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Accounting information and policies - Additional Information (Detail)
€ in Millions
 12 Months Ended
Dec. 31, 2021
EUR (€)
Nov. 29, 2020
company
Nov. 28, 2020
company
Disclosure Of Summary Of Significant Accounting Policies [Line Items]      
Number of parent companies | company   1 2
Net monetary loss € 74    
Hyperinflation restatement      
Disclosure Of Summary Of Significant Accounting Policies [Line Items]      
Increase in total assets 106    
Increase in turnover 124    
Reduction in operating profit € 2