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Risks and Financial Instruments - Fair values and the carrying values of the financial instruments (Detail) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Summary of risks and financial instruments [line items]
Financial assets, carrying value	R$ 13,031,666	R$ 10,202,534
Financial assets, fair value	13,007,571	10,214,435
Financial liabilities, carrying value	23,336,595	18,812,123
Financial liabilities, fair value	R$ 23,998,204	19,997,517
Cash and bank [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial assets, carrying value	R$ 405,081	284,992
Financial assets, fair value	R$ 405,081	284,992
Financial investments local currency [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through other comprehensive income
Financial assets, carrying value	R$ 2,241,852	1,780,939
Financial assets, fair value	R$ 2,241,852	1,780,939
Financial investments foreign currency [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial assets, carrying value	R$ 14,561	49,448
Financial assets, fair value	R$ 14,561	49,448
Fixed income securities local currency1 [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial assets, carrying value	R$ 3,643,286	1,937,967
Financial assets, fair value	R$ 3,643,286	1,937,967
Fixed income securities local currency2 [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through other comprehensive income
Financial assets, carrying value	R$ 31,315	595,816
Financial assets, fair value	R$ 31,315	595,816
Fixed income securities local currency3 [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial assets, carrying value	R$ 75,251	76,904
Financial assets, fair value	R$ 75,251	76,904
Fixed income securities foreign currency [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through other comprehensive income
Financial assets, carrying value	R$ 1,278,940	303,417
Financial assets, fair value	R$ 1,278,940	303,417
Currency interest rate hedging instruments [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial assets, carrying value	R$ 981,874	682,615
Financial assets, fair value	R$ 981,874	682,615
Trade receivables [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial assets, carrying value	R$ 3,391,122	3,689,500
Financial assets, fair value	R$ 3,369,766	3,663,247
Reseller financing [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial assets, carrying value	R$ 968,384	800,936
Financial assets, fair value	R$ 965,645	839,090
Financing [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial liabilities, carrying value	R$ 1,308,928	1,666,092
Financial liabilities, fair value	R$ 1,308,928	1,666,092
Financing [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial liabilities, carrying value	R$ 9,406,013	6,008,414
Financial liabilities, fair value	R$ 10,186,947	7,268,742
Debentures [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial liabilities, carrying value	R$ 5,450,751	5,657,339
Financial liabilities, fair value	R$ 5,363,621	5,603,669
Debentures 1 [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial liabilities, carrying value	R$ 1,093,365	1,030,892
Financial liabilities, fair value	R$ 1,093,365	1,030,891
Lease payable [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial liabilities, carrying value	R$ 1,833,288	1,588,673
Financial liabilities, fair value	R$ 1,833,288	1,588,673
Commodities currency and interest rate hedging instruments [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial assets, fair value	R$ 981,874	682,615
Financial liabilities, carrying value	117,159	29,985
Financial liabilities, fair value	R$ 117,159	29,985
Trade payable [member]
Summary of risks and financial instruments [line items]
Category	Measured at amortized cost
Financial liabilities, carrying value	R$ 4,040,652	2,700,071
Financial liabilities, fair value	R$ 4,008,457	2,678,808
Subscription warrants indemnification [member]
Summary of risks and financial instruments [line items]
Category	Measured at fair value through profit or loss
Financial liabilities, carrying value	R$ 86,439	130,657
Financial liabilities, fair value	R$ 86,439	R$ 130,657

X

- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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