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14. FINANCIAL INSTRUMENTS (Details 2) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 BRL (R$) Numnber shares | Dec. 31, 2019 BRL (R$) Numnber shares
Disclosure of detailed information about financial instruments [line items] |  |
Closing Balance | R$ 3,305,109 | R$ 2,114,620
Fair value adjustment recognized in profit or loss | R$ 1,190,489 | R$ (136,004)
USIM3 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Quantity (in shares) | shares | 107,156,651 | 107,156,651
Equity interest (%) | 15.19 | 15.19
Share price | Numnber | 15.69 | 9.87
Closing Balance | R$ 1,681,288 | R$ 1,057,636
Fair value adjustment recognized in profit or loss | R$ 623,652 | R$ (168,236)
USIM5 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Quantity (in shares) | shares | 111,144,456 | 111,144,456
Equity interest (%) | 20.29 | 20.29
Share price | Numnber | 14.61 | 9.51
Closing Balance | R$ 1,623,821 | R$ 1,056,984
Fair value adjustment recognized in profit or loss | R$ 566,837 | R$ 32,232
PATI3 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Quantity (in shares) | shares | 2,065,529 | 2,065,529
Equity interest (%) | 11.31 | 11.31
Share price | Numnber | 28.99 | 22.90
Closing Balance | R$ 59,879 | R$ 47,300
Fair value adjustment recognized in profit or loss | 12,579 | 17,224
Total shares [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Closing Balance | 3,364,988 | 2,161,920
Fair value adjustment recognized in profit or loss | R$ 1,203,068 | R$ (118,780)

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