XML 251 R241.htm IDEA: XBRL DOCUMENT
v3.26.1

Operating Segments - Information about Reportable Segments (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | ₩ 68,986,938 | ₩ 73,459,408 | ₩ 77,056,549
Interest income |  | 533,307 | 576,782 | 502,147
Interest expenses |  | (1,091,462) | (1,051,511) | (1,001,290)
Depreciation and amortization |  | (4,159,223) | (3,984,460) | (3,823,280)
Impairment loss on property, plant and equipment and others |  | (194,984) | (673,755) | (405,753)
Share of profit (loss) of equity-accounted investees, net |  | 349,910 | (256,458) | 269,678
Income tax expense |  | (612,135) | (320,954) | (789,367)
Segment profits (losses) |  | 527,023 | 1,005,276 | 1,846,059
Segment total assets |  | 105,287,678 | 103,443,735 |
Segment total liabilities |  | 42,894,966 | 42,000,967 |
External customers [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | (107,948) | 771,265 | (70,648)
Reportable segments [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 117,240,806 | 125,013,953 | 127,080,006
Interest income |  | 653,047 | 662,099 | 577,336
Interest expenses |  | (1,305,023) | (1,285,679) | (1,180,096)
Depreciation and amortization |  | (4,261,180) | (4,058,664) | (3,845,492)
Impairment loss on property, plant and equipment and others |  | (205,536) | (660,275) | (409,552)
Share of profit (loss) of equity-accounted investees, net |  | (340,764) | (1,137,480) | (383,220)
Income tax expense |  | (657,907) | (294,895) | (842,059)
Segment total assets | [1] | 170,842,653 | 165,497,714 |
Segment total liabilities | [1] | 54,801,990 | 53,072,062 |
Reportable segments [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 117,240,806 | 125,013,953 | 127,080,006
Interest income |  | 653,047 | 662,099 | 577,336
Interest expenses |  | (1,305,023) | (1,285,679) | (1,180,096)
Depreciation and amortization |  | (4,261,180) | (4,058,664) | (3,845,492)
Impairment loss on property, plant and equipment and others |  | (205,536) | (660,275) | (409,552)
Share of profit (loss) of equity-accounted investees, net |  | (340,764) | (1,137,480) | (383,220)
Income tax expense |  | (657,907) | (294,895) | (842,059)
Segment profits (losses) |  | 1,124,885 | 2,099,066 | 2,911,247
Segment total assets |  | 170,842,653 | 165,497,714 | 160,850,203
Investment in subsidiaries, associates and joint ventures |  | 59,143,953 | 55,514,284 | 53,915,345
Acquisition of non-current assets |  | 6,421,674 | 9,761,879 | 7,516,879
Segment total liabilities |  | 54,801,990 | 53,072,062 | 51,853,327
Reportable segments [member] | External customers [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 69,094,886 | 72,688,143 | 77,127,197
Reportable segments [member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 69,094,886 | 72,688,143 | 77,127,197
Reportable segments [member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 48,145,920 | 52,325,810 | 49,952,809
Reportable segments [member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 28,990,523 | 33,365,079 | 31,891,492
Reportable segments [member] | Steel [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 59,398,844 | 62,200,920 | 63,538,698
Interest income |  | 265,247 | 279,469 | 281,530
Interest expenses |  | (642,769) | (699,586) | (718,937)
Depreciation and amortization |  | (3,157,768) | (3,166,418) | (3,044,565)
Impairment loss on property, plant and equipment and others |  | (74,950) | (273,160) | (305,437)
Share of profit (loss) of equity-accounted investees, net |  | 78,456 | (321,718) | (182,668)
Income tax expense |  | (425,319) | (306,337) | (595,457)
Segment profits (losses) |  | 1,151,885 | 691,477 | 1,241,211
Segment total assets |  | 65,563,164 | 66,585,437 | 66,224,069
Investment in subsidiaries, associates and joint ventures |  | 4,853,061 | 4,339,321 | 3,855,038
Acquisition of non-current assets |  | 2,740,237 | 3,589,327 | 3,748,163
Segment total liabilities |  | 22,346,902 | 24,375,388 | 24,154,043
Reportable segments [member] | Steel [member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 37,284,859 | 39,104,095 | 40,393,273
Reportable segments [member] | Steel [member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 22,113,985 | 23,096,825 | 23,145,425
Reportable segments [member] | Steel [member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 13,410,240 | 15,038,824 | 15,293,780
Reportable segments [member] | Infrastructure Trading [Member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 42,220,911 | 42,903,253 | 42,943,752
Interest income |  | 71,820 | 72,208 | 66,398
Interest expenses |  | (294,752) | (308,671) | (284,056)
Depreciation and amortization |  | (550,848) | (492,626) | (508,161)
Impairment loss on property, plant and equipment and others |  | (102,427) | (36,161) | (9,826)
Share of profit (loss) of equity-accounted investees, net |  | (66,743) | (142,090) | (37,368)
Income tax expense |  | (127,340) | (189,573) | (239,164)
Segment profits (losses) |  | 562,687 | 536,684 | 723,929
Segment total assets |  | 23,642,210 | 21,012,507 | 19,650,557
Investment in subsidiaries, associates and joint ventures |  | 4,373,069 | 3,080,324 | 2,933,140
Acquisition of non-current assets |  | 917,829 | 916,654 | 553,955
Segment total liabilities |  | 13,197,558 | 12,152,036 | 11,842,508
Reportable segments [member] | Infrastructure Trading [Member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 23,744,104 | 22,803,773 | 24,033,506
Reportable segments [member] | Infrastructure Trading [Member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 18,476,807 | 20,099,480 | 18,910,246
Reportable segments [member] | Infrastructure Trading [Member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 8,320,896 | 9,427,415 | 8,906,571
Reportable segments [member] | Infrastructure Construction [Member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 7,228,333 | 9,829,578 | 10,267,503
Interest income |  | 166,612 | 158,867 | 100,682
Interest expenses |  | (158,004) | (146,885) | (105,102)
Depreciation and amortization |  | (77,880) | (77,355) | (66,854)
Impairment loss on property, plant and equipment and others |  | (1,124) | (8,420) | (28,031)
Share of profit (loss) of equity-accounted investees, net |  | (59,415) | (111,476) | 13,632
Income tax expense |  | 165,765 | (18,387) | (95,364)
Segment profits (losses) |  | (565,450) | (194,292) | 183,453
Segment total assets |  | 9,797,114 | 9,270,877 | 9,631,691
Investment in subsidiaries, associates and joint ventures |  | 243,420 | 276,994 | 481,672
Acquisition of non-current assets |  | 24,041 | 29,033 | 119,438
Segment total liabilities |  | 6,662,955 | 5,627,404 | 5,589,827
Reportable segments [member] | Infrastructure Construction [Member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 5,615,425 | 7,473,006 | 8,301,130
Reportable segments [member] | Infrastructure Construction [Member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,612,908 | 2,356,572 | 1,966,373
Reportable segments [member] | Infrastructure Construction [Member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,536,259 | 2,233,541 | 1,864,723
Reportable segments [member] | Infrastructure Logistics and Others [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 3,554,224 | 4,139,201 | 3,945,953
Interest income |  | 14,037 | 18,902 | 15,837
Interest expenses |  | (10,091) | (12,169) | (14,091)
Depreciation and amortization |  | (61,323) | (61,578) | (54,219)
Impairment loss on property, plant and equipment and others |  | (69) | (10,518) | 0
Share of profit (loss) of equity-accounted investees, net |  | 0 | 0 | 0
Income tax expense |  | (30,729) | (46,996) | (39,250)
Segment profits (losses) |  | 61,045 | 104,022 | 170,959
Segment total assets |  | 2,041,956 | 2,592,169 | 2,476,842
Investment in subsidiaries, associates and joint ventures |  | 26,859 | 12,165 | 9,999
Acquisition of non-current assets |  | 215,973 | 252,499 | 137,237
