XML 128 R114.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsidiaries - Business Combinations (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015
Youth Co., Ltd. (Youth) [Member] |
Disclosure of detailed information about business combination [Line Items] |
Percentage held by noncontrolling interest | 30.00%

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

X
- Definition The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph 12 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_12_c&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=cht_YouthCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |