Disclosure Of Sustainability-Related Financial Information
| Concept | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of Sustainability-related Financial Information | |||||||||||||
| Description of metrics related to policy on development of human resources and internal environment, and targets and performance using such metrics | |||||||||||||
| Metrics | 
                                                離職率
                                                
                                             | 
                                                コンプライアンス研修受講率
                                                
                                             | 
                                                顧客満足度
                                                
                                             | 
                                                温室効果ガス排出量削減率
                                                
                                             | 
                                                環境配慮型製品受注高
                                                
                                             | 
                                                人的資本投資額
                                                
                                             | 
                                                労働災害度数率
                                                
                                             | 
                                                採用者女性比率
                                                
                                             | 
                                                係長級に占める女性比率
                                                
                                             | 
                                                外国人社員数
                                                
                                             | 
                                                海外事業受注高
                                                
                                             | 
                                                新事業領域(水素、アンモニア、小水力)の受注高
                                                
                                             | 
                                                サステナビリティ調達比率
                                                
                                             | 
| Metrics unit | 
                                                %
                                                
                                             | 
                                                %
                                                
                                             | 
                                                %
                                                
                                             | 
                                                %
                                                
                                             | 
                                                億円
                                                
                                             | 
                                                円
                                                
                                             | — | 
                                                %
                                                
                                             | 
                                                %
                                                
                                             | 
                                                人
                                                
                                             | 
                                                億円
                                                
                                             | 
                                                億円
                                                
                                             | 
                                                %
                                                
                                             | 
| Target period | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | — | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | — | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
                                                2030年度
                                                
                                             | 
| Targets | 
                                                3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                90
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                46
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                47
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                20
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                15
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                78
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Performance | 
                                                4.5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                76.3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                32
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                25
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                73,985
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                12.1
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11.4
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                44
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                56
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |