Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-01-01 |
As at 2020-12-31 |
As at 2020-01-01 |
As at 2019-12-31 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Investment property [abstract] | ||||||
| Investment property |
629,000,000
EUR
|
— |
603,000,000
EUR
|
— | — | — |
| Investments accounted for using equity method [abstract] | ||||||
| Investments in associates accounted for using equity method |
7,000,000
EUR
|
— |
13,000,000
EUR
|
— | — | — |
| Categories of financial assets [abstract] | ||||||
| Financial assets at fair value through profit or loss [abstract] | ||||||
| Financial assets at fair value through profit or loss |
180,000,000
EUR
|
— |
1 632
EUR
|
— | — | — |
| Financial assets available-for-sale |
20 124
EUR
|
— |
18 243
EUR
|
— | — | — |
| Loans and receivables |
10 322
EUR
|
— |
9 418
EUR
|
— | — | — |
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
2 083
EUR
|
1 804
EUR
|
1 804
EUR
|
1 435
EUR
|
1 435
EUR
|
1 175
EUR
|
| Miscellaneous assets [abstract] | ||||||
| Derivative financial assets | — | — | — | — | — | — |
| Derivative financial assets held for hedging |
262,000,000
EUR
|
— |
202,000,000
EUR
|
— | — | — |
| Other assets |
1 579
EUR
|
— |
1 546
EUR
|
— | — | — |
| Miscellaneous liabilities [abstract] | ||||||
| Derivative financial liabilities |
81,000,000
EUR
|
— |
85,000,000
EUR
|
— | — | — |
| Subordinated liabilities [abstract] | ||||||
| Subordinated liabilities |
2 581
EUR
|
— |
2 538
EUR
|
— | — | — |
| Investment contracts liabilities |
35 460
EUR
|
— |
30 162
EUR
|
— | — | — |
| Other liabilities |
5 907
EUR
|
— |
6 102
EUR
|
— | — | — |
| Issued capital [abstract] | ||||||
| Issued capital |
1 472
EUR
|
— |
1 471
EUR
|
— | — | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Revaluation surplus |
65,000,000
EUR
|
— |
315,000,000
EUR
|
— | — | — |
| Miscellaneous equity [abstract] | ||||||
| Reserve of share-based payments |
54,000,000
EUR
|
— |
58,000,000
EUR
|
— | — | — |
| Additional paid-in capital |
609,000,000
EUR
|
— |
609,000,000
EUR
|
— | — | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
51 518
EUR
|
— |
46 217
EUR
|
— | — | — |
| Assets less current liabilities [abstract] |