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Supplementary information on Oil and Gas Exploration and Production (unaudited) (Details 6) - bbl bbl in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 11,386 | 10,921 | 10,473
Net develop proved developed reserves |  | 5,727 | 5,125
Net Proved Undeveloped reserves | 5,514 | 5,194 | 5,348
Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 5,858 | 5,711 | 5,110
Net Proved Undeveloped reserves | 5,514 | 5,193 | 5,346
Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 14 | 15 | 15
Total Consolidated And Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 5,872 |  |
Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 2 | 2
Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 5,843 | 5,694 | 5,093
Net Proved Undeveloped reserves | 5,497 | 5,179 | 5,330
South America Outside Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 15 | 17 | 17
Net Proved Undeveloped reserves | 17 | 13 | 15
North America One [Member] | Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 14 | 15 | 15
North America One [Member] | Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 2 | 2
Crude Oil 1 [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 9,649 | 9,228 | 8,926
Net develop proved developed reserves | 4,898 | 4,726 | 4,200
Net Proved Undeveloped reserves | 4,751 | 4,503 | 4,726
Crude Oil 1 [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 4,885 | 4,711 | 4,186
Net Proved Undeveloped reserves | 4,751 | 4,501 | 4,724
Crude Oil 1 [Member] | Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 13 | 14 | 14
Crude Oil 1 [Member] | Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 2 | 2
Crude Oil 1 [Member] | Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 4,884 | 4,710 | 4,185
Net Proved Undeveloped reserves | 4,750 | 4,500 | 4,723
Crude Oil 1 [Member] | South America Outside Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 1 | 1 | 1
Net Proved Undeveloped reserves | 1 | 1 | 1
Crude Oil 1 [Member] | North America One [Member] | Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 13 | 14 | 14
Crude Oil 1 [Member] | North America One [Member] | Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 2 | 2
Natural Gas [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 9,752 | 9,504 | 8,683
Net develop proved developed reserves | 5,469 | 5,620 | 5,193
Net Proved Undeveloped reserves | 4,283 | 3,885 | 3,490
Natural Gas [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 5,467 | 5,614 | 5,188
Net Proved Undeveloped reserves | 4,283 | 3,884 | 3,489
Natural Gas [Member] | Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 2 | 6 | 5
Natural Gas [Member] | Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 1 | 1
Natural Gas [Member] | Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 5,387 | 5,522 | 5,097
Net Proved Undeveloped reserves | 4,194 | 3,814 | 3,407
Natural Gas [Member] | South America Outside Country Of Brazil [Member] | Total Consolidated Entities [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved developed reserves | 80 | 92 | 91
Net Proved Undeveloped reserves | 89 | 70 | 82
Natural Gas [Member] | North America One [Member] | Total Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net develop proved developed reserves | 2 | 6 | 5
Natural Gas [Member] | North America One [Member] | Equity Method Investees [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net Proved Undeveloped reserves |  | 1 | 1

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