Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Investment property [abstract] | |||
| Investment property |
684,000,000
EUR
|
700,000,000
EUR
|
629,000,000
EUR
|
| Investments accounted for using equity method [abstract] | |||
| Investments in associates accounted for using equity method |
4,000,000
EUR
|
9,000,000
EUR
|
7,000,000
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 |
1 444
EUR
|
1 267
EUR
|
1 214
EUR
|
| Financial assets at fair value through other comprehensive income [abstract] | |||
| Financial assets measured at fair value through other comprehensive income |
19 259
EUR
|
18 713
EUR
|
19 531
EUR
|
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
1 854
EUR
|
1 830
EUR
|
2 083
EUR
|
| Miscellaneous assets [abstract] | |||
| Derivative financial assets | — | — | — |
| Derivative financial assets held for hedging |
180,000,000
EUR
|
272,000,000
EUR
|
262,000,000
EUR
|
| Miscellaneous liabilities [abstract] | |||
| Derivative financial liabilities |
54,000,000
EUR
|
39,000,000
EUR
|
81,000,000
EUR
|
| Subordinated liabilities [abstract] | |||
| Subordinated liabilities |
2 613
EUR
|
2 635
EUR
|
2 581
EUR
|
| Other liabilities |
710,000,000
EUR
|
752,000,000
EUR
|
586,000,000
EUR
|
| Issued capital [abstract] | |||
| Issued capital |
1 416
EUR
|
1 415
EUR
|
1 472
EUR
|
| Retained earnings [abstract] | |||
| Retained earnings, profit (loss) for reporting period |
812,000,000
EUR
|
1 383
EUR
|
456,000,000
EUR
|
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
40,000,000
EUR
|
33,000,000
EUR
|
54,000,000
EUR
|
| Additional paid-in capital |
464,000,000
EUR
|
463,000,000
EUR
|
609,000,000
EUR
|
| Net assets (liabilities) [abstract] | |||
| Assets |
35 477
EUR
|
34 987
EUR
|
33 235
EUR
|
| Assets less current liabilities [abstract] |