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 | — | — | — | — | — | — | — | — | — | — |
53,475,000,000
EUR
|
54,758,000,000
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 |
998,000,000
EUR
|
31,000,000
EUR
|
9,310,000,000
EUR
|
1,257,000,000
EUR
|
461,000,000
EUR
|
2,168,000,000
EUR
|
— |
5,000,000
EUR
|
390,000,000
EUR
|
52,000,000
EUR
|
22,104,000,000
EUR
|
22,394,000,000
EUR
|
34,000,000
EUR
|
9,248,000,000
EUR
|
1,257,000,000
EUR
|
461,000,000
EUR
|
1,866,000,000
EUR
|
9,733,000,000
EUR
|
9,928,000,000
EUR
|
6,000,000
EUR
|
2,733,000,000
EUR
|
390,000,000
EUR
|
4,000,000
EUR
|
999,000,000
EUR
|
623,000,000
EUR
|
21,920,000,000
EUR
|
36,000,000
EUR
|
20,000,000
EUR
|
22,000,000
EUR
|
40,000,000
EUR
|
36,000,000
EUR
|
—
EUR
|
9,877,000,000
EUR
|
5,000,000
EUR
|
20,000,000
EUR
|
20,000,000
EUR
|
2,369,000,000
EUR
|
1,257,000,000
EUR
|
9,166,000,000
EUR
|
9,857,000,000
EUR
|
461,000,000
EUR
|
1,822,000,000
EUR
|
2,369,000,000
EUR
|
9,694,000,000
EUR
|
21,960,000,000
EUR
|
5,000,000
EUR
|
—
EUR
|
461,000,000
EUR
|
1,257,000,000
EUR
|
9,186,000,000
EUR
|
623,000,000
EUR
|
22,000,000
EUR
|
1,822,000,000
EUR
|
9,714,000,000
EUR
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |