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Revenue from Contracts with Customers - Summary of Contract Balances (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2021
Statement [Line Items] |
Contract performance obligations description | According to the business customary practice, the remaining performance obligations (unfulfilled service-type maintenance service) at the year-end is expected to be satisfied within 2 years.
Bottom of range [member] |
Statement [Line Items] |
Trade Receivables Payment Terms | 60 days
Top of range [member] |
Statement [Line Items] |
Trade Receivables Payment Terms | 90 days

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | cyd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Trade receivables payment terms. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition The description of when the entity typically satisfies its performance obligations. [Refer: Performance obligations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 119 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_119_a&doctype=Standard -URIDate 2021-03-24 + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |