v2.4.1.9
Segment Information (Net Sales and Property and Equipment Net by Geographic Area) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Dec. 27, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales to external customers $ 585,394us-gaap_SalesRevenueNet $ 583,221us-gaap_SalesRevenueNet  
Property and equipment, net 436,104us-gaap_PropertyPlantAndEquipmentNet 417,164us-gaap_PropertyPlantAndEquipmentNet 430,887us-gaap_PropertyPlantAndEquipmentNet
Americas      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales to external customers 305,261us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AmericasMember
304,808us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AmericasMember
 
Property and equipment, net 276,605us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AmericasMember
243,726us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AmericasMember
 
Asia Pacific      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales to external customers 71,782us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AsiaPacificMember
57,810us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AsiaPacificMember
 
Property and equipment, net 111,544us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AsiaPacificMember
119,850us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= us-gaap_AsiaPacificMember
 
Europe, Middle East and Africa      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Net sales to external customers 208,351us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= grmn_EuropeMiddleEastAndAfricaMember
220,603us-gaap_SalesRevenueNet
/ grmn_RegionReportingInformationByRegionAxis
= grmn_EuropeMiddleEastAndAfricaMember
 
Property and equipment, net $ 47,955us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= grmn_EuropeMiddleEastAndAfricaMember
$ 53,588us-gaap_PropertyPlantAndEquipmentNet
/ grmn_RegionReportingInformationByRegionAxis
= grmn_EuropeMiddleEastAndAfricaMember