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28. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details 1) - shares | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
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Earnings per share [line items] |  |  |
Number of shares outstanding | 1,458,191,883 | 1,458,191,883 | 1,458,191,883
Common Shares [Member] |  |  |
Earnings per share [line items] |  |  |
Common shares already paid up | 487,614,213 | 487,614,213 | 420,764,708
Common shares to be paid up |  |  | 66,849,505
Shares in treasury | (69) | (69) | (69)
Number of shares outstanding | 487,614,144 | 487,614,144 | 487,614,144
Preferred Shares [Member] |  |  |
Earnings per share [line items] |  |  |
Common shares already paid up | 971,138,388 | 971,138,388 | 838,076,946
Common shares to be paid up |  |  | 133,061,442
Shares in treasury | (560,649) | (560,649) | (560,649)
Number of shares outstanding | 970,577,739 | 970,577,739 | 970,577,739

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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 2019-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of shares issued by the entity, for which full payment has not been received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_ii&doctype=Standard -URIDate 2019-03-27 + Details
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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 2019-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2019-03-27 + Details
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