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Provisions for employee benefits (Details 1) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | € 868 |
Present value of benefit liabilities at end of year | 1,022 | € 868
TFR [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 298 |
Interest cost/income | 3 | 6
Remeasurements: | (6) | 19
- actuarial (gains) losses due to changes in demographic assumptions |  | (2)
- actuarial (gains) losses due to changes in financial assumptions | (5) | 11
- experience (gains) losses | (1) | 10
Present value of benefit liabilities at end of year | 284 | 298
Foreign defined benefit plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 276 |
Current cost | 24 | 28
Interest cost/income | 9 | 14
Return on plan assets | (12) | (42)
Remeasurements: | 42 | (20)
- actuarial (gains) losses due to changes in demographic assumptions | (14) | (2)
- actuarial (gains) losses due to changes in financial assumptions | 71 | 30
- experience (gains) losses | (3) | (6)
Past service cost and (gains) losses settlements | (1) | (4)
Present value of benefit liabilities at end of year | 409 | 276
FISDE and other foreign medical plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 124 |
Current cost | 2 | 2
Interest cost/income | 2 | 3
Remeasurements: | (1) | (17)
- actuarial (gains) losses due to changes in demographic assumptions |  | (1)
- actuarial (gains) losses due to changes in financial assumptions |  | (2)
- experience (gains) losses | (1) | (14)
Past service cost and (gains) losses settlements |  | 2
Present value of benefit liabilities at end of year | 122 | 124
Other benefit plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 170 |
Current cost | 54 | 56
Interest cost/income | 1 | 1
Remeasurements: |  | 2
- actuarial (gains) losses due to changes in demographic assumptions |  | 1
- actuarial (gains) losses due to changes in financial assumptions |  | 1
Past service cost and (gains) losses settlements | 30 | (3)
Present value of benefit liabilities at end of year | 207 | 170
Present Value Of Defined Benefit Obligation [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 1,487 | 1,830
Current cost | 80 | 86
Interest cost/income | 35 | 44
Remeasurements: | 50 | 25
- actuarial (gains) losses due to changes in demographic assumptions | (14) | (7)
- actuarial (gains) losses due to changes in financial assumptions | 69 | 41
- experience (gains) losses | (5) | (9)
Past service cost and (gains) losses settlements | 29 | (8)
Plan contributions: | 1 | 1
- employee contributions | 1 | 1
Benefits paid | (89) | (78)
Reclassification to asset held for sale | (14) |
Changes in the scope of consolidation | (20) |
Currency translation differences and other changes | 51 | (413)
Present value of benefit liabilities at end of year | 1,610 | 1,487
Present Value Of Defined Benefit Obligation [Member] | TFR [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 298 | 281
Interest cost/income | 3 | 6
Remeasurements: | (6) | 19
- actuarial (gains) losses due to changes in demographic assumptions |  | (2)
- actuarial (gains) losses due to changes in financial assumptions | (5) | 11
- experience (gains) losses | (1) | 10
Benefits paid | (10) | (8)
Changes in the scope of consolidation | (1) |
Present value of benefit liabilities at end of year | 284 | 298
Present Value Of Defined Benefit Obligation [Member] | Foreign defined benefit plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 895 | 1,240
Current cost | 24 | 28
Interest cost/income | 29 | 34
Remeasurements: | 54 | 22
- actuarial (gains) losses due to changes in demographic assumptions | (14) | (2)
- actuarial (gains) losses due to changes in financial assumptions | 71 | 30
- experience (gains) losses | (3) | (6)
Past service cost and (gains) losses settlements | (1) | (7)
Plan contributions: | 1 | 1
- employee contributions | 1 | 1
Benefits paid | (37) | (33)
Reclassification to asset held for sale | (12) |
Changes in the scope of consolidation | (15) |
Currency translation differences and other changes | 59 | (390)
Present value of benefit liabilities at end of year | 997 | 895
Present Value Of Defined Benefit Obligation [Member] | FISDE and other foreign medical plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 124 | 156
Current cost | 2 | 2
Interest cost/income | 2 | 3
Remeasurements: | (1) | (17)
- actuarial (gains) losses due to changes in demographic assumptions |  | (1)
- actuarial (gains) losses due to changes in financial assumptions |  | (2)
- experience (gains) losses | (1) | (14)
Past service cost and (gains) losses settlements |  | 2
Benefits paid | (5) | (6)
Changes in the scope of consolidation | (1) |
Currency translation differences and other changes | 1 | (16)
Present value of benefit liabilities at end of year | 122 | 124
Present Value Of Defined Benefit Obligation [Member] | Other benefit plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 170 | 153
Current cost | 54 | 56
Interest cost/income | 1 | 1
Remeasurements: | 3 | 1
- actuarial (gains) losses due to changes in demographic assumptions |  | (2)
- actuarial (gains) losses due to changes in financial assumptions | 3 | 2
- experience (gains) losses |  | 1
Past service cost and (gains) losses settlements | 30 | (3)
Benefits paid | (37) | (31)
Reclassification to asset held for sale | (2) |
Changes in the scope of consolidation | (3) |
Currency translation differences and other changes | (9) | (7)
Present value of benefit liabilities at end of year | 207 | 170
Plan Assets [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 619 | 707
Interest cost/income | 20 | 20
Return on plan assets | 12 | 42
Past service cost and (gains) losses settlements |  | (3)
Plan contributions: | 24 | 25
- employee contributions | 1 | 1
- employer contributions | 23 | 24
Benefits paid | (25) | (19)
Changes in the scope of consolidation | (15) |
Currency translation differences and other changes | (47) | (153)
Present value of benefit liabilities at end of year | 588 | 619
Plan Assets [Member] | Foreign defined benefit plans [Member] |  |
Statement Line Items [Line Items] |  |
Present value of benefit liabilities at beginning of year | 619 | 707
Interest cost/income | 20 | 20
Return on plan assets | 12 | 42
Past service cost and (gains) losses settlements |  | (3)
Plan contributions: | 24 | 25
- employee contributions | 1 | 1
- employer contributions | 23 | 24
Benefits paid | (25) | (19)
Changes in the scope of consolidation | (15) |
Currency translation differences and other changes | (47) | (153)
Present value of benefit liabilities at end of year | € 588 | € 619

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_iii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_f&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_f&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_f&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from business combinations and disposals. [Refer: Business combinations [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_h&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost and gains (losses) arising from settlements. [Refer: Gains (losses) arising from settlements, net defined benefit liability (asset); Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan in respect of settlements. [Refer: Gains (losses) arising from settlements, net defined benefit liability (asset); Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_g&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets. The return on plans assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_i&doctype=Standard -URIDate 2017-03-09 + Details
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