Fixed assets - Gains (losses) on disposal of fixed assets (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other intangible assets and property, plant and equipment [abstract]
Transfer price	€ 610	€ 224	€ 124
Net book value of assets sold	(307)	(44)	(36)
Proceeds from the disposal of fixed assets	€ 303	€ 180	€ 88

The gains (losses) on disposals of property, plant and equipment. [Refer: Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 98
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_98_c&doctype=Standard
-URIDate 2019-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration