Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||
| Statement of changes in equity [line items] | ||||||
| Purchase of treasury shares | — |
2,211,000,000
EUR
|
— | — |
2,211,000,000
EUR
|
2,211,000,000
EUR
|
| Sale or issue of treasury shares | — |
72,000,000
EUR
|
— |
72,000,000
EUR
|
— | — |
| Cancellation of treasury shares |
434,000,000
EUR
|
488,000,000
EUR
|
54,000,000
EUR
|
— | — | — |