| Income | — | — |
| Revenue from operations | 117,453.9a | 114,859.1a |
| Other income | 8,941a | 4,554.3a |
| Total income | 126,394.9a | 119,413.4a |
| Expenses | — | — |
| Fuel cost | -44,560.3a | -45,816a |
| Purchase of stock-in-trade | -1,403.9a | -1,247.9a |
| Changes in inventories | 0a | -6.3a |
| Employee benefits expense | -4,642.9a | -3,644.7a |
| Finance costs | -22,691.3a | -20,534a |
| Depreciation and amortisation expense | -16,546.4a | -16,334.1a |
| Other expenses | -14,638.6a | -10,326.4a |
| Total expenses | -104,483.4a | -97,909.4a |
| Share of profit of joint venture and an associate | 227.5a | 165.1a |
| Profit before tax and deferred tax adjustable in future tariff | 22,139a | 21,669.1a |
| Tax expense | — | — |
| Current tax | -3,867.8a | -3,938.4a |
| Deferred tax | -1,560.5a | -1,042.4a |
| Deferred tax adjustable in future tariff | 2.9a | 1,526.6a |
| Profit for the year | 19,828.8a | 17,246.5a |
| Attributable to | — | — |
| Owners of the parent | 19,508.9a | 17,227.1a |
| Non controlling interests | 319.9a | 19.4a |
| Other comprehensive income | — | — |
| Items that will not be reclassified to profit or loss | — | — |
| Remeasurements of the net defined benefit plans | -12.8a | -0.7a |
| Equity instruments through other comprehensive income | 16,319a | 9,952.5a |
| Income tax relating to items that will not be reclassified to profit or loss | -3,458.4a | -1,159.8a |
| Total | 12,847.8a | 8,792a |
| Items that will be reclassified to profit or loss | — | — |
| Exchange differences in translating the financial statements of foreign operations | -76.2a | 22.6a |
| Effective portion of cash flow hedge | 570.5a | -999.4a |
| Income tax relating to items that will be reclassified to profit or loss | -189.7a | 251.5a |
| Deferred tax adjustable in future tariff | 189.7a | -251.5a |
| Total | 494.3a | -976.8a |
| Total other comprehensive income | 13,342.1a | 7,815.2a |
| Attributable to | — | — |
| Owners of the parent | 13,384.6a | 7,753.4a |
| Non controlling interests | -42.5a | 61.8a |
| Total comprehensive income for the year | 33,170.9a | 25,061.7a |
| Owners of the parent | 32,893.5a | 24,980.5a |
| Non controlling interests | 277.4a | 81.2a |