v3.26.1
Segment Reporting (Narrative) (Details) - Reportable_segment
 3 Months Ended 9 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Segment Reporting [Line Items]        
Number of Reportable Segments     3  
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description     Our CODM evaluates the performance of our operating segments based primarily on net revenues and operating income, which represents earnings before other income and expenses and income taxes. Financial information and forecasts are reviewed by our CODM at the segment level, and are used to evaluate performance, monitor actual results versus forecasts, and allocate resources for the consolidated entity. Our CODM does not use total assets by segment as a basis for decision making.  
Segment Reporting, Customer, Extent of Reliance, Description     No customer accounts for 10% or more of our revenues  
Concentration Risk, Percentage | Japan, Canada and the UK Member [Domain] | Japan, Canada and the UK Member [Domain]        
Segment Reporting [Line Items]        
Concentration Risk, Percentage 72.00% 73.00% 72.00% 73.00%
Operating Segments | Channel Development        
Segment Reporting [Line Items]        
Segment Reporting, Product and Service, Revenue, Description     Channel Development revenues include packaged coffee, tea, foodservice products, and ready-to-drink beverage sales to customers outside of our company-operated and licensed stores. Most of our Channel Development revenues are from product sales to, and royalty revenues from, Nestlé through the Global Coffee Alliance.  
Operating Segments | North America and International Segments        
Segment Reporting [Line Items]        
Segment Reporting, Product and Service, Revenue, Description     North America 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.