Disclosure Of Fair Value Measurement [Text Block]
| Concept |
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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 assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | ||||||||||||||||||||||||||||||
| Assets | — | — | — |
13,081,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
12,387,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | ||||||||||||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | ||||||||||||||||||||||||||||||
| Liabilities | — | — | — |
7,348,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,949,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [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 |
189,000,000
EUR
|
453,000,000
EUR
|
2,227,000,000
EUR
|
5,733,000,000
EUR
|
1,175,000,000
EUR
|
5,670,000,000
EUR
|
1,636,000,000
EUR
|
63,000,000
EUR
|
351,000,000
EUR
|
719,000,000
EUR
|
86,000,000
EUR
|
72,000,000
EUR
|
5,366,000,000
EUR
|
719,000,000
EUR
|
76,000,000
EUR
|
710,000,000
EUR
|
2,583,000,000
EUR
|
1,636,000,000
EUR
|
5,438,000,000
EUR
|
1,300,000,000
EUR
|
6,173,000,000
EUR
|
83,000,000
EUR
|
2,519,000,000
EUR
|
207,000,000
EUR
|
6,256,000,000
EUR
|
1,636,000,000
EUR
|
296,000,000
EUR
|
90,000,000
EUR
|
719,000,000
EUR
|
1,300,000,000
EUR
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |