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Related Party Disclosures - Significant Transactions with Related Parties (Parenthetical) (Detail) - CNY (¥) ¥ in Millions	1 Months Ended
	Aug. 31, 2017	Jun. 30, 2017
Guangxi Yuchai Accessories Manufacturing Company Limited [member]
Disclosure of transactions between related parties [line items]
Percentage of equity interest acquired		25.00%
Purchase consideration		¥ 1.3
YEMC [member]
Disclosure of transactions between related parties [line items]
Proportion of equity interest	30.00%
Total consideration from disposal	¥ 1.9

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Consideration from disposal

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- Definition

The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2018-01-01
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- 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.

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- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]]

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