Activity and structure of Inter and its subsidiaries (Details) - HoldFin	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
General Information [Line Items]
Percentage ownership of entity shares	100.00%
Overall equity interest (as a percent)	100.00%	0.00%

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 27
-IssueDate 2021-01-01
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-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2021-01-01
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2021-01-01
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Balance Type:	na
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