Carrying amount of trade-out property plant and equipment.

No definition available.

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Namespace Prefix:	cht_
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Balance Type:	debit
Period Type:	instant

- Definition

Difference between assessed value and construction cost.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Lease contract for a period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Adjustments for gain (loss) on disposals of property, plant and equipment to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss); Property, plant and equipment; Disposals, property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 20
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_20&doctype=Standard
-URIDate 2022-03-24

+ Details

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- 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

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- Definition

The fair value of property, plant and equipment when the fair value is materially different from the carrying amount. [Refer: Carrying amount [member]; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 79
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_79_d&doctype=Standard
-URIDate 2022-03-24

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 73
-Subparagraph e
-Clause v
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_v&doctype=Standard
-URIDate 2022-03-24

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-URIDate 2022-03-24

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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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Property, Plant and Equipment - Additional Information (Detail) - TWD ($)	1 Months Ended	12 Months Ended
	May 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, plant and equipment subject to operating leases [member] \| Bottom of Range [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Lease period		1 year
Property, plant and equipment subject to operating leases [member] \| Top of Range [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Lease period		20 years
Assets Used by the Company [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Impairment loss on property, plant and equipment		$ 0	$ 0	$ 0
Gain (loss) on disposals, property, plant and equipment				1,268,000,000
Carrying amount of trade-out of land				37,000,000
Fair value of property, plant and equipment materially different from carrying amount				$ 1,305,000,000
MOTC [Member] \| Assets Used by the Company [Member]
Disclosure Of Property Plant And Equipment [Line Items]
Difference between assessed value and construction cost of land	$ 1,057,000,000