Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 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 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 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 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
1,383,000,000
EUR
|
— | — |
11,161,000,000
EUR
|
— | — |
25,000,000
EUR
|
379,000,000
EUR
|
— | — | — |
280,000,000
EUR
|
11,023,000,000
EUR
|
9,975,000,000
EUR
|
39,000,000
EUR
|
684,000,000
EUR
|
5,000,000
EUR
|
138,000,000
EUR
|
— | — | — |
984,000,000
EUR
|
129,000,000
EUR
|
59,000,000
EUR
|
— |
10,202,000,000
EUR
|
5,000,000
EUR
|
— |
730,000,000
EUR
|
— | — |
97,000,000
EUR
|
— |
768,000,000
EUR
|
9,907,000,000
EUR
|
36,000,000
EUR
|
10,331,000,000
EUR
|
— | — | — | — |
6,443,000,000
EUR
|
2,978,000,000
EUR
|
78,000,000
EUR
|
262,000,000
EUR
|
9,421,000,000
EUR
|
6,035,000,000
EUR
|
597,000,000
EUR
|
53,000,000
EUR
|
243,000,000
EUR
|
59,000,000
EUR
|
1,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
3,000,000
EUR
|
— | — |
765,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
762,000,000
EUR
|
765,000,000
EUR
|
367,000,000
EUR
|
— | — | — | — | — | — |
308,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
59,000,000
EUR
|
— |
308,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
356,000,000
EUR
|
— |
428,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
2,000,000
EUR
|
— |
84,000,000
EUR
|
1,116,000,000
EUR
|
— |
351,000,000
EUR
|
— | — | — | — |
183,000,000
EUR
|
84,000,000
EUR
|
— | — | — | — | — | — | — |
1,118,000,000
EUR
|
765,000,000
EUR
|
61,000,000
EUR
|
— | — | — |
39,000,000
EUR
|
— | — |
308,000,000
EUR
|
— |
377,000,000
EUR
|
— | — |
17,000,000
EUR
|
— | — | — | — |
355,000,000
EUR
|
8,000,000
EUR
|
— |
69,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — |
68,000,000
EUR
|
— | — |
68,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — |
68,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
1,000,000
EUR
|
— | — |
351,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
352,000,000
EUR
|
351,000,000
EUR
|
89,000,000
EUR
|
— | — | — | — | — | — |
1,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
78,000,000
EUR
|
10,000,000
EUR
|
11,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
300,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
300,000,000
EUR
|
300,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
—
EUR
|
— | — | — |
58,000,000
EUR
|
— | — |
100,000,000
EUR
|
— |
110,000,000
EUR
|
10,000,000
EUR
|
— |
17,000,000
EUR
|
— | — | — | — |
151,000,000
EUR
|
2,760,000,000
EUR
|
2,760,000,000
EUR
|
2,760,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
2,000,000
EUR
|
— | — | — | — | — |
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
2,000,000
EUR
|
1,000,000
EUR
|
54,000,000
EUR
|
— | — | — | — | — | — |
27,000,000
EUR
|
— | — |
12,000,000
EUR
|
— | — | — | — | — | — | — |
3,000,000
EUR
|
36,000,000
EUR
|
51,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |