Other Intangible Assets and Goodwill (Changes In Carrying Amount Of Goodwill By Reportable Operating Segment) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2018	Oct. 01, 2017		Oct. 02, 2016
Goodwill [Line Items]
Goodwill, beginning balance	$ 1,539,200,000	$ 1,719,600,000
Acquisition/(divestiture)	2,162,500,000	(7,600,000)
Impairment	(37,600,000)	(87,200,000)		$ 0
Other	(122,500,000)	(85,600,000)	[1]
Goodwill, ending balance	3,541,600,000	1,539,200,000		1,719,600,000
Americas [Member]
Goodwill [Line Items]
Goodwill, beginning balance	211,600,000	210,100,000
Acquisition/(divestiture)	0	0
Impairment	0	0
Other	285,800,000	1,500,000	[1]
Goodwill, ending balance	497,400,000	211,600,000		210,100,000
China/Asia Pacific [Member]
Goodwill [Line Items]
Goodwill, beginning balance	850,200,000	944,900,000
Acquisition/(divestiture)	2,164,000,000	(7,600,000)
Impairment	0	0
Other	(27,600,000)	(87,100,000)	[1]
Goodwill, ending balance	2,986,600,000	850,200,000		944,900,000
EMEA [Member]
Goodwill [Line Items]
Goodwill, beginning balance	37,200,000	55,100,000
Acquisition/(divestiture)	0	0
Impairment	37,600,000	(17,900,000)
Other	11,700,000	0	[1]
Goodwill, ending balance	11,300,000	37,200,000		55,100,000
Channel Development [Member]
Goodwill [Line Items]
Goodwill, beginning balance	30,200,000	30,200,000
Acquisition/(divestiture)	(1,500,000)	0
Impairment	0	0
Other	6,000,000	0	[1]
Goodwill, ending balance	34,700,000	30,200,000		30,200,000
Corporate and Other [Member]
Goodwill [Line Items]
Goodwill, beginning balance	410,000,000	479,300,000
Acquisition/(divestiture)	0	0
Impairment	0	(69,300,000)
Other	(398,400,000)	0	[1]
Goodwill, ending balance	$ 11,600,000	$ 410,000,000		$ 479,300,000

[1] “Other” consists of changes in the goodwill balance resulting from transfers between segments due to the dissolution of the Teavana reporting unit as well as foreign currency translation, as applicable.For goodwill related to our Switzerland retail reporting unit, we initially recorded an impairment charge of $17.9 million in the third quarter of fiscal 2017. This was primarily due to the impacts of the strength of the Swiss franc, continued shift of consumer behaviors to neighboring countries and the relocation of certain businesses sustaining beyond our projections and indicating the reporting unit's carrying value would not be fully recovered. Since then, the operational investments and improvements we made did not sufficiently slow the performance decline, and we recorded impairment charges of $37.6 million for the remaining Switzerland goodwill balance during fiscal 2018. During the third quarter of fiscal 2017, management finalized its long-term strategy for the Teavana reporting unit. The plan emphasizes sales of premium TeavanaTM/MC tea products at Starbucks branded stores and, to a lesser extent, consumer product channels. This change in strategic direction triggered an impairment test first of the retail store assets and then an impairment test of the goodwill asset, which also coincided with our annual goodwill testing process. The retail store assets were determined to be fully impaired, which resulted in a charge of $33.0 million. For goodwill, we utilized a combination of income and market approaches to determine the implied fair value of the reporting unit. These approaches used primarily unobservable inputs, including discount, sales growth and royalty rates and valuation multiples of a selection of similar publicly traded companies, which are considered Level 3 fair value measurements. We then compared the implied fair value with the carrying value and recognized a goodwill impairment charge of $69.3 million, thus reducing goodwill of the Teavana reporting unit to $398.3 million as of July 2, 2017. During the third quarter of fiscal 2018, we dissolved the Teavana reporting unit upon completion of the retail store closures. As a result, we reorganized the Teavana business and allocated the remaining $398.3 million of goodwill to other reporting units, primarily within the Americas segment, based on a relative fair value approach. Other intangible assets of $117.2 million, consisting primarily of the indefinite-lived tradename and definite-lived tea recipes, were also tested, and no impairment losses were recorded.