Disclosure Of Fair Value Measurement [Text Block]
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — |
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| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets | — | — | — | — | — | — | — | — | — | — |
23,710,000,000
EUR
|
— | — | — |
23,141,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
1,976,000,000
EUR
|
9,588,000,000
EUR
|
5,000,000
EUR
|
53,000,000
EUR
|
904,000,000
EUR
|
—
EUR
|
11,088,000,000
EUR
|
— |
43,000,000
EUR
|
75,000,000
EUR
|
11,141,000,000
EUR
|
556,000,000
EUR
|
305,000,000
EUR
|
254,000,000
EUR
|
11,115,000,000
EUR
|
1,858,000,000
EUR
|
91,000,000
EUR
|
466,000,000
EUR
|
254,000,000
EUR
|
38,000,000
EUR
|
10,000,000
EUR
|
80,000,000
EUR
|
9,585,000,000
EUR
|
5,000,000
EUR
|
730,000,000
EUR
|
38,000,000
EUR
|
11,035,000,000
EUR
|
10,000,000
EUR
|
91,000,000
EUR
|
50,000,000
EUR
|
1,908,000,000
EUR
|
730,000,000
EUR
|
5,000,000
EUR
|
92,000,000
EUR
|
12,000,000
EUR
|
50,000,000
EUR
|
11,085,000,000
EUR
|
62,000,000
EUR
|
11,177,000,000
EUR
|
466,000,000
EUR
|
9,585,000,000
EUR
|
11,132,000,000
EUR
|
276,000,000
EUR
|
276,000,000
EUR
|
380,000,000
EUR
|
21,000,000
EUR
|
2,000,000
EUR
|
67,000,000
EUR
|
380,000,000
EUR
|
2,000,000
EUR
|
2,000,000
EUR
|
—
EUR
|
11,130,000,000
EUR
|
9,997,000,000
EUR
|
80,000,000
EUR
|
1,834,000,000
EUR
|
471,000,000
EUR
|
5,000,000
EUR
|
635,000,000
EUR
|
11,052,000,000
EUR
|
67,000,000
EUR
|
471,000,000
EUR
|
9,997,000,000
EUR
|
5,000,000
EUR
|
1,832,000,000
EUR
|
80,000,000
EUR
|
21,000,000
EUR
|
635,000,000
EUR
|
11,050,000,000
EUR
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |