Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Increase (decrease) through transfer between revaluation surplus and retained earnings, equity |
EUR
|
EUR
|
-
EUR
|
1,000,000
EUR
|
EUR
|
EUR
|
1,000,000
EUR
|
-
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
-
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
-
EUR
|
-
EUR
|
-
EUR
|
EUR
|
2,000,000
EUR
|
2,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
-
EUR
|
| Increase (decrease) through exercise of options, equity |
12,000,000
EUR
|
EUR
|
6,000,000
EUR
|
5,000,000
EUR
|
EUR
|
EUR
|
EUR
|
6,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
21,000,000
EUR
|
9,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
9,000,000
EUR
|
12,000,000
EUR
|
31,000,000
EUR
|
55,000,000
EUR
|
24,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
31,000,000
EUR
|
| Decrease (increase) through tax on share-based payment transactions, equity |
EUR
|
EUR
|
1,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
1,000,000
EUR
|
1,000,000
EUR
|
EUR
|
EUR
|
EUR
|
— |
4,000,000
EUR
|
4,000,000
EUR
|
EUR
|
EUR
|
EUR
|
4,000,000
EUR
|
EUR
|
4,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
4,000,000
EUR
|
4,000,000
EUR
|
| Purchase of treasury shares |
24,000,000
EUR
|
EUR
|
24,000,000
EUR
|
-
EUR
|
EUR
|
EUR
|
EUR
|
24,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
758,000,000
EUR
|
757,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
757,000,000
EUR
|
-
EUR
|
130,000,000
EUR
|
130,000,000
EUR
|
-
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
130,000,000
EUR
|
| Sale or issue of treasury shares |
77,000,000
EUR
|
EUR
|
7,000,000
EUR
|
28,000,000
EUR
|
EUR
|
EUR
|
EUR
|
7,000,000
EUR
|
43,000,000
EUR
|
EUR
|
EUR
|
EUR
|
143,000,000
EUR
|
11,000,000
EUR
|
150,000,000
EUR
|
EUR
|
EUR
|
EUR
|
11,000,000
EUR
|
18,000,000
EUR
|
23,000,000
EUR
|
161,000,000
EUR
|
7,000,000
EUR
|
EUR
|
EUR
|
-
EUR
|
EUR
|
EUR
|
146,000,000
EUR
|
23,000,000
EUR
|
| Cancellation of treasury shares |
299,000,000
EUR
|
2,000,000
EUR
|
EUR
|
298,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
1,228,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|
7,000,000
EUR
|
EUR
|
1,221,000,000
EUR
|
EUR
|
152,000,000
EUR
|
151,000,000
EUR
|
EUR
|
EUR
|
1,000,000
EUR
|
EUR
|
EUR
|
EUR
|
EUR
|