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FINANCIAL INSTRUMENTS - Changes in liabilities from Cash Flow from financing activities (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Related parties, net |  |  |
Changes in liabilities from Cash flow from financing activities |  |  |
Beginning of year | R$ (111,499) | R$ (95,445) | R$ (26,589)
Cash transactions |  |  |
Proceeds/(Repayment) from financing activities | 139,556 | (7,777) | (64,089)
Non cash transactions |  |  |
Interest expense on loans and Interest on loans with related parties | (6,089) | (8,277) | (4,767)
Exchange variation and others | 2 |  |
End of year | 21,970 | (111,499) | (95,445)
Leasing payable |  |  |
Changes in liabilities from Cash flow from financing activities |  |  |
Beginning of year | 856,474 | 804,269 | 836,368
Cash transactions |  |  |
Proceeds/(Repayment) from financing activities | (275,944) | (247,914) | (161,824)
Interest paid on loans and financing | (68,699) | (61,727) | (83,620)
Non cash transactions |  |  |
Interest expense on loans and Interest on loans with related parties | 68,699 | 61,727 | 83,620
Exchange variation and others | 337,835 | 300,119 | 129,725
End of year | 918,365 | 856,474 | 804,269
Debt, Debentures and Losses/Gains on financial instruments, net - Derivative instruments |  |  |
Changes in liabilities from Cash flow from financing activities |  |  |
Beginning of year | 17,516,322 | 16,047,021 | 14,878,542
Cash transactions |  |  |
Proceeds/(Repayment) from financing activities | (4,506,918) | (1,963,283) | 700,490
Interest paid on loans and financing | (1,100,826) | (1,079,981) | (945,027)
Non cash transactions |  |  |
Interest expense on loans and Interest on loans with related parties | 1,059,841 | 1,022,460 | 938,120
Exchange variation and others | 1,068,028 | 3,490,105 | 474,896
End of year | R$ 14,036,447 | R$ 17,516,322 | R$ 16,047,021

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- Definition The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 44B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_44B_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in liabilities arising from financing activities resulting from financing cash flows. [Refer: Cash flows from (used in) financing activities; Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 44B -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_44B_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities for which cash flows were, or future cash flows will be, classified in the statement of cash flows as cash flows from financing activities. [Refer: Cash flows from (used in) financing activities; Liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 44D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_44D&doctype=Standard -URIDate 2021-03-24 + Details
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