The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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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.

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- Definition

The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]]

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- Definition

The measure of a potential loss exposure as a result of future market movements, based on a specified confidence interval and measurement horizon.

+ References

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The average strike rate per share.

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- Definition

The amount of cash outflow (inflow) from settlement of derivatives.

+ References

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Additional information about derivatives financial instruments - Option related to SPCs Casa dos Ventos (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) R$ / shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative financial instruments.
Financial settlement inflows (outflows)	$ (324,000,000)	$ (67,000,000)	$ (240,000,000)
Call Option -SPC - Brought [Member]
Derivative financial instruments.
Notional (quantity)	137,751,623
Average strike per share \| R$ / shares	2.77
Fair value of assets	$ 24,000,000
Value at risk	2,000,000
Call Option -SPC - Brought [Member] \| 2022
Derivative financial instruments.
Fair value of assets	$ 24,000,000