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Non-Cash Transactions - Non-cash Investing Activities (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 TWD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($)
Noncash Investing Activities [Abstract] |  |  |  |
Additions of property, plant and equipment | $ 30,398 |  | $ 31,265 | $ 35,613
Changes in other payables | 343 |  | 270 | (280)
Payments for acquisition of property, plant and equipment | 30,741 | $ 1,004 | 31,535 | 35,333
The carrying amounts of disposal of financial assets at fair value through other comprehensive income | 0 |  | 0 | 2,705
Changes in other current monetary assets | 0 |  | 0 | 271
Reclassified to investment accounted for using equity method | 0 |  | 0 | (64)
Proceeds from disposal of financial assets at fair value through other comprehensive income | $ 0 | $ 0 | $ 0 | $ 2,912

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