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Investments in Subsidiaries - Additional Information (Detail) ¥ in Millions, $ in Millions		1 Months Ended
	Nov. 30, 2022 CNY (¥)	Feb. 28, 2023 CNY (¥)	Dec. 31, 2023 CNY (¥)	Dec. 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2022 CNY (¥)
Disclosure of subsidiaries [line items]
Cash and cash equivalents subject to local exchange control regulations			¥ 4,934.6	$ 694.7		¥ 3,713.3
Suzhou reman [member]
Disclosure of subsidiaries [line items]
Cash consideration			¥ 34.0	$ 241.7
Yuchai Xin-Lan [member]
Disclosure of subsidiaries [line items]
Cash consideration	¥ 50.0	¥ 20.0			$ 2.8
Percent of shareholding in subsidiary	69.50%	67.00%

X

- Definition

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

+ References

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- Definition

The amount in the consolidated financial statements of the assets of the group to which significant restrictions (for example, statutory, contractual and regulatory restrictions) apply on the entity's ability to access or use the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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