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Revenue from Contracts with Customers - Summary of Disaggregation of Group's Revenue from Contracts with Customers (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers ¥ 21,265,930 $ 3,363,691 ¥ 20,581,170 ¥ 18,016,085
At a point in time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 21,218,785 3,356,234 20,518,030 17,935,600
Over time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 47,145 7,457 63,140 80,485
People's Republic of China [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 21,206,280 3,354,256 20,504,288 17,913,615
Other countries [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 59,650 9,435 76,882 102,470
Heavy-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 7,410,771 1,172,182 6,725,312 6,189,934
Medium-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 7,065,283 1,117,535 6,626,629 5,583,982
Light-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 2,429,745 384,320 2,356,168 2,429,248
Other Products And Services [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 4,304,995 680,933 4,809,921 3,732,436
Revenue from hospitality operations [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 55,136 $ 8,721 63,140 80,485
Yuchai segment [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 21,254,134   20,557,660 17,980,304
Yuchai segment [member] | At a point in time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 21,210,718   20,518,030 17,935,600
Yuchai segment [member] | Over time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 43,416   39,630 44,704
Yuchai segment [member] | People's Republic of China [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 21,206,280   20,504,288 17,913,615
Yuchai segment [member] | Other countries [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 47,854   53,372 66,689
Yuchai segment [member] | Heavy-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 7,410,771   6,725,312 6,189,934
Yuchai segment [member] | Medium-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 7,065,283   6,626,629 5,583,982
Yuchai segment [member] | Light-duty engines [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 2,429,745   2,356,168 2,429,248
Yuchai segment [member] | Other Products And Services [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 4,304,918   4,809,921 3,732,436
Yuchai segment [member] | Revenue from hospitality operations [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 43,417   39,630 44,704
HL Global Enterprises Limited segment [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 11,796   23,510 35,781
HL Global Enterprises Limited segment [member] | At a point in time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 8,067      
HL Global Enterprises Limited segment [member] | Over time [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 3,729   23,510 35,781
HL Global Enterprises Limited segment [member] | Other countries [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 11,796   23,510 35,781
HL Global Enterprises Limited segment [member] | Other Products And Services [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers 77      
HL Global Enterprises Limited segment [member] | Revenue from hospitality operations [member]        
Disclosure of disaggregation of revenue from contracts with customers [line items]        
Total revenue from contracts with customers ¥ 11,719   ¥ 23,510 ¥ 35,781