Disclosure Of Sustainability-Related Financial Information
| Concept | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | 
|---|---|---|---|---|
| Disclosure of Sustainability-related Financial Information | ||||
| Scope 1 and 2 greenhouse gas emissions | ||||
| Gross scope 1 greenhouse gas emissions | 
                                                1,345
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,425
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,451
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,470
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 2 greenhouse gas emissions | 
                                                462
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                456
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                480
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                505
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 1 and 2 greenhouse gas emissions | 
                                                1,807
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,881
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,931
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,975
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             |