XML 134 R120.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Property, Plant and Equipment - Estimated Service Lives of Property, Plant and Equipment - Assets Subject to Operating Leases (Detail) - Property, plant and equipment subject to operating leases [member] | 12 Months Ended
--- | ---
Dec. 31, 2023
Main buildings [Member] | Bottom of Range [Member] |
Disclosure Of Property Plant And Equipment [Line Items] |
Estimated useful lives | 35 years
Main buildings [Member] | Top of Range [Member] |
Disclosure Of Property Plant And Equipment [Line Items] |
Estimated useful lives | 60 years
Other building facilities [Member] | Bottom of Range [Member] |
Disclosure Of Property Plant And Equipment [Line Items] |
Estimated useful lives | 3 years
Other building facilities [Member] | Top of Range [Member] |
Disclosure Of Property Plant And Equipment [Line Items] |
Estimated useful lives | 15 years

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_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cht_MainBuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_PropertyPlantAndEquipmentSubjectToOperatingLeasesMember
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: |

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

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=cht_OtherBuildingFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |