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DISPOSAL GROUPS CLASSIFIED AS HELD FOR SALE - Narrative (Details) - EUR (€)
€ in Millions
3 Months Ended 6 Months Ended
Feb. 02, 2023
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disclosure of analysis of single amount of discontinued operations [line items]          
Losses on disposal   € 0 € 0 € (6) € (1)
Disposal groups classified as held for sale          
Disclosure of analysis of single amount of discontinued operations [line items]          
Losses on disposal € (5)     € 5