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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2023
Classes of current inventories [abstract] |
Summary of Inventories | Inventories as of December 31, 2022 and 2023 are as follows:
|  |  |  |  | 2022 |
|  |  |  |  | Acquisition cost |  |  | Valuation allowance |  |  | Book value |
|  |  |  |  | In millions of won |
Raw materials |  | ￦ |  |  |  |  | 4,522,171 |  |  |  | (1,350 | ) |  |  | 4,520,821 |
Merchandises |  |  |  |  |  |  | 1,001 |  |  |  | — |  |  |  | 1,001 |
Work-in-progress |  |  |  |  |  |  | 172,089 |  |  |  | (75 | ) |  |  | 172,014 |
Finished goods |  |  |  |  |  |  | 52,642 |  |  |  | (57 | ) |  |  | 52,585 |
Supplies |  |  |  |  |  |  | 2,814,377 |  |  |  | — |  |  |  | 2,814,377 |
Inventories-in-transit |  |  |  |  |  |  | 2,356,444 |  |  |  | — |  |  |  | 2,356,444 |
Other inventories |  |  |  |  |  |  | 13,490 |  |  |  | — |  |  |  | 13,490 |
|  | ￦ |  |  |  |  | 9,932,214 |  |  |  | (1,482 | ) |  |  | 9,930,732 |
|  |  |  |  | 2023 |
|  |  |  |  | Acquisition cost |  |  | Valuation allowance |  |  | Book value |
|  |  |  |  | In millions of won |
Raw materials |  | ￦ |  |  |  |  | 4,624,638 |  |  |  | (1,387 | ) |  |  | 4,623,251 |
Merchandises |  |  |  |  |  |  | 335 |  |  |  | — |  |  |  | 335 |
Work-in-progress |  |  |  |  |  |  | 187,304 |  |  |  | — |  |  |  | 187,304 |
Finished goods |  |  |  |  |  |  | 97,272 |  |  |  | (57 | ) |  |  | 97,215 |
Supplies |  |  |  |  |  |  | 2,930,978 |  |  |  | — |  |  |  | 2,930,978 |
Inventories-in-transit |  |  |  |  |  |  | 1,021,797 |  |  |  | — |  |  |  | 1,021,797 |
Other inventories |  |  |  |  |  |  | 14,735 |  |  |  | — |  |  |  | 14,735 |
|  | ￦ |  |  |  |  | 8,877,059 |  |  |  | (1,444 | ) |  |  | 8,875,615 |

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