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Taxation - Breakdown of certain net deferred tax asset positions by jurisdiction (Details) - EUR (€)
€ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets € 308 € 483
Poland    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 244 391
France    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 70
Slovakia    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 1
China    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 2
Australia    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 1
Hong Kong    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 8 6
USA    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 1
Türkiye    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets 41 7
Taiwan    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Certain deferred tax assets € 11 € 8