XML 111 R98.htm IDEA: XBRL DOCUMENT v3.19.1

Financial Assets at Fair Value Through Other Comprehensive Income-2018 - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 TWD ($)
Financial assets at fair value through other comprehensive income [abstract]
Proceeds from sale of shares	$ 840.6
Unrealized gain (loss) on investments in equity instruments at fair value through other comprehensive income	1,193.1
Cumulative loss allowance for expected credit loss	$ 29.7

X

- References

No definition available.

+ Details

Name:	ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from issuing shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 17
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_a&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_ProceedsFromIssuingShares
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Cumulative loss allowance for expected credit loss at fair value through other comprehensive income.

+ References

No definition available.

+ Details

Name:	tsm_CumulativeLossAllowanceForExpectedCreditLossAtFairValueThroughOtherComprehensiveIncome
Namespace Prefix:	tsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Unrealized gains/losses on equity securities at fair value through other comprehensive income

+ References

No definition available.

+ Details

Name:	tsm_UnrealizedGainsLossesOnEquitySecuritiesAtFairValueThroughOtherComprehensiveIncome
Namespace Prefix:	tsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration