Contents of Significant Accounts - Summary of Disaggregation of Revenue by The Timing of Revenue Recognition (Detail) - TWD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of disaggregation of revenue from contracts with customers [line items] | |||
| Revenue from contracts with customers | $ 237,553,199 | $ 232,302,584 | $ 222,533,000 |
| Goods or services transferred at point in time [member] | |||
| Disclosure of disaggregation of revenue from contracts with customers [line items] | |||
| Revenue from contracts with customers | 234,505,273 | 229,505,369 | 220,283,306 |
| Goods or services transferred over time [member] | |||
| Disclosure of disaggregation of revenue from contracts with customers [line items] | |||
| Revenue from contracts with customers | $ 3,047,926 | $ 2,797,215 | $ 2,249,694 |