Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2013	Jun. 23, 2012	Jun. 29, 2013	Jun. 23, 2012
Numerator for basic and diluted earnings per share:
Net income attributable to GMCR	$ 116,272	$ 73,296	$ 356,276	$ 270,741
Denominator:
Basic weighted average shares outstanding	149,825,581	155,459,690	149,307,144	155,071,117
Effect of dilutive securities (in shares)	3,043,811	3,839,888	3,340,623	4,293,323
Diluted weighted average shares outstanding	152,869,392	159,299,578	152,647,767	159,364,440
Basic and diluted net income per common share
Basic net income per common share (in dollars per share)	$ 0.78	$ 0.47	$ 2.39	$ 1.75
Diluted net income per common share (in dollars per share)	$ 0.76	$ 0.46	$ 2.33	$ 1.70
Diluted earnings per share, other disclosure
Antidilutive securities excluded from computation of earnings per share (in shares)	607,000	1,198,000	954,000	557,000