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v3.20.1

Risks and Financial Instruments - Additional Information (Detail) R$ / shares in Units, R$ in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 BRL (R$) R$ / shares | Dec. 31, 2018 BRL (R$) R$ / shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Net liability position | R$ 1,489.1 | R$ 1,726.1 |  |
Number of customer or group accounts for more than 10% of total revenue | 0 | 0 |  |
Investment plan | R$ 1,771.0 |  |  |
Cash, cash equivalents, and short-term financial investments | 5,205.6 |  |  |
Cash flow hedges gain (loss) | (29.1) | R$ 10.7 |  |
Notional amount of foreign exchange hedging instruments for highly probable future transactions designated as fair value hedge, related to notes in the foreign market | $ |  |  | $ 550.0 | $ 570.0
Unrealized loss of other comprehensive income, net of deferred income and social contribution taxes | 293.3 | (243.7) |  |
Notional amount of foreign exchange hedging instruments for highly probable future transactions designated as cash flow hedge, related to future sales revenues | $ |  |  | 60.0 | 149.4
Unrealized loss of other comprehensive income, net of deferred IRPJ and CSLL | 0.1 | 0.2 |  |
Balance of foreign exchange hedging instruments designated as net investments hedge in foreign entities | $ |  |  | $ 95.0 | $ 96.0
Unrealized loss of other comprehensive income, net of deferred income and social contribution taxes | R$ 55.7 | R$ (45.9) |  |
Maturity of foreign exchange hedging instruments | R$ / shares | R$ 5.76 | R$ 5.86 |  |
Later than one year [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Gross indebtedness | R$ 1,532.0 |  |  |
Scenario I [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Floating interest rate variation | 10.00% |  |  |
Likely scenario pre-fixed interest rate deterioration. | 10.00% |  |  |
Scenario II [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Floating interest rate variation | 25.00% |  |  |
Likely scenario pre-fixed interest rate deterioration. | 25.00% |  |  |
Scenario III [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Floating interest rate variation | 50.00% |  |  |
Likely scenario pre-fixed interest rate deterioration. | 50.00% |  |  |

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