The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

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The amount of debt instruments held by the entity that were issued by a corporate entity. [Refer: Debt instruments held]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The amount of current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of instruments representing indebtedness held by the entity.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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The amount of non-current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost]

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Financial Assets at Amortized Cost - Schedule of Financial Assets at Amortized Cost (Detail) $ in Millions, $ in Millions	Dec. 31, 2022 TWD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 TWD ($)	Dec. 31, 2020 TWD ($)	Dec. 31, 2019 TWD ($)
Disclosure of financial assets [line items]
Corporate bonds	$ 129,727.4		$ 5,307.0
Less: Allowance for impairment loss	(331.6)		(347.0)	$ (246.6)	$ (325.3)
Current portion	94,600.2	$ 3,078.4	3,773.6
Noncurrent portion	35,127.2	$ 1,143.1	1,533.4
Corporate bonds [member]
Disclosure of financial assets [line items]
Corporate bonds	81,041.0		5,310.1
Less: Allowance for impairment loss	(56.4)		(3.1)
Commercial paper [member]
Disclosure of financial assets [line items]
Commercial paper	$ 48,742.8		$ 0.0