XML 179 R157.htm IDEA: XBRL DOCUMENT
v3.22.1

Provision for legal proceedings and judicial deposits - Contingent assets - Additional Information (Detail) - Legal proceedings contingent assets [member] - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 06, 2019
--- | --- | ---
Contingent assets |  |
Contingent asset recognized for tax contingencies | R$ 932,000 |
Comgas [member] |  |
Contingent assets |  |
Indemnity proceeding due to the economic and financial imbalance of the Concession Agreement | R$ 658,096 |
ARSESP 933 Resolution [Member] | Comgas [member] |  |
Contingent assets |  |
Contingent asset recognized for service concession arrangement |  | R$ 683,358

X
- Definition The amount of contingent asset recognized for service concession arrangement. + References No definition available. + Details
Name: | csan_ContingentAssetRecognizedForServiceConcessionArrangement
Namespace Prefix: | csan_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of contingent asset recognized for tax contingencies. + References No definition available. + Details
Name: | csan_ContingentAssetRecognizedForTaxContingencies
Namespace Prefix: | csan_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amount of the estimated financial effect of possible assets that arise from past events and whose existence will be confirmed only by the occurrence or non-occurrence of one or more uncertain future events not wholly within control of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 89 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_89&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_EstimatedFinancialEffectOfContingentAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | csan_ClassesOfContingentAssetsAxis=csan_LegalProceedingsContingentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=csan_ComgasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | csan_ResolutionTypeAxis=csan_Arsesp933ResolutionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |