Interim Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 26, 2021	Mar. 27, 2020	Mar. 26, 2021	Mar. 27, 2020
Revenue:
Revenue	$ 319,558	$ 351,815	$ 709,432	$ 643,692
Total revenue	319,558	351,815	709,432	643,692
Cost of revenue:
Total cost of revenue	32,378	36,830	67,682	74,145
Gross margin	287,180	314,985	641,750	569,547
Operating expenses:
Research and development	65,808	60,086	129,580	117,736
Sales and marketing	78,046	88,485	153,491	183,603
General and administrative	59,398	60,800	113,852	113,329
Gain on sale of assets	0	0	(13,871)	0
Restructuring charges/(credits)	741	(331)	10,764	344
Total operating expenses	203,993	209,040	393,816	415,012
Operating income	83,187	105,945	247,934	154,535
Other income/(expense):
Interest income	962	4,721	1,936	9,653
Interest expense	(167)	(25)	(252)	(97)
Other income, net	1,385	138	2,711	1,142
Total other income	2,180	4,834	4,395	10,698
Income before income taxes	85,367	110,779	252,329	165,233
Provision for income taxes	(9,022)	(22,105)	(33,294)	(27,968)
Net income including controlling interest	76,345	88,674	219,035	137,265
Less: net income attributable to controlling interest	(128)	(178)	(7,620)	(16)
Net income attributable to Dolby Laboratories, Inc.	$ 76,217	$ 88,496	$ 211,415	$ 137,249
Net income per share:
Basic (in usd per share)	$ 0.75	$ 0.88	$ 2.09	$ 1.36
Diluted (in usd per share)	$ 0.73	$ 0.86	$ 2.02	$ 1.33
Weighted-average shares outstanding:
Basic (in shares)	101,464	100,854	101,090	100,595
Diluted (in shares)	104,581	102,773	104,414	103,133
Related party rent expense:
Included in operating expenses	$ (403)	$ 78	$ (387)	$ 148
Included in net income attributable to controlling interest	$ 121	$ 327	$ 240	$ 221
Common stock, dividends declared (in dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.44
Common Stock, Dividends, Per Share, Cash Paid	$ 0.22	$ 0.22	$ 0.44	$ 0.44
Licensing
Revenue:
Revenue	$ 303,585	$ 328,865	$ 676,590	$ 586,548
Cost of revenue:
Cost of revenue	16,060	13,243	29,006	25,585
Products and services
Revenue:
Revenue	15,973	22,950	32,842	57,144
Cost of revenue:
Cost of revenue	$ 16,318	$ 23,587	$ 38,676	$ 48,560