XML 133 R124.htm IDEA: XBRL DOCUMENT v3.21.2

Financial Instruments - Additional Information (Detail) - TWD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Percentage of accounts receivable from ten largest customers	78.00%		79.00%
Expected credit loss decrease increase	$ 3.6	$ 0.5
Level 3 [member]
Disclosure of detailed information about financial instruments [line items]
Discount for lack of marketability percentage	10.00%		10.00%
Decrease in fair value due to lack of marketability increase by 1%	$ (46.2)		$ (39.0)
Percentage increase in the discount for lack of marketability	1.00%		1.00%
Equity Price Risk [member]
Disclosure of detailed information about financial instruments [line items]
Assumed change in risk	(10.00%)	(10.00%)
Assumed change in risk, monetary effect	$ (532.9)	$ (419.3)
Currency Risk [member]
Disclosure of detailed information about financial instruments [line items]
Assumed change in risk	(10.00%)	(10.00%)
Assumed change in risk, monetary effect	$ (1,066.8)	$ (519.6)
Interest rate risk [member] | Fixed Income Securities [member]
Disclosure of detailed information about financial instruments [line items]
Assumed change in risk	(1.00%)	(1.00%)
Assumed change in risk, monetary effect	$ (3,713.1)	$ (3,153.0)

X

- 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

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

X

- Definition

The increase (decrease) in the fair value measurement of assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2020-01-01
-Paragraph 93
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2020-en-r&anchor=para_93_e&doctype=Standard
-URIDate 2020-01-01

+ Details

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

X

- Definition

The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph B8
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_B8_c&doctype=Appendix&subtype=B
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_RiskExposureAssociatedWithInstrumentsSharingCharacteristic
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Discount for lack of marketability percentage.

+ References

No definition available.

+ Details

Name:	tsm_DiscountForLackOfMarketabilityPercentage
Namespace Prefix:	tsm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Increase decrease expected credit loss

+ References

No definition available.

+ Details

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

X

- Definition

Percentage increase in the discount for lack of marketability.

+ References

No definition available.

+ Details

Name:	tsm_PercentageIncreaseInTheDiscountForLackOfMarketability
Namespace Prefix:	tsm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of accounts receivable from the top ten customers.

+ References

No definition available.

+ Details

Name:	tsm_PercentageOfAccountsReceivableFromTopTenCustomers
Namespace Prefix:	tsm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Risk exposure associated with instruments sharing characteristic, percentage change in risk

+ References

No definition available.

+ Details

Name:	tsm_RiskExposureAssociatedWithInstrumentsSharingCharacteristicPercentageChangeInRisk
Namespace Prefix:	tsm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_EquityPriceRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=tsm_FixedIncomeSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: