Selected Quarterly Financial Information (Schedule of Selected Quarterly Financial Information)(Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 30, 2012		Sep. 28, 2014	Sep. 29, 2013		Sep. 30, 2012
Selected Quarterly Financial Information [Abstract]
Total net revenues	$ 4,180.8	$ 4,153.7	$ 3,873.8	$ 4,239.6	$ 3,788.8	[1]	$ 3,735.3	[1]	$ 3,549.6	[1]	$ 3,793.2	[1]	$ 16,447.8	$ 14,866.8	[1]	$ 13,276.8
Operating income/(loss)	854.9	768.5	644.1	813.5	(2,115.2)	[2]	615.2		544.1		630.6		3,081.1	(325.4)	[2]	1,997.4
Net earnings/(loss) attributable to Starbucks	587.9	512.6	427.0	540.7	(1,232.0)	[2]	417.8		390.4		432.2		2,068.1	8.3	[2]	1,383.8
EPS - diluted	$ 0.77	$ 0.67	$ 0.56	$ 0.71	$ (1.64)	[2]	$ 0.55		$ 0.51		$ 0.57		$ 2.71	$ 0.01	[2]	$ 1.79
Reclassification resulting from correction of an immaterial error					6.2		6.4		6.3		6.4			25.4		22.7
Litigation charge					$ 2,784.1

[1] Includes the reclassifications resulting from the correction of the immaterial error discussed in Note 1, Summary of Significant Accounting Policies. We reclassified $6.4 million, $6.3 million, $6.4 million and $6.2 million for the first, second, third, and fourth quarters of fiscal year 2013, respectively, and $25.4 million for the full year of fiscal 2013.

[2] The fourth quarter of fiscal 2013 includes a pretax charge of $2,784.1 million resulting from the conclusion of the arbitration with Kraft.