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INCOME TAXES - Uncertain tax positions (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 27, 2025 | Dec. 28, 2024 | Dec. 30, 2023
Reconciliation of the beginning and ending amount of unrecognized tax benefits related to uncertain tax positions |  |  |
Balance at the beginning of the year | $ 13 | $ 7 |
Changes in balances related to tax positions taken during current period | 7 | 6 | $ 7
Foreign currency adjustments | 2 |  |
Balance at the end of the year | $ 22 | $ 13 | $ 7

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- Definition Amount of uncertain tax positions. + References No definition available. + Details
Name: | mbly_UncertainTaxPositions
Namespace Prefix: | mbly_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns. + References No definition available. + Details
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Namespace Prefix: | mbly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of increase in unrecognized tax benefits resulting from foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-15A + Details
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