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Investments accounted for using equity method - Details of Investment in Associates (Detail) - TWD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of associates [line items]
Carrying amount	$ 3,900,449	$ 3,271,677
JMC ELECTRONICS CO., LTD. [member]
Disclosure of associates [line items]
Carrying amount	304,437	250,769
Unimos Shanghai [member]
Disclosure of associates [line items]
Carrying amount	$ 3,596,012	$ 3,020,908

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- Definition

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.

+ References

No definition available.

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- Definition

The amount of investments in associates accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2021-01-01
-Paragraph 55
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-URIDate 2021-03-24

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