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INTANGIBLE ASSETS AND GOODWILL (Tables)
6 Months Ended
Jun. 30, 2021
Intangible assets and goodwill [abstract]  
Schedule of Changes in Intangible Assets and Goodwill
(in millions of Euros)TechnologyComputer SoftwareCustomer relationshipsWork in ProgressOtherTotal Intangible AssetsGoodwill
Net balance at January 1, 202118151313261417
Additions22
Amortization expense(1)(4)(5)
Transfer4(4)
Effect of changes in foreign exchange rates1113
Net balance at June 30, 202118151311259430
Cost828038122214430
Less accumulated depreciation and impairment(64)(65)(25)(1)(155)
Net balance at June 30, 202118151311259430