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Inventories - Summary of Inventories (Detail) $ in Millions, $ in Millions	Dec. 31, 2021 TWD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 TWD ($)
Classes of current inventories [abstract]
Finished goods	$ 32,562.8		$ 21,705.6
Work in process	137,700.4		91,672.9
Raw materials	11,111.1		14,716.0
Supplies and spare parts	11,728.0		9,258.9
Inventories, total	$ 193,102.3	$ 6,961.2	$ 137,353.4

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A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [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 to be consumed in the production process or in the rendering of services. [Refer: Inventories]

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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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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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