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v3.26.1

Income tax expense - Summary of deferred tax assets and liabilities that were directly charged or credited to equity (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
OCI |  |
Beginning balance | ₩ (2,547,902) | ₩ (1,373,237)
Changes | (905,110) | (1,174,665)
Ending balance | (3,453,012) | (2,547,902)
Tax effect |  |
Beginning balance | 723,463 | 298,784
Changes | 254,736 | 424,679
Ending balance | 978,199 | 723,463
Gain (loss) on valuation of financial assets measured at FVOCI |  |
OCI |  |
Beginning balance | (3,112,803) | (4,727,044)
Changes | (2,024,457) | 1,614,241
Ending balance | (5,137,260) | (3,112,803)
Tax effect |  |
Beginning balance | 798,285 | 1,223,503
Changes | 585,987 | (425,218)
Ending balance | 1,384,272 | 798,285
Gain (loss) on financial liabilities designated at FVTPL attributable to changes in credit risk |  |
OCI |  |
Beginning balance | (7,566) | (5,278)
Changes | 1,403 | (2,288)
Ending balance | (6,163) | (7,566)
Tax effect |  |
Beginning balance | 1,997 | 1,393
Changes | (301) | 604
Ending balance | 1,696 | 1,997
Foreign currency translation adjustments for foreign operations |  |
OCI |  |
Beginning balance | 296,233 | (105,343)
Changes | (140,164) | 401,576
Ending balance | 156,069 | 296,233
Tax effect |  |
Beginning balance | 257 | (13,174)
Changes | (3,785) | 13,431
Ending balance | (3,528) | 257
Gain (loss) on cash flow hedges |  |
OCI |  |
Beginning balance | 11,133 | (48,623)
Changes | (255,994) | 59,756
Ending balance | (244,861) | 11,133
Tax effect |  |
Beginning balance | (7,727) | 13,515
Changes | 82,890 | (21,242)
Ending balance | 75,163 | (7,727)
Equity in other comprehensive income (loss) of associates |  |
OCI |  |
Beginning balance | 7,746 | (1,321)
Changes | (22,965) | 9,067
Ending balance | (15,219) | 7,746
Tax effect |  |
Beginning balance | (2,044) | 352
Changes | 6,228 | (2,396)
Ending balance | 4,184 | (2,044)
Remeasurements of the defined benefit liability |  |
OCI |  |
Beginning balance | (482,002) | (398,538)
Changes | 183 | (83,464)
Ending balance | (481,819) | (482,002)
Tax effect |  |
Beginning balance | 127,914 | 106,209
Changes | 5,398 | 21,705
Ending balance | 133,312 | 127,914
Net finance income (expense) on insurance contract |  |
OCI |  |
Beginning balance | 739,357 | 3,912,910
Changes | 1,536,884 | (3,173,553)
Ending balance | 2,276,241 | 739,357
Tax effect |  |
Beginning balance | (195,219) | (1,033,014)
Changes | (421,681) | 837,795
Ending balance | ₩ (616,900) | ₩ (195,219)

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