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Shareholders' equity (Tables) | 12 Months Ended
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Dec. 31, 2021
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Summary of Share Capital | At December 31, 2021, share capital is composed of the following:
Shareholders | Common shares |  |  | % |
Controlling group | 672,762,132 |  |  | 35.90% |
Board of directors and executive officers | 25,285,335 |  |  | 1.35% |
Free float | 1,170,582,693 |  |  | 62.46% |
Total of shares | 1,868,630,160 |  |  | 99.71% |
Treasury shares | 5,440,772 |  |  | 0.29% |
Total of shares | 1,874,070,932 |  |  | 100.00% |
Summary of Other Comprehensive (Loss) Income | f) Other comprehensive (loss) income
| December 31, 2020 |  |  | Comprehensive (loss) income |  |  | December 31, 2021 |  |
Loss on cash flow hedge | (1,316,502 | ) |  | (601,415 | ) |  | (1,917,917 | ) |
Foreign currency translation differences | 6,514 |  |  | 89,848 |  |  | 96,362 |  |
Actuarial loss on defined benefit plan | (217,771 | ) |  | 41,832 |  |  | (175,939 | ) |
Gain on measurement of financial instrument | 15,000 |  |  | — |  |  | 15,000 |  |
Change in fair value of financial assets | 1,555 |  |  | 2,269 |  |  | 3,824 |  |
| (1,511,204 | ) |  | 914,332 |  |  | (596,872 | ) |
Attributable to: |  |  |  |  |  |  |  |  |
Owners of the Company | (1,524,027 | ) |  | 1,002,418 |  |  | (521,609 | ) |
Non-controlling interests | 12,823 |  |  | (88,086 | ) |  | (75,263 | ) |
| December 31, 2019 |  |  | Comprehensive (loss) income |  |  | December 31, 2020 |  |
Loss on cash flow hedge | (790,403 | ) |  | (526,099 | ) |  | (1,316,502 | ) |
Foreign currency translation differences | 49,281 |  |  | (42,767 | ) |  | 6,514 |  |
Actuarial loss on defined benefit plan | (180,958 | ) |  | (36,813 | ) |  | (217,771 | ) |
Gain on measurement of financial instrument | 15,000 |  |  | — |  |  | 15,000 |  |
Change in fair value of financial assets | 1,277 |  |  | 278 |  |  | 1,555 |  |
| (905,803 | ) |  | (605,401 | ) |  | (1,511,204 | ) |
Attributable to: |  |  |  |  |  |  |  |  |
Owners of the Company | (805,471 | ) |  | (718,556 | ) |  | (1,524,027 | ) |
Non-controlling interests | (100,332 | ) |  | 113,155 |  |  | 12,823 |  |

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