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Inventory (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Disclosure Inventory Abstract |  |
Balance at the beginning of the year | $ (39,717) | $ (38,510)
Additions | (41,333) | (30,258)
Reversals | 28,871 | 21,663
Foreign exchange gains (losses) | (2,006) | 5,445
Divestments |  | 1,943
Balance at the end of year | $ (54,185) | $ (39,717)

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

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- Definition The amount is related to divestments in some mining operations. + References No definition available. + Details
Name: | nexa_DivestmentsOfInventoryProvision
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount is related to the exchange variation of inventory provisions. + References No definition available. + Details
Name: | nexa_ForeignExchangeGainsOfInventoryProvision
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The element represents inventory provisions. + References No definition available. + Details
Name: | nexa_InventoryProvisions
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The element represents provision for inventories additions. + References No definition available. + Details
Name: | nexa_ProvisionForInventoriesAdditions
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount is related to the reversal of the net realizable value provision. + References No definition available. + Details
Name: | nexa_ReversalOfInventoryProvision
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration