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Investments in Associates and Joint Ventures - Summary of Changes in Investments in Associates and Joint Ventures (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | ₩ 1,288,429 | ₩ 557,881
Acquisition (Disposal) | 255,041 | 476,948
Share of net profit (loss) from associates and joint ventures | (16,821) | 116,174
Others | (45,927) | 137,426
Ending | 1,480,722 | 1,288,429
Hyundai Robotics Co., Ltd. [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 48,725 | 50,936
Share of net profit (loss) from associates and joint ventures | 798 | (2,373)
Others | (151) | 162
Ending | 49,372 | 48,725
KT-IBKC future investment fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 12,081 | 16,190
Acquisition (Disposal) |  | (5,700)
Share of net profit (loss) from associates and joint ventures |  | 1,591
Ending |  | 12,081
K Bank [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 831,737 | 208,272
Acquisition (Disposal) |  | 424,957
Share of net profit (loss) from associates and joint ventures | 29,010 | 5,809
Others | (7,991) | 192,699
Ending | 852,756 | 831,737
K-Realty CR-REITs No.1 [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 67,658 | 31,088
Share of net profit (loss) from associates and joint ventures |  | 75,676
Others |  | (39,106)
Ending |  | 67,658
Others [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 149,293 | 81,240
Acquisition (Disposal) |  | 57,691
Share of net profit (loss) from associates and joint ventures |  | 18,769
Others |  | (8,407)
Ending |  | 149,293
Other associates and joint ventures [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 189,810 |
Acquisition (Disposal) | 100,040 |
Share of net profit (loss) from associates and joint ventures | (24,688) |
Others | (56,078) |
Ending | 209,084 | 189,810
KIF Investment Fund [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 178,935 | 170,155
Share of net profit (loss) from associates and joint ventures | 2,502 | 16,702
Others | (10,458) | (7,922)
Ending | 170,979 | 178,935
Megazone Cloud Corporation [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Acquisition (Disposal) | 130,001 |
Share of net profit (loss) from associates and joint ventures | (22,555) |
Others | 28,753 |
Ending | 136,199 |
IGIS No. 4681 General Private Real Estate Investment Company [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Acquisition (Disposal) | 25,000 |
Share of net profit (loss) from associates and joint ventures | (1,411) |
Ending | 23,589 |
KT-DSC creative economy youth start-up investment fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 22,138 |
Share of net profit (loss) from associates and joint ventures | (13) |
Others | (2) |
Ending | 22,123 | 22,138
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 17,084 |
Share of net profit (loss) from associates and joint ventures | (464) |
Ending | ₩ 16,620 | ₩ 17,084

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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; 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 2022-03-24 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2022-en-r&anchor=para_10&doctype=Standard -URIDate 2022-03-24 + Details
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