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Income tax - Summary of Reconciliation Between Reported Tax Expense and Theoretical Tax Expense Loss Before Taxes (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Income Tax [Abstract]      
Income/(loss) before tax € 249 € (709) € (131)
Tax using the Luxembourg tax rate 62 (177) (33)
Effect of tax rates in foreign jurisdictions 1 12 2
Permanent differences (35) 54 58
Change in unrecognized deferred taxes 239 (9) 29
Adjustments in respect of previous years 1 (9) (1)
Foreign withholding taxes 12 1 0
Other 3 0 0
Income tax expense/(benefit) € 283 € (128) € 55