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Right-of-use assets and lease liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Cost, beginning | $ 111,562 | $ 55,608
Accumulated amortization, beginning | (36,744) | (28,610)
Balance at the beginning of the year | 74,818 | 26,998
New contracts | 64,955 | 68,428
Disposals and write-offs | (5,348) | (7,374)
Amortization | (36,189) | (16,935)
Remeasurement | 144 | 1,105
Foreign exchange effect | (13,115) | 2,710
Transfers |  | (114)
Balance at the end of the year | 85,265 | 74,818
Cost, ending | 157,708 | 111,562
Accumulated amortization, ending | (72,443) | (36,744)
Land and buildings [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost, beginning | 16,327 |
Accumulated amortization, beginning | (3,969) |
Balance at the beginning of the year | 12,358 |
New contracts | 16,500 |
Disposals and write-offs | (1,792) |
Amortization | (3,306) |
Remeasurement | (388) |
Foreign exchange effect | (1,867) |
Balance at the end of the year | 21,505 | 12,358
Cost, ending | 24,592 | 16,327
Accumulated amortization, ending | $ (3,087) | (3,969)
Average annual amortization rates % | 31.00% |
Machinery Equipment And Facilities [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost, beginning | $ 75,632 |
Accumulated amortization, beginning | (23,832) |
Balance at the beginning of the year | 51,800 |
New contracts | 43,569 |
Amortization | (28,001) |
Remeasurement | 532 |
Foreign exchange effect | (9,341) |
Balance at the end of the year | 58,559 | 51,800
Cost, ending | 119,566 | 75,632
Accumulated amortization, ending | $ (61,007) | (23,832)
Average annual amortization rates % | 34.00% |
IT Equipment [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost, beginning | $ 1,064 |
Accumulated amortization, beginning | (697) |
Balance at the beginning of the year | 367 |
New contracts | 293 |
Amortization | (263) |
Foreign exchange effect | (51) |
Balance at the end of the year | 346 | 367
Cost, ending | 910 | 1,064
Accumulated amortization, ending | $ (564) | (697)
Average annual amortization rates % | 33.00% |
Vehicles [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cost, beginning | $ 18,539 |
Accumulated amortization, beginning | (8,246) |
Balance at the beginning of the year | 10,293 |
New contracts | 4,593 |
Disposals and write-offs | (3,556) |
Amortization | (4,619) |
Foreign exchange effect | (1,856) |
Balance at the end of the year | 4,855 | 10,293
Cost, ending | 12,640 | 18,539
Accumulated amortization, ending | $ (7,785) | $ (8,246)
Average annual amortization rates % | 34.00% |

X
- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_a&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DepreciationRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The increase (decrease) in the revaluation surplus that relates to right-of-use assets. [Refer: Revaluation surplus; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 57 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_57&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RightofuseAssetsIncreaseDecreaseInRevaluationSurplus
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of amortization of right-of-use assets. [Refer: Depreciation and amortization expense; Right-of-use assets] + References No definition available. + Details
Name: | nexa_AmortizationOfRightofuseAssets
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The disclosure of average annual amortization rates. + References No definition available. + Details
Name: | nexa_AmortizationRateRightOfUseAssets
Namespace Prefix: | nexa_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of disposals of right-of-use assets. [Refer: Disposals And Write-Offs; Right-of-use assets] + References No definition available. + Details
Name: | nexa_DisposalsAndWriteOffsRightofuseAssets
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The element represents foreign exchange effect right of use assets. + References No definition available. + Details
Name: | nexa_ForeignExchangeEffectRightOfUseAssets
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 amount of accumulated amortization. + References No definition available. + Details
Name: | nexa_RightofuseAssetsAccumulatedAmortization
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total cost associated with the right-of-use asstes. + References No definition available. + Details
Name: | nexa_RightofuseAssetsCost
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of disposals of right-of-use assets. [Refer: Transfers; Right-of-use assets] + References No definition available. + Details
Name: | nexa_TransfersRightOfUseAssets
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_LandAndBuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=nexa_MachineryEquipmentAndFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=nexa_ITEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |