Analysis Of Income And Expense [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||||||||||
| Material income and expense [abstract] | ||||||||||||||||||
| Interest income (expense) | — | — | — | — | — | — | — | — |
5,210,000,000
EUR
|
5,863,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Other operating income (expense) | — | — | — | — | — | — | — | — |
663,000,000
EUR
|
314,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Selling, general and administrative expense [abstract] | ||||||||||||||||||
| General and administrative expense | — | — | — | — | — | — | — | — |
3,287,000,000
EUR
|
2,677,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Revenue and other operating income | — | — | — | — | — | — | — | — |
7,597,000,000
EUR
|
7,916,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Operating expense | — | — | — | — | — | — | — | — |
5,806,000,000
EUR
|
5,256,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Fee and commission income (expense) [abstract] | ||||||||||||||||||
| Fee and commission income [abstract] | ||||||||||||||||||
| Fee and commission income | — | — | — | — | — | — | — | — |
2,213,000,000
EUR
|
2,253,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Fee and commission expense [abstract] | ||||||||||||||||||
| Fee and commission expense | — | — | — | — | — | — | — | — |
550,000,000
EUR
|
695,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Fee and commission income (expense) | — | — | — | — | — | — | — | — |
1,664,000,000
EUR
|
1,558,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Trading income (expense) [abstract] | ||||||||||||||||||
| Trading income (expense) | — | — | — | — | — | — | — | — |
145,000,000
EUR
|
163,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Expenses by nature [abstract] | ||||||||||||||||||
| Classes of employee benefits expense [abstract] | ||||||||||||||||||
| Employee benefits expense | — | — | — | — | — | — | — | — |
2,324,000,000
EUR
|
2,280,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Other expenses, by nature | — | — | — | — | — | — | — | — |
142,000,000
EUR
|
148,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Miscellaneous other comprehensive income [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations and hedges of net investments in foreign operations [abstract] | ||||||||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | — | — | — | — | — | — |
66,000,000
EUR
|
109,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||||||||||||||||||
| Share of profit (loss) of associates and joint ventures accounted for using equity method | — | — | — | — | — | — | — | — |
23,000,000
EUR
|
29,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax [abstract] | ||||||||||||||||||
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, before tax | — | — | — | — | — | — | — | — |
16,000,000
EUR
|
4,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income [abstract] | ||||||||||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — | — | — | — | — | — | — |
11,000,000
EUR
|
3,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss | — | — | — | — | — | — | — | — |
112,000,000
EUR
|
161,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Income tax relating to components of other comprehensive income | — |
123,000,000
EUR
|
— |
30,000,000
EUR
|
82,000,000
EUR
|
5,000,000
EUR
|
6,000,000
EUR
|
— | — | — |
1,000,000
EUR
|
— |
1,000,000
EUR
|
165,000,000
EUR
|
158,000,000
EUR
|
3,000,000
EUR
|
— |
3,000,000
EUR
|
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income |
3,000,000
EUR
|
506,000,000
EUR
|
1,231,000,000
EUR
|
— | — | — | — |
1,737,000,000
EUR
|
1,740,000,000
EUR
|
359,000,000
EUR
|
— |
359,000,000
EUR
|
— | — |
314,000,000
EUR
|
— |
45,000,000
EUR
|
— |
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — | — | — | — |
1,737,000,000
EUR
|
359,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||||||||||||||||||
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — | — | — | — |
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — |