Disclosure Of Fair Value Measurement [Text Block]
| Concept |
As at 2021-12-31 |
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As at 2020-12-31 |
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As at 2019-12-31 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 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 |
EUR
|
4,422,000,000
EUR
|
68,000,000
EUR
|
5,272,000,000
EUR
|
5,000,000
EUR
|
4,538,000,000
EUR
|
734,000,000
EUR
|
149,000,000
EUR
|
192,000,000
EUR
|
3,635,000,000
EUR
|
647,000,000
EUR
|
7,000,000
EUR
|
67,000,000
EUR
|
3,706,000,000
EUR
|
192,000,000
EUR
|
EUR
|
181,000,000
EUR
|
4,353,000,000
EUR
|
3,292,000,000
EUR
|
66,000,000
EUR
|
533,000,000
EUR
|
129,000,000
EUR
|
3,825,000,000
EUR
|
3,197,000,000
EUR
|
41,000,000
EUR
|
7,000,000
EUR
|
192,000,000
EUR
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |