XML 128 R106.htm IDEA: XBRL DOCUMENT
v3.22.1

Financial risk management - Schedule of outstanding energy trading operations (Details) - Price risk - Electricity trading [member] - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | R$ (248,123) | R$ (189,018)
Probable |  |
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | (248,123) |
25% [member] |  |
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | (244,212) |
50% [member] |  |
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | (240,302) |
(25)% [member] |  |
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | (252,034) |
(50%) [member] |  |
Scenarios for sensitivity analysis |  |
Unrealized loss from electricity trading | R$ (255,942) |

X
- 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_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 24A -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_24A_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_CommodityPriceRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=ifrs-full_ElectricityDistributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RiskExposuresAxis=csan_VariationAnalysisProbableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RiskExposuresAxis=csan_VariationAnalysis25PercentageIncreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RiskExposuresAxis=csan_VariationAnalysis50PercentageIncreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RiskExposuresAxis=csan_VariationAnalysis25PercentageDecreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RiskExposuresAxis=csan_VariationAnalysis50PercentageDecreaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |