Interim Condensed Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 27, 2020	Mar. 29, 2019	Mar. 27, 2020	Mar. 29, 2019
Statement of Comprehensive Income [Abstract]
Net income including controlling interest	$ 88,674	$ 73,575	$ 137,265	$ 171,933
Other comprehensive income:
Currency translation adjustments, net of tax expense/(benefit) of ($40), $0, $0, and $0	(10,191)	2,015	(6,571)	(1,713)
Unrealized gains/(losses) on investments, net of tax expense/(benefit) of $54, $84, ($207), and $124	273	2,098	(889)	2,868
Unrealized gains on cash flow hedges, net of tax of $37, $0, $0, and $0	(4,008)	0	(3,724)	0
Other Comprehensive Income (Loss), Net of Tax	(13,926)	4,113	(11,184)	1,155
Comprehensive income	74,748	77,688	126,081	173,088
Less: comprehensive (income) attributable to controlling interest	193	(292)	178	(280)
Comprehensive income attributable to Dolby Laboratories, Inc.	$ 74,941	$ 77,396	$ 126,259	$ 172,808