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v3.21.1

Income Tax - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income tax [Line Items] |  |  |  |
Applicable tax rate | 20.00% | 20.00% | 20.00% | 17.00%
Unappropriated earnings [Member] |  |  |  |
Income tax [Line Items] |  |  |  |
Applicable tax rate |  |  | 5.00% | 10.00%
China [Member] |  |  |  |
Income tax [Line Items] |  |  |  |
Applicable tax rate | 25.00% | 25.00% | 25.00% |

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- Definition Income tax. + References No definition available. + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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