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28. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details 1) - shares	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
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

Number of treasury shares.

+ References

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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 2019-01-01
-Paragraph 79
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- Definition

The number of shares issued by the entity, for which full payment has not been received.

+ References

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-IssueDate 2019-01-01
-Paragraph 79
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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
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-Number 1
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