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Derivatives - Summary of Derivative Interest Rate Swap Contract List (Details) - 12 months ended Dec. 31, 2021 $ in Thousands, ₩ in Millions | KRW (₩) | USD ($)
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Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Export-Import Bank of Korea |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | $ 15,893
Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | ING Bank |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 7,861
Designated as Hedging Instrument | Interest rate swap 3 contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | BNP Paribas |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 7,861
Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | BNP Paribas |
Derivative, Term of Contract |  | 2009~2027 |
Contract Interest rate Pay |  | 4.16 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 60,316
Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | KFW |
Derivative, Term of Contract |  | 2009~2027 |
Contract Interest rate Pay |  | 4.16 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 60,316
Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Export-Import Bank of Korea |
Derivative, Term of Contract |  | 2016~2036 |
Contract Interest rate Pay |  | 3.00 |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | $ 71,116
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 2.01 |
Contract Interest rate Receive |  | 3M CD + 0.24% |
Contract amount |  | ₩ 100,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 2.06 |
Contract Interest rate Receive |  | 3M CD + 0.27% |
Contract amount |  | ₩ 100,000 |
Not Designated as Hedging Instrument | Interest rate swap 3 contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty | [1] | Nomura |
Derivative, Term of Contract | [1] | 2018~2038 |
Contract Interest rate Pay | [1] | 2.56 |
Contract Interest rate Receive | [1] | 3.75 |
Contract amount | [1] | ₩ 30,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.15 |
Contract Interest rate Receive |  | 3M CD + 0.19% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.17 |
Contract Interest rate Receive |  | 3M CD + 0.19% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.03 |
Contract Interest rate Receive |  | 3M CD + 0.21% |
Contract amount |  | ₩ 150,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2019~2024 |
Contract Interest rate Pay |  | 1.87 |
Contract Interest rate Receive |  | 3M CD + 0.13% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Shinhan Bank |
Derivative, Term of Contract |  | 2021~2025 |
Contract Interest rate Pay |  | 2.32 |
Contract Interest rate Receive |  | 3M CD + 0.43% |
Contract amount |  | ₩ 100,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Societe Generale |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 3M Libor + 3.44% |
Contract Interest rate Receive |  | 3.77 |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Nomura |
Derivative, Term of Contract |  | 2017~2032 |
Contract Interest rate Pay |  | 3M Libor + 2.22% |
Contract Interest rate Receive |  | 2.60 |
Contract amount |  | ₩ 52,457 |
Not Designated as Hedging Instrument | Interest rate swap contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Nomura |
Derivative, Term of Contract |  | 2017~2032 |
Contract Interest rate Pay |  | 3M Libor + 2.24% |
Contract Interest rate Receive |  | 2.62 |
Contract amount |  | ₩ 59,423 |
Not Designated as Hedging Instrument | Interest rate swap 12 contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty | [2] | Nomura |
Derivative, Term of Contract | [2] | 2021~2041 |
Contract Interest rate Pay | [2] | 1.84 |
Contract Interest rate Receive | [2] | 2.60 |
Contract amount | [2] | ₩ 30,000 |
Not Designated as Hedging Instrument | Interest rate swap 13 contracts |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty | [3] | Nomura |
Derivative, Term of Contract | [3] | 2021~2041 |
Contract Interest rate Pay | [3] | 1.87 |
Contract Interest rate Receive | [3] | 2.38 |
Contract amount | [3] | ₩ 50,000 |
[1] | 2.56% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CD + 0.10% is applied thereafter. Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023.
[2] | 1.84% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT + 0.35% is applied thereafter.
[3] | 1.87% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CMT + 0.35% is applied thereafter.

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