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Discontinued operations and assets classified as held for sale - Net cash provided by (used for) discontinued operations (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Discontinued operations and assets classified as held for sale [Abstract]      
Cash flows from (used in) operating activities, discontinued operations € (27) € 85 € 129
Cash flows from (used in) investing activities, discontinued operations 15 3,319  
Increase (decrease) in cash and cash equivalents, discontinued operations € (12) € 3,403 € 129