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The amount of financial assets that are measured at fair value through other comprehensive income. A financial asset shall be measured at fair value through other comprehensive income if both of the following conditions are met: (a) the financial asset is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets and (b) the contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. [Refer: At fair value [member]; Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 8
-Subparagraph h
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_8_h&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
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Period Type:	instant

The gains (losses) recognised in other comprehensive income on the fair value measurement of assets. [Refer: At fair value [member]; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2018-01-01
-Paragraph 93
-Subparagraph e
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2018-03-01&anchor=para_93_e_ii&doctype=Standard
-URIDate 2018-03-16

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Additions Fair Value Measurement Assets

No definition available.

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The increase (decrease) in financial assets at fair value through other comprehensive income resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity.

No definition available.

Name:	tsm_IncreaseDecreaseThroughNetExchangeDifferencesFinancialAssetsAtFairValueThroughOtherComprehensiveIncome
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Data Type:	xbrli:monetaryItemType
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Proceeds from financial assets at fair value through other comprehensive income measured at level 3.

No definition available.