Post-employment benefits - Non-current Employee Benefit Liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2021	Dec. 31, 2020
Employee Benefits [Abstract]
Retirement benefit obligation	€ 103	€ 251
Other employee benefit liabilities	35	32
Total non-current employee benefit liabilities	€ 138	€ 283

The amount of non-current provisions for employee benefits. [Refer: Provisions for employee benefits]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 78
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_d&doctype=Standard
-URIDate 2021-03-24

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