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Other operating income, net - Other operating income, net (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Summary of other operating income net [line items] |  |  |  |
Other operating income, net |  | R$ 221,394 | R$ 179,625 | R$ 57,533
Commercial partnerships [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [1] | 24,367 | 40,816 | 53,671
Merchandising [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [2] | 29,672 | 44,396 | 52,092
Loyalty Program [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [3] | 145 | 12,943 | 25,682
Ultracargo fire accident in Santos [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [4] |  | (3,733) | (4,951)
Fine for unrealized acquisition [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [5] |  |  | (286,160)
Extraordinary tax credits [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [6] | 292,977 | 144,949 | 208,038
Conduct adjustment commitment – Tequimar [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [7] |  | (65,539) |
Provision for decarbonization obligation [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net | [8] | (124,287) |  |
Others [member] |  |  |  |
Summary of other operating income net [line items] |  |  |  |
Other operating income, net |  | R$ (1,480) | R$ 5,793 | R$ 9,161
[1] | Refers to contracts with service providers and suppliers,which establish trade agreementsforconvenience stores and gas stations.
[2] | Refers to contracts with suppliers of convenience stores,which establish, among other agreements, promotional campaigns.
[3] | Refers to sales of “Km deVantagens” to partners of the loyalty program. Revenue is recognized at the time that the partners transferthe points to theircustomers.
[4] | For more informationabout the fire accident inUltracargo, see Note22.b.2.4.
[5] | Refers to a contractual fine paid in2018byCia.Ultragazin favor ofPetrobrasdue to the non-closing of the acquisition ofLiquigásDistribuidoraS.A (“Liquigás”) transaction rejected by the CADE.
[6] | ReferssubstantiallytoOxitenoS.A.,Ipiranga,Oleoquímica, EMCA,Tequimar,Ultracargoand TropicalPIS and COFINScredits (see Note7.a.2), and2019substantially toExtrafarma,Ipirangaand Iconic credits.
[7] | For more information, see Note22.b.2.4.
[8] | Refers to theobligationadopted by the Brazilian NationalBiofuelsPolicy – "RenovaBio"(implemented by Law No.13,576/2017, with additional regulations established by Decree No.9,888/2019and Ordinance No.419of November 20, 2019 issued by the Brazilian Ministry of Mines and Energy) to setdecarbonizationtargets for its sector.

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