Prepaid Expenses - Summary of Incremental Costs of Obtaining Contracts That Capitalized as Assets and Related Amortization Recognized as impairment losses (Detail) - KRW (₩) ₩ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [abstract] | |||
| Amortization and impairment losses recognized | ₩ 2,596,632 | ₩ 2,493,346 | ₩ 2,505,724 |