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Investments in joint ventures (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments accounted for using equity method [abstract] |
Summary of Changes to Investments in Joint Ventures |
| Before reorganization |  |  |  |  |  |  |  |
| Raízen Combustíveis |  |  | Raízen Energia |  |  | Reorganization (note 2) |  |  | Raízen S.A. |  |
Shares issued by the joint venture | 1,661,418,472 |  |  | 7,243,283,198 |  |  | 1,447,807,814 |  |  | 10,352,509,484 |  |
Shares held by Cosan | 830,709,236 |  |  | 3,621,641,599 |  |  | 105,246,282 |  |  | 4,557,597,117 |  |
Cosan ownership interest | 50% |  |  | 50% |  |  | -6% |  |  | 44.02% |  |
At January 1, 2020 | 3,212,601 |  |  | 4,336,359 |  |  | — |  |  | 7,548,960 |  |
Interest in earnings of joint ventures | 332,240 |  |  | 250,761 |  |  | — |  |  | 583,001 |  |
Other comprehensive (losses) income | 376,053 |  |  | (446,001 | ) |  | — |  |  | (69,948 | ) |
Interest on capital | (73,388 | ) |  | — |  |  | — |  |  | (73,388 | ) |
Dividends | — |  |  | (417 | ) |  | — |  |  | (417 | ) |
At December 31, 2020 | 3,847,506 |  |  | 4,140,702 |  |  | — |  |  | 7,988,208 |  |
Interest in earnings of joint ventures (i) | 448,124 |  |  | (72,609 | ) |  | 4,215,116 |  |  | 4,590,631 |  |
Other comprehensive (losses) income | 215,787 |  |  | (491,548 | ) |  | (73,416 | ) |  | (349,177 | ) |
Interest on capital (ii) | (100,318 | ) |  | — |  |  | (122,480 | ) |  | (222,798 | ) |
Corporate reorganization (Note 2) | — |  |  | (3,204,832 | ) |  | 3,204,832 |  |  | — |  |
Dividends (ii) | (716,230 | ) |  | (371,713 | ) |  | 17,742 |  |  | (1,070,201 | ) |
At December 31, 2021 | 3,694,869 |  |  | — |  |  | 7,241,794 |  |  | 10,936,663 |  |
(i) As disclosed in Note 2, the conclusion of Raízen's IPO and the acquisition of Biosev resulted in two capitalizations in Raízen's equity of R$6,599,987 and R$2,347,281, respectively. Such capitalizations resulted in a dilution of Cosan S.A.'s interest in Raízen without the loss of shared control, keeping the investment classified as a joint venture. The following are the gains and losses recognized for the period:
Summary of gains and losses recognized in income under investment in joint venture |
Reduction on previously held interest | (896,817 | ) |
Increase in investment due to cash contribution by non-controlling shareholders in the IPO | 2,929,872 |  |
Exercise of subscription bonus - Hédera |  | 1,043,347 |  |
Other comprehensive income * | (82,243 | ) |
Gain on dilution | 2,994,159 |  |
Profit for the year under the equity method | 1,596,472 |  |
Interest in earnings of joint venture | 4,590,631 |  |
* Reclassification as part of the partial disposal.

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