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Borrowings and Debt Securities - Local Debt Securities and Foreign Debt Securities (Details) € in Thousands, kr in Thousands, SFr in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 KRW (₩) | Dec. 31, 2021 KRW (₩) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 SEK (kr) | Dec. 31, 2022 HKD ($) | Dec. 31, 2022 CHF (SFr) | Dec. 31, 2022 AUD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 SEK (kr) | Dec. 31, 2021 HKD ($) | Dec. 31, 2021 CHF (SFr) | Dec. 31, 2021 AUD ($)
Local Debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 90,494,766 | ₩ 62,274,472 |  |  |  |  |  |  |  |  |  |  |  |
Less : Discount on debt securities | (56,924) | (52,723) |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion of foreign debt securities | (8,401,619) | (7,432,647) |  |  |  |  |  |  |  |  |  |  |  |
Add : Current portion of discount on debt securities | 2,344 | 2,510 |  |  |  |  |  |  |  |  |  |  |  |
Total | ₩ 82,038,567 | 54,791,612 |  |  |  |  |  |  |  |  |  |  |  |
Electricity Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2012.03.27~2022.12.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 61,190,000 | ₩ 34,080,000 |  |  |  |  |  |  |  |  |  |  |  |
Electricity Bonds | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023.01.11 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.14% |  | 1.14% | 1.14% | 1.14% | 1.14% | 1.14% | 1.14% |  |  |  |  |  |
Electricity Bonds | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2052.04.21 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.99% |  | 5.99% | 5.99% | 5.99% | 5.99% | 5.99% | 5.99% |  |  |  |  |  |
Corporate bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date |  | 2009.10.16~2022.12.20 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 29,293,188 | ₩ 28,194,472 |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023.01.11 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.01% |  | 1.01% | 1.01% | 1.01% | 1.01% | 1.01% | 1.01% |  |  |  |  |  |
Corporate bonds | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2052.08.24 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.06% |  | 6.06% | 6.06% | 6.06% | 6.06% | 6.06% | 6.06% |  |  |  |  |  |
Corporate bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2021.05.26 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2041.05.25 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.00% |  | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% |  |  |  |  |  |
Notional amount | ₩ 11,578 | 0 |  |  |  |  |  |  |  |  |  |  |  |
Foreign Debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | 14,871,549 | 11,764,298 |  |  |  |  |  |  |  |  |  |  |  |
Less : Discount on debt securities | (124,865) | (105,407) |  |  |  |  |  |  |  |  |  |  |  |
Add: Premium on foreign debt securities | 663 | 1,031 |  |  |  |  |  |  |  |  |  |  |  |
Less: Current portion of foreign debt securities | (1,803,776) | (2,220,339) |  |  |  |  |  |  |  |  |  |  |  |
Add : Current portion of discount on debt securities | 1,902 | 2,860 |  |  |  |  |  |  |  |  |  |  |  |
Total | ₩ 12,945,473 | ₩ 9,442,443 |  |  |  |  |  |  |  |  |  |  |  |
FY-96 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 1996.04.01~ 1996.12.06 | 1996.04.01~1996.12.06 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 353,198 | ₩ 330,400 | $ 278,701 |  |  |  |  |  | $ 278,701 |  |  |  |  |
FY-96 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.12.01 | 2026.12.01 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00%
FY-96 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2096.04.01 | 2096.04.01 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95% | 7.95%
FY-97 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 1997.01.31~1997.08.04 | 1997.01.31~1997.08.04 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 398,841 | ₩ 373,097 | $ 314,717 |  |  |  |  |  | $ 314,717 |  |  |  |  |
FY-97 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.02.01 | 2027.02.01 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75% | 6.75%
FY-97 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.08.01 | 2027.08.01 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00% | 7.00%
FY-04 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2004.04.23 | 2004.04.23 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2034.04.23 | 2034.04.23 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13% | 5.13%
Notional amount | ₩ 363,614 | ₩ 340,144 | $ 286,920 |  |  |  |  |  | $ 286,920 |  |  |  |  |
FY-12 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date |  | 2012.09.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2022.09.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.00% |  |  |  |  |  |  | 3.00% | 3.00% | 3.00% | 3.00% | 3.00% | 3.00%
Notional amount |  | ₩ 889,125 |  |  |  |  |  |  | $ 750,000 |  |  |  |  |
FY-14 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2014.07.30 | 2014.07.30 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2029.07.30 | 2029.07.30 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57% | 3.57%
Notional amount | ₩ 126,730 | ₩ 118,550 | $ 100,000 |  |  |  |  |  | $ 100,000 |  |  |  |  |
FY-15 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2015.06.15 | 2015.06.15 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.06.15 | 2025.06.15 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25% | 3.25%
Notional amount | ₩ 380,190 | ₩ 355,650 | $ 300,000 |  |  |  |  |  | $ 300,000 |  |  |  |  |
FY-17 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2017.07.25 | 2017.06.19~2017.07.25 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.07.25 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.13% |  | 3.13% | 3.13% | 3.13% | 3.13% | 3.13% | 3.13% |  |  |  |  |  |
Notional amount | ₩ 380,190 | ₩ 948,400 | $ 300,000 |  |  |  |  |  | $ 800,000 |  |  |  |  |
FY-17 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2022.06.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 2.63% |  |  |  |  |  |  | 2.63% | 2.63% | 2.63% | 2.63% | 2.63% | 2.63%
FY-17 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2027.07.25 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.13% |  |  |  |  |  |  | 3.13% | 3.13% | 3.13% | 3.13% | 3.13% | 3.13%
FY-17 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2017.10.30 | 2017.10.30 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2037.10.30 | 2037.10.30 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% | 1.70%
Notional amount | ₩ 54,048 | ₩ 53,694 |  | € 40,000 |  |  |  |  |  | € 40,000 |  |  |  |
FY-17 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2017.11.16 | 2017.11.16 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2037.11.16 | 2037.11.16 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36% | 2.36%
Notional amount | ₩ 54,527 | ₩ 58,968 |  |  | kr 450,000 |  |  |  |  |  | kr 450,000 |  |  |
FY-18 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2018.03.13 | 2018.03.13 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028.03.13 | 2028.03.13 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35% | 3.35%
Notional amount | ₩ 268,208 | ₩ 250,850 |  |  |  | $ 1,650,000 |  |  |  |  |  | $ 1,650,000 |  |
FY-18 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2018.06.07~2018.07.25 | 2018.06.07~2018.07.25 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 1,774,220 | ₩ 1,659,700 | $ 1,400,000 |  |  |  |  |  | $ 1,400,000 |  |  |  |  |
FY-18 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023.06.07 | 2023.06.07 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75% | 3.75%
FY-18 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2023.07.25 | 2023.07.25 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88% | 3.88%
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2019.02.27 | 2019.01.22~2019.06.24 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024.02.27 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 0.13% |  | 0.13% | 0.13% | 0.13% | 0.13% | 0.13% | 0.13% |  |  |  |  |  |
Notional amount | ₩ 274,574 | ₩ 948,400 |  |  |  |  | SFr 200,000 |  | $ 800,000 |  |  |  |  |
FY-19 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2022.01.22 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 2.50% |  |  |  |  |  |  | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50%
FY-19 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2024.06.24 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.38% |  |  |  |  |  |  | 3.38% | 3.38% | 3.38% | 3.38% | 3.38% | 3.38%
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2019.06.24 | 2019.02.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024.06.24 | 2024.02.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.50% | 0.13% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% | 0.13% | 0.13% | 0.13% | 0.13% | 0.13% | 0.13%
Notional amount | ₩ 633,650 | ₩ 259,494 | $ 500,000 |  |  |  |  |  |  |  |  |  | SFr 200,000 |
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2019.07.19 | 2019.07.19 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 411,861 | ₩ 389,241 |  |  |  |  | SFr 300,000 |  |  |  |  |  | SFr 300,000 |
FY-19 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024.07.19 | 2024.07.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00%
FY-19 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.07.19 | 2027.07.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05% | 0.05%
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2019.10.30 | 2019.07.22 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024.10.30 | 2022.07.22 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 2.38% |  |  |  |  |  |  | 2.38% | 2.38% | 2.38% | 2.38% | 2.38% | 2.38%
Interest rate (%) | 3M BBSW+0.97 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.97% |  | 0.97% | 0.97% | 0.97% | 0.97% | 0.97% | 0.97% |  |  |  |  |  |
Notional amount | ₩ 257,523 | ₩ 355,650 |  |  |  |  |  | $ 300,000 | $ 300,000 |  |  |  |  |
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2019.12.19 | 2019.10.30 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2037.12.31 | 2024.10.30 |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (%) |  | 3M BBSW+0.97 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 0.97% |  |  |  |  |  |  | 0.97% | 0.97% | 0.97% | 0.97% | 0.97% | 0.97%
Notional amount | ₩ 457,368 | ₩ 257,667 | $ 360,899 |  |  |  |  |  |  |  |  |  |  | $ 300,000
FY-19 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.30% |  | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% |  |  |  |  |  |
FY-19 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.70% |  | 5.70% | 5.70% | 5.70% | 5.70% | 5.70% | 5.70% |  |  |  |  |  |
FY-19 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date |  | 2019.12.19 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2037.12.31 |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  | ₩ 440,943 |  |  |  |  |  |  | $ 371,947 |  |  |  |  |
FY-19 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.30% |  |  |  |  |  |  | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% | 3.30%
FY-19 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 5.70% |  |  |  |  |  |  | 5.70% | 5.70% | 5.70% | 5.70% | 5.70% | 5.70%
FY-20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2020.02.03 | 2020.02.03 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.02.03 | 2025.02.03 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13% | 2.13%
Notional amount | ₩ 380,190 | ₩ 355,650 | $ 300,000 |  |  |  |  |  | $ 300,000 |  |  |  |  |
FY-20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2020.05.06 | 2020.05.06 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.05.06 | 2025.05.06 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% | 1.75%
Notional amount | ₩ 633,650 | ₩ 592,750 | $ 500,000 |  |  |  |  |  | $ 500,000 |  |  |  |  |
FY-20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2020.06.15 | 2020.06.15 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.06.15 | 2025.06.15 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13%
Notional amount | ₩ 633,650 | ₩ 592,750 | $ 500,000 |  |  |  |  |  | $ 500,000 |  |  |  |  |
FY-20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2020.08.03 | 2020.08.03 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.02.03 | 2026.02.03 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.00% | 0.61% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 0.61% | 0.61% | 0.61% | 0.61% | 0.61% | 0.61%
Notional amount | ₩ 380,190 | ₩ 355,650 | $ 300,000 |  |  |  |  |  | $ 300,000 |  |  |  |  |
FY-21 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2021.01.27 | 2021.01.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.01.27 | 2026.01.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75% | 0.75%
Notional amount | ₩ 570,285 | ₩ 533,475 | $ 450,000 |  |  |  |  |  | $ 450,000 |  |  |  |  |
FY-21 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2021.04.27 | 2021.04.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.04.27 | 2026.04.27 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25%
Notional amount | ₩ 633,650 | ₩ 592,750 | $ 500,000 |  |  |  |  |  | $ 500,000 |  |  |  |  |
FY-21 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2021.08.09 | 2021.08.09 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.08.09 | 2026.08.09 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25%
Notional amount | ₩ 380,190 | ₩ 355,650 | $ 300,000 |  |  |  |  |  | $ 300,000 |  |  |  |  |
FY-21 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2021.09.24 | 2021.09.24 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.09.24 | 2026.09.24 |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13% | 1.13%
Notional amount | ₩ 380,190 | ₩ 355,650 | $ 300,000 |  |  |  |  |  | $ 300,000 |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.04.21 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.04.21 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.63% |  | 3.63% | 3.63% | 3.63% | 3.63% | 3.63% | 3.63% |  |  |  |  |  |
Notional amount | ₩ 380,190 |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.05.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.05.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.60% |  | 3.60% | 3.60% | 3.60% | 3.60% | 3.60% | 3.60% |  |  |  |  |  |
Notional amount | ₩ 633,650 |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.06.14 |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 1,013,840 |  | $ 800,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.06.14 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.63% |  | 3.63% | 3.63% | 3.63% | 3.63% | 3.63% | 3.63% |  |  |  |  |  |
FY-22 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.06.14 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.00% |  | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.06.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025.06.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.13% |  | 4.13% | 4.13% | 4.13% | 4.13% | 4.13% | 4.13% |  |  |  |  |  |
Notional amount | ₩ 380,190 |  | $ 300,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.07.27 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027.07.27 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.25% |  | 4.25% | 4.25% | 4.25% | 4.25% | 4.25% | 4.25% |  |  |  |  |  |
Notional amount | ₩ 887,110 |  | $ 700,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.10.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | ₩ 1,013,840 |  | $ 800,000 |  |  |  |  |  |  |  |  |  |  |
FY-22 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026.04.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.38% |  | 5.38% | 5.38% | 5.38% | 5.38% | 5.38% | 5.38% |  |  |  |  |  |
FY-22 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028.04.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.50% |  | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% | 5.50% |  |  |  |  |  |
FY-22 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Issuance Date | 2022.10.06~2022.11.01 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2032.10.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.16% |  | 5.16% | 5.16% | 5.16% | 5.16% | 5.16% | 5.16% |  |  |  |  |  |
Notional amount | ₩ 381,992 |  |  |  |  | $ 2,350,000 |  |  |  |  |  |  |  |

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