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v3.24.1.u1

Provisions - Summary of Changes in Greenhouse Gas Emissions Rights (Details) - 3rd planned period [Member] ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 KRW (₩) kT | Dec. 31, 2022 KRW (₩) kT
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] | 45,061 | 49,908 |
Purchase (Sell) | kT |  | 2,095 | 2,601 |
Government submission | kT |  | (16,456) | (18,440) |
Borrowing (carryforward) | kT |  | 292 | 334 |
Others | kT |  |  | 0 |
Reclassification | kT |  | (2) |  |
Quantity Ending | kT |  | 30,990 | 34,403 |
Balance Beginning | ₩ | [1] | ₩ 235,966 | ₩ 602,795 |
Purchase (Sell) | ₩ |  | 217,385 | 553,757 |
Government submission | ₩ |  | (342,755) | (753,707) |
Borrowing (carryforward) | ₩ |  | 27,037 | 60,473 |
Others | ₩ |  |  | (227,352) |
Reclassification | ₩ |  | (5,664) |  |
Balance Ending | ₩ |  | 131,969 | ₩ 235,966 | [1]
Period 2021 [Member] |  |  |  |
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] |  | 16,433 |
Purchase (Sell) | kT |  |  | 1,191 |
Government submission | kT |  |  | (17,602) |
Borrowing (carryforward) | kT |  |  | (22) |
Others | kT |  |  | 0 |
Quantity Ending | kT |  |  | 0 |
Balance Beginning | ₩ |  | ₩ 0 | ₩ 524,658 | [1]
Purchase (Sell) | ₩ |  |  | 267,433 |
Government submission | ₩ |  |  | (580,807) |
Borrowing (carryforward) | ₩ |  |  | (3,298) |
Others | ₩ |  |  | (207,986) |
Balance Ending | ₩ |  |  | ₩ 0 |
Period 2022 [Member] |  |  |  |
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] | 14,704 | 14,942 |
Purchase (Sell) | kT |  | 1,315 | 1,343 |
Government submission | kT |  | (15,972) | (838) |
Borrowing (carryforward) | kT |  | (45) | 286 |
Others | kT |  |  | 0 |
Reclassification | kT |  | (2) |  |
Quantity Ending | kT |  | 0 | 15,733 |
Balance Beginning | ₩ | [1] | ₩ 192,005 | ₩ 62,735 |
Purchase (Sell) | ₩ |  | 135,040 | 272,824 |
Government submission | ₩ |  | (302,918) | (173,145) |
Borrowing (carryforward) | ₩ |  | (24,127) | 45,847 |
Others | ₩ |  |  | (16,256) |
Reclassification | ₩ |  | 0 |  |
Balance Ending | ₩ |  | ₩ 0 | ₩ 192,005 | [1]
Period 2023 [Member] |  |  |  |
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] | 14,204 | 11,166 |
Purchase (Sell) | kT |  | 707 | 32 |
Government submission | kT |  | (484) | 0 |
Borrowing (carryforward) | kT |  | (231) | 48 |
Others | kT |  |  | 0 |
Reclassification | kT |  | 0 |  |
Quantity Ending | kT |  | 14,196 | 11,246 |
Balance Beginning | ₩ | [1] | ₩ 18,785 | ₩ 8,529 |
Purchase (Sell) | ₩ |  | 67,506 | 6,315 |
Government submission | ₩ |  | (39,837) | 245 |
Borrowing (carryforward) | ₩ |  | (28,266) | 12,225 |
Others | ₩ |  |  | (8,529) |
Reclassification | ₩ |  | 6,940 |  |
Balance Ending | ₩ |  | ₩ 25,128 | ₩ 18,785 | [1]
Period 2024 [Member] |  |  |  |
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] | 8,088 | 3,671 |
Purchase (Sell) | kT |  | 73 | 35 |
Government submission | kT |  | 0 | 0 |
Borrowing (carryforward) | kT |  | 568 | 22 |
Others | kT |  |  | 0 |
Reclassification | kT |  | 0 |  |
Quantity Ending | kT |  | 8,729 | 3,728 |
Balance Beginning | ₩ | [1] | ₩ 12,884 | ₩ 0 |
Purchase (Sell) | ₩ |  | 14,839 | 7,185 |
Government submission | ₩ |  | 0 | 0 |
Borrowing (carryforward) | ₩ |  | 79,430 | 5,699 |
Others | ₩ |  |  | 0 |
Reclassification | ₩ |  | (7) |  |
Balance Ending | ₩ |  | ₩ 99,968 | ₩ 12,884 | [1]
Period 2025 [Member] |  |  |  |
Disclosure of Detailed Information About Changes in Changes in Greenhouse Gas Emissions Rights [Line Items] |  |  |  |
Adjusted Quantity Beginning | kT | [1] | 8,065 | 3,696 |
Purchase (Sell) | kT |  | 0 | 0 |
Government submission | kT |  | 0 | 0 |
Borrowing (carryforward) | kT |  | 0 | 0 |
Others | kT |  |  | 0 |
Reclassification | kT |  | 0 |  |
Quantity Ending | kT |  | 8,065 | 3,696 |
Balance Beginning | ₩ | [1] | ₩ 12,292 | ₩ 6,873 |
Purchase (Sell) | ₩ |  | 0 | 0 |
Government submission | ₩ |  | 0 | 0 |
Borrowing (carryforward) | ₩ |  | 0 | 0 |
Others | ₩ |  |  | 5,419 |
Reclassification | ₩ |  | (5,419) |  |
Balance Ending | ₩ |  | ₩ 6,873 | ₩ 12,292 | [1]
[1] | Changes such as additional allowances or cancellation of allowances are reflected.

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