Segment total liabilities |  | 784,391 | 1,003,673 | 993,071
Reportable segments [member] | Infrastructure Logistics and Others [member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 308,698 | 421,742 | 470,613
Reportable segments [member] | Infrastructure Logistics and Others [member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 3,245,526 | 3,717,459 | 3,475,340
Reportable segments [member] | Infrastructure Logistics and Others [member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 3,213,965 | 3,694,427 | 3,431,594
Reportable segments [member] | Rechargeable Battery Materials [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 3,338,386 | 3,829,851 | 4,821,886
Interest income |  | 33,093 | 47,525 | 39,339
Interest expenses |  | (163,332) | (117,040) | (57,638)
Depreciation and amortization |  | (387,604) | (240,723) | (155,567)
Impairment loss on property, plant and equipment and others |  | (26,967) | (331,717) | (55,601)
Share of profit (loss) of equity-accounted investees, net |  | (4,598) | (170,122) | (67,248)
Income tax expense |  | 56,431 | 203,475 | 13,281
Segment profits (losses) |  | (592,030) | (634,860) | (235,603)
Segment total assets |  | 17,624,390 | 15,090,058 | 10,909,515
Investment in subsidiaries, associates and joint ventures |  | 3,557,211 | 2,397,830 | 1,550,524
Acquisition of non-current assets |  | 2,218,337 | 4,717,540 | 2,795,447
Segment total liabilities |  | 7,827,176 | 7,347,647 | 4,972,568
Reportable segments [member] | Rechargeable Battery Materials [member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 2,096,318 | 2,812,549 | 3,816,042
Reportable segments [member] | Rechargeable Battery Materials [member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,242,068 | 1,017,302 | 1,005,844
Reportable segments [member] | Rechargeable Battery Materials [member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,080,601 | 959,313 | 972,511
Reportable segments [member] | Other reportable segment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,500,108 | 2,111,150 | 1,562,214
Interest income |  | 102,238 | 85,128 | 73,550
Interest expenses |  | (36,075) | (1,328) | (272)
Depreciation and amortization |  | (25,757) | (19,964) | (16,126)
Impairment loss on property, plant and equipment and others |  | 1 | (299) | (10,657)
Share of profit (loss) of equity-accounted investees, net |  | (288,464) | (392,074) | (109,568)
Income tax expense |  | (296,715) | 62,923 | 113,895
Segment profits (losses) |  | 506,748 | 1,596,035 | 827,298
Segment total assets |  | 52,173,819 | 50,946,666 | 51,957,529
Investment in subsidiaries, associates and joint ventures |  | 46,090,333 | 45,407,650 | 45,084,972
Acquisition of non-current assets |  | 305,257 | 256,826 | 162,639
Segment total liabilities |  | 3,983,008 | 2,565,914 | 4,301,310
Reportable segments [member] | Other reportable segment [member] | External customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 45,482 | 72,978 | 112,633
Reportable segments [member] | Other reportable segment [member] | Internal customers [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | 1,454,626 | 2,038,172 | 1,449,581
Reportable segments [member] | Other reportable segment [member] | Intersegment [member] | Previously stated [member] |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Revenue |  | ₩ 1,428,562 | ₩ 2,011,559 | ₩ 1,422,313
[1] | As segment assets and liabilities are determined based on separate financial statements, the carrying amount of assets of subsidiaries, which are in a different segment from that of their immediate parent company, in the separate financial statements the immediate parent company is eliminated upon consolidation. In addition, the amount of investment in associates and joint ventures are adjusted from the amount reflected in segment assets to that determined using equity method in consolidated financial statements.

