Notes and Accounts Receivable, Net - Aging Analysis of Notes and Accounts Receivable, Net (Detail) $ in Millions, $ in Millions |
Dec. 31, 2023
TWD ($)
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Dec. 31, 2023
USD ($)
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Dec. 31, 2022
TWD ($)
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Dec. 31, 2021
TWD ($)
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Dec. 31, 2020
TWD ($)
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|---|---|---|---|---|---|
| Disclosure of financial assets [line items] | |||||
| Notes and accounts receivable, net | $ 201,313.9 | $ 6,574.6 | $ 229,755.9 | ||
| Less: Loss allowance | (531.5) | (331.6) | $ (347.0) | $ (246.6) | |
| Allowance for credit losses [member] | |||||
| Disclosure of financial assets [line items] | |||||
| Less: Loss allowance | (531.5) | (331.6) | |||
| Not past due [member] | |||||
| Disclosure of financial assets [line items] | |||||
| Notes and accounts receivable, net | 183,188.5 | 205,053.1 | |||
| Past due [member] | Past due within 30 days [member] | |||||
| Disclosure of financial assets [line items] | |||||
| Notes and accounts receivable, net | 18,641.1 | 24,516.3 | |||
| Past due [member] | Past due over 31 days [member] | |||||
| Disclosure of financial assets [line items] | |||||
| Notes and accounts receivable, net | $ 15.8 | $ 518.1 |