Segment Reporting (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Basis for segment information					Segment information is prepared on the same basis that our ceo, who is our chief operating decision maker, manages the segments, evaluates financial results, and makes key operating decisions.
Number of reportable segments					4
Effect on previously reported segment information for change in reportable operating segments					Concurrent with the change in reportable operating segments and realignment of certain operating expenses noted above, we revised our prior period financial information to reflect comparable financial information for the new segment structure and reporting changes. Historical financial information presented herein reflects these changes. There was no impact on consolidated net revenues, total operating expenses, operating income, or net earnings as a result of these changes.
Disclosure of significant customers					No customer accounts for 10% or more of our revenues
Reclassification resulting from correction of an immaterial error	$ 6.2	$ 6.4	$ 6.3	$ 6.4		$ 25.4	$ 22.7
Canada UK and China [Member]
Segment Reporting Information [Line Items]
Percentage of revenue from other countries					65.00%
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Description of segment products and services					Americas, EMEA and CAP operations sell coffee and other beverages, complementary food, packaged coffees, single-serve coffee products and a focused selection of merchandise through company-operated stores and licensed stores.
Operating Segments [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Description of segment products and services					Americas, EMEA and CAP operations sell coffee and other beverages, complementary food, packaged coffees, single-serve coffee products and a focused selection of merchandise through company-operated stores and licensed stores.
Operating Segments [Member] | China / Asia Pacific [Member]
Segment Reporting Information [Line Items]
Description of segment products and services					Americas, EMEA and CAP operations sell coffee and other beverages, complementary food, packaged coffees, single-serve coffee products and a focused selection of merchandise through company-operated stores and licensed stores.
Operating Segments [Member] | Channel Development [Member]
Segment Reporting Information [Line Items]
Description of segment products and services					Channel Development operations sell a selection of packaged coffees as well as a selection of premium Tazo® teas globally. Channel Development operations also produce and sell a variety of ready-to-drink beverages, such as Frappuccino® coffee drinks, Starbucks Doubleshot® espresso drinks and Starbucks Refreshers® beverages, as well as Starbucks- and Tazo-branded single-serve products. The US foodservice business, which is included in the Channel Development segment, sells coffee and other related products to institutional foodservice companies.
Reclassification resulting from correction of an immaterial error						21.8	19.2
Operating Segments [Member] | All Other Segments [Member]
Segment Reporting Information [Line Items]
Description of All Other Segments					Other is now referred to as All Other Segments and includes Teavana, Seattle's Best Coffee and Evolution Fresh, as well as our Digital Ventures business
Reclassification resulting from correction of an immaterial error						$ 3.6	$ 3.5