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Other financial instruments (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Balance at the beginning of the year | $ (16,064) |
Changes in fair value | 81 | (15,663)
Foreign exchanges effects | 2,313 | (401)
Energy forward contracts (Megawatts) |  |
Balance at the end of the year | (13,670) | (16,064)
Notional [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Balance at the beginning of the year | 688,877 |
Changes in fair value |  |
Foreign exchanges effects |  |
Energy forward contracts (Megawatts) | 747,498 | 688,877
Balance at the end of the year | $ 747,498 | $ 688,877

X
- Definition The gains (losses) recognised in other comprehensive income on change in value of forward elements of forward contracts, net of tax, before reclassification adjustments. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 91 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_a&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_GainsLossesOnChangeInValueOfForwardElementsOfForwardContractsNetOfTax
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition A component of equity representing the accumulated change in the value of the forward elements of forward contracts when separating the forward element and spot element of a forward contract and designating as the hedging instrument only the changes in the spot element. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_e&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2024-01-01 -Paragraph 6.5.16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_6.5.16&doctype=Standard -URIDate 2024-03-27 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The element represents change in fair value. + References No definition available. + Details
Name: | nexa_ChangesInFairValue
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The element represents foreign exchange effect + References No definition available. + Details
Name: | nexa_ForeignExchangeEffect
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | nexa_IfrsStatementLineItems
Namespace Prefix: | nexa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ComponentsOfEquityAxis=nexa_NotionalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |