XML 217 R204.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Provisions - Summary of Changes in Greenhouse Gas Emissions Rights (Details) - 3rd planned period [Member]
₩ in Millions
 12 Months Ended
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.