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Shareholders' equity (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |  |
Translation adjustment on foreign subsidiaries | $ 79,357 | $ (184,446) | $ 81,413
Attributable to NEXA's shareholders | 1,002,934 | 813,930 |
Attributable to non-controlling interests | 286,629 | 246,363 |
Reserve Of Exchange Differences On Translation Including Non Controlling Interest [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Beginning balance, value | (375,913) | (191,467) | (272,880)
Translation adjustment on foreign subsidiaries | 79,357 | (184,446) | 81,413
Ending balance, value | (296,556) | (375,913) | (191,467)
Reserve Of Cash Flow Hedges Including Non Controlling Interest [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Beginning balance, value | 834 | 725 | 1,262
Cash flow hedge accounting, net of income tax | (3,801) | 109 | (537)
Ending balance, value | (2,967) | 834 | 725
Reserve of change in fair value of financial liability attributable to change in credit risk of liability [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Beginning balance, value | (18,357) | (16,064) | (14,213)
Changes in fair value of financial liabilities related to changes in the Company's own credit risk | (218) | (1,037) | (385)
Changes in fair value of investments in equity instruments | 126 | (1,256) | (1,466)
Ending balance, value | (18,449) | (18,357) | (16,064)
Accumulated Other Comprehensive Income Including Non Controlling Interest [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Beginning balance, value | (393,436) | (206,806) | (285,831)
Translation adjustment on foreign subsidiaries | 79,357 | (184,446) | 81,413
Cash flow hedge accounting, net of income tax | (3,801) | 109 | (537)
Changes in fair value of financial liabilities related to changes in the Company's own credit risk | (218) | (1,037) | (385)
Changes in fair value of investments in equity instruments | 126 | (1,256) | (1,466)
Ending balance, value | (317,972) | $ (393,436) | $ (206,806)
Attributable to NEXA's shareholders | (266,300) |  |
Attributable to non-controlling interests | $ (51,672) |  |

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- Definition The amount of accumulated items of income and expense (including reclassification adjustments) that are not recognised in profit or loss as required or permitted by other IFRSs. [Refer: IFRSs [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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