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

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ 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

Reference 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyDamagesSoughtValue
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) (Legal Proceedings, USD $) In Millions, unless otherwise specified	0 Months Ended			6 Months Ended
	Apr. 27, 2012 item	Nov. 29, 2010 item	Sep. 28, 2010 item	Mar. 28, 2015 item
Brad Barry action
Legal Proceedings
Number of affirmative defenses shared by all defendants				3
Putative securities fraud class actions
Legal Proceedings
Number of pending actions				1
Putative stockholder derivative actions
Legal Proceedings
Number of pending actions				2
Consolidated putative stockholder derivative action, District of Vermont
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
Antitrust litigation, putative class actions
Legal Proceedings
Number of pending actions				27
Club Coffee claim
Legal Proceedings
Amount of damages claimed				600