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Note 29 - Treasury Shares Shares Accepted In Pledge and Treasury Stock (Details) - € / shares | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 29, 2017 | Dec. 31, 2016 | Sep. 28, 2016 | Mar. 31, 2016
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Treasury Stock Line Items |  |  |  |  |  |
Number Of Shares In Pledge | 61,632,832 | 64,633,003 |  | 90,731,198 |  |
Par Value Per Share | € 0.49 | € 0.49 | € 0.49 | € 0.49 | € 0.49 | € 0.49
Percentage Share Capital | 0.92% | 0.97% |  | 1.38% |  |
Bottom Of Range Member |  |  |  |  |  |
Treasury Stock Line Items |  |  |  |  |  |
Percentage Treasury Stock | 0.20% | 0.004% |  | 0.081% |  |
Top Of Range [Member] |  |  |  |  |  |
Treasury Stock Line Items |  |  |  |  |  |
Percentage Treasury Stock | 0.85% | 0.278% |  | 0.756% |  |
Closing range [Member] |  |  |  |  |  |
Treasury Stock Line Items |  |  |  |  |  |
Percentage Treasury Stock | 0.709% | 0.20% |  | 0.11% |  |

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- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_iii&doctype=Standard -URIDate 2018-03-16 + Details
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