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Segment Information - Summary of Net Sales by Customer by Segment (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of operating segments [line items] |  |  |
Revenue | R$ 25,865,001 | R$ 20,437,835 | R$ 20,611,409
Operating segments [member] | Raízen |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 175,047,270 | 118,049,722 | 129,349,463
Operating segments [member] | Raízen | Ethanol [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 27,464,271 | 19,625,060 | 20,286,705
Operating segments [member] | Raízen | Sugar [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 13,946,480 | 10,241,141 | 3,925,499
Operating segments [member] | Raízen | Gasoline [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 55,158,035 | 36,127,017 | 46,140,529
Operating segments [member] | Raízen | Cogeneration [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 3,968,947 | 2,282,158 | 3,934,639
Operating segments [member] | Raízen | Other [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 7,288,547 | 2,807,127 | 3,540,068
Operating segments [member] | Raízen | Diesel [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 71,828,092 | 46,967,219 | 51,522,023
Operating segments [member] | Gas and Power [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 12,330,209 | 9,093,170 | 9,514,222
Operating segments [member] | Gas and Power [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 11,709,714 | 8,317,691 | 9,514,222
Operating segments [member] | Gas and Power [member] | Electricity distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 620,495 | 775,479 |
Operating segments [member] | Gas and Power [member] | Cogeneration [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 637,489 | 389,732 | 437,327
Operating segments [member] | Gas and Power [member] | Other [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 242,226 | 59,104 | 64,660
Operating segments [member] | Gas and Power [member] | Industrial [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 7,386,258 | 5,030,738 | 6,045,600
Operating segments [member] | Gas and Power [member] | Residential [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,610,286 | 1,381,597 | 1,295,107
Operating segments [member] | Gas and Power [member] | Automotive [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 364,664 | 220,130 | 350,637
Operating segments [member] | Gas and Power [member] | Construction revenue [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,020,176 | 885,630 | 813,341
Operating segments [member] | Gas and Power [member] | Commercial [member] | Gas distribution [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 448,615 | 350,760 | 507,550
Operating segments [member] | Moove [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 6,112,457 | 4,415,575 | 4,046,296
Operating segments [member] | Moove [member] | Finished goods [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 5,088,102 | 3,891,551 | 3,786,636
Operating segments [member] | Moove [member] | Basic oil [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 457,991 | 392,153 | 194,353
Operating segments [member] | Moove [member] | Services [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 566,364 | 131,871 | 65,307
Operating segments [member] | Logistics [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 7,439,632 | 6,966,159 | 7,087,840
Operating segments [member] | Logistics [member] | North Operation [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 5,479,583 | 5,270,436 | 5,313,757
Operating segments [member] | Logistics [member] | South Operation [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 1,624,084 | 1,409,872 | 1,478,314
Operating segments [member] | Logistics [member] | Container Operations [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 335,965 | 285,851 | 295,769
Operating segments [member] | Cosan Investiments |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 31,502 |  |
Operating segments [member] | Cosan Investiments | Land Leases [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 31,502 |  |
Unallocated amounts [member] | Cosan Corporate [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 8,292 | 818 | 98
Deconsolidated effects and eliminations [Member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (175,104,361) | (118,087,609) | (129,386,510)
Elimination of intersegment amounts [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (57,091) | (37,887) | (37,047)
Elimination of intersegment amounts [member] | Raízen |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | R$ (4,607,102) |  |

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