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Group information - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Mar. 30, 2021 | Dec. 31, 2020
Disclosure of non-adjusting events after reporting period [line items] |  |
Date of end of reporting period |  | Dec. 31, 2020
Authorization Of Financial Statements [Member] |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Date of authorisation for issue of financial statements | Mar. 30, 2021 |

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- Definition The date on which financial statements are authorised for issue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 10 -IssueDate 2020-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=10&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The date of the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 51 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_51_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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