XML 92 R78.htm IDEA: XBRL DOCUMENT
v3.21.1

Basis Of Preparation And Accounting Policies - Summary Of Policies Applied To The Group's Intangible Assets - (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2020
Trademarks [member] |
Disclosure of detailed information about intangible assets [line items] |
Description of useful life, intangible assets other than goodwill | Indefinite
Amortisation method, intangible assets other than goodwill | No amortization
Description Of Intangible Asset Recognition | Acquired
Technology know how [member] |
Disclosure of detailed information about intangible assets [line items] |
Useful life measured as period of time, intangible assets other than goodwill | 10 years
Amortisation method, intangible assets other than goodwill | Amortized on a straight-line basis over the period of the technology know-how
Description Of Intangible Asset Recognition | Internally generated
Development costs |
Disclosure of detailed information about intangible assets [line items] |
Description Of Intangible Asset Recognition | Internally generated

X
- Definition Description of intangible asset recognition. + References No definition available. + Details
Name: | cyd_DescriptionOfIntangibleAssetRecognition
Namespace Prefix: | cyd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amortisation method used for intangible assets other than goodwill with finite useful lives. [Refer: Intangible assets other than goodwill; Depreciation and amortisation expense] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_b&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_AmortisationMethodIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of useful life used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DescriptionOfUsefulLifeIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=cyd_TrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=cyd_TechnologyKnowHowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_IntangibleAssetsUnderDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |