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Summary of Significant Accounting Policies - Detail Information of Subsidiaries (Parenthetical) (Detail) $ in Billions	Dec. 31, 2018 USD ($)
TSMC Nanjing Company Limited [member]
Disclosure of subsidiaries [line items]
Investment in subsidiaries	$ 3

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The amount of investments in subsidiaries in an entity's separate financial statements. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2018-01-01
-Paragraph 10
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_10&doctype=Standard
-URIDate 2018-03-16

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- Details

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