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Net Income - Other Income and Expenses (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 TWD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($)
Analysis of income and expense [abstract] |  |  |  |
Gain (loss) on disposal of property, plant and equipment | $ 0 | $ 0 | $ (5) | $ (3)
Impairment loss on right-of-use assets | 0 |  | 0 | (420)
Impairment loss on property, plant and equipment | (299) | (10) | 0 | 0
Gain on disposal of investment properties, net | 0 | 0 | 1 | 0
Reversal of impairment loss (impairment loss) on investment properties | (336) | (10) | 107 | 83
Impairment loss | 0 | 0 | (9) | (29)
Other income and expenses | $ (635) | $ (20) | $ 93 | $ (369)

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- Definition The gains (losses) on disposals of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 98 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_98_c&doctype=Standard -URIDate 2023-03-23 + Details
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