XML 154 R132.htm IDEA: XBRL DOCUMENT
v3.22.1

Property, plant and equipment, intangible assets, goodwill, right-of-use assets and contract assets - Schedule of Property Plant and Equipment (Parenthetical) (Detail) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Wagons and locomotives [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Bank loan guarantee | R$ 745,203 | R$ 745,203

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- Definition Bank loan guarantee. + References No definition available. + Details
Name: | csan_BankLoanGuarantee
Namespace Prefix: | csan_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=csan_WagonsAndLocomotivesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |