The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

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The interest rate on borrowings. [Refer: Borrowings]

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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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No definition available.

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The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The cash inflow from borrowings obtained. [Refer: Borrowings]

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The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Liquidity Risk (Details) R$ in Thousands				12 Months Ended
	Mar. 30, 2020 USD ($)	Mar. 30, 2020 BRL (R$)	Feb. 14, 2020 BRL (R$)	Dec. 31, 2020 BRL (R$)	Dec. 31, 2019 BRL (R$)	Dec. 31, 2018 BRL (R$)	Feb. 28, 2020 USD ($)	Feb. 14, 2020 USD ($)	Feb. 14, 2020 BRL (R$)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Disbursements received \| R$				R$ 14,761,796	R$ 18,993,837	R$ 25,645,822
Liquidity risk \| Export prepayment ("PPE") \| Settlement of EPP, Maturity February 14, 2023
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Principle amount \| $								$ 750,000,000
Transaction amount settled \| R$			R$ 3,240,229
Liquidity risk \| Export prepayment ("PPE") \| Settlement of EPP, Maturity February 14, 2023 \| LIBOR
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Interest rate adjustment								1.15%	1.15%
Interest rate basis			1.15% p.a. plus quarterly LIBOR
Liquidity risk \| Export prepayment ("PPE") \| New EPP transaction, Maturity February 13, 2026
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Principle amount								$ 850,000	R$ 3,672,259
Liquidity risk \| Export prepayment ("PPE") \| New EPP transaction, Maturity February 13, 2026 \| LIBOR
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Interest rate adjustment								1.15%	1.15%
Interest rate basis			1.15% p.a. plus quarterly LIBOR
Liquidity risk \| Make-whole Senior Notes ("Notes 2021") \| LIBOR
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Principle amount \| $							$ 189,630,000
Interest rate							5.875%
Liquidity risk \| Revolving credit facility
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Disbursements received	$ 500,000,000	R$ 2,638,221
Liquidity risk \| Revolving credit facility \| LIBOR
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Interest rate adjustment	1.30%	1.30%
Interest rate basis	1.30% plus quarterly LIBOR	1.30% plus quarterly LIBOR