Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 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 |
2019-01-01 to 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 |
2019-01-01 to 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity | — |
561,000,000
EUR
|
3 652
EUR
|
— |
297,000,000
EUR
|
349,000,000
EUR
|
— |
3,000,000
EUR
|
— |
543,000,000
EUR
|
3 164
EUR
|
— |
4 213
EUR
|
— | — | — |
5 032
EUR
|
975,000,000
EUR
|
— | — |
6 007
EUR
|
543,000,000
EUR
|
— |
149,000,000
EUR
|
-
EUR
|
— | — |
4 341
EUR
|
297,000,000
EUR
|
— | — | — |
543,000,000
EUR
|
951,000,000
EUR
|
4 850
EUR
|
-
EUR
|
5 801
EUR
|
4 096
EUR
|
86,000,000
EUR
|
297,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
1 516
EUR
|
— | — |
-
EUR
|
— | — |
-
EUR
|
— |
1 169
EUR
|
— | — |
-
EUR
|
— |
347,000,000
EUR
|
-
EUR
|
1 169
EUR
|
— | — |
588,000,000
EUR
|
49,000,000
EUR
|
— | — |
637,000,000
EUR
|
— | — |
588,000,000
EUR
|
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
245,000,000
EUR
|
— | — |
-
EUR
|
— | — |
200,000,000
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
45,000,000
EUR
|
-
EUR
|
200,000,000
EUR
|
— | — |
63,000,000
EUR
|
22,000,000
EUR
|
— | — |
85,000,000
EUR
|
— | — |
-
EUR
|
63,000,000
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
1 761
EUR
|
— | — |
-
EUR
|
— | — |
200,000,000
EUR
|
— |
1 169
EUR
|
— | — |
-
EUR
|
— |
392,000,000
EUR
|
-
EUR
|
1 369
EUR
|
— | — |
525,000,000
EUR
|
27,000,000
EUR
|
— | — |
552,000,000
EUR
|
— | — |
588,000,000
EUR
|
63,000,000
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
32,000,000
EUR
|
— | — |
-
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
32,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — |
366,000,000
EUR
|
79,000,000
EUR
|
— | — |
445,000,000
EUR
|
— | — |
366,000,000
EUR
|
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
-
EUR
|
— | — |
-
EUR
|
— | — |
-
EUR
|
— |
11,000,000
EUR
|
— | — |
-
EUR
|
— |
11,000,000
EUR
|
-
EUR
|
11,000,000
EUR
|
— | — |
25,000,000
EUR
|
77,000,000
EUR
|
— | — |
102,000,000
EUR
|
— | — |
25,000,000
EUR
|
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
3,000,000
EUR
|
— | — |
3,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
-
EUR
|
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |