v3.21.1

Other receivable - Additional Information (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Mar. 26, 2021 | Jun. 26, 2020 | Oct. 01, 2019
Receivables [Abstract] |  |  |
Other receivable | $ 24,310 | $ 24,310 | $ 24,300
Other receivable provided to customer | $ 24,300 |  |

X
- Definition Payments for other receivable provided to customer. + References No definition available. + Details
Name: | fn_PaymentsForOtherReceivableProvidedToCustomer
Namespace Prefix: | fn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_OtherReceivablesNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration