Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Mar. 30, 2014	Mar. 31, 2013
Net earnings including noncontrolling interests	$ 426.9	$ 390.7	$ 967.6	$ 823.1
Other comprehensive income/(loss), net of tax:
Reclassification adjustment for net (gains)/losses realized in earnings for cash flow hedges and available-for-sale securities, before tax	(2.2)	10.3	5.4	16.1
Reclassification adjustment for net (gains)/losses realized in net earnings for cash flow hedges and available-for-sale securities, tax expense/(benefit)	1.0	(0.8)	0.9	(1.4)
Translation adjustment, before tax	7.7	(35.7)	(22.7)	(49.7)
Translation adjustment, tax (expense)/benefit	(15.1)	(6.5)	(3.4)	(1.3)
Other comprehensive income/(loss)	(4.4)	(29.2)	(2.7)	(40.0)
Comprehensive income including noncontrolling interests	422.5	361.5	964.9	783.1
Comprehensive income/(loss) attributable to noncontrolling interests	(0.1)	0.3	0	0.6
Comprehensive income attributable to Starbucks	422.6	361.2	964.9	782.5
Available-for-sale Securities [Member]
Other comprehensive income/(loss), net of tax:
Unrealized holding gains/(losses) on available-for-sale securities, before tax	1.1	0	(0.9)	0
Unrealized holding gains/(losses) on available-for-sale securities, tax (expense)/benefit	(0.4)	0	0.4	0
Cash Flow Hedging [Member]
Other comprehensive income/(loss), net of tax:
Unrealized gains/(losses) on derivatives, before tax	8.1	(3.8)	19.9	(20.7)
Unrealized gains/(losses) on derivatives, tax (expense)/benefit	(2.1)	(0.1)	(6.0)	0.3
Net Investment Hedging [Member]
Other comprehensive income/(loss), net of tax:
Unrealized gains/(losses) on derivatives, before tax	(3.9)	11.7	5.9	26.4
Unrealized gains/(losses) on derivatives, tax (expense)/benefit	$ 1.4	$ (4.3)	$ (2.2)	$ (9.7)