Employees
| Concept | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2022-03-31 | As at 2021-03-31 | As at 2020-03-31 | 
|---|---|---|---|---|---|---|---|---|
| Employees | ||||||||
| Information about reporting company | ||||||||
| Number of employees of reporting company | ||||||||
| Number of employees | 
                                                1,307
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                59
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,247
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,314
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,344
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,356
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1,352
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |