Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||
| Increase (decrease) through change in equity of subsidiaries, equity |
72,000,000
EUR
|
— |
404,000,000
EUR
|
333,000,000
EUR
|
72,000,000
EUR
|
0
EUR
|
93,000,000
EUR
|
93,000,000
EUR
|
0
EUR
|
— |
94,000,000
EUR
|
0
EUR
|
1,000,000
EUR
|
0
EUR
|
| Purchase of treasury shares | — |
360,000,000
EUR
|
360,000,000
EUR
|
— |
360,000,000
EUR
|
0
EUR
|
— |
431,000,000
EUR
|
— |
431,000,000
EUR
|
431,000,000
EUR
|
0
EUR
|
— | — |
| Sale or issue of treasury shares |
2,000,000
EUR
|
373,000,000
EUR
|
375,000,000
EUR
|
— |
375,000,000
EUR
|
0
EUR
|
2,000,000
EUR
|
437,000,000
EUR
|
— |
439,000,000
EUR
|
437,000,000
EUR
|
0
EUR
|
— | — |