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Net Defined Benefit Liabilities (Assets) (Tables) | 12 Months Ended
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Dec. 31, 2023
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, 2022 and 2023, are determined as follows:
(in millions of Korean won) |  | December 31, 2022 |  |  | December 31, 2023 |
Present value of defined benefit obligations |  | ￦ | 2,218,655 |  |  | ￦ | 2,365,793 |
Fair value of plan assets |  |  | (2,478,143 | ) |  |  | (2,462,925 | )
Liabilities |  | ￦ | 51,654 |  |  | ￦ | 63,616 |
Assets |  | ￦ | 311,142 |  |  | ￦ | 160,748 |
Summary of Changes in the Defined Benefit Obligations |
| (2) | Changes in the defined benefit obligations for the years ended December 31, 2022 and 2023, are as follows:
(in millions of Korean won) |  | 2022 |  |  | 2023 |
Beginning |  | ￦ | 2,494,930 |  |  | ￦ | 2,218,655 |
Current service cost |  |  | 238,068 |  |  |  | 213,489 |
Interest expense |  |  | 59,041 |  |  |  | 103,874 |
Benefit paid |  |  | (316,047 | ) |  |  | (358,298 | )
Changes due to settlements of plan & Past Service Cost |  |  | (701 | ) |  |  | 1 |
Remeasurements: |  |  |  |  |  |  |  |
Actuarial gains ( losses ) arising from changes in demographic assumptions |  |  | (13,048 | ) |  |  | 1,903 |
Actuarial gains ( losses ) arising from changes in financial assumptions |  |  | (323,501 | ) |  |  | 138,462 |
Actuarial gains arising from experience adjustments |  |  | 80,845 |  |  |  | 48,174 |
Acquisition and disposition of businesses, etc. |  |  | (932 | ) |  |  | (467 | )
Ending |  | ￦ | 2,218,655 |  |  | ￦ | 2,365,793 |
| (3) | Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023, are as follows:
(in millions of Korean won) |  | 2022 |  |  | 2023 |
Beginning |  | ￦ | 2,314,632 |  |  | ￦ | 2,478,143 |
Interest income |  |  | 55,902 |  |  |  | 121,336 |
Remeasurements: |  |  |  |  |  |  |  |
Return on plan assets (excluding amounts included in interest income) |  |  | (8,542 | ) |  |  | 9,410 |
Benefits paid |  |  | (287,419 | ) |  |  | (307,762 | )
Employer contributions |  |  | 401,358 |  |  |  | 165,128 |
Acquisition and disposition of businesses, etc. |  |  | 2,212 |  |  |  | (3,330 | )
Ending |  | ￦ | 2,478,143 |  |  | ￦ | 2,462,925 |
Summary of Amounts Recognized in the Consolidated Statements of Operations |
| (4) | Amounts recognized in the consolidated statements of profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:
(in millions of Korean won) |  | 2021 |  |  | 2022 |  |  | 2023 |
Current service cost |  | ￦ | 249,125 |  |  | ￦ | 238,068 |  |  | ￦ | 213,922 |
Net Interest cost |  |  | 5,047 |  |  |  | 3,139 |  |  |  | (17,462 | )
Changes due to settlements of plan & Past Service Cost |  |  | (681 | ) |  |  | (701 | ) |  |  | 1 |
Transfer out |  |  | (16,660 | ) |  |  | (15,102 | ) |  |  | (13,435 | )
Total expenses |  | ￦ | 236,831 |  |  | ￦ | 225,404 |  |  | ￦ | 183,026 |
Summary of Principal Actuarial Assumptions |
| (5) | Principal actuarial assumptions used are as follows:
|  | December 31, 2021 |  |  | December 31, 2022 |  |  | December 31, 2023 |
Discount rate |  |  | 2.1%~3.70% |  |  |  | 2.4%~6.29% |  |  |  | 3.67%~5.51% |
Salary growth rate |  |  | 1%~6.97% |  |  |  | 1.82%~8.9% |  |  |  | 1.7%~8.96% |
Summary of Sensitivity of the Defined Benefit Obligations |
| (6) | The sensitivity of the defined benefit obligations as of December 31, 2023, 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 |  |  | ￦ (139,461) |  |  | ￦ | 150,568 |
Salary growth rate |  | 0.5% point |  |  | 145,687 |  |  |  | (135,431 | )
Summary of Expected Maturity Analysis of Undiscounted Pension Benefits | The expected maturity analysis of undiscounted pension benefits as o f December 31, 2023, 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 |  | ￦ | 257,315 |  |  | ￦ | 376,352 |  |  | ￦ | 910,076 |  |  | ￦ | 2,013,167 |  |  | ￦ | 3,556,910 |

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