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Note 18 - Intangible assets Sensitivity analysis (Details) € in Millions | Dec. 31, 2018 EUR (€)
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United States [Member] | Impact Of An Increase 50 Percent Basis Point [Member] | Discount Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | € (1,009) | [1]
United States [Member] | Impact Of An Increase 50 Percent Basis Point [Member] | Sustainable Growth Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | 526 | [1]
United States [Member] | Impact Of A Decrease 50 Percent Basis Point [Member] | Discount Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | 1,176 | [1]
United States [Member] | Impact Of A Decrease 50 Percent Basis Point [Member] | Sustainable Growth Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | (451) | [1]
Turkey [Member] | Impact Of An Increase 50 Percent Basis Point [Member] | Discount Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | (149) | [2]
Turkey [Member] | Impact Of An Increase 50 Percent Basis Point [Member] | Sustainable Growth Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | 40 | [2]
Turkey [Member] | Impact Of A Decrease 50 Percent Basis Point [Member] | Discount Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | 158 | [2]
Turkey [Member] | Impact Of A Decrease 50 Percent Basis Point [Member] | Sustainable Growth Rate [Member] |  |
Disclosure of sensitivity analysis for main assumptions Line Items |  |
Discount rates applied to cash flow projections percentage | € (37) | [2]
[1] | (*) Based on historical changes, the use of 50 basis points to calculate the se nsitivity analysis would be a reasonable variation with respect to the observed variations over the last five years.
[2] | (*) Based on historical changes, the use of 50 basis points to calculate the sensitivity analysis would be a reasonable v ariation with respect to the observed variations over the last five years.

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