X
- Definition The amount of additions to non-current assets other than financial instruments, deferred tax assets, net defined benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Classes of financial instruments [domain]; Non-current assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_24_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_AdditionsToNoncurrentAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_c&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_e&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_b&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_b&doctype=Standard -URIDate 2025-03-27 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_b&doctype=Standard -URIDate 2025-03-27 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_a&doctype=Standard -URIDate 2025-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_a&doctype=Standard -URIDate 2025-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_Assets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_e&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B13 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B13_d&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_102&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_99&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 104 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_104&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_DepreciationAndAmortisationExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2025-01-01 -Paragraph 35 -Subparagraph b -Clause viii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2025-en-r&anchor=para_35_b_viii&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_h&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2025-01-01 -Paragraph 79 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_79&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2025-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2025-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B13 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B13_g&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 192 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_192&doctype=Standard -URIDate 2025-03-27 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 194 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_c_i&doctype=Standard -URIDate 2025-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 194 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_c_ii&doctype=Standard -URIDate 2025-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 192 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_192&doctype=Standard -URIDate 2025-03-27 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 194 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_c_i&doctype=Standard -URIDate 2025-03-27 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 194 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_c_ii&doctype=Standard -URIDate 2025-03-27 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 82 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_82_d&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_IncomeTaxExpenseContinuingOperations
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of expense arising from interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B13 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B13_f&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_d&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_InterestExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Total for all associates [member]; Total for all joint ventures [member]; Total for all subsidiaries [member]; Investments in subsidiaries reported in separate financial statements] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2025-01-01 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2025-en-r&anchor=para_10&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociates
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_e&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_d&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2025-01-01 -Paragraph 93 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2025-en-r&anchor=para_93_b&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_b&doctype=Standard -URIDate 2025-03-27 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_b&doctype=Standard -URIDate 2025-03-27 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_a&doctype=Standard -URIDate 2025-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 95 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_95_a&doctype=Standard -URIDate 2025-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_Liabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2025-01-01 -Paragraph 32 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2025-en-r&anchor=para_32_a_ii&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2025-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2025-en-r&anchor=para_24_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_b&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B10 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 17 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2025-en-r&anchor=para_113_b&doctype=Standard -URIDate 2025-03-27 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_28_a_ii&doctype=Standard -URIDate 2025-03-27 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_24_b&doctype=Standard -URIDate 2025-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_24_b&doctype=Standard -URIDate 2025-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_28_a_ii&doctype=Standard -URIDate 2025-03-27 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 81A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_81A_a&doctype=Standard -URIDate 2025-03-27 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 106 -Subparagraph d -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_106_d_i&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_ProfitLoss
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 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 32 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_32&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 33 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_33_a&doctype=Standard -URIDate 2025-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 34 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_34&doctype=Standard -URIDate 2025-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2025-01-01 -Paragraph 33 -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2025-en-r&anchor=para_33_b_i&doctype=Standard -URIDate 2025-03-27 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B12 -Subparagraph b -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B12_b_v&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B10 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 82 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_82_a&doctype=Standard -URIDate 2025-03-27 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_103&doctype=Standard -URIDate 2025-03-27 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_102&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_Revenue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of income arising from interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_c&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph B13 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B13_e&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 4: 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_RevenueFromInterest
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 8 -IssueDate 2025-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2025-01-01 -Paragraph 23 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_g&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 82 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_82_c&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Impairment loss (reversal of impairment loss) on property plant and equipment and others. + References No definition available. + Details
Name: | pkx_ImpairmentLossReversalOfImpairmentLossOnPropertyPlantAndEquipmentAndOthers
Namespace Prefix: | pkx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfCustomersAxis=pkx_ExternalCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=ifrs-full_PreviouslyStatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfCustomersAxis=pkx_InternalCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfCustomersAxis=pkx_IntersegmentMember
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_InfrastructureTradingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_SegmentsAxis=pkx_InfrastructureLogisticsandOthersMember
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: |

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