Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
2020-01-01 to 2020-12-31 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||
| Equity | — |
48,000,000
EUR
|
— |
6,368,000,000
EUR
|
1,711,000,000
EUR
|
1,441,000,000
EUR
|
— |
1,080,000,000
EUR
|
— |
4,000,000
EUR
|
5,023,000,000
EUR
|
— |
6,416,000,000
EUR
|
— | — | — |
38,000,000
EUR
|
916,000,000
EUR
|
1,702,000,000
EUR
|
6,805,000,000
EUR
|
195,000,000
EUR
|
852,000,000
EUR
|
5,010,000,000
EUR
|
6,610,000,000
EUR
|
— | — |
6,805,000,000
EUR
|
— | — | — | — | — | — |
27,000,000
EUR
|
529,000,000
EUR
|
1,699,000,000
EUR
|
5,008,000,000
EUR
|
6,553,000,000
EUR
|
301,000,000
EUR
|
6,451,000,000
EUR
|
101,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
33,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
370,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
525,000,000
EUR
|
— |
-
EUR
|
— | — | — |
39,000,000
EUR
|
— |
525,000,000
EUR
|
— | — |
-
EUR
|
— |
39,000,000
EUR
|
-
EUR
|
486,000,000
EUR
|
— | — | — | — | — | — | — | — |
3,000,000
EUR
|
25,000,000
EUR
|
— |
28,000,000
EUR
|
367,000,000
EUR
|
-
EUR
|
363,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Issue of equity |
271,000,000
EUR
|
— |
-
EUR
|
— | — | — |
249,000,000
EUR
|
— |
-
EUR
|
— | — |
9,000,000
EUR
|
— |
0
EUR
|
12,000,000
EUR
|
270,000,000
EUR
|
— | — | — | — | — | — | — | — |
199,000,000
EUR
|
18,000,000
EUR
|
— |
217,000,000
EUR
|
-
EUR
|
3,000,000
EUR
|
194,000,000
EUR
|
3,000,000
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
109,000,000
EUR
|
— |
-
EUR
|
— | — | — |
0
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
109,000,000
EUR
|
-
EUR
|
0
EUR
|
— | — | — | — | — | — | — | — |
0
EUR
|
41,000,000
EUR
|
— |
41,000,000
EUR
|
-
EUR
|
-
EUR
|
0
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
41,000,000
EUR
|
— |
34,000,000
EUR
|
— | — | — |
75,000,000
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
-
EUR
|
41,000,000
EUR
|
— | — | — | — | — | — | — | — |
31,000,000
EUR
|
-
EUR
|
— |
31,000,000
EUR
|
20,000,000
EUR
|
-
EUR
|
-
EUR
|
-
EUR
|
11,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
44,000,000
EUR
|
141,000,000
EUR
|
— |
97,000,000
EUR
|
0
EUR
|
0
EUR
|
44,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
62,000,000
EUR
|
— |
-
EUR
|
— | — | — |
62,000,000
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
-
EUR
|
62,000,000
EUR
|
— | — | — | — | — | — | — | — |
38,000,000
EUR
|
-
EUR
|
— |
38,000,000
EUR
|
-
EUR
|
-
EUR
|
38,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |