XML 137 R123.htm IDEA: XBRL DOCUMENT v3.19.1

Goodwill - Additional Information (Detail) - CNY (¥)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2017
Disclosure of information for cash-generating units [line items]
Pre-tax discount rate applied to cash flow projection	26.30%
Impairment on goodwill		¥ 1,131,000
Long term rates used to extrapolate the budget	6.30%		6.50%
Percentage decrease in demand that would result in an impairment	1.00%		2.37%
Pre-tax discount rate that would result in an impairment	14.28%		14.82%
Long term growth rate that would result in an impairment	5.77%		2.98%
Guangxi Yuchai Machinery Company Lmited [member]
Disclosure of information for cash-generating units [line items]
Pre-tax discount rate applied to cash flow projection	13.96%		12.84%
Impairment on goodwill	¥ 0

X

- Definition

Percentage decrease in demand that would result in an impairment.

+ References

No definition available.

+ Details

Name:	cyd_PercentageDecreaseInDemandThatWouldResultInAnImpairment
Namespace Prefix:	cyd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage decrease in growth rate that would result in an impairment.

+ References

No definition available.

+ Details

Name:	cyd_PercentageDecreaseInGrowthRateThatWouldResultInAnImpairment
Namespace Prefix:	cyd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage increase in pre-tax discount rate to extrapolate cash flow projections.

+ References

No definition available.

+ Details

Name:	cyd_PercentageIncreaseInPretaxDiscountRateThatWouldResultInAnImpairment
Namespace Prefix:	cyd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2018-01-01
-Paragraph 134
-Subparagraph d
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_d_v&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2018-01-01
-Paragraph 134
-Subparagraph e
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_e_v&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2018-01-01
-Paragraph 134
-Subparagraph d
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_d_iv&doctype=Standard
-URIDate 2018-03-16

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2018-01-01
-Paragraph 134
-Subparagraph e
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2018-03-01&anchor=para_134_e_iv&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
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_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B67
-Subparagraph d
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_v&doctype=Appendix&seq=2
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=cyd_GuangxiYuchaiMachineryCompanyLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: