XML 81 R63.htm IDEA: XBRL DOCUMENT v3.8.0.1

Stock Compensation Plans (Details Narrative) - shares	1 Months Ended				12 Months Ended
	Jun. 30, 2011	Jun. 30, 2005	Oct. 31, 2001	Oct. 31, 2000	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015	Dec. 30, 2014	Dec. 26, 2011	Dec. 28, 2013	Dec. 26, 2009
Restricted Stock Units [Member]
Number of shares granted (in shares)					1,055,000	1,241,000	1,184,000
Outstanding awards weighted-average remaining contract life					1 year 3 months 14 days
Stock Option & Stock Appreciation Rights [Member]
Outstanding awards weighted-average remaining contract life					2 years 4 months 10 days
Exercisable awards weighted-average remaining contract life					2 years 18 days
2011 Non-employee Directors' Equity Incentive Plan [Member]
Maximum number of authorized shares available for issuance (in shares)	122,592
Award vesting period	2 years
Award expiration period	10 years
2011 Non-employee Directors' Equity Incentive Plan [Member] | Restricted Stock Units [Member]
Number of shares granted (in shares)					10,432	12,984	12,008
2005 Equity Incentive Plan [Member]
Maximum number of authorized shares available for issuance (in shares)		10,000,000								13,000,000
Number of additional authorized shares issued (in shares)								3,000,000
2005 Equity Incentive Plan [Member] | Restricted Stock Units [Member]
Award vesting period		3 years
Number of shares granted (in shares)					1,044,045	1,228,427	1,171,905
Description of vesting period					RSUs granted prior to December 10, 2012 vested or are vesting evenly over a period of five years.
2005 Equity Incentive Plan [Member] | Stock Option & Stock Appreciation Rights [Member]
Award vesting period		5 years
Award expiration period		10 years
2000 Equity Incentive Plan [Member]
Maximum number of authorized shares available for issuance (in shares)				7,000,000
2000 Equity Incentive Plan [Member] | Stock Option & Stock Appreciation Rights [Member]
Award vesting period			5 years
Award expiration period			10 years
2000 Non-employee Directors' Option Plan [Member]
Maximum number of authorized shares available for issuance (in shares)			100,000								250,000
Award vesting period				3 years
Award expiration period				10 years
Number of additional authorized shares issued (in shares)									150,000

X

- Definition

Weighted average remaining contractual term for stock option and equity-based awards excluding options outstanding and currently exercisable or convertible, 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockOptionAndEquityInstrumentsOtherThanOptionsExercisableWeightedAverageRemainingContractualTerms
Namespace Prefix:	grmn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average remaining contractual term for stock option and equity-based awards excluding options outstanding and currently exercisable or convertible, 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockOptionAndEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms
Namespace Prefix:	grmn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=grmn_StockOptionAndSARMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=grmn_NonEmployeeDirectorsEquityIncentivePlan2011Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=grmn_EquityIncentivePlan2005Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=grmn_EquityIncentivePlan2000Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PlanNameAxis=grmn_NonEmployeeDirectorsOptionPlan2000Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: