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Subsequent Events - Summary of Subsequent Events (Details)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
KRW (₩)
1339 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 03, 2023
Maturiy Jan. 03, 2025
Interest rate (%) 4.40%
Amounts issued for the subsequent period ₩ 200,000
1340 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 03, 2023
Maturiy Jan. 03, 2026
Interest rate (%) 4.50%
Amounts issued for the subsequent period ₩ 320,000
1341 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 05, 2023
Maturiy Jan. 05, 2025
Interest rate (%) 4.20%
Amounts issued for the subsequent period ₩ 140,000
1342 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 05, 2023
Maturiy Jan. 05, 2026
Interest rate (%) 4.30%
Amounts issued for the subsequent period ₩ 240,000
1343 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 09, 2023
Maturiy Jan. 09, 2025
Interest rate (%) 4.20%
Amounts issued for the subsequent period ₩ 130,000
1344 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 09, 2023
Maturiy Jan. 09, 2026
Interest rate (%) 4.28%
Amounts issued for the subsequent period ₩ 280,000
1345 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 12, 2023
Maturiy Jan. 12, 2025
Interest rate (%) 4.00%
Amounts issued for the subsequent period ₩ 110,000
1346 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 12, 2023
Maturiy Jan. 12, 2026
Interest rate (%) 4.08%
Amounts issued for the subsequent period ₩ 330,000
1347 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 16, 2023
Maturiy Jan. 16, 2025
Interest rate (%) 4.00%
Amounts issued for the subsequent period ₩ 190,000
1348 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 16, 2023
Maturiy Jan. 16, 2026
Interest rate (%) 4.05%
Amounts issued for the subsequent period ₩ 220,000
1349 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 19, 2023
Maturiy Jan. 19, 2025
Interest rate (%) 3.85%
Amounts issued for the subsequent period ₩ 180,000
1350 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 19, 2023
Maturiy Jan. 19, 2026
Interest rate (%) 3.87%
Amounts issued for the subsequent period ₩ 320,000
1351 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 25, 2023
Maturiy Jan. 25, 2025
Interest rate (%) 3.85%
Amounts issued for the subsequent period ₩ 140,000
1352 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Jan. 25, 2023
Maturiy Jan. 25, 2026
Interest rate (%) 3.89%
Amounts issued for the subsequent period ₩ 410,000
1353 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 03, 2023
Maturiy Feb. 03, 2025
Interest rate (%) 3.50%
Amounts issued for the subsequent period ₩ 220,000
1354 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 03, 2023
Maturiy Feb. 03, 2026
Interest rate (%) 3.54%
Amounts issued for the subsequent period ₩ 280,000
1355 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 06, 2023
Maturiy Feb. 06, 2025
Interest rate (%) 3.65%
Amounts issued for the subsequent period ₩ 210,000
1356 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 06, 2023
Maturiy Feb. 06, 2026
Interest rate (%) 3.65%
Amounts issued for the subsequent period ₩ 320,000
1357 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 10, 2023
Maturiy Feb. 10, 2025
Interest rate (%) 3.80%
Amounts issued for the subsequent period ₩ 100,000
1358 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 10, 2023
Maturiy Feb. 10, 2026
Interest rate (%) 3.83%
Amounts issued for the subsequent period ₩ 340,000
1359 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 13, 2023
Maturiy Feb. 13, 2025
Interest rate (%) 3.83%
Amounts issued for the subsequent period ₩ 180,000
1360 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 13, 2023
Maturiy Feb. 13, 2026
Interest rate (%) 3.85%
Amounts issued for the subsequent period ₩ 320,000
1361 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 17, 2023
Maturiy Feb. 17, 2025
Interest rate (%) 3.99%
Amounts issued for the subsequent period ₩ 110,000
1362 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 17, 2023
Maturiy Feb. 17, 2026
Interest rate (%) 4.10%
Amounts issued for the subsequent period ₩ 320,000
1363 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 20, 2023
Maturiy Feb. 20, 2025
Interest rate (%) 4.09%
Amounts issued for the subsequent period ₩ 150,000
1364 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Feb. 20, 2023
Maturiy Feb. 20, 2026
Interest rate (%) 4.11%
Amounts issued for the subsequent period ₩ 160,000
1365 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 03, 2023
Maturiy Mar. 03, 2025
Interest rate (%) 4.35%
Amounts issued for the subsequent period ₩ 100,000
1366 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 03, 2023
Maturiy Mar. 03, 2026
Interest rate (%) 4.40%
Amounts issued for the subsequent period ₩ 110,000
1367 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 06, 2023
Maturiy Mar. 06, 2025
Interest rate (%) 4.25%
Amounts issued for the subsequent period ₩ 180,000
1368 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 06, 2023
Maturiy Mar. 06, 2026
Interest rate (%) 4.35%
Amounts issued for the subsequent period ₩ 210,000
1369 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 10, 2023
Maturiy Mar. 10, 2025
Interest rate (%) 4.25%
Amounts issued for the subsequent period ₩ 230,000
1370 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 10, 2023
Maturiy Mar. 10, 2026
Interest rate (%) 4.35%
Amounts issued for the subsequent period ₩ 230,000
1371 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 13, 2023
Maturiy Mar. 13, 2025
Interest rate (%) 4.14%
Amounts issued for the subsequent period ₩ 140,000
1372 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 13, 2023
Maturiy Mar. 13, 2026
Interest rate (%) 4.25%
Amounts issued for the subsequent period ₩ 260,000
1373 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 22, 2023
Maturiy Mar. 22, 2025
Interest rate (%) 3.97%
Amounts issued for the subsequent period ₩ 160,000
1374 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 22, 2023
Maturiy Mar. 22, 2026
Interest rate (%) 4.00%
Amounts issued for the subsequent period ₩ 70,000
1375 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 30, 2023
Maturiy Mar. 30, 2025
Interest rate (%) 3.98%
Amounts issued for the subsequent period ₩ 240,000
1376 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Mar. 30, 2023
Maturiy Mar. 30, 2026
Interest rate (%) 3.99%
Amounts issued for the subsequent period ₩ 160,000
1377 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 04, 2023
Maturiy Apr. 04, 2025
Interest rate (%) 3.99%
Amounts issued for the subsequent period ₩ 270,000
1378 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 04, 2023
Maturiy Apr. 04, 2026
Interest rate (%) 4.00%
Amounts issued for the subsequent period ₩ 260,000
1379 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 07, 2023
Maturiy Apr. 07, 2025
Interest rate (%) 3.95%
Amounts issued for the subsequent period ₩ 210,000
1380 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 07, 2023
Maturiy Apr. 07, 2026
Interest rate (%) 3.95%
Amounts issued for the subsequent period ₩ 190,000
1381 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 12, 2023
Maturiy Apr. 12, 2025
Interest rate (%) 3.91%
Amounts issued for the subsequent period ₩ 240,000
1382 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 12, 2023
Maturiy Apr. 12, 2026
Interest rate (%) 3.95%
Amounts issued for the subsequent period ₩ 170,000
1383 Corporate Bond  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Electric Power Corporation
Issue date Apr. 21, 2023
Maturiy Apr. 21, 2025
Interest rate (%) 3.89%
Amounts issued for the subsequent period ₩ 200,000
70-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Feb. 22, 2023
Maturiy Feb. 22, 2028
Interest rate (%) 4.10%
Amounts issued for the subsequent period ₩ 90,000
70-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Feb. 22, 2023
Maturiy Feb. 22, 2033
Interest rate (%) 4.15%
Amounts issued for the subsequent period ₩ 40,000
70-3 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Feb. 22, 2023
Maturiy Feb. 22, 2043
Interest rate (%) 4.08%
Amounts issued for the subsequent period ₩ 20,000
71-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Mar. 07, 2023
Maturiy Mar. 07, 2028
Interest rate (%) 4.13%
Amounts issued for the subsequent period ₩ 50,000
71-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Mar. 07, 2023
Maturiy Mar. 07, 2033
Interest rate (%) 4.18%
Amounts issued for the subsequent period ₩ 30,000
72-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Apr. 26, 2023
Maturiy Apr. 26, 2028
Interest rate (%) 3.91%
Amounts issued for the subsequent period ₩ 130,000
72-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Hydro & Nuclear Power Co., Ltd.
Issue date Apr. 26, 2023
Maturiy Apr. 26, 2043
Interest rate (%) 4.00%
Amounts issued for the subsequent period ₩ 90,000
57-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea South-East Power Co., Ltd.
Issue date Feb. 09, 2023
Maturiy Feb. 08, 2024
Interest rate (%) 3.56%
Amounts issued for the subsequent period ₩ 120,000
57-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea South-East Power Co., Ltd.
Issue date Feb. 09, 2023
Maturiy Feb. 09, 2026
Interest rate (%) 3.74%
Amounts issued for the subsequent period ₩ 50,000
57-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Western Power Co., Ltd.
Issue date Jan. 17, 2023
Maturiy Jan. 17, 2025
Interest rate (%) 4.07%
Amounts issued for the subsequent period ₩ 70,000
57-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Western Power Co., Ltd.
Issue date Jan. 17, 2023
Maturiy Jan. 17, 2026
Interest rate (%) 4.04%
Amounts issued for the subsequent period ₩ 30,000
58-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Western Power Co., Ltd.
Issue date Apr. 20, 2023
Maturiy Apr. 20, 2026
Interest rate (%) 3.98%
Amounts issued for the subsequent period ₩ 200,000
58-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Western Power Co., Ltd.
Issue date Apr. 20, 2023
Maturiy Apr. 20, 2028
Interest rate (%) 4.13%
Amounts issued for the subsequent period ₩ 40,000
58-3 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Western Power Co., Ltd.
Issue date Apr. 20, 2023
Maturiy Apr. 20, 2043
Interest rate (%) 3.94%
Amounts issued for the subsequent period ₩ 20,000
67-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Southern Power Co., Ltd.
Issue date Jan. 12, 2023
Maturiy Jan. 12, 2024
Interest rate (%) 3.97%
Amounts issued for the subsequent period ₩ 100,000
67-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Southern Power Co., Ltd.
Issue date Jan. 12, 2023
Maturiy Jan. 10, 2025
Interest rate (%) 4.04%
Amounts issued for the subsequent period ₩ 40,000
68-1 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Southern Power Co., Ltd.
Issue date Apr. 13, 2023
Maturiy Apr. 12, 2024
Interest rate (%) 3.63%
Amounts issued for the subsequent period ₩ 150,000
68-2 Corporate Bonds  
Disclosure of non-adjusting events after reporting period [line items]  
Company name Korea Southern Power Co., Ltd.
Issue date Apr. 13, 2023
Maturiy Apr. 13, 2026
Interest rate (%) 3.76%
Amounts issued for the subsequent period ₩ 50,000