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Inventories - Summary of Inventories (Detail) - TWD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Disclosure of inventories [Line Items]
Raw materials	$ 2,694,594	$ 2,568,648
Gross carrying amount [member]
Disclosure of inventories [Line Items]
Raw materials	2,854,743	2,754,911
Allowance for impairment losses [member]
Disclosure of inventories [Line Items]
Raw materials	$ (160,149)	$ (186,263)

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- Definition

A classification of current inventory representing the amount of assets to be consumed in the production process or in the rendering of services. [Refer: Inventories]

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- Definition

Disclosure of inventories.

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