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Provisions - Summary of Provisions (Detail) - Product warranty provision [member]
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Disclosure of other provisions [line items]        
Beginning balance ¥ 256,080 $ 35,696 ¥ 220,114 $ 30,683
Provision made 626,255 87,298 414,021 57,713
Provision utilized (493,770) (68,830) (375,910) (52,401)
Disposal of a subsidiary     (2,145) (299)
Ending balance ¥ 388,565 $ 54,164 ¥ 256,080 $ 35,696