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Investments in Subsidiaries - Details of Significant Subsidiaries of the Group (Parenthetical) (Detail) - Yuchai [Member] - Jining Yuchai Engine Company Limited [Member] | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2014
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Disclosure of subsidiaries [Line Items] |  |  |
Percentage of equity interest disposed |  |  | 70.00%
Percentage of control | 100.00% | 100.00% |

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- Definition Percentage of equity disposed. + References No definition available. + Details
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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. + References No definition available. + Details
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- Definition The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2016-01-13 -Paragraph B64 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2016-03-30&anchor=para_B64_c&doctype=Appendix&seq=2 -URIDate 2016-03-31 + Details
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- Details
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- Details
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