Other non-current assets - Joint ventures (Details) - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Other non-current assets
Other non-current assets	€ 21	€ 20
Joint ventures	€ 8	€ 6

The amount of non-current assets that the entity does not separately disclose in the same statement or note. [Refer: Non-current assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_OtherNoncurrentAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant