Disclosure Of Sustainability-Related Financial Information
| Concept | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | 2020-04-01 to 2021-03-31 | 2019-04-01 to 2020-03-31 | 
|---|---|---|---|---|---|
| Disclosure of Sustainability-related Financial Information | |||||
| Scope 1 and 2 greenhouse gas emissions | |||||
| Gross scope 1 greenhouse gas emissions | 
                                                533,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                633,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                603,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                633,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 2 greenhouse gas emissions | 
                                                390,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                400,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                420,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                409,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                451,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 1 and 2 greenhouse gas emissions | 
                                                923,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                980,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,053,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,012,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,084,000
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             |