Earnings Per Share (Calculation Of Net Earnings Per Common Share ("EPS") - Basic And Diluted) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended					12 Months Ended
	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Document Period End Date	Dec. 29, 2013
Net earnings attributable to Starbucks	$ 540.7	$ (1,232.0)	$ 417.8	$ 390.4	$ 432.2	$ 8.3	$ 1,383.8
Weighted average common shares and common stock units outstanding (for basic calculation)	754.9				746.1
Dilutive effect of outstanding common stock options and RSUs	11.3				15.2
Weighted average common and common equivalent shares outstanding (for diluted calculation)	766.2				761.3
EPS - basic	$ 0.72				$ 0.58
EPS - diluted	$ 0.71				$ 0.57