Dividends - Details of Dividend Declared (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Disclosure of dividends [Line Items] | ||||
| Dividend type | Cash dividends | Cash dividends | Cash dividends | |
| Number of shares outstanding | 212,982,275 | 212,886,342 | 212,699,730 | 218,032,053 |
| Face value (in won) | ₩ 100 | ₩ 100 | ||
| Dividends | ₩ 353,551 | ₩ 753,613 | ₩ 765,618 | |
| Interim Dividend One [Member] | ||||
| Disclosure of dividends [Line Items] | ||||
| Number of shares outstanding | 212,982,275 | 212,886,342 | 218,473,140 | |
| Face value (in won) | ₩ 100 | ₩ 100 | ₩ 100 | |
| Dividend ratio | 830.00% | 830.00% | 830.00% | |
| Dividends | ₩ 176,775 | ₩ 176,696 | ₩ 181,333 | |
| Interim Dividend Two [Member] | ||||
| Disclosure of dividends [Line Items] | ||||
| Number of shares outstanding | 212,886,342 | 216,412,898 | ||
| Face value (in won) | ₩ 100 | ₩ 100 | ||
| Dividend ratio | 830.00% | 830.00% | ||
| Dividends | ₩ 176,696 | ₩ 179,623 | ||
| Interim [Member] | ||||
| Disclosure of dividends [Line Items] | ||||
| Dividend type | Cash dividends (Interim) | Cash dividends (Interim) | Cash dividends (Interim) | |
| Number of shares outstanding | 212,982,275 | 212,880,865 | 218,466,141 | |
| Face value (in won) | ₩ 100 | ₩ 100 | ₩ 100 | |
| Dividend ratio | 830.00% | 830.00% | 830.00% | |
| Dividends | ₩ 176,776 | ₩ 176,690 | ₩ 181,327 | |
| Year-end [Member] | ||||
| Disclosure of dividends [Line Items] | ||||
| Number of shares outstanding | 212,886,342 | 212,699,730 | ||
| Face value (in won) | ₩ 100 | ₩ 100 | ||
| Dividend ratio | 1050.00% | 1050.00% | ||
| Dividends | ₩ 223,531 | ₩ 223,335 | ||