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Income Tax Benefits / (Expenses) - Summary of Tax Losses Carried Forward (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Details of Tax Losses Carried Forward For Which No Deferred Tax Assets Were Recognized [line Items]    
Unused tax losses for which no deferred tax asset recognised € 924,874 € 787,747
Expiry within 5 years [member]    
Disclosure of Details of Tax Losses Carried Forward For Which No Deferred Tax Assets Were Recognized [line Items]    
Unused tax losses for which no deferred tax asset recognised 57,616 76,457
Expiry over 5 years [member]    
Disclosure of Details of Tax Losses Carried Forward For Which No Deferred Tax Assets Were Recognized [line Items]    
Unused tax losses for which no deferred tax asset recognised 154,293 141,342
No expiration [member]    
Disclosure of Details of Tax Losses Carried Forward For Which No Deferred Tax Assets Were Recognized [line Items]    
Unused tax losses for which no deferred tax asset recognised € 712,965 € 569,948