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Acquisitions - Summary of Adjusted Purchase Price (Detail) $ in Millions	12 Months Ended
	Jun. 25, 2022 USD ($)
Business Acquisition [Line Items]
Allocation of stock based compensation replacement awards	$ 1.7

X

- Definition

Allocation of Stock Based Compensation Replacement Awards

+ References

No definition available.

+ Details

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Namespace Prefix:	syna_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration