Acquisitions (Impact On Shareholders' Equity Of Acquisition Of Minority Interest Holder) (Details) (USD $) In Millions	12 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Sep. 27, 2009
Net earnings attributable to Starbucks	$ 1,245.7	$ 945.6	$ 390.8
Decrease in additional paid-in capital for purchase of interest in subsidiary	(35.5)	(32.3)
Change from net earnings attributable to Starbucks and transfers to noncontrolling interest	1,217.7	918.8	390.8
Additional Paid-in Capital [Member]
Decrease in additional paid-in capital for purchase of interest in subsidiary	$ (28.0)	$ (26.8)	$ 0