XML 121 R106.htm IDEA: XBRL DOCUMENT
v3.19.1

Trade Notes and Accounts Receivable, Net - Aging Analysis for Trade Notes and Accounts Receivable (Detail) $ in Millions, $ in Millions | Dec. 31, 2018 TWD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 TWD ($)
--- | --- | --- | ---
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable | $ 30,076 | $ 983 | $ 31,941
Gross carrying amount [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable | $ 32,678 |  | 34,058
Gross carrying amount [Member] | Non-overdue [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 30,032
Gross carrying amount [Member] | Less than 30 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 1,280
Gross carrying amount [Member] | 31-60 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 485
Gross carrying amount [Member] | 61-90 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 278
Gross carrying amount [Member] | 91-120 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 253
Gross carrying amount [Member] | 121-180 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | 122
Gross carrying amount [Member] | More than 181 days [Member] |  |  |
Disclosure of financial assets that are either past due or impaired [Line Items] |  |  |
Trade notes and accounts receivable |  |  | $ 1,608

X
- Definition The amount of current trade receivables. [Refer: Trade receivables] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 68 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_68&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_CurrentTradeReceivables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_CurrentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_NotLaterThanOneMonthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=cht_LaterThanFourMonthsAndNotLaterThanSixMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PastDueStatusAxis=ifrs-full_LaterThanSixMonthsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |