Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 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 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||
| Equity | — |
7,592,000,000
EUR
|
— |
5,924,000,000
EUR
|
— |
226,000,000
EUR
|
— |
108,000,000
EUR
|
94,000,000
EUR
|
1,456,000,000
EUR
|
6,478,000,000
EUR
|
— | — | — | — |
276,000,000
EUR
|
64,000,000
EUR
|
4,716,000,000
EUR
|
94,000,000
EUR
|
1,456,000,000
EUR
|
4,021,000,000
EUR
|
166,000,000
EUR
|
1,437,000,000
EUR
|
5,686,000,000
EUR
|
31,000,000
EUR
|
94,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||
| Profit (loss) |
1,730,000,000
EUR
|
— | — | — |
42,000,000
EUR
|
— |
1,773,000,000
EUR
|
— | — | — | — | — |
1,147,000,000
EUR
|
1,196,000,000
EUR
|
49,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
30,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
109,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
1,700,000,000
EUR
|
— |
50,000,000
EUR
|
— |
42,000,000
EUR
|
— |
1,792,000,000
EUR
|
— | — | — | — |
110,000,000
EUR
|
1,256,000,000
EUR
|
1,196,000,000
EUR
|
49,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
2,000,000
EUR
|
— | — | — |
2,000,000
EUR
|
— | — | — | — | — | — | — |
16,000,000
EUR
|
— |
16,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
3,000,000
EUR
|
— | — | — | — | — |
3,000,000
EUR
|
— | — | — | — | — |
3,000,000
EUR
|
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — |