Represents the number of affirmative defenses shared by all defendants.

No definition available.

Name:	gmcr_NumberOfAffirmativeDefensesSharedByDefendants
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of separate complaints ordered by the federal court to be consolidated into the pending action during the period.

+ References

No definition available.

+ Details

Name:	gmcr_NumberOfComplaintsOrderedToBeConsolidated
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of separate complaints in the consolidated action.

+ References

No definition available.

+ Details

Name:	gmcr_NumberOfSeparateComplaintsInConsolidatedAction
Namespace Prefix:	gmcr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualProvision
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified	0 Months Ended			12 Months Ended
	Apr. 27, 2012 claim	Nov. 09, 2010 claim	Sep. 28, 2010 claim	Sep. 27, 2014 claim
Pending Litigation [Member] \| Council for Education and Research on Toxics vs Brad Barry LLC and Starbucks Corp [Member]
Legal Proceedings
Number of affirmative defenses shared by all defendants				3
Pending Litigation [Member] \| Putative Securities Fraud Class Actions [Member]
Legal Proceedings
Number of pending actions				1
Pending Litigation [Member] \| Putative Stockholder Derivative Actions [Member]
Legal Proceedings
Number of pending actions				2
Pending Litigation [Member] \| Consolidated Putative Stockholder Derivative Action District of Vermont [Member]
Legal Proceedings
Number of separate complaints in consolidated action				5
Number of separate complaints filed after disclosure of SEC Inquiry			2
Number of separate complaints ordered by federal court to be consolidated into the action	2	2
Pending Litigation [Member] \| Antitrust Litigation Putative Class Action [Member]
Legal Proceedings
Number of pending actions				27
Damages from Product Defects [Member]
Legal Proceedings
Net charge for estimated cost related to potential issue with certain Keurig brewers				$ 10.0