Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 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 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
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
|
— |
—
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
|
74,000,000
EUR
|
262,000,000
EUR
|
— | — |
9,421,000,000
EUR
|
6,139,000,000
EUR
|
569,000,000
EUR
|
— |
41,000,000
EUR
|
257,000,000
EUR
|
50,000,000
EUR
|
69,000,000
EUR
|
— | — | — |
1,000,000
EUR
|
— | — |
359,000,000
EUR
|
7,447,000,000
EUR
|
7,883,000,000
EUR
|
2,843,000,000
EUR
|
—
EUR
|
10,726,000,000
EUR
|
266,000,000
EUR
|
13,000,000
EUR
|
65,000,000
EUR
|
1,000,000
EUR
|
688,000,000
EUR
|
158,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
367,000,000
EUR
|
— | — | — | — | — | — |
308,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
59,000,000
EUR
|
— |
308,000,000
EUR
|
— | — | — |
424,000,000
EUR
|
— | — | — |
424,000,000
EUR
|
161,000,000
EUR
|
— | — | — |
585,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
428,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
14,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
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
|
84,000,000
EUR
|
— |
97,000,000
EUR
|
433,000,000
EUR
|
— | — | — |
424,000,000
EUR
|
166,000,000
EUR
|
— | — | — |
599,000,000
EUR
|
— | — | — | — |
9,000,000
EUR
|
— |
4,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
89,000,000
EUR
|
— | — | — | — | — | — |
1,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
78,000,000
EUR
|
10,000,000
EUR
|
11,000,000
EUR
|
— | — | — |
552,000,000
EUR
|
— | — | — |
552,000,000
EUR
|
66,000,000
EUR
|
— | — | — |
618,000,000
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
|
— | — | — |
21,000,000
EUR
|
— | — | — |
14,000,000
EUR
|
1,000,000
EUR
|
— | — | — |
20,000,000
EUR
|
— | — | — | — | — |
5,000,000
EUR
|
— | — |
9,000,000
EUR
|
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
54,000,000
EUR
|
— | — | — | — | — | — |
27,000,000
EUR
|
— | — |
12,000,000
EUR
|
— | — | — | — | — | — | — | — |
3,000,000
EUR
|
36,000,000
EUR
|
51,000,000
EUR
|
— | — | — |
7,000,000
EUR
|
— | — | — |
5,000,000
EUR
|
3,000,000
EUR
|
— | — | — |
10,000,000
EUR
|
— | — | — | — | — |
2,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |