XML 145 R131.htm IDEA: XBRL DOCUMENT v3.25.1

Lease Arrangements - Summary of Range of Discount Rate for Lease Liabilities (Details) - Discount Rate [Member] - Lease Liabilities [Member]	Dec. 31, 2024	Dec. 31, 2023
Top of Range [Member] | Handsets Base Stations [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.02	0.0184
Top of Range [Member] | Others [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.09	0.09
Top of Range [Member] | Equipment [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.035	0.035
Bottom of Range [Member] | Handsets Base Stations [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.0037	0.0037
Bottom of Range [Member] | Others [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.0037	0.0037
Bottom of Range [Member] | Equipment [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Range of discount rate	0.0037	0.0037

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

The value of significant unobservable input used in the measurement of the fair value of assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2024-01-01
-Paragraph 93
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_d&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_SignificantUnobservableInputAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_UnobservableInputsAxis=ifrs-full_DiscountRateMeasurementInputMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_LeaseLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cht_HandsetsBaseStationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OfficeEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: