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Inventories - Summary of Inventories (Detail) $ in Millions, $ in Millions	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)
Classes of current inventories [abstract]
Merchandise	$ 4,874		$ 4,340
Project in process	4,564		4,771
Work in process	269		74
Raw materials	222		221
Inventories subtotal	9,929		9,406
Land held under development	1,999		1,999
Construction in progress	159		116
Inventories	$ 12,087	$ 369	$ 11,521

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Current project in progress.

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Land held under development.

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The amount of expenditure capitalised during the construction of non-current assets that are not yet available for use. [Refer: Non-current assets]

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A classification of current inventory representing the amount of materials and supplies to be consumed in a production process or while rendering services. [Refer: Inventories]

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The amount of current inventories. [Refer: Inventories]

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A classification of current inventory representing the amount of assets currently in production, which require further processes to be converted into finished goods or services. [Refer: Current finished goods; Inventories]

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