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Guarantees, commitments and risks (Details 4) - EUR (€) € in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities | [1] | € 25,620 | € 29,318
Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 5,253 | 8,492
Later than one year and not later than two years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 4,148 | 2,126
Later than two years and not later than three years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 2,867 | 4,120
Later than three years and not later than four years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,280 | 2,914
Later than four years and not later than five years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,262 | 1,331
Later than Five Years [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 10,810 | 10,335
Non current financial liabilities [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 22,276 | 23,653
Non current financial liabilities [Member] | Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 2,000 | 2,988
Non current financial liabilities [Member] | Later than one year and not later than two years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 4,084 | 2,090
Non current financial liabilities [Member] | Later than two years and not later than three years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 2,857 | 4,044
Non current financial liabilities [Member] | Later than three years and not later than four years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,279 | 2,914
Non current financial liabilities [Member] | Later than four years and not later than five years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,246 | 1,285
Non current financial liabilities [Member] | Later than Five Years [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 10,810 | 10,332
Current financial liabilities [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 2,242 | 3,396
Current financial liabilities [Member] | Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 2,242 | 3,396
Fair value of derivative instruments [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,102 | 2,269
Fair value of derivative instruments [Member] | Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1,011 | 2,108
Fair value of derivative instruments [Member] | Later than one year and not later than two years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 64 | 36
Fair value of derivative instruments [Member] | Later than two years and not later than three years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 10 | 76
Fair value of derivative instruments [Member] | Later than three years and not later than four years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 1 |
Fair value of derivative instruments [Member] | Later than four years and not later than five years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  | 16 | 46
Fair value of derivative instruments [Member] | Later than Five Years [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Financial liabilities |  |  | 3
Interest on finance debt [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 3,513 | 4,007
Interest on finance debt [Member] | Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 582 | 696
Interest on finance debt [Member] | Later than one year and not later than two years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 511 | 557
Interest on finance debt [Member] | Later than two years and not later than three years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 411 | 486
Interest on finance debt [Member] | Later than three years and not later than four years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 304 | 386
Interest on finance debt [Member] | Later than four years and not later than five years [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 250 | 277
Interest on finance debt [Member] | Later than Five Years [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 1,455 | 1,605
Financial guarantees [Member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | 473 | 84
Financial guarantees [Member] | Not later than one year [member] |  |  |
DisclosureOfContingentLiabilitiesExplanatoryLineItems [Line Items] |  |  |
Other financial liabilities |  | € 473 | € 84
[1] | Income or expense were recognized in the profit and loss account within &#147;Finance income (expense)&#148;.

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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
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