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Note 7 - Risk Management - Impairment Losses Reconciliations II (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Recovery of written-off assets |  | € (589) |  | € (558) |  | € (541) |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | Central Banks [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | 0 |  | 0 |  | 0 |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Transfers Between Allowances |  |  |  | 0 |  | 0 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | 0 |  | 0 |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | General Government [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | 0 |  | 0 |  | 0 |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Transfers Between Allowances |  |  |  | 0 |  | 0 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | 0 |  | 0 |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | Credit Institutions [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | 0 |  | (15) |  | (20) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (5) |  | 0 |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 4 |  | 0 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 5 |
Transfers Between Allowances |  |  |  | 16 |  | 0 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | 0 |  | (15) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | Other Financial Institutions [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (16) |  | (26) |  | (15) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (4) |  | (29) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2 |  | 3 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 26 |
Transfers Between Allowances |  |  |  | 0 |  | (10) |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 13 |  | (1) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (16) |  | (26) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | Corporate Entities [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (12) |  | (103) |  | 0 |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (17) |  | (138) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 3 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 33 |
Transfers Between Allowances |  |  |  | 107 |  | 0 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | (1) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (12) |  | (103) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Debt Securities [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (28) |  | (144) |  | (35) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (26) |  | (167) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 6 |  | 6 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 64 |
Transfers Between Allowances |  |  |  | 123 |  | (10) |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 13 |  | (2) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (28) |  | (144) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Central Banks [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | 0 |  | 0 |  | 0 |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Transfers Between Allowances |  |  |  | 0 |  | 0 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | 0 |  | 0 |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | General Government [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (42) |  | (39) |  | (37) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (70) |  | (2) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 37 |  | 20 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 14 |  | 6 |
Transfers Between Allowances |  |  |  | 1 |  | (27) |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 15 |  | 2 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (42) |  | (39) |
Recovery of written-off assets |  |  |  | 1 |  | 1 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Credit Institutions [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (6) |  | (7) |  | (17) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (2) |  | (2) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2 |  | 3 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 0 |  | 0 |
Transfers Between Allowances |  |  |  | 0 |  | 10 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1 |  | (3) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (6) |  | (7) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Other Financial Institutions [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (7) |  | (25) |  | (38) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (287) |  | (34) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 3 |  | 9 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 38 |  | 22 |
Transfers Between Allowances |  |  |  | 227 |  | 10 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 38 |  | 6 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (7) |  | (25) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Corporate Entities [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (5,599) |  | (7,402) |  | (9,225) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (3,627) |  | (3,705) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1,993 |  | 2,158 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 3,029 |  | 3,257 |
Transfers Between Allowances |  |  |  | (228) |  | (278) |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 636 |  | 391 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (5,599) |  | (7,402) |
Recovery of written-off assets |  |  |  | 345 |  | 335 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Households [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (3,022) |  | (3,319) |  | (3,514) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (3,472) |  | (3,002) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 837 |  | 511 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1,422 |  | 2,325 |
Transfers Between Allowances |  |  |  | 1,687 |  | 172 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | (177) |  | 189 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (3,022) |  | (3,319) |
Recovery of written-off assets |  |  |  | 212 |  | 205 |
Expected Credit Losses Individually and Collective Assessed [Member] | Loans and receivables [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (8,675) |  | (10,793) |  | (12,831) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (7,458) |  | (6,745) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2,872 |  | 2,702 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 4,503 |  | 5,610 |
Transfers Between Allowances |  |  |  | 1,687 |  | (113) |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 513 |  | 585 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (8,675) |  | (10,793) |
Recovery of written-off assets |  |  |  | 558 |  | 540 |
Expected Credit Losses Individually and Collective Assessed [Member] | Total [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (8,703) | [1] | (10,937) | [1],[2] | (12,866) | [2]
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (7,484) | [1] | (6,912) | [2]
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2,878 | [1] | 2,708 | [2]
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 4,503 | [1] | 5,673 | [2]
Transfers Between Allowances |  |  |  | 1,810 | [1] | (123) | [2]
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 526 | [1] | 583 | [2]
Allowance Account For Credit Losses Of Financial Assets at the end | [1] |  |  | (8,703) |  | (10,937) | [2]
Recovery of written-off assets |  |  |  | 558 | [1] | 540 | [2]
Collective Allowance Incurred But Not Recognized [Member] | Debt Securities [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (21) |  | (46) |  | (113) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (8) |  | (11) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 30 |  | 15 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1 |  | 1 |
Transfers Between Allowances |  |  |  | 0 |  | 64 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 3 |  | 0 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (21) |  | (46) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Collective Allowance Incurred But Not Recognized [Member] | Loans and receivables [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (21) |  | (5,224) |  | (5,911) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (1,776) |  | (1,546) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2,128 |  | 1,449 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1,536 |  | 87 |
Transfers Between Allowances |  |  |  | (1,328) |  | 711 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 554 |  | (15) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (21) |  | (5,224) |
Recovery of written-off assets |  |  |  | 0 |  | 0 |
Collective Allowance Incurred But Not Recognized [Member] | Total [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | (4,130) |  | (5,270) |  | (6,024) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (1,783) |  | (1,558) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 2,159 |  | 1,463 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1,537 |  | 88 |
Transfers Between Allowances |  |  |  | (1,328) |  | 775 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 557 |  | (15) |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (4,130) |  | (5,270) |
Recovery of written-off assets |  |  |  | 0 |  | 1 |
Total [Member] | Total [Member] | Total [Member] |  |  |  |  |  |  |
Reconciliation Of Changes In Allowance Account Fo rCredit Losses Of Financial Assets Line Items |  |  |  |  |  |  |
Allowance Account For Credit Losses Of Financial Assets at the beginning |  | € (12,833) |  | (16,206) |  | (18,890) |
Changes In Allowance Account For Credit Losses Of Financial Assets Abstract |  |  |  |  |  |  |
Additional Allowance Recognised In Profit Or Loss Allowance Account For Credit Losses Of Financial Assets |  |  |  | (9,267) |  | (8,470) |
Reversal Allowance Account For Credit Losses Of Financial Assets |  |  |  | 5,037 |  | 4,172 |
Utilisation Allowance Account For Credit Losses Of Financial Assets |  |  |  | 6,038 |  | 5,762 |
Transfers Between Allowances |  |  |  | 482 |  | 652 |
Increase Decrease Through Other Changes Allowance Account For Credit Losses Of Financial Assets |  |  |  | 1,083 |  | 568 |
Allowance Account For Credit Losses Of Financial Assets at the end |  |  |  | (12,833) |  | (16,206) |
Recovery of written-off assets |  |  |  | € 558 |  | € 541 |
[1] | (*) Figures originally report ed in the year 2017 in accordance to the applicable regulation, without restatements.
[2] | *) Figures originally reported in the year 2016 in accordance to the applicable regulation, without restatements.

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