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Financial liabilities (Details 5) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Information on net borrowings [Line Items]
Financial liabilities, at fair value		€ 23,764
Ordinary Bonds [Member]
Disclosure Of Information on net borrowings [Line Items]
Financial liabilities, at fair value		19,219
Convertible Bonds [Member]
Disclosure Of Information on net borrowings [Line Items]
Financial liabilities, at fair value		410
Banks [Member]
Disclosure Of Information on net borrowings [Line Items]
Financial liabilities, at fair value		4,021
Other financial institutions [Member]
Disclosure Of Information on net borrowings [Line Items]
Financial liabilities, at fair value		€ 114

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- Definition

Disclosure Of Borrowings Explanatory

+ References

No definition available.

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- Definition

The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard
-URIDate 2018-03-16

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