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Segment Reporting (Narrative) (Details) | 12 Months Ended
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Sep. 27, 2020 | Sep. 29, 2019 | Sep. 30, 2018
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 | 3 |  |
Disclosure of significant customers | No customer accounts for 10% or more of our revenues |  |
Total net revenues [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 100.00% | 100.00% | 100.00%
Total net revenues [Member] | Japan, Canada and the UK Member [Domain] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 78.00% |  |
Operating Segments [Member] | Americas and International [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Reporting Information, Description of Products and Services | Americas and International 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] |  |  |
Segment Reporting Information, Description of Products and Services | Channel Development revenues include packaged coffee sales, tea and ready-to-drink beverages to customers outside of our company-operated and licensed stores. Historically revenues have included domestic and international sales of our packaged coffee, tea and ready-to-drink products to grocery, warehouse club and specialty retail stores and through institutional foodservice companies which serviced businesses. Since the fourth quarter of fiscal 2018, most of our Channel Development revenues are from product sales to and royalty revenues from Nestlé. The collaborative business relationships for ready-to-drink products and the associated revenues remain unchanged due to the Global Coffee Alliance. |  |

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