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14. FINANCIAL INSTRUMENTS (Details 11) - Foreign exchange risk [member] R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 BRL (R$) Numnber
Disclosure of detailed information about financial instruments [line items] |  |
Designated amounts | R$ 120,000 |
Cash flow hedges [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designated amounts | 5,828,806 |
Amortized part | (1,836,606) |
Effect on Result | (1,667,886) | [1]
Impact on Shareholders' equity | R$ (5,125,058) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 12/18/2014 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | May 2020 |
Exchange rate on designation | Numnber | 2.6805 |
Designated amounts | R$ 30,000 |
Amortized part | (30,000) |
Effect on Result | (82,374) | [1]
Impact on Shareholders' equity |  |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 12/18/2014 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | May 2020 |
Exchange rate on designation | Numnber | 2.678 |
Designated amounts | R$ 35,000 |
Amortized part | (35,000) |
Effect on Result | (96,190) | [1]
Impact on Shareholders' equity |  |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 12/18/2014 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | May 2020 |
Exchange rate on designation | Numnber | 2.676 |
Designated amounts | R$ 35,000 |
Amortized part | (35,000) |
Effect on Result | (96,261) | [1]
Impact on Shareholders' equity |  |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/21/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | July 2019 - March 2021 |
Exchange rate on designation | Numnber | 3.1813 |
Designated amounts | R$ 60,000 |
Amortized part | (45,000) |
Effect on Result | (58,475) | [1]
Impact on Shareholders' equity | R$ (30,231) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/23/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | July 2019 - March 2021 |
Exchange rate on designation | Numnber | 3.285 |
Designated amounts | R$ 100,000 |
Amortized part | (75,000) |
Effect on Result | (92,026) | [1]
Impact on Shareholders' equity | R$ (47,793) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/23/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.285 |
Designated amounts | R$ 30,000 |
Amortized part | (18,000) |
Effect on Result | (14,185) | [1]
Impact on Shareholders' equity | R$ (22,940) |
Cash flow hedges [member] | Export pepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/24/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.3254 |
Designated amounts | R$ 100,000 |
Amortized part | (60,000) |
Effect on Result | (46,474) | [1]
Impact on Shareholders' equity | R$ (74,852) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/27/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.3557 |
Designated amounts | R$ 25,000 |
Amortized part | (15,000) |
Effect on Result | (11,467) | [1]
Impact on Shareholders' equity | R$ (18,410) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/27/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.3557 |
Designated amounts | R$ 70,000 |
Amortized part | (42,000) |
Effect on Result | (32,108) | [1]
Impact on Shareholders' equity | R$ (51,548) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/27/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.3557 |
Designated amounts | R$ 30,000 |
Amortized part | (18,000) |
Effect on Result | (13,760) | [1]
Impact on Shareholders' equity | R$ (22,092) |
Cash flow hedges [member] | Export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/28/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | August 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.3815 |
Designated amounts | R$ 30,000 |
Amortized part | (18,000) |
Effect on Result | (13,605) | [1]
Impact on Shareholders' equity | R$ (21,782) |
Cash flow hedges [member] | Export Prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 3/8/2015 |
Hedging instrument | Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | July 2018 - October 2022 |
Exchange rate on designation | Numnber | 3.394 |
Designated amounts | R$ 355,000 |
Amortized part | (276,500) |
Effect on Result | (338,777) | [1]
Impact on Shareholders' equity | R$ (141,512) |
Cash flow hedges [member] | Bonds [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 2/4/2018 |
Hedging instrument | Bonds |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | July 2018 - February 2023 |
Exchange rate on designation | Numnber | 3.3104 |
Designated amounts | R$ 1,170,045 |
Amortized part | (820,045) |
Effect on Result | (306,189) | [1]
Impact on Shareholders' equity | R$ (660,205) |
Cash flow hedges [member] | Bonds and export prepayments in us$ [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 7/31/2019 |
Hedging instrument | Bonds and Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | January 2020 - April 2026 |
Exchange rate on designation | Numnber | 3.7649 |
Designated amounts | R$ 1,342,761 |
Amortized part | (247,061) |
Effect on Result | (329,966) | [1]
Impact on Shareholders' equity | R$ (1,568,823) |
Cash flow hedges [member] | Bonds without express maturity and export prepayments in us$ to third parties [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 10/1/2020 |
Hedging instrument | Bonds without express maturity and Export prepayments in US$ to third parties |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | March 2020 - December 2050 |
Exchange rate on designation | Numnber | 4.0745 |
Designated amounts | R$ 1,416,000 |
Amortized part | (102,000) |
Effect on Result | (136,029) | [1]
Impact on Shareholders' equity | R$ (1,474,571) |
Cash flow hedges [member] | Bond [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Designation date | 1/28/2020 |
Hedging instrument | Bonds |
Hedged item | Part of the highly probable future monthly iron ore exports |
Type of hedged risk | Foreign exchange - R$ vs. US$ spot rate |
Hedged period | March 2017 - January 2028 |
Exchange rate on designation | Numnber | 4.2064 |
Designated amounts | R$ 1,000,000 |
Amortized part |  |
Effect on Result |  | [1]
Impact on Shareholders' equity | R$ (990,299) |
[1] | On December 31, 2020, the amount of (R$1,667,886) was recorded in Other Operating Expenses. As of December 31, 2019, (R$790,353).

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