Contents of Significant Accounts - Bonds Payable (Detail) $ in Thousands, $ in Thousands |
Dec. 31, 2025
TWD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
TWD ($)
|
|---|---|---|---|
| Disclosure of detailed information about bonds [Line Items] | |||
| Bonds payable | $ 50,228,305 | $ 30,051,568 | |
| Less: Current or exchangeable portion due within one year | (16,157,161) | (5,466,589) | |
| Net | 34,071,144 | $ 1,086,106 | 24,584,979 |
| Less: Discounts on bonds payable [member] | |||
| Disclosure of detailed information about bonds [Line Items] | |||
| Bonds payable | (129,068) | (305,805) | |
| Unsecured domestic bonds payable [member] | Cost [member] | |||
| Disclosure of detailed information about bonds [Line Items] | |||
| Bonds payable | 44,600,000 | 24,600,000 | |
| Unsecured exchangeable bonds payable [member] | Cost [member] | |||
| Disclosure of detailed information about bonds [Line Items] | |||
| Bonds payable | $ 5,757,373 | $ 5,757,373 |