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Net Defined Benefit Liabilities (Assets) (Tables) | 12 Months Ended
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Dec. 31, 2024
Statement [LineItems] |
Summary of Amount Recognized in the Statements of Financial Position and Defined Benefit Obligations |
| (1) | The amounts recognized in the statements of financial position as of December 31, 2023 and 2024, are determined as follows:
(In millions of Korean won) |  | December 31, 2023 |  |  | December 31, 2024 |
Present value of defined benefit obligations |  | ￦ | 2,365,793 |  |  |  | 2,232,898 |
Fair value of plan assets |  |  | (2,462,925 | ) |  |  | (2,153,792 | )
Liabilities |  | ￦ | 63,616 |  |  |  | 128,457 |
Assets |  | ￦ | 160,748 |  |  |  | 49,351 |
Summary of Changes in the Defined Benefit Obligations |
| (2) | Changes in the defined benefit obligations for the years ended December 31, 2023 and 2024, are as follows:
(In millions of Korean won) |  | 2023 |  |  | 2024 |
Beginning |  | ￦ | 2,218,655 |  |  |  | 2,365,793 |
Current service cost |  |  | 213,489 |  |  |  | 224,071 |
Interest expense |  |  | 103,874 |  |  |  | 88,882 |
Benefit paid |  |  | (358,298 | ) |  |  | (626,899 | )
Changes due to settlements of plan & Past Service Cost |  |  | 1 |  |  |  | 3,054 |
Remeasurements: |  |  |  |  |  |  |  |
Actuarial gains (losses) arising from changes in demographic assumptions |  |  | 1,903 |  |  |  | 11,531 |
Actuarial gains (losses) arising from changes in financial assumptions |  |  | 138,462 |  |  |  | 90,373 |
Actuarial gains arising from experience adjustments |  |  | 48,174 |  |  |  | 57,699 |
Acquisition and disposition of businesses, etc |  |  | (467 | ) |  |  | 18,394 |
Ending |  | ￦ | 2,365,793 |  |  |  | 2,232,898 |
| (3) | Changes in the fair value of plan assets for the years ended December 31, 2023 and 2024, are as follows:
(In millions of Korean won) |  | 2023 |  |  | 2024 |
Beginning |  | ￦ | 2,478,143 |  |  |  | 2,462,925 |
Interest income |  |  | 121,336 |  |  |  | 97,708 |
Remeasurements: |  |  |  |  |  |  |  |
Return on plan assets (excluding amounts included in interest income) |  |  | 9,410 |  |  |  | (154 | )
Benefits paid |  |  | (307,762 | ) |  |  | (583,162 | )
Employer contributions |  |  | 165,128 |  |  |  | 172,622 |
Acquisition and disposition of businesses, etc. |  |  | (3,330 | ) |  |  | 3,853 |
Ending |  | ￦ | 2,462,925 |  |  |  | 2,153,792 |
Summary of Amounts Recognized in the Consolidated Statements of Operations |
| (4) | Amounts recognized in the consolidated statement of profit or loss for the years ended December 31, 2022, 2023 and 2024, are as follows:
(in millions of Korean won) |  | 2022 |  |  | 2023 |  |  | 2024 |
Current service cost |  | ￦ | 238,068 |  |  | ￦ | 213,922 |  |  | ￦ | 224,071 |
Net Interest cost |  |  | 3,139 |  |  |  | (17,462 | ) |  |  | (8,826 | )
Changes due to settlements of plan & Past Service Cost |  |  | (701 | ) |  |  | 1 |  |  |  | (13,059 | )
Transfer in(out) |  |  | (15,102 | ) |  |  | (13,435 | ) |  |  | 19,191 |
Total expenses |  | ￦ | 225,404 |  |  | ￦ | 183,026 |  |  | ￦ | 221,377 |
Summary of Principal Actuarial Assumptions |
| (5) | Principal actuarial assumptions used are as follows:
|  | December 31, 2022 |  |  | December 31, 2023 |  |  | December 31, 2024 |
Discount rate |  |  | 2.4%~6.29% |  |  |  | 3.67%~5.51% |  |  |  | 3.24%~5.02% |
Salary growth rate |  |  | 1.82%~8.9% |  |  |  | 1.7%~8.96% |  |  |  | 1.66%~8.96% |
Summary of Sensitivity of the Defined Benefit Obligations |
| (6) | The sensitivity of the defined benefit obligations as of December 31, 2024, to changes in the principal assumptions is:
(in percentage, in millions of Korean won) |  | Effect on defined benefit obligation |
|  | Changes in assumption |  | Increase in assumption |  |  | Decrease in assumption |
Discount rate |  | 0.5% point |  |  | ￦ (73,763) |  |  |  | 79,580 |
Salary growth rate |  | 0.5% point |  |  | 76,543 |  |  |  | (71,924 | )
Summary of Expected Maturity Analysis of Undiscounted Pension Benefits | The expected maturity analysis of undiscounted pension benefits as of December 31, 2024, is as follows:
(in millions of Korean won) |  | Less than 1 year |  |  | Between 1-2 years |  |  | Between 2-5 years |  |  | Over 5 years |  |  | Total |
Pension benefits |  | ￦ | 257,012 |  |  | ￦ | 265,473 |  |  | ￦ | 740,445 |  |  | ￦ | 2,048,227 |  |  | ￦ | 3,311,157 |

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