Disclosure Of Fair Value Measurement [Text Block]
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 | — | — | — | — | — | — | — | — | — | — | — |
20,736,000,000
EUR
|
— | — | — | — | — |
21,824,000,000
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 |
984,000,000
EUR
|
129,000,000
EUR
|
59,000,000
EUR
|
10,202,000,000
EUR
|
5,000,000
EUR
|
730,000,000
EUR
|
97,000,000
EUR
|
—
EUR
|
768,000,000
EUR
|
9,907,000,000
EUR
|
36,000,000
EUR
|
10,331,000,000
EUR
|
6,443,000,000
EUR
|
2,978,000,000
EUR
|
74,000,000
EUR
|
262,000,000
EUR
|
6,139,000,000
EUR
|
9,421,000,000
EUR
|
569,000,000
EUR
|
41,000,000
EUR
|
257,000,000
EUR
|
50,000,000
EUR
|
69,000,000
EUR
|
1,000,000
EUR
|
359,000,000
EUR
|
7,447,000,000
EUR
|
2,843,000,000
EUR
|
7,883,000,000
EUR
|
—
EUR
|
10,726,000,000
EUR
|
266,000,000
EUR
|
13,000,000
EUR
|
65,000,000
EUR
|
1,000,000
EUR
|
688,000,000
EUR
|
158,000,000
EUR
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |