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Share-based Payment - Summary of Share-based Payment Arrangements (Detail) - shares | 12 Months Ended |
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Dec. 31, 2021 | Dec. 31, 2020 | [1] | Dec. 31, 2019 | [1]
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 11,531,359 | 3,131,000 |
Number of share options granted | 28,984,479 |  |
Exercised /canceled /transferred | (13,391,968) |  |
Number Of Outstanding Share options | 15,592,511 | 10,536,790 | 11,478,287
Cosan S.A. [member] | Stock grant programs [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 9,946,886 |  |
Exercised /canceled /transferred | (2,145,646) |  |
Number Of Outstanding Share options | 7,801,240 |  |
Cosan S.A. [member] | Stock grant programs [member] | April 27, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | April 27, 2017 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,096,000 |  |
Exercised /canceled /transferred | (954,028) |  |
Number Of Outstanding Share options | 141,972 |  |
Cosan S.A. [member] | Stock grant programs [member] | July 31, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2017 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,192,428 |  |
Exercised /canceled /transferred | (396,848) |  |
Number Of Outstanding Share options | 795,580 |  |
Cosan S.A. [member] | Stock grant programs [member] | July 31, 2018 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2018 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 842,408 |  |
Exercised /canceled /transferred | (107,576) |  |
Number Of Outstanding Share options | 734,832 |  |
Cosan S.A. [member] | Stock grant programs [member] | July 31, 2019 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2019 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 229,020 |  |
Exercised /canceled /transferred | (20,080) |  |
Number Of Outstanding Share options | 208,940 |  |
Cosan S.A. [member] | Stock grant programs [member] | July 31, 2020 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2020 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 68,972 |  |
Exercised /canceled /transferred | (6,704) |  |
Number Of Outstanding Share options | 62,268 |  |
Cosan S.A. [member] | Stock grant programs [member] | July 31, 2021 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2021 |  |
Company | Cosan S.A. |  |
Expected life (years) | 3 years |  |
Number of share options granted | 424,839 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 424,839 |  |
Cosan S.A. [member] | Stock grant programs [member] | September 10, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | September 10, 2021 |  |
Company | Cosan S.A. |  |
Expected life (years) | 4 years |  |
Number of share options granted | 5,283,275 |  |
Exercised /canceled /transferred | (660,410) |  |
Number Of Outstanding Share options | 4,622,865 |  |
Cosan S.A. [member] | Stock grant programs [member] | October 11, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | October 11, 2021 |  |
Company | Cosan S.A. |  |
Expected life (years) | 5 years |  |
Number of share options granted | 809,944 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 809,944 |  |
Cosan S.A. [member] | Stock Grant Modification [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 6,470,410 |  |
Exercised /canceled /transferred | (6,470,410) |  |
Number Of Outstanding Share options |  |  |
Cosan S.A. [member] | Stock Grant Modification [member] | August 18, 2011 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 18, 2011 |  |
Company | Cosan S.A. |  |
Number of share options granted | 6,006,504 |  |
Exercised /canceled /transferred | (6,006,504) |  |
Number Of Outstanding Share options |  |  |
Cosan S.A. [member] | Stock Grant Modification [member] | August 31, 2015 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 31, 2015 |  |
Company | Cosan S.A. |  |
Number of share options granted | 463,906 |  |
Exercised /canceled /transferred | (463,906) |  |
Number Of Outstanding Share options |  |  |
Comgas [member] | Stock grant programs [member] | July 31, 2019 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2019 |  |
Company | Comgás |  |
Expected life (years) | 5 years |  |
Number of share options granted | 83,683 |  |
Exercised /canceled /transferred | (14,794) |  |
Number Of Outstanding Share options | 68,889 |  |
Comgas [member] | Stock grant programs [member] | April 20, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | April 20, 2017 |  |
Company | Comgás |  |
Expected life (years) | 5 years |  |
Number of share options granted | 61,300 |  |
Exercised /canceled /transferred | (61,300) |  |
Number Of Outstanding Share options |  |  |
Comgas [member] | Stock grant programs [member] | August 12, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 12, 2017 |  |
Company | Comgás |  |
Expected life (years) | 5 years |  |
Number of share options granted | 97,780 |  |
Exercised /canceled /transferred | (97,780) |  |
Number Of Outstanding Share options |  |  |
Comgas [member] | Stock grant programs [member] | August 1, 2018 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1, 2018 |  |
Company | Comgás |  |
Expected life (years) | 5 years |  |
Number of share options granted | 96,787 |  |
Exercised /canceled /transferred | (17,761) |  |
Number Of Outstanding Share options | 79,026 |  |
Comgas [member] | Cash Settled Transactions [Member] | November 1st, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | November 1<sup><span style="vertical-align: super; font-size: 8pt;">st</span></sup>, <span>2021</span> |  |
Company | Comgás |  |
Expected life (years) | 3 years |  |
Number of share options granted | 172,251 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 172,251 |  |
Compass Gas E Energia S A [Member] | Stock grant programs [member] | February 01, 2020 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | February 1, 2020 |  |
Company | Compass Gás e Energia |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,858,969 |  |
Exercised /canceled /transferred | (1,858,969) |  |
Number Of Outstanding Share options |  |  |
Compass Gas E Energia S A [Member] | Cash Settled Transactions [Member] | August 1st, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1<sup><span style="vertical-align: super; font-size: 8pt;">st</span></sup>, <span>2021</span> |  |
Company | Compass Gás e Energia |  |
Expected life (years) | 2 years |  |
Number of share options granted | 26,625 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 26,625 |  |
Compass Gas E Energia S A [Member] | Cash Settled Transactions [Member] | August 1st, 2021, Two [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1<sup><span style="vertical-align: super; font-size: 8pt;">st</span></sup>, <span>2021</span> |  |
Company | Compass Gás e Energia |  |
Expected life (years) | 3 years |  |
Number of share options granted | 152,770 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 152,770 |  |
Compass Gas E Energia S A [Member] | Cash Settled Transactions [Member] | November 1st, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | November 1<sup><sup><span style="vertical-align: super;">st</span></sup></sup>, <span>2021</span> |  |
Company | Compass Gás e Energia |  |
Expected life (years) | 3 years |  |
Number of share options granted | 1,474,367 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 1,474,367 |  |
Comgas and Compass Gas e Energia [member] | Stock grant programs [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 2,198,519 |  |
Exercised /canceled /transferred | (2,050,604) |  |
Number Of Outstanding Share options | 147,915 |  |
Rumo S.A. [member] | Stock grant programs [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 8,157,131 |  |
Exercised /canceled /transferred | (2,725,308) |  |
Number Of Outstanding Share options | 5,431,823 |  |
Rumo S.A. [member] | Stock grant programs [member] | August 1, 2018 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1, 2018 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,149,544 |  |
Exercised /canceled /transferred | (308,417) |  |
Number Of Outstanding Share options | 841,127 |  |
Rumo S.A. [member] | Stock grant programs [member] | January 2, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | January 2, 2017 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,476,000 |  |
Exercised /canceled /transferred | (1,476,000) |  |
Number Of Outstanding Share options |  |  |
Rumo S.A. [member] | Stock grant programs [member] | September 1, 2017 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | September 1, 2017 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 870,900 |  |
Exercised /canceled /transferred | (255,250) |  |
Number Of Outstanding Share options | 615,650 |  |
Rumo S.A. [member] | Stock grant programs [member] | August 15, 2019 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 15, 2019 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 843,152 |  |
Exercised /canceled /transferred | (147,214) |  |
Number Of Outstanding Share options | 695,938 |  |
Rumo S.A. [member] | Stock grant programs [member] | November 11, 2020 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | November 11, 2020 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 776,142 |  |
Exercised /canceled /transferred | (115,303) |  |
Number Of Outstanding Share options | 660,839 |  |
Rumo S.A. [member] | Stock grant programs [member] | May 05, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | May 05, 2021 |  |
Company | Rumo |  |
Expected life (years) | 5 years |  |
Number of share options granted | 1,481,000 |  |
Exercised /canceled /transferred | (414,702) |  |
Number Of Outstanding Share options | 1,066,298 |  |
Rumo S.A. [member] | Stock grant programs [member] | September 15, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | September 15, 2021 |  |
Company | Rumo |  |
Expected life (years) | 3 years |  |
Number of share options granted | 1,560,393 |  |
Exercised /canceled /transferred | (8,422) |  |
Number Of Outstanding Share options | 1,551,971 |  |
Moove [member] | Cash Settled Transactions [Member] | July 31, 2019 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2019 |  |
Company | Moove |  |
Expected life (years) | 5 years |  |
Number of share options granted | 132,670 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 132,670 |  |
Moove [member] | Cash Settled Transactions [Member] | July 31, 2020 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2020 |  |
Company | Moove |  |
Expected life (years) | 5 years |  |
Number of share options granted | 106,952 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 106,952 |  |
Moove [member] | Cash Settled Transactions [Member] | July 31, 2021 |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | July 31, 2021 |  |
Company | Moove |  |
Expected life (years) | 3 years |  |
Number of share options granted | 80,729 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 80,729 |  |
Compas Comercializacao [Member] | Cash Settled Transactions [Member] | August 1st, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1<sup><span style="vertical-align: super; font-size: 8pt;">st</span></sup>, <span>2021</span> |  |
Company | Compass Comercialização |  |
Expected life (years) | 2 years |  |
Number of share options granted | 31,535 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 31,535 |  |
TRSP [Member] | Cash Settled Transactions [Member] | August 1st, 2021 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Type of award / Grant date | August 1<sup><span style="vertical-align: super; font-size: 8pt;">st</span></sup>, <span>2021</span> |  |
Company | TRSP |  |
Expected life (years) | 3 years |  |
Number of share options granted | 33,634 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 33,634 |  |
Moove Compass Gas E Energia Compass Comercializacao TRSP and Comgas [Member] | Cash Settled Transactions [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted | 2,211,533 |  |
Exercised /canceled /transferred |  |  |
Number Of Outstanding Share options | 2,211,533 |  |
Bottom of range [member] | Cosan S.A. [member] | Stock Grant Modification [member] | August 18, 2011 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expected life (years) | 1 year |  |
Bottom of range [member] | Cosan S.A. [member] | Stock Grant Modification [member] | August 31, 2015 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expected life (years) | 5 years |  |
Top of range [member] | Cosan S.A. [member] | Stock Grant Modification [member] | August 18, 2011 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expected life (years) | 12 years |  |
Top of range [member] | Cosan S.A. [member] | Stock Grant Modification [member] | August 31, 2015 [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expected life (years) | 7 years |  |
[1] | On May 6, 2021, the Company split the issued shares, in the proportion of 1:4, without changing the share capital. The split of shares was approved at the Annual and Extraordinary General Meeting on April 30, 2021.

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