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U.S. Dollar Amounts - Additional Information (Detail)	Dec. 31, 2018
Disclosure of basis of preparation of financial statements [abstract]
Reporting currency for translation, exchange rate	30.61

X

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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X

- Definition

Disclosure of basis of preparation of financial statements.

+ References

No definition available.

+ Details

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Namespace Prefix:	tsm_
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