Employees
| Concept | As at 2025-03-31 | 
|---|---|
| Employees | |
| Metrics related to human capital diversity | |
| Metrics of reporting company | |
| Ratio of female employees in managerial positions | 
                                                0.114
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Ratio of male employees taking childcare leave | |
| Calculated based on provisions of Act on Promotion of Women's Active Engagement in Professional Life | |
| All employees | 
                                                0.750
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Regular employees | 
                                                0.750
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Non-regular employees | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Differences in wages between male and female employees | |
| All employees | 
                                                0.511
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Regular employees | 
                                                0.835
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Non-regular employees | 
                                                0.611
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |