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Investment in Joint Ventures - Share of Results of Joint Ventures and Carrying Amount of Investment to Joint Ventures (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended |
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2023 USD ($)
Disclosure of joint ventures [line items] |  |  |  |  |
Share of results of joint ventures, net of tax: | ¥ 62,083 | $ 8,740 | ¥ (27,546) | ¥ (95,985) |
Carrying amount of investments | 237,229 |  | 154,703 | 151,095 | $ 33,396
Y & C Engine Co., Ltd. [member] |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |
Share of results of joint ventures, net of tax: | (4,019) | (566) | (54,116) | (125,853) |
Carrying amount of investments | 12,977 |  | 488 |  | 1,827
MTU Yuchai Power Co., Ltd [member] |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |
Share of results of joint ventures, net of tax: | 74,727 | 10,520 | 40,279 | 28,037 |
Carrying amount of investments | 203,156 |  | 128,140 |  | 28,599
Guangxi Purem Yuchai Automotive Technology Co., Ltd [member] |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |
Share of results of joint ventures, net of tax: | (4,508) | (635) | (11,278) | 1,377 |
Carrying amount of investments | 15,869 |  | 20,377 |  | 2,234
Other Joint Ventures [member] |  |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |  |
Share of results of joint ventures, net of tax: | (4,117) | $ (579) | (2,431) | ¥ 454 |
Carrying amount of investments | ¥ 5,227 |  | ¥ 5,698 |  | $ 736

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- Definition The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_10&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The entity's share of the profit (loss) of joint ventures accounted for using the equity method. [Refer: Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard -URIDate 2023-03-23 + Details
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