Acquisitions (Impact on Shareholder’s Equity of Acquisition of Minority Interest Holder) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Oct. 02, 2011
Net earnings attributable to Starbucks	$ 8.3	$ 1,383.8	$ 1,245.7
Decrease in additional-paid-in capital for purchase of interest in subsidiary			(35.5)
Change from net earnings attributable to Starbucks and transfers to noncontrolling interest	8.3	1,383.8	1,217.7
Additional Paid-in Capital [Member]
Decrease in additional-paid-in capital for purchase of interest in subsidiary	$ 0	$ 0	$ (28.0)