Employees
| Concept | As at 2023-11-30 | As at 2023-05-31 | As at 2022-11-30 | 
|---|---|---|---|
| Employees | |||
| Information about group | |||
| Number of employees of group | |||
| Number of employees | 
                                                1,138
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,138
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,109
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | 
                                                86
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                85
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                78
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |