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Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings per share [abstract]
Number of employee outstanding share option, anti-dilutive	270,000	270,000

X

- Definition

Anti Dilutive Effect Of Employee Outstanding Share Options.

+ References

No definition available.

+ Details

Name:	ck0000932695_AntiDilutiveEffectOfEmployeeOutstandingShareOptions
Namespace Prefix:	ck0000932695_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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