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Note 25 - Post-employment and other employee benefit commitments - Sensitivity Analysis (Details) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Sensitivity Analysis Line Items |  |  |
Other long term employee benefits | € 67 | € 69 | € 68
Discount Rate [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Variation Of Reasonably Possible Increase In Actuarial Assumption | 50 | 50 |
Increase | € (352) | € (367) |
Decrease | € 386 | € 401 |
Rate of salary increase [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Variation Of Reasonably Possible Increase In Actuarial Assumption | 50 | 50 |
Increase | € 5 | € 9 |
Decrease | € (5) | € (9) |
Rate of pension increase [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Variation Of Reasonably Possible Increase In Actuarial Assumption | 50 | 50 |
Increase | € 23 | € 28 |
Decrease | € (22) | € (27) |
Medical cost trend rate [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Variation Of Reasonably Possible Increase In Actuarial Assumption | 100 | 100 |
Increase | € 290 | € 263 |
Decrease | € (225) | € (204) |
Change in obligation from each additional year of longevity [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Variation Of Reasonably Possible Increase In Actuarial Assumption | - | - |
Increase | € 155 | € 121 |
Decrease | € 0 | € 0 |

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_145_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_145_a&doctype=Standard -URIDate 2016-03-31 + Details
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