Other Intangible Assets and Goodwill (Changes In Carrying Amount Of Goodwill By Reportable Operating Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016		Sep. 27, 2015
Goodwill [Line Items]
Goodwill, beginning balance	$ 1,719.6	$ 1,575.4
Acquisition/(divestiture)	(7.6)	2.7
Impairment	(87.2)	0.0		$ 0.0
Other	(85.6)	141.5	[1]
Goodwill, ending balance	1,539.2	1,719.6		1,575.4
Americas [Member]
Goodwill [Line Items]
Goodwill, beginning balance	211.6	211.2
Acquisition/(divestiture)	0.0	0.0
Impairment	0.0
Other	1.5	0.4	[1]
Goodwill, ending balance	213.1	211.6		211.2
China/Asia Pacific [Member]
Goodwill [Line Items]
Goodwill, beginning balance	944.9	804.1
Acquisition/(divestiture)	(7.6)	0.0
Impairment	0.0
Other	(87.1)	140.8	[1]
Goodwill, ending balance	850.2	944.9		804.1
EMEA [Member]
Goodwill [Line Items]
Goodwill, beginning balance	55.1	57.4
Acquisition/(divestiture)	0.0	(2.6)
Impairment	17.9
Other	0.0	0.3	[1]
Goodwill, ending balance	37.2	55.1		57.4
Channel Development [Member]
Goodwill [Line Items]
Goodwill, beginning balance	23.8	23.8
Acquisition/(divestiture)	0.0	0.0
Impairment	0.0
Other	0.0	0.0	[1]
Goodwill, ending balance	23.8	23.8		23.8
All Other Segments [Member]
Goodwill [Line Items]
Goodwill, beginning balance	484.2	478.9
Acquisition/(divestiture)	0.0	5.3
Impairment	69.3
Other	0.0	0.0	[1]
Goodwill, ending balance	$ 414.9	$ 484.2		$ 478.9

[1] “Other” primarily consists of changes in the goodwill balance as a result of foreign currency translation. During the third quarter of fiscal 2017, management finalized its long-term strategy for the Teavana reporting unit. The plan emphasizes sales of premium Teavana™ tea products at Starbucks branded stores and, to a lesser extent, consumer product channels. The existing portfolio of Teavana-branded retail stores are expected to be closed over the next several quarters. 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. 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 October 1, 2017. The remaining intangible assets for the Teavana reporting unit of $117.2 million, consisting primarily of the indefinite-lived tradename and finite-lived tea recipes, were also tested, and no impairment losses were recorded.The ongoing impact of the macro economic challenges we have experienced in our EMEA company-owned markets and the continued strength of the Swiss franc, when compared to the relatively inexpensive euro in surrounding countries, have posed strong headwinds to our Switzerland retail reporting unit. Our latest mitigation efforts incorporated into our Level 3 fair value calculation for our Switzerland retail business are not expected to fully recover the reporting unit’s carrying value given the sustained nature of these and other external factors on consumer behavior and tourism. As a result, we recorded a goodwill impairment charge of $17.9 million in the third quarter of fiscal 2017, and, as of October 1, 2017, we had approximately $37 million of goodwill remaining on our condensed consolidated balance sheet associated with this reporting unit.