INTANGIBLE ASSETS (INCLUDING GOODWILL) (Tables)

12 Months Ended

Dec. 31, 2019

Intangible assets and goodwill [abstract]

Schedule of Changes in Intangible Assets and Goodwill

(in millions of Euros)	Notes	Goodwill	Technology		Computer Software		Customer relationships		Work in Progress		Other	Total intangible assets (excluding goodwill)
Net balance at January 1, 2019		422	22		18		15		13		2	70
Intangible assets acquired through business combination	3	24	—		—		—		—		—	—
Additions		—	—		1		—		8		—	9
Amortization expense		—	(1	)	(8	)	(1	)	—		—	(10	)
Transfer during the year		—	—		7		—		(7	)	—	—
Effects of changes in foreign exchange rates		9	—		1		—		—		—	1
Net balance at December 31, 2019		455	21		19		14		14		2	70
Cost		455	87		73		39		16		2	217
Less accumulated depreciation and impairment		—	(66	)	(54	)	(25	)	(2	)	—	(147	)
Net balance at December 31, 2019		455	21		19		14		14		2	70

(in millions of Euros)	Goodwill	Technology		Computer Software		Customer relationships		Work in Progress		Other		Total intangible assets (excluding goodwill)
Net balance at January 1, 2018	403	24		18		15		9		2		68
Additions	—	—		2		—		8		1		11
Amortization expense	—	(3	)	(8	)	(1	)	—		(1	)	(13	)
Transfer during the year	—	—		5		—		(5	)	—		—
Effects of changes in foreign exchange rates	19	1		1		1		1		—		4
Net balance at December 31, 2018	422	22		18		15		13		2		70
Cost	422	84		65		39		13		3		204
Less accumulated depreciation and impairment	—	(62	)	(47	)	(24	)	—		(1	)	(134	)
Net balance at December 31, 2018	422	22		18		15		13		2		70