Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 03, 2022	Mar. 28, 2021	Apr. 03, 2022	Mar. 28, 2021
Net earnings including noncontrolling interests	$ 675.0	$ 659.4	$ 1,491.1	$ 1,281.6
Other comprehensive loss, net of tax:
Other comprehensive income	6.8	19.6	113.1	238.3
Comprehensive income including noncontrolling interests	681.8	679.0	1,604.2	1,519.9
Comprehensive income attributable to noncontrolling interests	0.5	0.0	0.7	0.0
Comprehensive income attributable to Starbucks	681.3	679.0	1,603.5	1,519.9
Available-for-sale Securities [Member]
Other comprehensive loss, net of tax:
Unrealized holding gains/(losses) on available-for-sale securities, before tax	(10.5)	(2.5)	(13.9)	(3.0)
Unrealized holding gains/(losses) on available-for-sale securities, tax (expense)/benefit	2.6	0.5	3.4	0.6
Cash Flow Hedging [Member]
Other comprehensive loss, net of tax:
Unrealized gains/(losses) on hedging instruments, before tax	67.1	97.2	155.8	104.9
Unrealized gains/(losses) on hedging instruments, tax (expense)/benefit	(14.2)	(23.9)	(26.0)	(26.8)
Net Investment Hedging [Member]
Other comprehensive loss, net of tax:
Unrealized gains/(losses) on hedging instruments, before tax	38.1	47.7	79.6	17.5
Unrealized gains/(losses) on hedging instruments, tax (expense)/benefit	(9.6)	(12.1)	(20.1)	(4.5)
Translation Adjustment [Member]
Other comprehensive loss, net of tax:
Translation adjustment and other, before tax	(38.5)	(83.4)	(24.3)	155.3
Translation adjustment and other, tax (expense)/benefit	0.0	2.2	0.0	2.2
Other comprehensive income	(38.4)	(81.2)	(24.2)	157.5
Reclassification out of Accumulated Other Comprehensive Income [Member]
Other comprehensive loss, net of tax:
Reclassification adjustment for net (gains)/losses realized in net earnings for available-for-sale securities, hedging instruments, and translation adjustment, before tax	(34.2)	(7.9)	(50.3)	(11.5)
Reclassification adjustment for net (gains)/losses realized in net earnings for available-for-sale securities, hedging instruments, and translation adjustment, tax expense/(benefit)	$ 6.0	$ 1.8	$ 8.9	$ 3.6