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- Definition The component of income tax expense for the period representing the net change in the entity's deferred tax assets and liabilities pertaining to continuing operations, net of foreign currency exchange impact. + Details Name: grmn_DeferredIncomeTaxes Namespace Prefix: grmn Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_AdjustmentForAmortization Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_CashAcquiredFromAcquisition Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_CashAndCashEquivalentsAtCarryingValue Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: instant

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- Details Name: us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease Namespace Prefix: us-gaap Data Type: monetary Balance Type: na Period Type: duration

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- Details Name: us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_Depreciation Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_FairValueOfAssetsAcquired Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ForeignCurrencyTransactionGainLossUnrealized Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_GainLossOnSaleOfInvestments Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_GainLossOnSaleOfPropertyPlantEquipment Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncomeTaxesPaid Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInAccountsPayable Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInAccountsReceivable Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInDeferredRevenue Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInInventories Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInOperatingCapitalAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInOtherOperatingAssets Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInOtherOperatingLiabilities Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_IncreaseDecreaseInRestrictedCash Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_InterestPaid Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_InventoryWriteDown Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_LiabilitiesAssumed Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInFinancingActivities Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInInvestingActivities Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInOperatingActivities Namespace Prefix: us-gaap Data Type: monetary Balance Type: na Period Type: duration

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- Details Name: us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease Namespace Prefix: us-gaap Data Type: monetary Balance Type: na Period Type: duration

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- Details Name: us-gaap_PaymentsForRepurchaseOfCommonStock Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_PaymentsOfDividends Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquiredAbstract Namespace Prefix: us-gaap Data Type: string Balance Type: na Period Type: duration

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- Details Name: us-gaap_PaymentsToAcquireIntangibleAssets Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_PaymentsToAcquireMarketableSecurities Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_ProceedsFromIncomeTaxRefunds Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_ProfitLoss Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_ProvisionForDoubtfulAccounts Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration

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- Details Name: us-gaap_RepaymentsOfLongTermDebt Namespace Prefix: us-gaap Data Type: monetary Balance Type: credit Period Type: duration

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- Details Name: us-gaap_StockOptionPlanExpense Namespace Prefix: us-gaap Data Type: monetary Balance Type: debit Period Type: duration