v3.26.3
Business segments and geographic information - Narrative (Details) - segment
3 Months Ended 12 Months Ended
Sep. 25, 2026
Sep. 26, 2025
Jun. 26, 2026
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Number of operating segments 1    
Number of Reportable Segments 1    
Four customers | Trade accounts receivable | Customer Concentration Risk      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Concentration of risk percentage 10.00%    
Four customers | Revenue from contract with customer benchmark | Customer Concentration Risk      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Concentration of risk percentage 10.00%    
Percentage of revenue 0.467    
Three customers | Trade accounts receivable | Customer Concentration Risk      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Concentration of risk percentage     10.00%
Three customers | Revenue from contract with customer benchmark | Customer Concentration Risk      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Concentration of risk percentage   10.00%  
Percentage of revenue   0.515