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Note 32 - Interest Income and Expense - Interest Income And Expenses Change In The Balance (Details) - EUR (€) € in Millions | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash And Balances With Central Banks And Other Demand Deposits [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | € 1 | [1] | € 2 | [2]
Interest Income Expense Price Effect | 48 | [3] | (1) | [4]
Interest Income Expense Total Effect | 49 |  | 1 |
Securities Portfolio And Derivatives [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | 150 | [1] | (306) | [2]
Interest Income Expense Price Effect | (339) | [3] | 185 | [4]
Interest Income Expense Total Effect | (189) |  | (120) |
Loans And Advances To Central Banks [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (68) | [1] | (28) | [2]
Interest Income Expense Price Effect | 41 | [3] | 77 | [4]
Interest Income Expense Total Effect | (27) |  | 50 |
Loans And Advances To Credit Institutions [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (73) | [1] | (11) | [2]
Interest Income Expense Price Effect | 256 | [3] | (7) | [4]
Interest Income Expense Total Effect | 183 |  | (19) |
Loans And Advances To Customer [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (757) | [1] | (15) | [2]
Interest Income Expense Price Effect | 1,054 | [3] | 572 | [4]
Interest Income Expense Total Effect | 297 |  | 557 |
Loans And Advances To Customers Euros [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (127) | [1] | (64) | [2]
Interest Income Expense Price Effect | 89 | [3] | (140) | [4]
Interest Income Expense Total Effect | (38) |  | (204) |
Loans And Advances To Customers Foreign Currency [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (581) | [1] | 263 | [2]
Interest Income Expense Price Effect | 916 | [3] | 498 | [4]
Interest Income Expense Total Effect | 335 |  | 761 |
Other Assets [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (23) | [1] | (6) | [2]
Interest Income Expense Price Effect | (88) | [3] | 140 | [4]
Interest Income Expense Total Effect | (111) |  | 134 |
Interest Income Member [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Total Effect | 202 |  | 603 |
Deposits From Central Banks And Credit Institutions [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (262) | [5] | (87) | [6]
Interest Income Expense Price Effect | 464 | [7] | 73 | [8]
Interest Income Expense Total Effect | 202 |  | (14) |
Customer Depositis [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (188) | [5] | (68) | [6]
Interest Income Expense Price Effect | 693 | [7] | 65 | [8]
Interest Income Expense Total Effect | 505 |  | (3) |
Customers Deposits Euros [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (13) | [5] | (36) | [6]
Interest Income Expense Price Effect | (65) | [7] | (139) | [8]
Interest Income Expense Total Effect | (78) |  | (175) |
Customers Deposits Foreign Currency [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (199) | [5] | 109 | [6]
Interest Income Expense Price Effect | 782 | [7] | 63 | [8]
Interest Income Expense Total Effect | 583 |  | 172 |
Debt Securities Issued [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | (80) | [5] | (39) | [6]
Interest Income Expense Price Effect | 77 | [7] | 28 | [8]
Interest Income Expense Total Effect | (4) |  | (11) |
Other liabilities [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Volume Effect | 217 | [5] | (23) | [6]
Interest Income Expense Price Effect | (559) | [7] | 215 | [8]
Interest Income Expense Total Effect | (341) |  | 192 |
Interest Expenses |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Total Effect | 362 |  | 164 |
Total [Member] |  |  |  |
Interest Income Expemse Change Balance Line Items |  |  |  |
Interest Income Expense Total Effect | € (160) |  | € 438 |
[1] | (1) The volume effect is calculated as the result of the interest rate of the initial period multiplied by the difference between the average balances of both periods.
[2] | (1) The volume effect is calculated as the result of the interest rate of the initial period multiplied by the difference between the average balances of both periods.
[3] | (2) The price effect is calculated as the result of the average balance of the last period multiplied by the difference between the interest rates of both periods.
[4] | (2) The price effect is calculated as the result of the average balance of the last period multiplied by the difference between the interest rates of both periods.
[5] | (1) The volume effect is calculated as the result of the interest rate of the initial period multiplied by the difference between the average balances of both periods.
[6] | (1) The volume effect is calculated as the result of the interest rate of the initial period multiplied by the difference between the average balances of both periods.
[7] | (2) The price effect is calculated as the result of the average balance of the last period multiplied by the difference between the interest rates of both periods.
[8] | (2) The price effect is calculated as the result of the average balance of the last period multiplied by the difference between the interest rates of both periods.

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