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35 Financial Instruments (Details 6) | 12 Months Ended
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Dec. 31, 2020
Until 2020 [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Indicator | Economic - financial efficiency and quality |
Criteria | 2 consecutive years or at the end of the 5-year period (2020) |
Penalties | Concession termination |
Until 2020 [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Indicator | Quality Indicators |
Criteria | 2 consecutive years or 3 times in 5 years |
Penalties | Limitation of dividend and interest on equity distribution |
Until 2020 [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Indicator | Economic - financial efficiency |
Criteria | in the base year |
Penalties | Capital Increase (a) Limitation of dividend and interest on equity distribution Restrictive regime for contracts with related parties | [1]
From The 6th Year Of (2021) [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Indicator | Economic and financial efficiency |
Criteria | 2 consecutive years |
Penalties | Concession termination |
From The 6th Year Of (2021) [member] |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |
Indicator | Quality Indicators |
Criteria | 3 consecutive years |
Penalties | Concession termination |
[1] | Within 180 days from the end of each fiscal year, in the totality of the insufficiency that occurs to reach the Minimum Economic and Financial Sustainability Parameter.

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