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Financial expenses and income (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about finance income expense [Line Items]
Cost of debt	€ (365)	€ (313)	€ (328)
Interest income	241	54	103
Cost of net debt	(124)	(259)	(225)
Non-operating foreign exchange gains/(losses)	(4)	2	(6)
Unwinding of discounting of provisions	(20)	(11)	(11)
Net interest cost related to employee benefits	(47)	(44)	(57)
Gains/(losses) on disposals of financial assets	1	3	6
Net interest expense on lease liabilities	(40)	(35)	(38)
Other	0	16	(4)
Net financial income/(expenses)	(234)	(328)	(335)
comprising: Financial expenses	(440)	(368)	(388)	[1]
comprising: financial income	206	40	53	[1]
Interest rate and currency derivatives used to hedge debt
Disclosure of detailed information about finance income expense [Line Items]
Gain on derivatives used to manage debt	(11)	14	93
Gain on derivatives used to manage cash and cash equivalents	€ 68	€ 51	€ 66
[1] Includes the impacts of the IFRIC final agenda decisions of March 2021 on the costs of configuring or customising application software used in a Software as a Service (SaaS) arrangement and of April 2021 on the attribution of benefits to periods of service, as described in Note A.2.1. to the consolidated financial statements for the year ended December 31, 2021.

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- Definition

The amount of expense recognised due to the unwinding of the discount on provisions other than provisions from employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions]

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The amount of finance income or cost that the entity does not separately disclose in the same statement or note. [Refer: Finance income (cost)]

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