Statement Of Changes In Equity [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||
| Statement of changes in equity [line items] | ||||||||||||
| Increase (decrease) through transactions with owners, equity |
3,908,000,000
EUR
|
785,000,000
EUR
|
49,000,000
EUR
|
3,196,000,000
EUR
|
73,000,000
EUR
|
3,957,000,000
EUR
|
103,000,000
EUR
|
3,036,000,000
EUR
|
2,299,000,000
EUR
|
635,000,000
EUR
|
1,000,000
EUR
|
2,298,000,000
EUR
|
| Purchase of treasury shares |
1,993,000,000
EUR
|
1,982,000,000
EUR
|
— |
11,000,000
EUR
|
— |
1,993,000,000
EUR
|
— |
4,000,000
EUR
|
529,000,000
EUR
|
525,000,000
EUR
|
— |
529,000,000
EUR
|
| Cancellation of treasury shares | — |
1,197,000,000
EUR
|
— |
1,197,000,000
EUR
|
— | — | — |
1,160,000,000
EUR
|
— |
1,160,000,000
EUR
|
— | — |