XML 105 R91.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Financial Instruments at Fair Value Through Profit or Loss - Summary of Financial Instruments at Fair Value through Profit or Loss (Detail) - TWD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financial assets-current |  |
Financial assets-current, Mandatorily measured at FVTPL | $ 1 | $ 4
Financial assets-noncurrent |  |
Non-derivatives | 1,036 | 1,020
Forward exchange contracts [Member] |  |
Financial assets-current |  |
Derivatives (not designated for hedge) | 1 | 3
Listed stocks domestic [Member] |  |
Financial assets-current |  |
Non-derivatives | 0 | 1
Non listed stocks domestic [Member] |  |
Financial assets-noncurrent |  |
Non-derivatives | 704 | 758
Non listed stocks foreign [Member] |  |
Financial assets-noncurrent |  |
Non-derivatives | 89 | 103
Limited partnership - domestic [Member] |  |
Financial assets-noncurrent |  |
Non-derivatives | 219 | 135
Film and drama investing agreements [Member] |  |
Financial assets-noncurrent |  |
Non-derivatives | $ 24 | $ 24

X
- Definition Current nonderivative financial assets. + References No definition available. + Details
Name: | cht_CurrentNonderivativeFinancialAssets
Namespace Prefix: | cht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Noncurrent nonderivative financial assets. + References No definition available. + Details
Name: | cht_NoncurrentNonderivativeFinancialAssets
Namespace Prefix: | cht_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_CategoriesOfCurrentFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_CategoriesOfNoncurrentFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of current derivative financial assets. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentDerivativeFinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of current financial assets mandatorily measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Financial assets at fair value through profit or loss, mandatorily measured at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_a&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentFinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_ForwardContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cht_ListedStocksDomesticMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cht_NonListedStocksDomesticMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cht_NonListedStocksForeignMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cht_LimitedPartnershipDomesticMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=cht_FilmAndDramaInvestingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |