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FINANCIAL INSTRUMENTS - Liquidity risk (Details) - Liquidity risk - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | R$ 30,977,914 | R$ 32,800,346
Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 11,806,631 | 9,377,095
1-3 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 3,043,551 | 5,724,459
4-5 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 2,419,579 | 3,563,916
2026 |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 13,708,153 | 14,134,876
Liabilities, Trade accounts payable |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 8,017,140 | 5,437,953
Liabilities, Trade accounts payable | Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 8,017,140 | 5,437,953
Liabilities, Loans and Financing |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 17,885,671 | 21,962,204
Liabilities, Loans and Financing | Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 851,225 | 2,131,402
Liabilities, Loans and Financing | 1-3 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 2,227,608 | 3,465,577
Liabilities, Loans and Financing | 4-5 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 2,308,361 | 3,531,312
Liabilities, Loans and Financing | 2026 |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 12,498,477 | 12,833,913
Liabilities, Debentures |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 3,492,689 | 3,077,960
Liabilities, Debentures | Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 1,802,373 | 66,145
Liabilities, Debentures | 1-3 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 780,537 | 2,174,184
Liabilities, Debentures | 4-5 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 111,218 | 32,604
Liabilities, Debentures | 2026 |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 798,561 | 805,027
Liabilities, Related parties |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 24,648 | 22,855
Liabilities, Related parties | 2026 |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 24,648 | 22,855
Liabilities, Obligation with FIDC |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 45,497 | 987,406
Liabilities, Obligation with FIDC | Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 45,497 | 944,513
Liabilities, Obligation with FIDC | 1-3 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations |  | 42,893
Liabilities, Other current liabilities |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 1,090,396 | 797,082
Liabilities, Other current liabilities | Less than 1 year |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 1,090,396 | 797,082
Liabilities, Other non-current liabilities |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 421,873 | 514,886
Liabilities, Other non-current liabilities | 1-3 years |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | 35,406 | 41,805
Liabilities, Other non-current liabilities | 2026 |  |
Disclosure of maturity analysis for financial liabilities held for managing liquidity risk |  |
Contractual obligations | R$ 386,467 | R$ 473,081

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