Shareholders' equity (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
IfrsStatementLineItems [Line Items]
Translation adjustment on foreign subsidiaries	$ (184,446)	$ 81,413	$ 64,460
Attributable to NEXA's shareholders	813,930	1,197,324
Attributable to non-controlling interests	246,363	254,713
Reserve Of Exchange Differences On Translation Including Non Controlling Interest [Member]
IfrsStatementLineItems [Line Items]
Beginning balance, value	(191,467)	(272,880)	(337,340)
Translation adjustment on foreign subsidiaries	(184,446)	81,413	64,460
Ending balance, value	(375,913)	(191,467)	(272,880)
Reserve Of Cash Flow Hedges Including Non Controlling Interest [Member]
IfrsStatementLineItems [Line Items]
Beginning balance, value	725	1,262	1,593
Cash flow hedge accounting	109	(537)	(331)
Ending balance, value	834	725	1,262
Reserve of change in fair value of financial liability attributable to change in credit risk of liability [member]
IfrsStatementLineItems [Line Items]
Beginning balance, value	(16,064)	(14,213)	(10,948)
Changes in fair value of financial liabilities related to changes in the Company's own credit risk	(1,037)	(385)	343
Changes in fair value of investments in equity instruments	(1,256)	(1,466)	(3,608)
Ending balance, value	(18,357)	(16,064)	(14,213)
Accumulated Other Comprehensive Income Including Non Controlling Interest [Member]
IfrsStatementLineItems [Line Items]
Beginning balance, value	(206,806)	(285,831)	(346,695)
Translation adjustment on foreign subsidiaries	(184,446)	81,413	64,460
Cash flow hedge accounting	109	(537)	(331)
Changes in fair value of financial liabilities related to changes in the Company's own credit risk	(1,037)	(385)	343
Changes in fair value of investments in equity instruments	(1,256)	(1,466)	(3,608)
Ending balance, value	(393,436)	$ (206,806)	$ (285,831)
Attributable to NEXA's shareholders	(335,565)
Attributable to non-controlling interests	$ (57,871)

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]

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

Name:	ifrs-full_AccumulatedOtherComprehensiveIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of equity attributable to the owners of the parent. This specifically excludes non-controlling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph r
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_r&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_EquityAttributableToOwnersOfParent
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Total for all subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 10
-IssueDate 2024-01-01
-Paragraph 22
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=10&code=ifrs-tx-2024-en-r&anchor=para_22&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 12
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_12_f&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph q
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_q&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_NoncontrollingInterests
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of other comprehensive income, net of tax, after reclassification adjustments, related to cash flow hedges. [Refer: Cash flow hedges [member]; 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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of other comprehensive income, net of tax, related to changes in the fair value of financial liabilities attributable to the changes in the credit risk of those liabilities. [Refer: Other comprehensive income; Credit risk [member]; Financial liabilities]

+ References

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiability
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of other comprehensive income, net of tax, after reclassification adjustments, related to exchange differences when financial statements of foreign operations are translated. [Refer: Other comprehensive income]

+ References

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of other comprehensive income, net of tax, related to gains (losses) on hedging instruments that hedge investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: Other comprehensive income]

+ References

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstruments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	nexa_IfrsStatementLineItems
Namespace Prefix:	nexa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=nexa_ReserveOfExchangeDifferencesOnTranslationIncludingNonControllingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=nexa_ReserveOfCashFlowHedgesIncludingNonControllingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=ifrs-full_ReserveOfChangeInFairValueOfFinancialLiabilityAttributableToChangeInCreditRiskOfLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=nexa_AccumulatedOtherComprehensiveIncomeIncludingNonControllingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: