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ACCOUNTING STANDARDS AND BASIS OF PREPARATION - IAS 29 (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ACCOUNTING STANDARDS AND BASIS OF PREPARATION
Annual	36.10%	53.80%	47.60%
Accumulated 3 years	209.20%	183.40%	148.00%

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- Definition

Accumulated consumer prices Index

+ References

No definition available.

+ Details

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- Definition

Consumer prices index.

+ References

No definition available.

+ Details

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Namespace Prefix:	supv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

Disclosure of significant accounting policies.

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No definition available.

+ Details

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