	785
Total operating expenses	115,621	101,099	227,296	205,470
Operating income	121,046	120,470	222,339	229,672
Interest income	1,414	1,953	3,151	3,567
Interest expense	(5)	(85)	(31)	(368)
Other income, net	60	156	260	689
Income before provision for income taxes	122,515	122,494	225,719	233,560
Provision for income taxes	(34,198)	(40,012)	(64,036)	(64,313)
Net income including controlling interest	88,317	82,482	161,683	169,247
Less: net income attributable to controlling interest	(197)	(421)	(404)	(799)
Net Income Attributable to Dolby Laboratories, Inc.	88,120	82,061	161,279	168,448
Earnings per share attributable to Dolby Laboratories, Inc.:
Basic	$ 0.81	$ 0.73	$ 1.48	$ 1.50
Diluted	$ 0.81	$ 0.72	$ 1.48	$ 1.48
Weighted-average shares outstanding:
Basic	108,415	112,140	108,650	112,086
Diluted	109,170	113,346	109,242	113,535
Related party rent expense included in general and administrative expenses	$ 343	$ 343	$ 686	$ 686