XML 119 R104.htm IDEA: XBRL DOCUMENT
v3.25.1

Risk Management (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Risk Management [Abstract] |
Summary of Capital Risk Management | Details of the Company’s capital management accounts as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
|  |  |  |  | In millions of won |
Total borrowings and debt securities |  | ￦ |  |  |  |  | 133,631,830 |  |  |  | 132,533,400 |
Cash and cash equivalents |  |  |  |  |  |  | 4,342,887 |  |  |  | 2,382,979 |
Net borrowings and debt securities |  |  |  |  |  |  | 129,288,943 |  |  |  | 130,150,421 |
Total equity |  |  |  |  |  |  | 37,264,750 |  |  |  | 41,362,833 |
Debt to equity ratio |  |  |  |  |  |  | 346.95 | % |  |  | 314.66 | %
Summary of Maximum Exposure to Credit Risk | Book values of the financial assets represent the maximum exposed amounts of the credit risk. Details of the Company’s level of maximum exposure to credit risk as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
|  |  |  |  | In millions of won |
Cash and cash equivalents |  | ￦ |  |  |  |  | 4,342,887 |  |  |  | 2,382,979 |
Financial assets at fair value through profit or loss (*1) |  |  |  |  |  |  | 2,590,228 |  |  |  | 2,013,948 |
Derivative assets (trading) |  |  |  |  |  |  | 730,948 |  |  |  | 1,846,527 |
Financial assets at fair value through other comprehensive income (debt securities) |  |  |  |  |  |  | 4,627 |  |  |  | 5,045 |
Financial assets at amortized cost |  |  |  |  |  |  | 38,843 |  |  |  | 30,233 |
Loans |  |  |  |  |  |  | 988,331 |  |  |  | 908,148 |
Long-term/short-term financial instruments |  |  |  |  |  |  | 1,412,315 |  |  |  | 1,960,140 |
Derivative assets (applying hedge accounting) |  |  |  |  |  |  | 269,446 |  |  |  | 844,637 |
Trade and other receivables |  |  |  |  |  |  | 14,179,322 |  |  |  | 15,373,625 |
Financial guarantee contracts (*2) |  |  |  |  |  |  | 4,399,189 |  |  |  | 5,151,554 |
| (*1) | Equity investments held by the Company are excluded.
| (*2) | Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation.
Summary of Sensitivity Analysis for Actuarial Assumptions | A sensitivity analysis of defined benefit obligation assuming a 1% increase and decrease movements in the actuarial valuation assumptions as of December 31, 2023 and 2024 are as follows:
|  |  |  |  |  |  | 2023 |  |  | 2024 |
Type |  | Accounts |  |  |  |  | 1% Increase |  |  | 1% Decrease |  |  | 1% Increase |  |  | 1% Decrease |
|  |  |  |  |  |  | In millions of won |
Future salary increases |  | Increase (decrease) in defined benefit obligation |  | ￦ |  |  |  |  | 392,392 |  |  |  | (361,359 | ) |  |  | 473,627 |  |  |  | (413,799 | )
Discount rate |  | Increase (decrease) in defined benefit obligation |  |  |  |  |  |  | (371,103 | ) |  |  | 415,361 |  |  |  | (429,517 | ) |  |  | 506,031 |
Summary of Principal Assumptions on Provisions Valuation | Changes in provisions due to movements in underlying assumptions as of December 31, 2023 and 2024 are as follows:
Type |  | Accounts |  | 2023 |  |  | 2024 |
PCBs |  | Inflation rate |  |  | 2.40 | % |  |  | 2.80 | %
