CURRENCY GAINS / (LOSSES) (Tables)

12 Months Ended

Dec. 31, 2019

Analysis of income and expense [abstract]

Schedule of Currency Gains and Losses Included in Income from Operations

Currency gains and losses, which are included in Income from operations, are as follows:

(in millions of Euros)	Notes	Year ended December 31, 2019		Year ended December 31, 2018		Year ended December 31, 2017
Included in Revenue	24	(7	)	2		2
Included in Cost of sales		1		2		(4	)
Included in Other gains / (losses) - net		9		7		(4	)
Total		3		11		(6	)
Realized exchange gains / (losses) on foreign currency derivatives - net	24	1		11		(15	)
Unrealized gains / (losses) on foreign currency derivatives - net	24	1		(3	)	17
Exchange gains / (losses) from the remeasurement of monetary assets and liabilities - net		1		3		(8	)
Total		3		11		(6	)

Schedule of Foreign Currency Translation Reserve

(in millions of Euros)	At December 31, 2019	At December 31, 2018
Foreign currency translation reserve at January 1	3	(7	)
Effect of currency translation differences	1	10
Foreign currency translation reserve at December 31	4	3