Additional amount of stock repurchase plan authorized.

No definition available.

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Namespace Prefix:	gmcr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the average price per share of shares acquired under the stock repurchase program.

+ References

No definition available.

+ Details

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Namespace Prefix:	gmcr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The discount percentage of the closing price of stock as of the business day immediately preceding the repurchase.

+ References

No definition available.

+ Details

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Namespace Prefix:	gmcr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate number of shares that have been repurchased during the period, without regard to whether the shares have been retired, are held in treasury, or are being held back pending finalization of an accelerated share repurchase program.

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
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- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=gmcr_ShareRepurchaseProgramOpenMarketTransactionsMember
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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended			12 Months Ended	22 Months Ended
	Jul. 31, 2015	Mar. 03, 2015	Feb. 28, 2014	Dec. 26, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 26, 2015	Dec. 26, 2015
Stockholders' equity
Additional amount authorized for repurchase of common stock	$ 1,000,000
Period of stock repurchase program	2 years
Amount authorized for repurchase of common stock	$ 3,500,000
Value of shares remaining for repurchase under the current authorization				$ 914,500				$ 914,500
Total cost of acquired shares				$ 235,035		$ 80,898	$ 1,033,321
ASR \| Bank
Stockholders' equity
Total cost of acquired shares			$ 700,000
Share Repurchase Program - privately negotiated transactions \| Lavazza
Stockholders' equity
Total cost of acquired shares		$ 623,600
Common stock
Stockholders' equity
Number of shares acquired				4,364,186
Common stock \| ASR \| Bank
Stockholders' equity
Number of shares acquired			4,340,508		1,489,476		1,489,476	5,829,984
Average price per share of acquired shares (in dollars per share)							$ 120.07	$ 120.07
Common stock \| Share Repurchase Program - open market transactions
Stockholders' equity
Number of shares acquired				4,364,186			4,307,488
Average price per share of acquired shares (in dollars per share)				$ 53.86			$ 95.13
Common stock \| Share Repurchase Program - privately negotiated transactions \| Lavazza
Stockholders' equity
Number of shares acquired		5,231,991					5,231,991
Average price per share of acquired shares (in dollars per share)		$ 119.18					$ 119.18
Stock repurchase price discount (as a percent)		3.00%