Equity and Cost Investments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 29, 2013	Mar. 31, 2013	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Revenues generated from related parties, net of eliminations			$ 205.1	$ 190.3	$ 151.6
Related costs of sales, net of eliminations			115.4	111.0	83.2
Accounts receivables from equity method investees	48.3		48.3	33.0
Equity method investments	450.9		450.9	393.9
Percentage of investees financial information presented for equity method investments	100.00%		100.00%
Cost method investments	45.6		45.6	66.0
Ownership interest in Argentina joint venture sold	18.00%		18.00%
Proceeds from divestiture of interest in joint venture	4.4	50.3	108.0	0	0
Loss on sale of investments	1.0
Ownership interest in Mexico joint venture sold		18.00%
Gain on sale of investments		35.2
Company Store Investees [Member]
Cost method investments	19.0		19.0
Square Preferred Shares [Member]
Cost method investments				25.0
Starbucks Coffee Korea Co., Ltd. [Member]
Ownership percentage in equity investees	50.00%		50.00%
President Starbucks Coffee Taiwan Ltd. [Member]
Ownership percentage in equity investees	50.00%		50.00%
Shanghai President Coffee Co. [Member]
Ownership percentage in equity investees	50.00%		50.00%
Berjaya Starbucks Coffee Company Sdn. Bhd. (Malaysia) [Member]
Ownership percentage in equity investees	50.00%		50.00%
Tata Starbucks Limited (India) [Member]
Ownership percentage in equity investees	50.00%		50.00%
Starbucks Spain [Member]
Ownership percentage in equity investees	49.00%		49.00%
Starbucks Coffee Japan Ltd [Member]
Ownership percentage in equity investees	39.60%		39.60%
Market value of investment in Starbucks Japan	691		691
Equity method investments	$ 182.0		$ 182.0
North America Coffee Partnership [Member]
Ownership percentage in equity investees	50.00%		50.00%