Interim Condensed Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Stockholders' Equity - Dolby Laboratories, Inc.	Controlling Interest	Class A Common Stock [Member] Common Stock	Class A Common Stock [Member] Additional Paid-In Capital
Beginning balance (in shares) at Sep. 25, 2020		99,000
Beginning balance at Sep. 25, 2020	$ 2,438,405		$ 0	$ 2,443,138	$ (10,594)	$ 2,432,643	$ 5,762
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	142,690			135,198		135,198	7,492
Other comprehensive loss, net of tax	10,149				9,986	9,986	163
Distributions to controlling interest	(7,362)						7,362
Stock-based compensation expense	26,313		26,313			26,313
Shares repurchased (in shares)		0
Repurchase of common stock	(39,985)		(49,550)	9,565		(39,985)
Cash dividends declared and paid on common stock	(22,231)			(22,231)		(22,231)
Common stock issued under employee stock plans (in shares)								2,000
Common stock issued under employee stock plans	51,323		51,321			51,323
Tax withholdings on vesting of restricted stock (in shares)								(1,000)
Tax withholdings on vesting of restricted stock	(28,085)					(28,085)	0		$ (28,084)
Ending balance (in shares) at Dec. 25, 2020		100,000
Ending balance at Dec. 25, 2020	2,571,217		0	2,565,670	(608)	2,565,162	6,055
Beginning balance (in shares) at Sep. 24, 2021		100,000
Beginning balance at Sep. 24, 2021	2,604,232		0	2,607,909	(10,030)	2,597,979	6,253
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	80,010			80,014		80,014	(4)
Other comprehensive loss, net of tax	(1,538)				(1,491)	(1,491)	(47)
Distributions to controlling interest	(1,435)						(1,435)
Stock-based compensation expense	$ 32,656		32,656			32,656
Shares repurchased (in shares)	(408,508)	0
Repurchase of common stock	$ (35,573)		(22,108)	(13,465)		(35,573)
Cash dividends declared and paid on common stock	(25,283)			(25,283)		(25,283)
Common stock issued under employee stock plans	21,372	$ 0	21,372			21,372
Tax withholdings on vesting of restricted stock (in shares)								0
Tax withholdings on vesting of restricted stock	(31,920)				0	(31,920)	0		$ (31,920)
Ending balance (in shares) at Dec. 31, 2021		100,000
Ending balance at Dec. 31, 2021	$ 2,642,521		$ 0	$ 2,649,175	$ (11,521)	$ 2,637,754	$ 4,767