Investments in Subsidiaries - Additional Information (Detail)
¥ in Thousands, $ in Thousands |
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1 Months Ended |
12 Months Ended |
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Nov. 22, 2017
CNY (¥)
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Nov. 22, 2017
USD ($)
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Nov. 30, 2017
CNY (¥)
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Oct. 31, 2017
CNY (¥)
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Jun. 30, 2017
CNY (¥)
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Dec. 31, 2016
CNY (¥)
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Nov. 30, 2016 |
Sep. 30, 2016
CNY (¥)
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Oct. 31, 2015
CNY (¥)
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Jul. 31, 2015
CNY (¥)
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Dec. 31, 2017
CNY (¥)
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Dec. 31, 2017
USD ($)
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Dec. 31, 2016
CNY (¥)
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Dec. 31, 2015
CNY (¥)
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Dec. 31, 2017
USD ($)
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| Disclosure of subsidiaries [Line Items] |
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| Cash and cash equivalents subject to local exchange control regulations |
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¥ 3,270,182
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¥ 4,710,158
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¥ 3,270,182
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$ 744,171
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| Goodwill arising from acquisition written off |
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1,131
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| Additional investment in subsidiaries |
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¥ 8,279
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$ 1,308
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¥ 9,076
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¥ 22,499
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| Yuchai [Member] | Guangxi Yuchai Equipment Mould Company Limited [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Percentage of additional equity interests acquired |
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2.86%
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| Purchase consideration |
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¥ 4,200
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| Guangxi Yuchai Machinery Monopoly Development Company Limited [Member] | Yunnan Yuchai Machinery Industry Company Limited [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Acquisition of equity interest |
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40.00%
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| Offsetting trade receivables |
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¥ 18,300
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| Guangxi Yuchai Machinery Monopoly Development Company Limited [Member] | Sichuan Yuchai Machinery Industry Company Limited [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Acquisition of equity interest |
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47.53%
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| Additional investment in subsidiaries |
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¥ 8,900
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| Guangxi Yuchai Machinery Monopoly Development Company Limited [Member] | Hunan Yuchai Machinery Industry Company Limited [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Acquisition of equity interest |
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49.00%
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| Additional investment in subsidiaries |
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¥ 6,700
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| Guangxi Yuchai Accessories Manufacturing Company Limited [Member] | Guangxi Yuchai Crankshaft Company Limited [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Acquisition of equity interest |
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25.00%
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| Additional investment in subsidiaries |
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¥ 1,300
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| Jining Yuchai Engine Company Limited [Member] | Yuchai [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Acquisition of equity interest |
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100.00%
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100.00%
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100.00%
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| Additional investment in subsidiaries |
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¥ 250
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| Percentage of ownership control prior to acquisition |
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100.00%
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| YC Europe Co. Limited [Member] | Yuchai [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Percentage of additional equity interests acquired |
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32.50%
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32.50%
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| Percentage of ownership interest in joint venture |
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67.50%
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35.00%
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| HL Global Enterprises Limited [Member] | LKN Investment International Pte. Ltd and Shanghai Hutai Real Estate Development Co. [Member] |
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| Disclosure of subsidiaries [Line Items] |
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| Cash consideration, disposal |
¥ 395,000
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$ 62,400
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