Leases - Summary of Prepaid Lease Assets and Operating Lease Assets (Details) - KRW (₩) ₩ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of assets subject to operating lease [Line Items] | ||
| Prepaid lease assets and operating lease assets | ₩ 3,823,620 | ₩ 3,965,840 |
| Gross Carrying Amount | Prepaid lease assets | ||
| Disclosure of assets subject to operating lease [Line Items] | ||
| Prepaid lease assets and operating lease assets | 18,844 | 42,996 |
| Acquisition cost | Operating lease assets | ||
| Disclosure of assets subject to operating lease [Line Items] | ||
| Prepaid lease assets and operating lease assets | 5,263,765 | 5,132,477 |
| Accumulated depreciation | Operating lease assets | ||
| Disclosure of assets subject to operating lease [Line Items] | ||
| Prepaid lease assets and operating lease assets | (1,458,989) | (1,209,633) |
| Carrying Amount | Operating lease assets | ||
| Disclosure of assets subject to operating lease [Line Items] | ||
| Prepaid lease assets and operating lease assets | ₩ 3,804,776 | ₩ 3,922,844 |