|  | Discount rate |  |  | 2.12 | % |  |  | 2.90 | %
Nuclear plants |  | Inflation rate |  |  | 1.91 | % |  |  | 2.02 | %
|  | Discount rate |  |  | 2.76 | % |  |  | 2.78 | %
Spent fuel |  | Inflation rate |  |  | 1.91 | % |  |  | 1.91 | %
|  | Discount rate |  |  | 2.49 | % |  |  | 2.49 | %
Radioactive waste |  | Inflation rate |  |  | 3.89 | % |  |  | 3.32 | %
|  | Discount rate |  |  | 3.65 | % |  |  | 4.17 | %
Summary of Sensitivity Analysis for Provisions Assumptions | A sensitivity analysis of provisions assuming a 0.1% increase and decrease movements in the underlying assumptions as of December 31, 2023 and 2024 are as follows:
|  |  |  |  |  |  | 2023 |  |  | 2024 |
Type |  | Accounts |  |  |  |  | 0.1%p Increase |  |  | 0.1%p Decrease |  |  | 0.1%p Increase |  |  | 0.1%p Decrease |
|  |  |  |  |  |  | In millions of won |
Discount rate |  | PCBs |  | ￦ |  |  |  |  | (123 | ) |  |  | 123 |  |  |  | (58 | ) |  |  | 58 |
|  | Nuclear plants |  |  |  |  |  |  | (418,570 | ) |  |  | 432,847 |  |  |  | (464,727 | ) |  |  | 481,899 |
|  | Spent fuel |  |  |  |  |  |  | (130,065 | ) |  |  | 130,761 |  |  |  | (129,983 | ) |  |  | 130,679 |
|  | Radioactive waste |  |  |  |  |  |  | (13,538 | ) |  |  | 13,683 |  |  |  | (11,363 | ) |  |  | 11,478 |
Inflation rate |  | PCBs |  |  |  |  |  |  | 123 |  |  |  | (123 | ) |  |  | 58 |  |  |  | (58 | )
|  | Nuclear plants |  |  |  |  |  |  | 458,047 |  |  |  | (443,531 | ) |  |  | 507,814 |  |  |  | (490,386 | )
|  | Spent fuel |  |  |  |  |  |  | 133,931 |  |  |  | (128,607 | ) |  |  | 133,847 |  |  |  | (128,527 | )
|  | Radioactive waste |  |  |  |  |  |  | 13,291 |  |  |  | (13,174 | ) |  |  | 11,167 |  |  |  | (11,075 | )
Summary of Foreign Currency Risk | The Company undertakes transactions denominated in foreign currencies; consequently, exposures to exchange rate fluctuations arise. The carrying amounts of the Company’s foreign currency denominated monetary assets and monetary liabilities as of December 31, 2023 and 2024 are as follows:
|  |  | Assets |  |  |  | Liabilities |
Type |  | 2023 |  |  | 2024 |  |  | 2023 |  |  | 2024 |
|  | In thousands of foreign currencies |
AED |  |  | 24,441 |  |  |  | 33,465 |  |  |  | 18,143 |  |  |  | 8,795 |
AUD |  |  | 4,310 |  |  |  | 26 |  |  |  | 299,795 |  |  |  | 64 |
BDT |  |  | 2,260 |  |  |  | 2,252 |  |  |  | — |  |  |  | — |
BWP |  |  | 777 |  |  |  | 768 |  |  |  | — |  |  |  | — |
EGP |  |  | 1,665 |  |  |  | 203,044 |  |  |  | 1,941 |  |  |  | — |
CAD |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 61 |
CHF |  |  | — |  |  |  | — |  |  |  | 499,930 |  |  |  | 100,686 |
DOP |  |  | — |  |  |  | 7,772 |  |  |  | — |  |  |  | — |
EUR |  |  | 12,259 |  |  |  | 20,433 |  |  |  | 81,744 |  |  |  | 47,829 |
GBP |  |  | 75 |  |  |  | 139 |  |  |  | — |  |  |  | 4 |
HKD |  |  | — |  |  |  | — |  |  |  | 5,079,189 |  |  |  | 5,093,862 |
IDR |  |  | 25,567,281 |  |  |  | 37,830,902 |  |  |  | 2,118,580 |  |  |  | 4,027,099 |
INR |  |  | 1,663,705 |  |  |  | 1,037,437 |  |  |  | 387,947 |  |  |  | 225,042 |
