Business Combinations and Acquisitions of Non-Controlling Interests - Finalization of the Purchase Price Allocation of GVT (Details) - GVT € in Millions	Sep. 19, 2014 EUR (€)
Disclosure of detailed information about business combination [line items]
Gross cash consideration	€ 4,663
Percent of share capital transferred	0.12

The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph f
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f_i&doctype=Appendix&seq=2
-URIDate 2017-03-09

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