Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Net earnings including noncontrolling interests	$ 540.7	$ 432.4
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized holding gains/(losses)	20.4	(2.0)
Translation adjustment, before tax	(30.4)	(14.0)
Translation adjustment, tax (expense)/benefit	11.7	5.2
Other comprehensive income/(loss)	1.7	(10.8)
Comprehensive income including noncontrolling interests	542.4	421.6
Comprehensive income attributable to noncontrolling interests	0	0.2
Comprehensive income attributable to Starbucks	542.4	421.4
Available-for-sale Securities [Member]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized holding gains/(losses) on available-for-sale securities, before tax	(2.0)	0
Unrealized holding gains/(losses) on available-for-sale securities, tax (expense)/benefit	0.8	0
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized holding gains/(losses) on derivatives, before tax	11.8	(16.9)
Unrealized holding gains/(losses) on derivatives, tax (expense)/benefit	(3.9)	0.4
Reclassification adjustment for net (gains)/losses realized in earnings for cash flow hedges, before tax	7.6	5.8
Reclassification adjustment for net (gains)/losses realized in net earnings for cash flow hedges, tax expense/(benefit)	(0.1)	(0.6)
Net Investment Hedging [Member]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized holding gains/(losses) on derivatives, before tax	9.8	14.7
Unrealized holding gains/(losses) on derivatives, tax (expense)/benefit	$ (3.6)	$ (5.4)