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Cash Flow Information - Non-cash Investing Activities (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Noncash Investing Activities [Abstract] |  |  |  |
Additions of property, plant and equipment | $ 28,576 |  | $ 30,398 | $ 31,265
Changes in other payables | 180 |  | 343 | 270
Payments for acquisition of property, plant and equipment | 28,756 | $ 877 | 30,741 | 31,535
Proceeds from disposal of financial assets at fair value through other comprehensive income | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Noncash transactions changes in other payables. + References No definition available. + Details
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- Definition The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16_a&doctype=Standard -URIDate 2024-03-27 + Details
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