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Investment - Summary of Balances and Changes in Joint Ventures (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | R$ 153,076 | R$ 101,954 | R$ 122,061
Capital increase |  | 29,203 | 79,124 | 31,908
Capital reduction | [1] | (363) |  |
Capital reduction |  |  |  | 1,250
Valuation adjustments |  | 1,065 | (7,771) | (3,704)
Dividends and interest on equity (gross) |  | (165) | (5,769) | (32,065)
Share of profit (loss) of joint ventures |  | (45,812) | (14,462) | (16,246)
Transfer to provision for short-term liabilities |  | 2,096 |  |
Joint ventures, ending |  | 139,100 | 153,076 | 101,954
Uniao vopak [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 7,342 | 7,446 | 6,096
Capital increase |  | 0 | 0 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | (1,474) | 0
Share of profit (loss) of joint ventures |  | 392 | 1,370 | 1,350
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 7,734 | 7,342 | 7,446
Rpr [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 18,792 | 20,118 | 54,739
Capital increase |  | 0 | 0 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 1,065 | (7,771) | (3,704)
Dividends and interest on equity (gross) |  | (165) | (4,295) | (32,065)
Share of profit (loss) of joint ventures |  | (21,788) | 10,740 | 1,148
Transfer to provision for short-term liabilities |  | 2,096 |  |
Joint ventures, ending |  | 0 | 18,792 | 20,118
Connect car [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 82,818 | 74,390 | 61,226
Capital increase |  | 20,000 | 35,000 | 31,908
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | (21,638) | (26,572) | (18,744)
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 81,180 | 82,818 | 74,390
Latitude Logística [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 10,351 | 0 | 0
Capital increase |  | 0 | 10,351 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | 0 | 0 | 0
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 10,351 | 10,351 | 0
Navegantes Logística [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 23,581 | 0 | 0
Capital increase |  | 0 | 23,581 | 0
Capital reduction | [1] | (363) |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | (1,594) | 0 | 0
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 21,624 | 23,581 | 0
Nordeste Logística I [Member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 1,930 | 0 | 0
Capital increase |  | 303 | 1,930 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | (1,409) | 0 | 0
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 824 | 1,930 | 0
Nordeste Logística II [Member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 4,183 | 0 | 0
Capital increase |  | 3,894 | 4,183 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | (401) | 0 | 0
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | 7,676 | 4,183 | 0
Nordeste Logística III [Member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Joint ventures, beginning |  | 4,079 | 0 | 0
Capital increase |  | 5,006 | 4,079 | 0
Capital reduction |  | 0 |  |
Valuation adjustments |  | 0 | 0 | 0
Dividends and interest on equity (gross) |  | 0 | 0 | 0
Share of profit (loss) of joint ventures |  | 626 | 0 | 0
Transfer to provision for short-term liabilities |  | 0 |  |
Joint ventures, ending |  | R$ 9,711 | R$ 4,079 | R$ 0
[1] | Refers to reimbursement of expenses that preceded the port auctions and that were apportioned among the members of the consortium.

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