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Other Assets - Summary of Other Assets (Detail) $ in Millions, $ in Millions	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 TWD ($)
Miscellaneous assets [abstract]
Refundable deposits	$ 2,162		$ 1,995
Spare parts	2,006		2,233
Other financial assets	1,000		1,000
Others	1,724		1,634
Other assets	8,001		7,451
Others	1,109		589
Other current assets	3,115	$ 94	2,822
Others	2,833		2,223
Other noncurrent assets	$ 4,886	$ 150	$ 4,629

X

- Definition

The amount of long-term deposits held by the entity.

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The amount of assets that the entity does not separately disclose in the same statement or note.

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The amount of current assets that the entity does not separately disclose in the same statement or note. [Refer: Current assets]

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The amount of current non-financial assets that the entity does not separately disclose in the same statement or note. [Refer: Financial assets]

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The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets]

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The amount of non-current financial assets that the entity does not separately disclose in the same statement or note. [Refer: Other financial assets]

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The amount of non-current non-financial assets that the entity does not separately disclose in the same statement or note. [Refer: Financial assets]

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A classification of current inventory representing the amount of interchangeable parts that are kept in an inventory and are used for the repair or replacement of failed parts. [Refer: Inventories]

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