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Other financial liability - Additional Information (Detail)
¥ in Millions, $ in Millions
1 Months Ended
Feb. 28, 2023
CNY (¥)
Feb. 28, 2023
USD ($)
Nov. 30, 2022
CNY (¥)
Feb. 01, 2023
Nov. 01, 2022
Disclosure Of Other Liabilities [Line Items]          
Minority interest ownership percentage by noncontrolling owners       3.20% 9.10%
Yuchai Xin-Lan [member]          
Disclosure Of Other Liabilities [Line Items]          
Proceeds from changes in ownership interests in subsidiaries that do not result in loss of control ¥ 20.0 $ 2.8 ¥ 50.0