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v3.23.1

Notes and Accounts Receivable, Net - Summary of Notes and Accounts Receivable, Net (Detail) $ in Millions, $ in Millions | Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2019 TWD ($)
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Disclosure of information about of trade accounts and notes receivables [line items] |  |  |  |  |
Notes and accounts receivable | $ 229,755.9 | $ 7,476.6 | $ 197,586.1 |  |
Less: Loss allowance | (331.6) |  | (347.0) | $ (246.6) | $ (325.3)
Trade receivables [member] |  |  |  |  |
Disclosure of information about of trade accounts and notes receivables [line items] |  |  |  |  |
Notes and accounts receivable | 222,430.3 |  | 193,386.2 |  |
Trade receivables [member] | Amortized cost [member] |  |  |  |  |
Disclosure of information about of trade accounts and notes receivables [line items] |  |  |  |  |
Notes and accounts receivable | 222,761.9 |  | 193,733.2 |  |
Less: Loss allowance | (331.6) |  | (347.0) |  |
Trade receivables [member] | FVTOCI [member] |  |  |  |  |
Disclosure of information about of trade accounts and notes receivables [line items] |  |  |  |  |
Notes and accounts receivable | $ 7,325.6 |  | $ 4,199.9 |  |

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