Pensions and other post-employment benefits - Net balance (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017
Net defined benefit
Net defined benefit balance	€ (103)	€ (461)
United States Pension benefits
Net defined benefit
Net defined benefit balance	2,684	2,418
United States Post-retirement benefits
Net defined benefit
Net defined benefit balance	(1,987)	(1,986)
Other pensions
Net defined benefit
Net defined benefit balance	€ (800)	€ (893)

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2018-01-01
-Paragraph 140
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_LiabilityAssetOfDefinedBenefitPlans
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant