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Right-of-use-assets - Summary of Breakdown of Right-of-use Assets Based on Geographical Location (Detail) - EUR (€) € in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | € 50,755 | € 49,013 | € 54,718
United States of America [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 15,853 | 14,643 |
Italy [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 11,977 | 9,671 |
Spain [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 4,809 | 5,382 |
United Kingdom [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 7,625 | 9,274 |
China [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 4,076 | 5,484 |
Other countries [member] |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | € 6,415 | € 4,559 |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_j&doctype=Standard -URIDate 2021-03-24 + Details
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