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 | 
                                                1,562
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,676
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,818
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,792
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                1,663
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 2 greenhouse gas emissions | 
                                                9,280
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                8,233
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                11,219
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                9,143
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                8,100
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
| Gross scope 1 and 2 greenhouse gas emissions | 
                                                10,842
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                9,909
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                13,037
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                10,935
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             | 
                                                9,763
                                                
                                                    
                                                        utr:tCO2e
                                                    
                                                
                                             |