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Income Tax - Major Components of Income Tax Expense (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 TWD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($)
Current tax |  |  |  |
Current tax expenses recognized for the year | $ 8,875 |  | $ 8,863 | $ 8,490
Income tax on unappropriated earnings | (31) |  | 137 | 181
Income tax adjustments on prior years | (128) |  | (141) | (150)
Others | 4 |  | 7 | 7
Current tax | 8,720 |  | 8,866 | 8,528
Deferred tax |  |  |  |
Deferred tax expense recognized for the year | 218 |  | 318 | 489
Income tax adjustments on prior years | 9 |  | 151 | 3
Deferred tax | 227 |  | 469 | 492
Income tax recognized in profit or loss | $ 8,947 | $ 292 | $ 9,335 | $ 9,020

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