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Note 25 - Post-employment and other employee benefit commitments - Actuarial Assumptions (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Actuarial assumptions of commitments Line Items |  |  |
Discount rate shown as the end of the exercise | In Spain, the discount rate shown as of December, 31, 2017, corresponds to the weighted average rate, the actual discount rates used are 0.50% and 1.75% depending on the type of commitment. |  |
Spain [Member] |  |  |
Actuarial assumptions of commitments Line Items |  |  |
Actuarial assumptions of commitments | 1.24% | 1.50% | 2.00%
Actuarial Assumption Of Expected Rates Of Salary Increases | 0.00% | 1.50% | 2.00%
Actuarial Assumption Of Expected Rates Of Pension Increases | 0.00% | 0.00% | 0.00%
Actuarial Assumption Of Medical Cost Trend Rates | 0.00% | 0.00% | 0.00%
Mortality Table | PERM/F 2000P | PERM/F 2000P | PERM/F 2000P
Mexico [Member] |  |  |
Actuarial assumptions of commitments Line Items |  |  |
Actuarial assumptions of commitments | 9.48% | 9.95% | 9.30%
Actuarial Assumption Of Expected Rates Of Salary Increases | 4.75% | 4.75% | 4.75%
Actuarial Assumption Of Expected Rates Of Pension Increases | 2.13% | 2.13% | 2.13%
Actuarial Assumption Of Medical Cost Trend Rates | 7.00% | 6.75% | 6.75%
Mortality Table | EMSSA09 | EMSSA97 (adjustment EMSSA09) | EMSSA 97
USA [Member] |  |  |
Actuarial assumptions of commitments Line Items |  |  |
Actuarial assumptions of commitments | 3.57% | 4.04% | 4.30%
Actuarial Assumption Of Expected Rates Of Salary Increases | 0.00% | 3.00% | 3.00%
Actuarial Assumption Of Expected Rates Of Pension Increases | 0.00% | 0.00% | 0.00%
Actuarial Assumption Of Medical Cost Trend Rates | 0.00% | 0.00% | 0.00%
Mortality Table | RP 2014 | RP 2014 | RP 2014
Turkey [Member] |  |  |
Actuarial assumptions of commitments Line Items |  |  |
Actuarial assumptions of commitments | 11.60% | 11.50% | 10.30%
Actuarial Assumption Of Expected Rates Of Salary Increases | 9.90% | 9.30% | 8.60%
Actuarial Assumption Of Expected Rates Of Pension Increases | 8.40% | 7.80% | 7.10%
Actuarial Assumption Of Medical Cost Trend Rates | 12.60% | 10.92% | 9.94%
Mortality Table | CSO2001 | CSO2001 | CSO2001

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_144&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_144&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_144&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2016-01-13 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2016-03-30&anchor=para_144&doctype=Standard -URIDate 2016-03-31 + Details
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