XML 207 R185.htm IDEA: XBRL DOCUMENT v3.22.1

Financial Assets and Liabilities - Summary of movement of the obligation with preferred shareholders (Detail) R$ in Thousands	Dec. 31, 2021 BRL (R$)
Disclosure Of Movement Obligation With Preferred Shareholders [Line Items]
Beginning balance	R$ 387,044
Ending balance

X

- Definition

Disclosure of movement obligation with preferred shareholders.

+ References

No definition available.

+ Details

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

X

- Definition

Preferred shareholders payable subsidiaries non current

+ References

No definition available.

+ Details

Name:	csan_PreferredShareholdersPayableSubsidiariesNonCurrent
Namespace Prefix:	csan_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant