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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
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | ₩ 1,556,889 | ₩ 1,480,722
Acquisition (Disposal) | 21,611 | 101,387
Share of net profit (loss) from associates and joint ventures | 6,029 | (35,634)
Others | (22,297) | 10,414
Ending | 1,562,232 | 1,556,889
KIF Investment Fund [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 177,054 | 170,979
Share of net profit (loss) from associates and joint ventures | 12,396 | 5,443
Others | 1,675 | 632
Ending | 191,125 | 177,054
K Bank [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 872,881 | 852,756
Acquisition (Disposal) | 0 |
Share of net profit (loss) from associates and joint ventures | 43,614 | 1,089
Others | 1,146 | 19,036
Ending | 917,641 | 872,881
Hyundai Robotics Co., Ltd. [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 47,734 | 49,372
Acquisition (Disposal) | 0 |
Share of net profit (loss) from associates and joint ventures | (1,138) | (1,637)
Others | (766) | (1)
Ending | 45,830 | 47,734
Megazone Cloud Corporation [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 131,694 | 136,199
Acquisition (Disposal) |  | 0
Share of net profit (loss) from associates and joint ventures | (3,047) | (4,583)
Others | 2,126 | 78
Ending | 130,773 | 131,694
IGIS No. 468-1 General Private Real Estate Investment Company [Member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 23,484 | 23,589
Acquisition (Disposal) |  | 0
Share of net profit (loss) from associates and joint ventures | (110) | (105)
Ending | 23,374 | 23,484
KT-DSC creative economy youth start-up investment fund [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 25,117 | 22,123
Acquisition (Disposal) | (275) | (500)
Share of net profit (loss) from associates and joint ventures | (8,046) | 3,494
Others | (845) | 0
Ending | 15,951 | 25,117
IGIS No. 395 Professional Investors Private Investment Real Estate Investment LLC [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 11,942 | 16,620
Share of net profit (loss) from associates and joint ventures | (2,215) | (4,678)
Ending | 9,727 | 11,942
Other associates and joint ventures [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 243,491 | 209,084
Acquisition (Disposal) | 41,542 | 101,887
Share of net profit (loss) from associates and joint ventures | (35,662) | (34,912)
Others | (21,560) | (32,568)
Ending | 227,811 | 243,491
IGILS Marine Solution Co., Ltd. [member] |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |
Beginning | 23,492 |
Acquisition (Disposal) | (19,656) |
Share of net profit (loss) from associates and joint ventures | 237 | 255
Others | (4,073) | 23,237
Ending | ₩ 0 | ₩ 23,492

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