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26. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details 1) - shares	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings per share [line items]
Number of shares outstanding	1,692,711,172	1,692,711,172	1,692,711,172
Common Shares [member]
Earnings per share [line items]
Common shares already paid up	566,036,634	566,036,634	566,036,634
Shares in treasury	(79)	(79)	(79)
Number of shares outstanding	566,036,555	566,036,555	566,036,555
Preferred Shares [member]
Earnings per share [line items]
Common shares already paid up	1,127,325,434	1,127,325,434	1,127,325,434
Shares in treasury	(650,817)	(650,817)	(650,817)
Number of shares outstanding	1,126,674,617	1,126,674,617	1,126,674,617

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- Definition

Number of treasury shares.

+ References

No definition available.

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The number of shares issued by the entity, for which full payment has been received.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 79
-Subparagraph a
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_ii&doctype=Standard
-URIDate 2020-01-01

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- Definition

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iv&doctype=Standard
-URIDate 2020-01-01

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