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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 30, 2023
Feb. 16, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K/A    
Amendment Flag true    
Amendment Description Garmin Ltd. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended December 30, 2023 (the “Original Report”), as filed with the Securities and Exchange Commission (the “SEC”) on February 21, 2024, in order to amend “Item 13. Certain Relationships and Related Transactions, and Director Independence.” The revisions to “Item 13. Certain Relationships and Related Transactions, and Director Independence” are solely to disclose related party transactions that were erroneously omitted from the Original Report and certain other disclosures related thereto. The disclosures were originally incorporated by reference to the Company’s proxy statement, which was filed with the SEC on April 24, 2024 (the “Proxy Statement”). Correspondingly, “Item 15. Exhibits and Financial Statement Schedules” has been restated to include the required certifications by the Company’s principal executive officer and principal financial officer, which are included as Exhibits 31.3 and 31.4, respectively.Paragraphs 3, 4 and 5 of Exhibit 31.3 and 31.4 have been omitted in accordance with the SEC’s rules and guidance. Additionally, this Amendment No. 1 does not include the certifications under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment No. 1. Except as described above, this Amendment No. 1 does not modify or update disclosure in, or exhibits to, the Original Report. Furthermore, this Amendment No. 1 does not change any previously reported financial results, nor does it reflect events occurring after the date of the Original Report. Information not affected by this Amendment No. 1 remains unchanged and reflects the disclosures made at the time the Original Report was made. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Report and the Company’s other filings with the SEC.    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 30, 2023    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023    
Current Fiscal Year End Date --12-28    
Entity File Number 001-41118    
Entity Registrant Name GARMIN LTD    
Entity Central Index Key 0001121788    
Entity Tax Identification Number 98-0229227    
Entity Incorporation, State or Country Code V8    
Entity Address, Address Line1 Mühlentalstrasse 2    
Entity Address, City or Town Schaffhausen    
Entity Address, Country CH    
Entity Address, Postal Zip Code 8200    
City Area Code 41 52    
Local Phone Number 630 1600    
Title of 12(b) Security Registered Shares, $0.10 Per Share Par Value    
Trading Symbol GRMN    
Security Exchange Name NYSE    
Entity's Reporting Status Current Yes    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Common Stock, Shares Outstanding   191,777,417  
Entity Public Float     $ 15,973,000,000