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Financial assets held for trading (Details) - EUR (€) € in Millions		Dec. 31, 2017	Dec. 31, 2016
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading	[1]	€ 6,012	€ 6,166
Quoted bonds issued by sovereign states [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		1,022	996
Other [Member]
DisclosureOfFinancialAssetsHeldForTradingLineItems [Line Items]
Current financial assets at fair value through profit or loss, classified as held for trading		€ 4,990	€ 5,170
[1] Income or expense were recognized in the profit and loss account within “Finance income (expense)”.

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- References

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- Definition

The amount of current financial assets measured at fair value through profit or loss classified as held for trading. [Refer: Financial assets at fair value through profit or loss, classified as held for trading]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 8
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-URIDate 2017-03-09

Reference 2: 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

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