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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, 2021 | Dec. 31, 2020
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | ₩ 557,881 | ₩ 267,660
Acquisition (Disposal) | 476,948 | 273,277
Share of net profit from associates and joint ventures | 116,174 | 18,320
Others | 137,426 | (1,376)
Ending | 1,288,429 | 557,881
Korea Information & Technology Fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 170,155 | 163,975
Share of net profit from associates and joint ventures | 16,702 | 12,205
Others | (7,922) | (6,025)
Ending | 178,935 | 170,155
KT-CKP New Media Investment Fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning |  | 134
Acquisition (Disposal) |  | (134)
Hyundai Robotics Co., Ltd. [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 50,936 |
Acquisition (Disposal) | 0 | 50,000
Share of net profit from associates and joint ventures | (2,373) | (64)
Others | 162 | 1,000
Ending | 48,725 | 50,936
Others [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 112,328 | 44,293
Acquisition (Disposal) |  | 28,400
Share of net profit from associates and joint ventures |  | 34,298
Others |  | 5,337
Ending |  | 112,328
KT-IBKC future investment fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 16,190 | 14,100
Acquisition (Disposal) | (5,700) |
Share of net profit from associates and joint ventures | 1,591 | 2,090
Ending | 12,081 | 16,190
K Bank [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 208,272 | 45,158
Acquisition (Disposal) | 424,957 | 195,011
Share of net profit from associates and joint ventures | 5,809 | (30,209)
Others | 192,699 | (1,688)
Ending | 831,737 | 208,272
KREALTYCR REITs No One Member [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 31,088 |
Share of net profit from associates and joint ventures | 75,676 |
Others | (39,106) |
Ending | 67,658 | 31,088
Others [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 81,240 |
Acquisition (Disposal) | 57,691 |
Share of net profit from associates and joint ventures | 18,769 |
Others | (8,407) |
Ending | ₩ 149,293 | ₩ 81,240

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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 2021-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2021-en-r&anchor=para_10&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The entity's share of the profit (loss) from continuing operations of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Continuing operations [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss) from continuing operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2021-01-01 -Paragraph B16 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_B16_a&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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