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Restricted Deposits (Tables) | 12 Months Ended
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Dec. 31, 2022
Restricted Deposits [Abstract] |
Summary of Restricted Deposits | Restricted deposits as of December 31, 2021 and 2022 are as follows:
|  |  |  |  |  |  | 2021 |  |  | 2022 |
|  |  |  |  |  |  | In millions of won |
Cash and cash equivalents |  | Escrow accounts |  | ￦ |  |  |  |  | — |  |  |  | 2,912 |
|  | Deposits for government project and others |  |  |  |  |  |  | 22,286 |  |  |  | 30,586 |
|  | Collateral provided for borrowings |  |  |  |  |  |  | 264,813 |  |  |  | 250,346 |
|  | Collateral provided for lawsuit |  |  |  |  |  |  | 42 |  |  |  | 57 |
|  | Deposits for transmission regional support program |  |  |  |  |  |  | 5,921 |  |  |  | 8,626 |
|  | Deposits for other business purposes |  |  |  |  |  |  | 3,050 |  |  |  | 3,825 |
Short-term financial instruments |  | Restriction on withdrawal related to ‘win-win growth program’ for small and medium enterprises and others |  |  |  |  |  |  | 114,000 |  |  |  | 101,500 |
|  | Collateral provided for borrowings |  |  |  |  |  |  | 11,745 |  |  |  | 1,000 |
Non-current financial assets at fair value through profit or loss |  | Decommissioning costs of nuclear power plants |  |  |  |  |  |  | 531,720 |  |  |  | 386,220 |
Long-term financial instruments |  | Escrow accounts |  |  |  |  |  |  | 70 |  |  |  | 1,603 |
|  | Guarantee deposits for banking accounts at oversea branches |  |  |  |  |  |  | 333 |  |  |  | 18 |
|  | Collateral provided for borrowings |  |  |  |  |  |  | — |  |  |  | 21,745 |
|  | Decommissioning costs of nuclear power plants |  |  |  |  |  |  | 324,609 |  |  |  | 497,609 |
|  | Funds for developing small and medium enterprises |  |  |  |  |  |  | 10,000 |  |  |  | — |
Other non-current assets |  | Deposits for other business purposes |  |  |  |  |  |  | — |  |  |  | 4,355 |
|  |  |  | ￦ |  |  |  |  | 1,288,589 |  |  |  | 1,310,402 |

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