v3.25.4

Fair value of financial instruments - Narrative (Details) $ in Millions, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 26, 2025 USD ($) contract	Dec. 27, 2024 USD ($)	Dec. 26, 2025 USD ($) contract	Dec. 27, 2024 USD ($)	Jun. 27, 2025 USD ($) contract	Dec. 26, 2025 CAD ($) contract	Jun. 27, 2025 CAD ($) contract
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ 1.2	$ (5.1)	$ (0.1)	$ (1.0)
Foreign currency forward contracts
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative liabilities, notional amount	$ 11.0		11.0		$ 35.0
Gain/(loss) from accumulated other comprehensive income expected to be reclassified			$ 4.3		$ 1.5
Foreign currency forward contracts \| Designated as hedging instrument \| Thailand, baht
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	200		200		165	200	165
Derivative, notional amount	$ 200.0		$ 200.0		$ 165.0
Foreign currency forward contracts \| Designated as hedging instrument \| Canada, dollars
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	1		1		1	1	1
Derivative liabilities, notional amount						$ 0.4	$ 0.5

The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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Nominal or face amount used to calculate payments on the derivative liability.

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Nominal or face amount used to calculate payment on derivative.

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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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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Fabrinet 10-Q