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Revenue - Schedule of Deferred Revenue and Costs (Details) $ in Thousands | 9 Months Ended
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Sep. 24, 2022 USD ($)
Revenue from Contract with Customer [Abstract] |  |
Deferred Revenue, Balance, beginning of period | $ 129,272 | [1]
Deferred Revenue, Deferrals in period | 183,907 | [1]
Deferred Revenue, Recognition of deferrals in period | (187,548) | [1]
Deferred Revenue, Balance, end of period | 125,631 | [1]
Deferred costs, Balance, beginning of period | 28,322 | [2]
Deferred Costs, Deferrals in period | 12,307 | [2]
Deferred Costs, Recognition of deferrals in period | (15,838) | [2]
Deferred Costs, Balance, end of period | $ 24,791 | [2]
[1] | Deferred revenue is comprised of both deferred revenue and noncurrent deferred revenue per the condensed consolidated balance sheets
[2] | Deferred costs are comprised of both deferred costs and noncurrent deferred costs per the condensed consolidated balance sheets

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- Definition Amount refer to contract with customer liability additions. + References No definition available. + Details
Name: | grmn_ContractWithCustomerLiabilityAdditions
Namespace Prefix: | grmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract with customer liability revenue recognized including additions. + References No definition available. + Details
Name: | grmn_ContractWithCustomerLiabilityRevenueRecognizedIncludingAdditions
Namespace Prefix: | grmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of deferred costs additions. + References No definition available. + Details
Name: | grmn_DeferredCostsAddition
Namespace Prefix: | grmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of deferred costs recognized. + References No definition available. + Details
Name: | grmn_DeferredCostsRecognized1
Namespace Prefix: | grmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The carrying amount of deferred costs. + References No definition available. + Details
Name: | us-gaap_DeferredCostsCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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