Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income including controlling interest	$ 255,505	$ 42,305	$ 207,106
Other comprehensive income/(loss):
Foreign currency translation adjustments, net of tax	(10,166)	(5,578)	3,653
Unrealized gains/(losses) on available-for-sale securities, net of tax	5,146	(2,571)	(1,119)
Other Comprehensive Income (Loss), Net of Tax	(5,020)	(8,149)	2,534
Comprehensive income	250,485	34,156	209,640
Less: comprehensive (income) attributable to controlling interest	(127)	(489)	(715)
Comprehensive income attributable to Dolby Laboratories, Inc.	$ 250,358	$ 33,667	$ 208,925