XML 38 R28.htm IDEA: XBRL DOCUMENT
v3.22.2

Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 26, 2021 | Jun. 26, 2021
Accounting Policies [Abstract] |  |
Reclassification from research and development expense to selling, general and administrative expense | $ 14,958 | $ 29,323

X
- Definition Reclassification from research and development expense to selling, general and administrative expense. + References No definition available. + Details
Name: | grmn_ReclassificationFromResearchAndDevelopmentExpenseToSellingGeneralAndAdministrativeExpense
Namespace Prefix: | grmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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