Derivatives - Disclosure of gain (loss) on fair value hedge ineffectiveness in profit or loss and other comprehensive income (Details) - Hedges of net investment in foreign operations - Exchange risk - Foreign currency denominated debentures (KRWUSD) - KRW (₩) ₩ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Other comprehensive income | ||
| Disclosure of gain (loss) on fair value hedge ineffectiveness in profit or loss and other comprehensive income [Line Items] | ||
| Profit or loss recognized in OCI | ₩ 30,325 | ₩ (156,015) |
| Hedge ineffectiveness recognized in profit or loss | (8,006) | 41,188 |
| Line item which recognized the hedge ineffectiveness | 22,319 | (114,827) |
| Profit or loss [Member] | ||
| Disclosure of gain (loss) on fair value hedge ineffectiveness in profit or loss and other comprehensive income [Line Items] | ||
| Hedge ineffectiveness recognized in profit or loss | 0 | 0 |
| Line item which recognized the hedge ineffectiveness | ₩ 0 | ₩ 0 |