XML 46 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1

Warranty Reserves (Details Narrative)	3 Months Ended
	Mar. 31, 2018
Minimum [Member]
Product warranty term	1 year
Maximum [Member]
Product warranty term	3 years

X

- Definition

Refers to product warrant term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	grmn_ProductWarrantyTerm
Namespace Prefix:	grmn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: