3.1.1.3 Revenue from contracts with customers under IFRS 15, by time of recognition
| 2021 | Exploration and Production |
Trade and Storage |
Distribution | Generation | Other segments |
Reconciliation with consolidated data |
Total |
| Revenue recognised at a point in time | 8,883 | 47,224 | 283 | 583 | 295 | (6,692) | 50,576 |
| Revenue recognised over time | 7,006 | 13,419 | 5,109 | 2,841 | 247 | (8,562) | 20,060 |
| Total revenue from contracts with customers under IFRS 15 |
15,889 | 60,643 | 5,392 | 3,424 | 542 | (15,254) | 70,636 |
| 2020 | Exploration and Production |
Trade and Storage |
Distribution | Generation | Other segments |
Reconciliation with consolidated data |
Total |
| Revenue recognised at a point in time | 2,868 | 20,184 | 250 | 457 | 277 | (1,187) | 22,849 |
| Revenue recognised over time | 1,743 | 9,396 | 4,414 | 2,316 | 193 | (2,800) | 15,262 |
| Total revenue from contracts with customers under IFRS 15 |
4,611 | 29,580 | 4,664 | 2,773 | 470 | (3,987) | 38,111 |
With respect to the classification of revenue from contracts with customers according to the timing of the performance obligation, the vast majority of revenue was realized at a specific point in time (of which the majority was revenue from sales on energy exchanges). Revenue realized over time accounted for the majority of revenue earned in the Distribution and Generation segments, where revenue is generated from the distribution of gaseous fuel and the generation and distribution of heat, respectively.