XML 91 R69.htm IDEA: XBRL DOCUMENT v3.22.1

Financial Assets and Liabilities - Summary of Financial Investments (Detail) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Cash and cash equivalents1 [line items]
Financial investments	R$ 13,481,291	R$ 8,522,465
Investment fund [member]
Cash and cash equivalents1 [line items]
Financial investments	8,103,713	2,155,446
Investment fund [member] | Repurchase agreements [member]
Cash and cash equivalents1 [line items]
Financial investments	1,680,328	1,672,688
Investment fund [member] | Bank certificate of deposits [member]
Cash and cash equivalents1 [line items]
Financial investments	6,423,385	475,213
Investment fund [member] | Other [Member]
Cash and cash equivalents1 [line items]
Financial investments		7,545
Bank investments [member]
Cash and cash equivalents1 [line items]
Financial investments	5,377,578	6,367,019
Bank investments [member] | Repurchase agreements [member]
Cash and cash equivalents1 [line items]
Financial investments	974,494	1,293,833
Bank investments [member] | Bank certificate of deposits [member]
Cash and cash equivalents1 [line items]
Financial investments	2,321,614	5,015,244
Bank investments [member] | Other [Member]
Cash and cash equivalents1 [line items]
Financial investments	R$ 2,081,470	R$ 57,942

X

- Definition

Cash and cash equivalents1 [line items].

+ References

No definition available.

+ Details

Name:	csan_CashAndCashEquivalents1LineItems
Namespace Prefix:	csan_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

A classification of cash equivalents representing short-term investments. [Refer: Cash equivalents]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2021-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_UnconsolidatedStructuredEntitiesAxis=ifrs-full_InvestmentFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=csan_RepurchaseAgreements1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=csan_BankCertificateOfDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=csan_OtherBankInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_UnconsolidatedStructuredEntitiesAxis=csan_BankInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: