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OPERATING SEGMENT INFORMATION - Segment Capital Expenditures (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of operating segments [line items]      
Capital expenditures € (232) € (182) € (271)
P&ARP      
Disclosure of operating segments [line items]      
Capital expenditures (94) (73) (96)
A&T      
Disclosure of operating segments [line items]      
Capital expenditures (70) (45) (72)
AS&I      
Disclosure of operating segments [line items]      
Capital expenditures (62) (61) (97)
H&C      
Disclosure of operating segments [line items]      
Capital expenditures € (6) € (3) € (6)