Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 02, 2023	Apr. 03, 2022	Apr. 02, 2023	Apr. 03, 2022
Net earnings including noncontrolling interests	$ 908.3	$ 675.0	$ 1,763.6	$ 1,491.1
Other comprehensive loss, net of tax:
Other comprehensive income/(loss)	17.3	6.8	(58.4)	113.1
Comprehensive income including noncontrolling interests	925.6	681.8	1,705.2	1,604.2
Comprehensive income attributable to noncontrolling interests	0.0	0.5	0.0	0.7
Comprehensive income attributable to Starbucks	925.6	681.3	1,705.2	1,603.5
Available-for-sale Securities [Member]
Other comprehensive loss, net of tax:
Unrealized holding gains/(losses) on available-for-sale securities, before tax	3.6	(10.5)	5.6	(13.9)
Unrealized holding gains/(losses) on available-for-sale securities, tax (expense)/benefit	(0.8)	2.6	(1.3)	3.4
Cash Flow Hedging [Member]
Other comprehensive loss, net of tax:
Unrealized gains/(losses) on hedging instruments, before tax	(1.2)	67.1	(181.9)	155.8
Unrealized gains/(losses) on hedging instruments, tax (expense)/benefit	0.1	(14.2)	29.6	(26.0)
Net Investment Hedging [Member]
Other comprehensive loss, net of tax:
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax	(2.7)	38.1	(67.3)	79.6
Reclassification adjustment for net (gains)/losses realized in net earnings for available-for-sale securities, hedging instruments, and translation adjustment, tax expense/(benefit)	0.7	(9.6)	17.0	(20.1)
Translation Adjustment [Member]
Other comprehensive loss, net of tax:
Translation adjustment and other, before tax	74.7	(38.5)	283.6	(24.3)
Translation adjustment and other, tax (expense)/benefit	0.0	0.0	0.0	0.0
Other comprehensive income/(loss)	74.7	(38.4)	283.6	(24.2)
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	(66.6)	(34.2)	(165.0)	(50.3)
Reclassification adjustment for net (gains)/losses realized in net earnings for available-for-sale securities, hedging instruments, and translation adjustment, tax expense/(benefit)	$ 9.5	$ 6.0	$ 21.3	$ 8.9