Bonds Payable - Summary of Bonds Payable (Detail) $ in Millions, $ in Millions |
Dec. 31, 2023
TWD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
TWD ($)
|
|---|---|---|---|
| Bonds payable [line items] | |||
| Less: Current portion | $ (6,997.7) | $ (18,100.0) | |
| Noncurrent bonds payable | 913,899.8 | $ 29,846.4 | 834,336.4 |
| Cost [member] | Taiwan [member] | |||
| Bonds payable [line items] | |||
| Unsecured bonds | 447,194.0 | 379,526.0 | |
| Cost [member] | Overseas [member] | |||
| Bonds payable [line items] | |||
| Unsecured bonds | 476,578.5 | 476,051.5 | |
| Discounts on bonds payable [member] | |||
| Bonds payable [line items] | |||
| Discounts on bonds payable | $ (2,875.0) | $ (3,141.1) |