XML 184 R170.htm IDEA: XBRL DOCUMENT
v3.21.1

Financial Risk Management Objectives and Policies - Additional Information (Detail) ¥ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 CNY (¥) Customer | Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 CNY (¥) Customer | Dec. 31, 2020 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Basis points | 50.00% |  | 50.00% | 50.00%
Increase decrease in profit before tax on basis of higher lower basis points | ¥ 20.9 | $ 3.2 | ¥ 21.4 |
People's Republic of China [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Number of top customers | 20 | 20 | 20 |
People's Republic of China [member] | Top 20 Customers [member] |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Amount owed | ¥ 125.5 |  | ¥ 387.6 | $ 19.4
Percentage of trade receivables excluding bills receivables | 37.70% | 37.70% | 50.00% |

X
- Definition Increase decrease in profit loss before tax on basis of higher lower basis points. + References No definition available. + Details
Name: | cyd_IncreaseDecreaseInProfitLossBeforeTaxOnBasisOfHigherLowerBasisPoints
Namespace Prefix: | cyd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of top customers. + References No definition available. + Details
Name: | cyd_NumberOfTopCustomers
Namespace Prefix: | cyd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of trade receivables excluding bills receivables. + References No definition available. + Details
Name: | cyd_PercentageOfTradeReceivablesExcludingBillsReceivables
Namespace Prefix: | cyd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
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_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount due from customers for goods and services sold. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_b&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_TradeReceivables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MajorCustomersAxis=cyd_Top20CustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |