Assets Held For Sale (Revenues And Net Income Included in Consolidated Statement Of Operations) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended											12 Months Ended					0 Months Ended
	Sep. 24, 2011	Jun. 25, 2011	Mar. 26, 2011	Dec. 25, 2010		Sep. 25, 2010	Jun. 26, 2010	Mar. 27, 2010		Dec. 26, 2009		Sep. 24, 2011	Sep. 25, 2010		Sep. 26, 2009		Dec. 17, 2010 Filterfresh [Member]
Net sales	$ 711,883	$ 717,210	$ 647,658	$ 574,148	[1]	$ 373,087	$ 316,583	$ 321,953	[2]	$ 345,152	[2]	$ 2,650,899	$ 1,356,775		$ 786,135		$ 90,855
Net income												201,048	79,506		54,439		12,263
Less income attributable to noncontrolling interests																	1,051
Net income attributable to GMCR	$ 75,369	$ 56,348	$ 65,372	$ 2,412	[1]	$ 26,991	$ 18,400	$ 24,055	[2]	$ 10,060	[2]	$ 199,501	$ 79,506	[3]	$ 54,439	[3]	$ 11,212
Diluted net income per share	$ 0.47	$ 0.37	$ 0.44	$ 0.02	[1]	$ 0.20	$ 0.13	$ 0.17	[2]	$ 0.07	[2]	$ 1.31	$ 0.58	[3]	$ 0.45	[3]	$ 0.07

[1] As retrospectively adjusted upon finalization of the Van Houtte valuation and purchase price allocation.

[2] Restated to reflect a 3-for-1 stock split effective May 17, 2010.

[3] Previous years restated to reflect a 3-for-1 stock split effective May 17, 2010 and a 3-for-2 stock split effective June 8, 2009.