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v3.26.1

Information by business segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | $ 3,002,055 | $ 2,766,481 | $ 2,573,233
Cost of sales | 2,289,159 | 2,228,410 | 2,274,357
Gross profit | 712,896 | 538,071 | 298,876
Impairment loss of long-lived assets | (91,706) | 32,870 | 114,643
Other income and expenses, net | (79,483) | (33,511) | (110,584)
Adjusted EBITDA | 771,879 | 714,080 | 406,041
Change in fair value of energy forward contracts | 9,608 | 81 | (15,663)
Share in the results of associates | 21,143 | 21,223 | 23,536
(Loss) income before income tax | 331,749 | (71,851) | (296,084)
Other restoration obligations |  |  | 6,960
Divestment and restructuring | (7,736) | (9,028) |
Operating segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | 3,002,055 | 2,766,481 | 2,573,233
Cost of sales | (2,289,159) | (2,228,410) | (2,274,357)
Gross profit | 712,896 | 538,071 | 298,876
Selling, general and administrative | (145,452) | (127,328) | (126,599)
Mineral exploration and project evaluation | (81,696) | (67,976) | (99,612)
Impairment loss of long-lived assets | 91,706 | (32,870) | (114,643)
Other income and expenses, net | (79,483) | (33,511) | (110,584)
Operating (loss) income | 497,971 | 276,386 | (152,562)
Depreciation and amortization | 288,996 | 330,198 | 310,475
Miscellaneous adjustments | (15,088) | 107,496 | 248,128
Adjusted EBITDA | 771,879 | 714,080 | 406,041
Operating segments [member] | Mining Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | 1,569,883 | 1,349,666 | 1,090,276
Cost of sales | (938,273) | (1,011,742) | (1,026,178)
Gross profit | 631,610 | 337,924 | 64,098
Selling, general and administrative | (73,365) | (66,307) | (61,690)
Mineral exploration and project evaluation | (75,804) | (60,939) | (90,238)
Impairment loss of long-lived assets | 91,706 | (32,870) | (109,347)
Other income and expenses, net | (87,752) | (41,714) | (67,876)
Operating (loss) income | 486,395 | 136,094 | (265,053)
Depreciation and amortization | 189,670 | 243,111 | 229,153
Miscellaneous adjustments | (17,771) | 84,866 | 196,529
Adjusted EBITDA | 658,292 | 464,071 | 160,629
Operating segments [member] | Smelting Segment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | 2,057,071 | 1,997,341 | 1,946,661
Cost of sales | (1,975,060) | (1,799,773) | (1,726,271)
Gross profit | 82,011 | 197,568 | 220,390
Selling, general and administrative | (72,158) | (57,197) | (61,097)
Mineral exploration and project evaluation | (6,561) | (7,887) | (9,374)
Impairment loss of long-lived assets |  |  | (5,296)
Other income and expenses, net | 11,859 | 7,984 | (26,412)
Operating (loss) income | 15,151 | 140,468 | 118,211
Depreciation and amortization | 95,497 | 86,458 | 80,471
Miscellaneous adjustments | 2,683 | 22,630 | 51,599
Adjusted EBITDA | 113,332 | 249,556 | 250,281
Operating segments [member] | Adjustment [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment loss of long-lived assets | 91,706 | (32,870) | (114,643)
Miscellaneous adjustments | 15,088 | (107,496) | (248,128)
Changes in fair value of offtake agreement | (44,243) | (102) | 2,268
Loss on sale of property, plant and equipment | (1,649) | (16,183) | (3,734)
Asset retirement obligations remeasurement estimate | (7,710) |  |
Change in fair value of energy forward contracts | 9,608 | 81 | (15,663)
Reversal of other restoration obligations | 8,112 |  |
Divestment and restructuring gains | 7,736 |  |
Dividends received in cash | (23,835) | (25,185) |
Remeasurement adjustment of streaming agreement | (24,637) | (21,084) | (10,121)
Depreciation and amortization | (288,996) | (330,198) | (310,475)
Share in the results of associates | 21,143 | 21,223 | 23,536
Net financial results | (187,365) | (369,460) | (167,058)
(Loss) income before income tax | 331,749 | (71,851) | (296,084)
Impairment of other assets |  | (307) |
Aripuana ramp up impacts |  | (25,158) | (15,494)
Asset retirement obligations remeasurement estimate |  | 5,310 | 3,125
Other restoration obligations |  | (1,026) | (6,960)
Divestment and restructuring |  | 9,028 |
Tax voluntary disclosure |  |  | (86,906)
Elimination of intersegment amounts [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | (669,298) | (604,034) | (468,250)
Cost of sales | 669,298 | 604,034 | 468,250
Material reconciling items [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Net revenues | 44,399 | 23,508 | 4,546
Cost of sales | (45,124) | (20,929) | 9,842
Gross profit | (725) | 2,579 | 14,388
Selling, general and administrative | 71 | (3,824) | (3,812)
Mineral exploration and project evaluation | 670 | 850 |
Other income and expenses, net | (3,590) | 219 | (16,296)
Operating (loss) income | (3,574) | (176) | (5,720)
Depreciation and amortization | 3,829 | 629 | 851
Adjusted EBITDA | $ 255 | $ 453 | $ (4,869)

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- Definition The amount of other comprehensive income, before tax, resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 135 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_135_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The element represents ramp-up expenses of greenfield projects Aripuana. + References No definition available. + Details
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- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References No definition available. + Details
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- Definition The element represents provision of other restoration obligations. + References No definition available. + Details
Name: | nexa_ReversalOfOtherRestorationObligations
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of expense relating to selling, general and administrative activities of the entity. + References No definition available. + Details
Name: | nexa_SellingGeneralAndAdministrationExpense
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The element represents provision of Tax Voluntary Disclosure. + References No definition available. + Details
Name: | nexa_TaxVoluntaryDisclosure
Namespace Prefix: | nexa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=ifrs-full_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=nexa_MiningSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=nexa_SmeltingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=nexa_AdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=ifrs-full_EliminationOfIntersegmentAmountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=ifrs-full_MaterialReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |