Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended
Jun. 28, 2014	Jun. 23, 2012 item
Noncontrolling Interests
Number of redeemable noncontrolling interests entities		2
Number of days in which company required to purchase shares	30 days
Mandatorily redeemable noncontrolling interest included in other current liabilities		$ 4.7

Represents the amount of mandatorily redeemable noncontrolling interest included in other current liabilities.

No definition available.

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