Goodwill and Acquired Intangible Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 27, 2026	Jun. 28, 2025	Jun. 29, 2024
Intangible Asset, Finite-Lived [Line Items]
Intangible asset impairment charges	$ 6.8	$ 13.8	$ 16.0
Location, Statement of Income, Balance: syna:AmortizationOfIntangibleAssetsIncludedInOperatingExpense
Intangible Asset, Finite-Lived [Line Items]
Acquired intangibles amortization	$ 119.0	$ 114.2	$ 81.6

Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

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+ Details

- 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.

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