Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 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 |
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 |
2021-01-01 to 2021-12-31 |
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 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
5 790
EUR
|
1 498
EUR
|
— |
4 444
EUR
|
4 437
EUR
|
6,000,000
EUR
|
— |
2 962
EUR
|
111,000,000
EUR
|
— | — | — | — |
4 724
EUR
|
— |
10,000,000
EUR
|
1 476
EUR
|
6 861
EUR
|
110,000,000
EUR
|
— | — | — | — |
6 871
EUR
|
— | — |
550,000,000
EUR
|
7 075
EUR
|
12,000,000
EUR
|
1 441
EUR
|
7 087
EUR
|
2 126
EUR
|
3 399
EUR
|
109,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
3,000,000
EUR
|
— | — |
2 962
EUR
|
— | — | — | — | — | — |
-
EUR
|
2 962
EUR
|
— |
2 959
EUR
|
— |
553,000,000
EUR
|
— | — | — | — |
-
EUR
|
550,000,000
EUR
|
— | — | — |
3,000,000
EUR
|
550,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
0
EUR
|
— | — |
636,000,000
EUR
|
— | — | — | — | — | — |
636,000,000
EUR
|
— | — |
636,000,000
EUR
|
— |
815,000,000
EUR
|
— | — | — | — |
815,000,000
EUR
|
— | — | — | — |
0
EUR
|
815,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
3,000,000
EUR
|
— | — |
2 326
EUR
|
— | — | — | — | — | — |
636,000,000
EUR
|
2 962
EUR
|
— |
2 323
EUR
|
— |
262,000,000
EUR
|
— | — | — | — |
815,000,000
EUR
|
550,000,000
EUR
|
— | — | — |
3,000,000
EUR
|
265,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Issue of equity | — | — | — |
23,000,000
EUR
|
— | — | — |
1,000,000
EUR
|
— | — |
-
EUR
|
— |
22,000,000
EUR
|
23,000,000
EUR
|
— |
36,000,000
EUR
|
— | — | — | — |
-
EUR
|
— |
35,000,000
EUR
|
1,000,000
EUR
|
— | — |
36,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
3,000,000
EUR
|
— | — |
98,000,000
EUR
|
— | — | — | — | — | — |
98,000,000
EUR
|
— | — |
101,000,000
EUR
|
— |
4,000,000
EUR
|
— | — | — | — |
-
EUR
|
— | — | — | — |
4,000,000
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
4,000,000
EUR
|
— | — |
4,000,000
EUR
|
— | — | — | — | — | — |
4,000,000
EUR
|
— | — |
1,000,000
EUR
|
— |
4,000,000
EUR
|
— | — | — | — |
3,000,000
EUR
|
— | — | — | — |
1,000,000
EUR
|
3,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — |
58,000,000
EUR
|
— | — | — | — | — | — |
58,000,000
EUR
|
— | — |
58,000,000
EUR
|
— |
64,000,000
EUR
|
— | — | — | — |
64,000,000
EUR
|
— | — | — | — | — |
64,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
32,000,000
EUR
|
— | — | — | — | — | — |
32,000,000
EUR
|
— | — |
32,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |