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Note 25 - Post-employment and other employee benefit commitments. Sensitivity Analysis (Details) - EUR (€) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Sensitivity Analysis Line Items |  |  |
Other long term employee benefits | € 49,000,000 | € 61,000,000 | € 62,000,000
Discount Rate [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Increase | (354,000,000) | (367,000,000) | (298,000,000)
Increase in Defined Benefit | 390,000,000 | 405,000,000 | 332,000,000
rate of salary increasy [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Increase | 4,000,000 | 3,000,000 | 3,000,000
Increase in Defined Benefit | (4,000,000) | (3,000,000) | (3,000,000)
rate of pension increase [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Increase | 29,000,000 | 27,000,000 | 19,000,000
Increase in Defined Benefit | (27,000,000) | (26,000,000) | (18,000,000)
medical cost trend rate [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Increase | 145,000,000 | 169,000,000 | 115,000,000
Increase in Defined Benefit | (129,000,000) | (133,000,000) | (91,000,000)
change in obligation from each additional year of longevity [Member] |  |  |
Sensitivity Analysis Line Items |  |  |
Increase | 211,000,000 | 137,000,000 | 108,000,000
Increase in Defined Benefit | € 0 | € 0 | € 0

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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from other long term benefit program with employees. + References No definition available. + Details
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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 2020-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_145_a&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_145_a&doctype=Standard -URIDate 2020-01-01 + Details
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