XML 202 R192.htm IDEA: XBRL DOCUMENT
v3.26.1

Revenue - Summary of Revenue Disaggregated by Types of Revenue and Timing of Revenue Recognition (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | ₩ 68,986,938 | ₩ 73,459,408 | ₩ 77,056,549
Revenue from construction contracts | 5,193,949 |  |
Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 59,702,284 | 60,903,559 | 64,201,433
Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,510,262 | 4,124,633 | 4,421,234
Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 5,398,897 | 8,078,050 | 8,106,524
Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 375,495 | 353,166 | 327,358
Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 60,137,828 | 62,518,570 | 64,886,449
Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 8,849,110 | 10,940,838 | 12,170,100
Steel [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 37,284,859 | 39,104,095 | 40,393,273
Steel [member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 36,276,548 | 38,049,273 | 39,435,236
Steel [member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 852,575 | 889,556 | 807,142
Steel [member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 0 | 0 | 0
Steel [member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 155,736 | 165,266 | 150,895
Steel [member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 36,432,284 | 38,214,539 | 39,586,131
Steel [member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 852,575 | 889,556 | 807,142
Trading [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 23,744,104 | 22,803,773 | 24,033,506
Trading [member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 21,387,183 | 20,059,155 | 20,973,059
Trading [member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,259,069 | 2,736,866 | 3,056,272
Trading [member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 0 | 0 | 0
Trading [member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 97,852 | 7,752 | 4,175
Trading [member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 21,485,035 | 20,066,907 | 20,977,234
Trading [member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,259,069 | 2,736,866 | 3,056,272
Construction [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 5,507,477 | 8,244,271 | 8,230,482
Construction [member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 0 | 0 | 0
Construction [member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 131,558 | 127,572 | 142,902
Construction [member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 5,355,413 | 8,052,414 | 8,070,120
Construction [member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 20,506 | 64,285 | 17,460
Construction [member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 80,554 | 1,326,130 | 375,118
Construction [member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 5,426,923 | 6,918,141 | 7,855,364
Logistics and Others [Member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 308,698 | 421,742 | 470,613
Logistics and Others [Member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 1,174 | 11,894 | 17,923
Logistics and Others [Member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 259,477 | 363,384 | 397,421
Logistics and Others [Member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 0 | 0 | 0
Logistics and Others [Member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 48,047 | 46,464 | 55,269
Logistics and Others [Member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 49,221 | 58,358 | 73,192
Logistics and Others [Member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 259,477 | 363,384 | 397,421
Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 45,482 | 72,978 | 112,633
Others [member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 759 | 0 | 0
Others [member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,803 | 3,579 | 13,082
Others [member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 0 | 0 | 0
Others [member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 40,920 | 69,399 | 99,551
Others [member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 41,680 | 69,399 | 99,551
Others [member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,802 | 3,579 | 13,082
Rechargeable Battery Materials [Member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,096,318 | 2,812,549 | 3,816,042
Rechargeable Battery Materials [Member] | Revenue from sales of goods [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,036,620 | 2,783,237 | 3,775,215
Rechargeable Battery Materials [Member] | Revenue from services [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 3,780 | 3,676 | 4,415
Rechargeable Battery Materials [Member] | Revenue from construction contract [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 43,484 | 25,636 | 36,404
Rechargeable Battery Materials [Member] | Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 12,434 | 0 | 8
Rechargeable Battery Materials [Member] | Revenue recognized at a point in time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | 2,049,054 | 2,783,237 | 3,775,223
Rechargeable Battery Materials [Member] | Revenue recognized over time [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue | ₩ 47,264 | ₩ 29,312 | ₩ 40,819

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_RevenueFromConstructionContracts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&anchor=para_114&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&anchor=para_113_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_103&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_103&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_RevenueFromContractsWithCustomers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=pkx_SalesOfGoodsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=pkx_ServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=pkx_ConstructionContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=pkx_OthersServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TimingOfTransferOfGoodsOrServicesAxis=ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TimingOfTransferOfGoodsOrServicesAxis=ifrs-full_GoodsOrServicesTransferredOverTimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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