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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
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Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | ¥ 20,581,170 | $ 3,180,376 | ¥ 18,016,085 | ¥ 16,263,248
At a point in time [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 20,518,030 | 3,170,619 | 17,935,600 | 16,166,390
Over time [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 63,140 | 9,757 | 80,485 | 96,858
People's Republic of China [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 20,504,288 | 3,168,496 | 17,913,615 | 16,119,896
Other countries [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 76,882 | 11,880 | 102,470 | 143,352
Heavy-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 6,725,312 | 1,039,252 | 6,189,934 | 4,934,435
Medium-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 6,626,629 | 1,024,003 | 5,583,982 | 5,537,164
Light-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 2,356,168 | 364,095 | 2,429,248 | 2,481,554
Other Products And Services [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 4,809,921 | 743,269 | 3,732,436 | 3,213,237
Revenue from hospitality operations [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 63,140 | $ 9,757 | 80,485 | 96,858
Yuchai segment [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 20,557,660 |  | 17,980,304 | 16,210,467
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 | 20,518,030 |  | 17,935,600 | 16,166,390
Yuchai segment [member] | Over time [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 39,630 |  | 44,704 | 44,077
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 | 20,504,288 |  | 17,913,615 | 16,119,896
Yuchai segment [member] | Other countries [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 53,372 |  | 66,689 | 90,571
Yuchai segment [member] | Heavy-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 6,725,312 |  | 6,189,934 | 4,934,435
Yuchai segment [member] | Medium-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 6,626,629 |  | 5,583,982 | 5,537,164
Yuchai segment [member] | Light-duty engines [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 2,356,168 |  | 2,429,248 | 2,481,554
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 | 4,809,921 |  | 3,732,436 | 3,213,237
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 | 39,630 |  | 44,704 | 44,077
HL Global Enterprises Limited segment [member] |  |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |  |
Total revenue from contracts with customers | 23,510 |  | 35,781 | 52,781
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 | 23,510 |  | 35,781 | 52,781
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 | 23,510 |  | 35,781 | 52,781
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 | ¥ 23,510 |  | ¥ 35,781 | ¥ 52,781

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_113_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_114&doctype=Standard -URIDate 2020-01-01 + Details
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