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Issued Capital - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024 shares
Ordinary shares [member] | Bottom of range [member]
Disclosure of classes of share capital [line items]
Number of special share shall cease to carry any rights in event by HLA	7,290,000

X

- Definition

Minimum number of ordinary shares to be owned by HLA and its affiliates, directly or indirectly, to prevent special share cease to carry any rights.

+ References

No definition available.

+ Details

Name:	ck0000932695_MinimumNumberOfOrdinarySharesToBeOwnedBySubsidiaryAndItsAffiliates
Namespace Prefix:	ck0000932695_
Data Type:	xbrli:sharesItemType
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 members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: