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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, 2019 | Dec. 31, 2018
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | ₩ 272,407 | ₩ 279,431
Acquisition (Disposal) | 13,021 | 26,912
Share of net profit from associates and joint ventures | (3,252) | 5,912
Others | (14,516) | (39,848)
Ending | 267,660 | 272,407
Korea Information & Technology Fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 148,255 | 139,534
Share of net profit from associates and joint ventures | 17,956 | 15,037
Others | (2,236) | (6,316)
Ending | 163,975 | 148,255
KT-SB Venture Investment Fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 4,470 | 2,942
Acquisition (Disposal) | (4,470) |
Share of net profit from associates and joint ventures |  | 1,528
Ending |  | 4,470
KT-CKP New Media Investment Fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 281 | 2,294
Acquisition (Disposal) | (174) | (1,229)
Share of net profit from associates and joint ventures | 27 | (784)
Ending | 134 | 281
Others [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 56,785 | 81,728
Acquisition (Disposal) | (7,867) | 2,466
Share of net profit from associates and joint ventures | 7,241 | 8,607
Others | (11,866) | (36,016)
Ending | 44,293 | 56,785
KT-IBKC future investment fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 9,961 | 10,825
Acquisition (Disposal) | 3,750 | (1,050)
Share of net profit from associates and joint ventures | 389 | 1,028
Others |  | (842)
Ending | 14,100 | 9,961
K Bank Inc. [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 52,655 | 42,108
Acquisition (Disposal) | 21,782 | 26,725
Share of net profit from associates and joint ventures | (28,865) | (19,504)
Others | (414) | 3,326
Ending | ₩ 45,158 | ₩ 52,655

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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] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2019-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2019-en-r&anchor=para_10&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph B16 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B16_a&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition Acquisition (disposal) of investments in subsidiaries, joint ventures and associates. + References No definition available. + Details
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- Definition The increase (decrease) in Investments in Associates and Joint ventures resulting from other movements. + References No definition available. + Details
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