XML 188 R7.htm IDEA: XBRL DOCUMENT
v3.20.1

Approval of Financial Statements | 12 Months Ended
--- | ---
Dec. 31, 2019
Disclosure Of Approval Of Financial Statement [Abstract] |
Approval of Financial Statements |
2. | APPROVAL OF FINANCIAL STATEMENTS
The consolidated financial statements were authorized for issue by the management on March 31, 2020.

X
- Definition Disclosure of approval of financial statement. + References No definition available. + Details
Name: | cht_DisclosureOfApprovalOfFinancialStatementAbstract
Namespace Prefix: | cht_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the authorisation of financial statements for issue. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DisclosureOfAuthorisationOfFinancialStatementsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration