Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Other income - Summary of Other Income (Detail)

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Other income - Summary of Other Income (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Other Income (Expenses) [Line Items]      
Government grants € 213 € 2,037 € 2,302
Income from sale of CO2 tickets 9,527 5,403 2,396
Net gain/(loss) on disposal of property, plant and equipment (12,528) (210) 7
Sublease rental income 200 200 0
Other items 2,525 523 724
Total 3,724 10,853 5,429
Purchase options      
Disclosure of Other Income (Expenses) [Line Items]      
Fair value gains/(losses) on derivatives (purchase options) 3,856 2,900 0
Investments in equity securities      
Disclosure of Other Income (Expenses) [Line Items]      
Fair value gains/(losses) on derivatives (purchase options) € (69) € 0 € 0