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Interim Condensed Consolidated Statements Of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Dec. 29, 2023	Dec. 30, 2022
Related party rent expense:
Included in net income attributable to noncontrolling interest	$ 71	$ 71

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- Definition

Costs and Expenses, Related Party Attributable to Controlling Interest

+ References

No definition available.

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- Definition

Related Party Transactions, Rent Expense [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	dlb_
Data Type:	xbrli:stringItemType
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Period Type:	duration