Employees
| Concept | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | As at 2024-09-30 | 
|---|---|---|---|---|---|---|---|---|
| Employees | ||||||||
| Metrics related to human capital diversity | ||||||||
| Metrics of consolidated subsidiaries | ||||||||
| Consolidated subsidiaries | 
                                                株式会社インテルグロー
                                                
                                             | 
                                                株式会社ミック
                                                
                                             | 
                                                株式会社Maristo
                                                
                                             | 
                                                温調技研株式会社
                                                
                                             | 
                                                株式会社今村
                                                
                                             | 
                                                株式会社アルティス
                                                
                                             | 
                                                株式会社アベルコ
                                                
                                             | 
                                                株式会社マニックス
                                                
                                             | 
| Ratio of female employees in managerial positions | 
                                                0.005
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.050
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.009
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Ratio of male employees taking childcare leave | ||||||||
| All employees | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.037
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Regular employees | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Differences in wages between male and female employees | ||||||||
| All employees | 
                                                0.686
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.867
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.694
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.673
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.832
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.746
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.618
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.808
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Regular employees | 
                                                0.686
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.862
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.734
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.666
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.809
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.915
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.673
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.803
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Non-regular employees | 
                                                0.478
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.684
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                1.090
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.501
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.477
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.871
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |