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v3.26.1

Other financial instruments (Details 5) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
IfrsStatementLineItems [Line Items] |  |
Balance at the beginning of the year | $ (19,666) | $ (19,565)
Changes in fair value | (49,254) | (3,347)
Deliveries of copper concentrates |  |
Price cap realized | 5,011 | 3,246
Balance at the end of the year | (63,909) | (19,666)
Notional [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Balance at the beginning of the year | 22,288 | 27,562
Changes in fair value |  |
Deliveries of copper concentrates | (3,626) | (5,274)
Price cap realized |  |
Balance at the end of the year | $ 18,662 | $ 22,288

X
- Definition The element represents fair value of offtake agreement measured in the begining of the year. + References No definition available. + Details
Name: | nexa_ChangesInFairValueMeasurement
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The element represents changes in fair value during the year. + References No definition available. + Details
Name: | nexa_ChangesInFairValues
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The element represents the amount of deliveries of copper concentrates in relation of offtake agreement. + References No definition available. + Details
Name: | nexa_DeliveriesOfCopperConcentrates
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The element represents sales with the copper price higher than the price cap, therefore resulting in the reduction of the financial instrument liability for these sales, and the recognition of revenue at fair values. + References No definition available. + Details
Name: | nexa_PriceCapRealized
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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