JOD |  |  | 569 |  |  |  | 902 |  |  |  | 68,448 |  |  |  | 49,128 |
JPY |  |  | 921,120 |  |  |  | 23,798 |  |  |  | 8,692,604 |  |  |  | 7,483,199 |
KZT |  |  | 1,510 |  |  |  | 1,510 |  |  |  | — |  |  |  | — |
MGA |  |  | 3,545,076 |  |  |  | 5,452,745 |  |  |  | 495,288 |  |  |  | 248,175 |
MMK |  |  | 199,518 |  |  |  | 188,021 |  |  |  | — |  |  |  | — |
MYR |  |  | 2,805 |  |  |  | 2,805 |  |  |  | — |  |  |  | — |
PHP |  |  | 98,154 |  |  |  | 19,401 |  |  |  | 6,750 |  |  |  | — |
PKR |  |  | 75,206,354 |  |  |  | 68,734,242 |  |  |  | 55,531 |  |  |  | 10,418 |
SAR |  |  | 937 |  |  |  | 1,087 |  |  |  | — |  |  |  | — |
SEK |  |  | — |  |  |  | — |  |  |  | 452,309 |  |  |  | 449,302 |
SGD |  |  | 279 |  |  |  | 291 |  |  |  | 2,191 |  |  |  | 110 |
USD |  |  | 1,701,494 |  |  |  | 1,651,765 |  |  |  | 14,458,985 |  |  |  | 15,364,685 |
UYU |  |  | 120,768 |  |  |  | 99,189 |  |  |  | 2,028 |  |  |  | 1,141 |
VND |  |  | 848,242 |  |  |  | 733,338 |  |  |  | — |  |  |  | 587,003 |
ZAR |  |  | 87,780 |  |  |  | 79,897 |  |  |  | — |  |  |  | — |
Summary of Sensitivity Analysis for Foreign Currency Exchange Rates | A sensitivity analysis on the Company’s income for the period assuming a 10% increase and decrease in currency exchange rates as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
Type |  |  |  |  | 10% Increase |  |  | 10% Decrease |  |  | 10% Increase |  |  | 10% Decrease |
|  |  |  |  | In millions of won |
Increase (decrease) of profit before income tax |  | ￦ |  |  |  |  | (1,828,308 | ) |  |  | 1,828,308 |  |  |  | (2,114,808 | ) |  |  | 2,114,808 |
Increase (decrease) of equity (*) |  |  |  |  |  |  | (1,828,308 | ) |  |  | 1,828,308 |  |  |  | (2,114,808 | ) |  |  | 2,114,808 |
| (*) | The effect on the shareholders’ equity excluding the impact of income taxes.
Summary of Interest Rate Risk | The Company’s borrowings and debt securities with floating interest rates as of December 31, 2023 and 2024 are as follows:
Type |  |  |  |  | 2023 |  |  | 2024 |
|  |  |  |  | In millions of won |
Short-term borrowings |  | ￦ |  |  |  |  | 4,435,420 |  |  |  | 4,069,444 |
Long-term borrowings |  |  |  |  |  |  | 7,766,588 |  |  |  | 10,112,707 |
Debt securities |  |  |  |  |  |  | 305,602 |  |  |  | 41,578 |
|  | ￦ |  |  |  |  | 12,507,610 |  |  |  | 14,223,729 |
Summary of Sensitivity Analysis for Interest Rates | A sensitivity analysis on the Company’s long-term borrowings and debt securities assuming a 1% increase and decrease in interest for the years ended December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
Type |  |  |  |  | 1%p Increase |  |  | 1%p Decrease |  |  | 1%p Increase |  |  | 1%p Decrease |
|  |  |  |  | In millions of won |
Increase (decrease) of profit before income tax |  | ￦ |  |  |  |  | (125,076 | ) |  |  | 125,076 |  |  |  | (142,237 | ) |  |  | 142,237 |
Increase (decrease) of shareholder’s equity (*) |  |  |  |  |  |  | (125,076 | ) |  |  | 125,076 |  |  |  | (142,237 | ) |  |  | 142,237 |
| (*) | The effect on the shareholders’ equity excluding the impact of income taxes.
Summary of Sensitivity Analysis for Electricity Rates | A sensitivity analysis on the Company’s income for the period assuming a 1% increase and decrease in price of electricity for the years ended December 31, 2023 and 2024 is as follows:
|  |  |  |  | 2023 |  |  | 2024 |
Type |  |  |  |  | 1% Increase |  |  | 1% Decrease |  |  | 1% Increase |  |  | 1% Decrease |
|  |  |  |  | In millions of won |
Increase (decrease) of profit before income tax |  | ￦ |  |  |  |  | 829,548 |  |  |  | (829,548 | ) |  |  | 888,898 |  |  |  | (888,898 | )
Increase (decrease) of shareholder’s equity (*) |  |  |  |  |  |  | 829,548 |  |  |  | (829,548 | ) |  |  | 888,898 |  |  |  | (888,898 | )
| (*) | The effect on the equity excluding the impact of income taxes.
Summary of Maturity Analysis for Non Derivative Financial Liabilities | The expected maturities for non-derivative financial liabilities as of December 31, 2023 and 2024 in detail are as follows:
|  |  |  |  | 2023 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Borrowings |  | ￦ |  |  |  |  | 20,347,945 |  |  |  | 187,896 |  |  |  | 627,467 |  |  |  | 2,779,241 |  |  |  | 23,942,549 |
Debt securities |  |  |  |  |  |  | 30,530,984 |  |  |  | 28,858,140 |  |  |  | 41,793,383 |  |  |  | 29,999,589 |  |  |  | 131,182,096 |
Lease liabilities |  |  |  |  |  |  | 641,525 |  |  |  | 588,850 |  |  |  | 1,309,995 |  |  |  | 1,694,730 |  |  |  | 4,235,100 |
Trade and other payables (*1) |  |  |  |  |  |  | 8,477,209 |  |  |  | 364,443 |  |  |  | 833,394 |  |  |  | 589,004 |  |  |  | 10,264,050 |
Financial guarantee contracts (*2) |  |  |  |  |  |  | 121,415 |  |  |  | 2,546,689 |  |  |  | 1,645,488 |  |  |  | 85,597 |  |  |  | 4,399,189 |
|  | ￦ |  |  |  |  | 60,119,078 |  |  |  | 32,546,018 |  |  |  | 46,209,727 |  |  |  | 35,148,161 |  |  |  | 174,022,984 |
|  |  |  |  | 2024 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Borrowings |  | ￦ |  |  |  |  | 18,887,527 |  |  |  | 430,883 |  |  |  | 1,300,087 |  |  |  | 2,032,303 |  |  |  | 22,650,800 |
Debt securities |  |  |  |  |  |  | 28,967,125 |  |  |  | 29,601,867 |  |  |  | 39,451,207 |  |  |  | 28,885,833 |  |  |  | 126,906,032 |
Lease liabilities |  |  |  |  |  |  | 632,878 |  |  |  | 553,030 |  |  |  | 1,264,310 |  |  |  | 1,670,416 |  |  |  | 4,120,634 |
Trade and other payables (*1) |  |  |  |  |  |  | 8,807,823 |  |  |  | 354,778 |  |  |  | 631,653 |  |  |  | 526,846 |  |  |  | 10,321,100 |
Financial guarantee contracts (*2) |  |  |  |  |  |  | 3,156,187 |  |  |  | 1,712,801 |  |  |  | 270,806 |  |  |  | 11,760 |  |  |  | 5,151,554 |
|  | ￦ |  |  |  |  | 60,451,540 |  |  |  | 32,653,359 |  |  |  | 42,918,063 |  |  |  | 33,127,158 |  |  |  | 169,150,120 |
| (*1) | Excludes lease liabilities.
| (*2) | This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2023 and 2024 are ￦49,992 and ￦30,924 million, respectively.
Summary of Maturity Analysis for Non Derivative Financial Assets | The expected maturities for non-derivative financial assets as of December 31, 2023 and 2024 in detail are as follows:
|  |  |  |  | 2023 |
Type |  |  |  |  | Less than 1 year |  |  | 1~5 Years |  |  | More than 5 years |  |  | Other (*) |  |  | Total |
|  |  |  |  | In millions of won |
Cash and cash equivalents |  | ￦ |  |  |  |  | 4,342,887 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 4,342,887 |
Financial assets at fair value through other comprehensive income |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 502,443 |  |  |  | 502,443 |
Financial assets at amortized cost |  |  |  |  |  |  | 28,905 |  |  |  | 9,938 |  |  |  | — |  |  |  | — |  |  |  | 38,843 |
Loans |  |  |  |  |  |  | 139,168 |  |  |  | 465,666 |  |  |  | 411,100 |  |  |  | 8,872 |  |  |  | 1,024,806 |
Long-term/short-term financial instruments |  |  |  |  |  |  | 578,578 |  |  |  | 22 |  |  |  | 23 |  |  |  | 833,692 |  |  |  | 1,412,315 |
Financial assets at fair value through profit or loss |  |  |  |  |  |  | 2,054,021 |  |  |  | 1,381 |  |  |  | 6,523 |  |  |  | 649,360 |  |  |  | 2,711,285 |
Trade and other receivables |  |  |  |  |  |  | 11,990,515 |  |  |  | 911,822 |  |  |  | 1,292,539 |  |  |  | 1,280 |  |  |  | 14,196,156 |
|  | ￦ |  |  |  |  | 19,134,074 |  |  |  | 1,388,829 |  |  |  | 1,710,185 |  |  |  | 1,995,647 |  |  |  | 24,228,735 |
|  |  |  |  | 2024 |
Type |  |  |  |  | Less than 1 year |  |  | 1~5 Years |  |  | More than 5 years |  |  | Other (*) |  |  | Total |
|  |  |  |  | In millions of won |
Cash and cash equivalents |  | ￦ |  |  |  |  | 2,382,979 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,382,979 |
Financial assets at fair value through other comprehensive income |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 674,850 |  |  |  | 674,850 |
Financial assets at amortized cost |  |  |  |  |  |  | 20,418 |  |  |  | 1,333 |  |  |  | 8,482 |  |  |  | — |  |  |  | 30,233 |
Loans |  |  |  |  |  |  | 110,005 |  |  |  | 347,251 |  |  |  | 369,851 |  |  |  | 118,013 |  |  |  | 945,120 |
Long-term/short-term financial instruments |  |  |  |  |  |  | 1,147,929 |  |  |  | 583 |  |  |  | — |  |  |  | 811,628 |  |  |  | 1,960,140 |
Financial assets at fair value through profit or loss |  |  |  |  |  |  | 1,467,954 |  |  |  | 346,982 |  |  |  | 780,130 |  |  |  | 494,710 |  |  |  | 3,089,776 |
Trade and other receivables |  |  |  |  |  |  | 12,245,159 |  |  |  | 1,506,085 |  |  |  | 2,126,928 |  |  |  | — |  |  |  | 15,878,172 |
|  | ￦ |  |  |  |  | 17,374,444 |  |  |  | 2,202,234 |  |  |  | 3,285,391 |  |  |  | 2,099,201 |  |  |  | 24,961,270 |
| (*) | The maturities cannot be presently determined.
Summary of Maturity Analysis for Derivative, Undiscounted Cash Flows | Derivative liabilities classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Net settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  | ￦ |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading and others |  |  |  |  |  |  | (22,571 | ) |  |  | (11,566 | ) |  |  | (201,590 | ) |  |  | (130,119 | ) |  |  | (365,846 | )
— Hedging |  |  |  |  |  |  | — |  |  |  | (4,680 | ) |  |  | (13,243 | ) |  |  | (5,641 | ) |  |  | (23,564 | )
|  | ￦ |  |  |  |  | (22,571) |  |  |  | (16,246 | ) |  |  | (214,833) |  |  |  | (135,760 | ) |  |  | (389,410 | )
|  |  |  |  | 2024 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Net settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  | ￦ |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading and others |  |  |  |  |  |  | (46,087 | ) |  |  | (61,259 | ) |  |  | (73,017 | ) |  |  | (31,760 | ) |  |  | (212,123 | )
— Hedging |  |  |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (4,895 | ) |  |  | (4,895 | )
|  | ￦ |  |  |  |  | (46,087) |  |  |  | (61,259 | ) |  |  | (73,017) |  |  |  | (36,655 | ) |  |  | (217,018 | )
Summary of Maturity Analysis for Derivative Financial Assets | Derivative assets classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Net settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  | ￦ |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  |  |  |  |  |  | 257,073 |  |  |  | 123,132 |  |  |  | 169,004 |  |  |  | 145,728 |  |  |  | 694,937 |
— Hedging |  |  |  |  |  |  | 78,769 |  |  |  | 61,031 |  |  |  | 131,687 |  |  |  | — |  |  |  | 271,487 |
|  | ￦ |  |  |  |  | 335,842 |  |  |  | 184,163 |  |  |  | 300,691 |  |  |  | 145,728 |  |  |  | 966,424 |
|  |  |  |  | 2024 |
Type |  |  |  |  | Less than 1 year |  |  | 1~2 Years |  |  | 2~5 Years |  |  | More than 5 years |  |  | Total |
|  |  |  |  | In millions of won |
Net settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  | ￦ |  |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Gross settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
— Trading |  |  |  |  |  |  | 481,359 |  |  |  | 685,807 |  |  |  | 689,026 |  |  |  | 91,324 |  |  |  | 1,947,516 |
— Hedging |  |  |  |  |  |  | 363,184 |  |  |  | 354,837 |  |  |  | 113,958 |  |  |  | 6,213 |  |  |  | 838,192 |
|  | ￦ |  |  |  |  | 844,543 |  |  |  | 1,040,644 |  |  |  | 802,984 |  |  |  | 97,537 |  |  |  | 2,785,708 |
Summary of Fair Value Measurement of Instruments |
| (i) | Fair value and book value of financial assets and liabilities as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
Type |  |  |  |  | Book value |  |  | Fair value |  |  | Book value |  |  | Fair value |
|  |  |  |  | In millions of won |
Assets recognized at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ |  |  |  |  | 502,443 |  |  |  | 502,443 |  |  |  | 674,850 |  |  |  | 674,850 |
Derivative assets (trading) |  |  |  |  |  |  | 730,948 |  |  |  | 730,948 |  |  |  | 1,846,527 |  |  |  | 1,846,527 |
Derivative assets (hedge designated) |  |  |  |  |  |  | 269,446 |  |  |  | 269,446 |  |  |  | 844,637 |  |  |  | 844,637 |
Financial assets at fair value through profit or loss |  |  |  |  |  |  | 2,711,285 |  |  |  | 2,711,285 |  |  |  | 2,176,172 |  |  |  | 2,176,172 |
|  | ￦ |  |  |  |  | 4,214,122 |  |  |  | 4,214,122 |  |  |  | 5,542,186 |  |  |  | 5,542,186 |
Assets carried at amortized cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at amortized cost |  | ￦ |  |  |  |  | 38,843 |  |  |  | 38,843 |  |  |  | 30,233 |  |  |  | 30,233 |
Loans and receivables |  |  |  |  |  |  | 988,331 |  |  |  | 988,331 |  |  |  | 908,148 |  |  |  | 908,148 |
Trade and other receivables |  |  |  |  |  |  | 14,179,322 |  |  |  | 14,179,322 |  |  |  | 15,373,625 |  |  |  | 15,373,625 |
Long-term financial instruments |  |  |  |  |  |  | 833,737 |  |  |  | 833,737 |  |  |  | 812,211 |  |  |  | 812,211 |
Short-term financial instruments |  |  |  |  |  |  | 578,578 |  |  |  | 578,578 |  |  |  | 1,147,929 |  |  |  | 1,147,929 |
Cash and cash equivalents |  |  |  |  |  |  | 4,342,887 |  |  |  | 4,342,887 |  |  |  | 2,382,979 |  |  |  | 2,382,979 |
|  | ￦ |  |  |  |  | 20,961,698 |  |  |  | 20,961,698 |  |  |  | 20,655,125 |  |  |  | 20,655,125 |
Liabilities recognized at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities (trading) |  | ￦ |  |  |  |  | 428,670 |  |  |  | 428,670 |  |  |  | 279,932 |  |  |  | 279,932 |
Derivative liabilities (hedge designated) |  |  |  |  |  |  | 23,564 |  |  |  | 23,564 |  |  |  | 4,893 |  |  |  | 4,893 |
|  | ￦ |  |  |  |  | 452,234 |  |  |  | 452,234 |  |  |  | 284,825 |  |  |  | 284,825 |
Liabilities carried at amortized cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured borrowings |  | ￦ |  |  |  |  | 773,646 |  |  |  | 773,646 |  |  |  | 1,443,125 |  |  |  | 1,443,125 |
Unsecured bond |  |  |  |  |  |  | 113,792,178 |  |  |  | 111,218,771 |  |  |  | 111,874,019 |  |  |  | 110,798,858 |
Lease liabilities |  |  |  |  |  |  | 3,807,880 |  |  |  | 3,807,880 |  |  |  | 3,699,456 |  |  |  | 3,699,456 |
Unsecured borrowings |  |  |  |  |  |  | 19,062,162 |  |  |  | 19,061,348 |  |  |  | 19,040,213 |  |  |  | 18,994,676 |
Trade and other payables (*) |  |  |  |  |  |  | 10,264,050 |  |  |  | 10,264,050 |  |  |  | 10,321,100 |  |  |  | 10,321,100 |
Bank overdraft |  |  |  |  |  |  | 3,844 |  |  |  | 3,844 |  |  |  | 176,043 |  |  |  | 176,043 |
|  | ￦ |  |  |  |  | 147,703,760 |  |  |  | 145,129,539 |  |  |  | 146,553,956 |  |  |  | 145,433,258 |
| (*) | Excludes lease liabilities.
Summary of Significant Unobservable Inputs Used in Fair Value Measurement of Financial Instruments | The discount rates used for calculating fair value as of December 31, 2023 and 2024 are as follows:
Type |  | 2023 |  |  | 2024 |
Derivatives |  |  | 0.93% ~ 4.76% |  |  |  | 0.03% ~ 4.88% |
Borrowings and debt securities |  |  | 0.96% ~ 5.84% |  |  |  | 0.96% ~ 5.84% |
Finance lease |  |  | 0.00% ~ 17.03% |  |  |  | 0.00% ~ 17.15% |
Summary of Fair Value Measurement of Financial Instruments | Fair values of financial instruments by hierarchy level as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |
Type |  |  |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
|  |  |  |  | In millions of won |
Financial assets at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ |  |  |  |  | 285,054 |  |  |  | — |  |  |  | 217,389 |  |  |  | 502,443 |
Derivative assets |  |  |  |  |  |  | — |  |  |  | 1,000,394 |  |  |  | — |  |  |  | 1,000,394 |
Financial assets at fair value through profit or loss |  |  |  |  |  |  | — |  |  |  | 2,704,550 |  |  |  | 6,735 |  |  |  | 2,711,285 |
|  | ￦ |  |  |  |  | 285,054 |  |  |  | 3,704,944 |  |  |  | 224,124 |  |  |  | 4,214,122 |
Financial liabilities at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities |  | ￦ |  |  |  |  | — |  |  |  | 452,234 |  |  |  | — |  |  |  | 452,234 |
|  |  |  |  | 2024 |
Type |  |  |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
|  |  |  |  |  |  | In millions of won |
Financial assets at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ |  |  |  |  | 360,096 |  |  |  | — |  |  |  | 314,754 |  |  |  | 674,850 |
Derivative assets |  |  |  |  |  |  | — |  |  |  | 2,691,164 |  |  |  | — |  |  |  | 2,691,164 |
Financial assets at fair value through profit or loss |  |  |  |  |  |  | — |  |  |  | 2,169,300 |  |  |  | 6,872 |  |  |  | 2,176,172 |
|  | ￦ |  |  |  |  | 360,096 |  |  |  | 4,860,464 |  |  |  | 321,626 |  |  |  | 5,542,186 |
Financial liabilities at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities |  | ￦ |  |  |  |  | — |  |  |  | 284,825 |  |  |  | — |  |  |  | 284,825 |
Summary of Reconciliation of Changes in Fair Value Measurement, Assets | Changes of financial assets and liabilities which are classified as level 3 for the years ended December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |
|  |  |  |  | Beginning balance |  |  | Acquisitions |  |  | Reclassified category |  |  | Valuation |  |  | Disposal |  |  | Foreign currency translation and others |  |  | Ending balance |
|  |  |  |  | In millions of won |
Financial assets at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss Cooperative |  | ￦ |  |  |  |  | 6,329 |  |  |  | — |  |  |  | 270 |  |  |  | 136 |  |  |  | — |  |  |  | — |  |  |  | 6,735 |
Financial assets at fair value through other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unlisted securities |  |  |  |  |  |  | 202,243 |  |  |  | 9,550 |  |  |  | — |  |  |  | 5,445 |  |  |  | (5,332 | ) |  |  | 856 |  |  |  | 212,762 |
Debt securities |  |  |  |  |  |  | 529 |  |  |  | 4,080 |  |  |  | — |  |  |  | 18 |  |  |  | — |  |  |  | — |  |  |  | 4,627 |
|  |  |  |  | 2024 |
|  |  |  |  | Beginning balance |  |  | Acquisitions |  |  | Reclassified category |  |  | Valuation |  |  | Disposal |  |  | Foreign currency translation and others |  |  | Ending balance |
|  |  |  |  | In millions of won |
Financial assets at fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss Cooperative |  | ￦ |  |  |  |  | 6,735 |  |  |  | — |  |  |  | 22 |  |  |  | 115 |  |  |  | — |  |  |  | — |  |  |  | 6,872 |
Financial assets at fair value through other comprehensive income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unlisted securities |  |  |  |  |  |  | 212,762 |  |  |  | 4,000 |  |  |  | — |  |  |  | 88,256 |  |  |  | — |  |  |  | 4,691 |  |  |  | 309,709 |
Debt securities |  |  |  |  |  |  | 4,627 |  |  |  | — |  |  |  | — |  |  |  | 418 |  |  |  | — |  |  |  | — |  |  |  | 5,045 |

X
- Definition The disclosure of an analysis of the present value of a defined benefit obligation that distinguishes the nature, characteristics and risks of the obligation. Such a disclosure could distinguish: (a) between amounts owing to active members, deferred members, and pensioners; (b) between vested benefits and accrued but not vested benefits; and (c) between conditional benefits, amounts attributable to future salary increases and other benefits. [Refer: Defined benefit obligation, at present value] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 137 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_137&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DisclosureOfAnalysisOfPresentValueOfDefinedBenefitObligationThatDistinguishesNatureCharacteristicsAndRisksExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of credit risk. [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Section Credit risk -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS07_g35A-38_TI -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_10_e&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DisclosureOfCreditRiskExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for the effect of changes in foreign exchange rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2024-01-01 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS21_g51-57_TI -URIDate 2024-03-27 + Details
Name: | ifrs-full_DisclosureOfEffectOfChangesInForeignExchangeRatesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for fair value measurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2024-01-01 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS13_g91-99_TI -URIDate 2024-03-27 + Details
Name: | ifrs-full_DisclosureOfFairValueMeasurementExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the fair value of financial instruments. [Refer: Classes of financial instruments [domain]; At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 10 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_10_e&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DisclosureOfFairValueOfFinancialInstrumentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a maturity analysis for derivative financial liabilities, including the remaining contractual maturities for those derivative financial liabilities for which contractual maturities are essential for an understanding of the timing of the cash flows. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 39 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_39_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_MaturityAnalysisForDerivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a maturity analysis for non-derivative financial liabilities (including issued financial guarantee contracts) that shows the remaining contractual maturities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 39 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_39_a&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_MaturityAnalysisForNonderivativeFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_ChangesInProvisionsDueToMovementsInUnderlyingAssumptionsExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_DisclosureOfCapitalRiskExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_DisclosureOfChangesOfFinancialInstrumentsWhichAreClassifiedAsLevel3Explanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_DisclosureOfRiskManagementAbstract
Namespace Prefix: | kep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of significant unobservable inputs used in fair value measurement of financial instruments explanatory. + References No definition available. + Details
Name: | kep_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfFinancialInstrumentsExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_ElectricityRateRiskExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign Currency Disclosure + References No definition available. + Details
Name: | kep_ForeignCurrencyDisclosureTableTextBlock
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_InterestRateRiskExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_MaturityAnalysisForDerivativeFinancialAssets
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_MaturityAnalysisForNonderivativeFinancialAssets
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_SensitivityAnalysisOfInterestRateRiskExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_SensitivityAnalysisOfProvisionsDueToMovementsInUnderlyingAssumptionsExplanatory
Namespace Prefix: | kep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration