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 |
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 |
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 |
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 2020-12-31 |
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 |
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 |
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 | — |
204,000,000
EUR
|
16 244
EUR
|
— | — |
16,000,000
EUR
|
— | — |
4 544
EUR
|
21 126
EUR
|
— |
20 715
EUR
|
411,000,000
EUR
|
— |
1 949
EUR
|
2 096
EUR
|
— | — | — |
13 687
EUR
|
311,000,000
EUR
|
— |
17 892
EUR
|
— | — | — |
48,000,000
EUR
|
5 104
EUR
|
2 131
EUR
|
125,000,000
EUR
|
2 857
EUR
|
— |
18 203
EUR
|
— | — | — |
19 416
EUR
|
364,000,000
EUR
|
19 780
EUR
|
1 467
EUR
|
5 551
EUR
|
12 518
EUR
|
108,000,000
EUR
|
743,000,000
EUR
|
2 179
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
93,000,000
EUR
|
— | — | — | — | — |
2 521
EUR
|
— | — | — | — | — | — | — | — | — |
2 614
EUR
|
2 521
EUR
|
489,000,000
EUR
|
— | — | — | — | — | — |
456,000,000
EUR
|
— | — | — | — | — | — | — | — |
33,000,000
EUR
|
456,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
2,000,000
EUR
|
— | — |
0
EUR
|
32,000,000
EUR
|
— |
1 618
EUR
|
0
EUR
|
— | — |
908,000,000
EUR
|
— | — |
0
EUR
|
— | — |
1 620
EUR
|
678,000,000
EUR
|
1 555
EUR
|
— | — |
0
EUR
|
— |
0
EUR
|
160,000,000
EUR
|
47,000,000
EUR
|
— | — | — | — | — |
0
EUR
|
— |
1 390
EUR
|
52,000,000
EUR
|
1 503
EUR
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
95,000,000
EUR
|
— | — |
0
EUR
|
32,000,000
EUR
|
— |
4 139
EUR
|
0
EUR
|
— | — |
908,000,000
EUR
|
— | — |
0
EUR
|
— | — |
4 234
EUR
|
3 199
EUR
|
1 066
EUR
|
— | — |
0
EUR
|
— |
0
EUR
|
160,000,000
EUR
|
503,000,000
EUR
|
— | — | — | — | — |
0
EUR
|
— |
1 390
EUR
|
19,000,000
EUR
|
1 047
EUR
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
31,000,000
EUR
|
— | — | — | — | — |
698,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
729,000,000
EUR
|
698,000,000
EUR
|
44,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
44,000,000
EUR
|
0
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity |
13,000,000
EUR
|
— | — | — | — | — |
0
EUR
|
— | — | — | — | — | — | — | — | — |
13,000,000
EUR
|
— |
10,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10,000,000
EUR
|
0
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — |
873,000,000
EUR
|
— | — |
854,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
854,000,000
EUR
|
19,000,000
EUR
|
658,000,000
EUR
|
— | — |
651,000,000
EUR
|
— | — | — |
7,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
658,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
23,000,000
EUR
|
— | — | — | — | — |
21,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
2,000,000
EUR
|
21,000,000
EUR
|
10,000,000
EUR
|
— | — | — | — | — | — |
10,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
10,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — |
58,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
58,000,000
EUR
|
58,000,000
EUR
|
32,000,000
EUR
|
— | — | — | — | — | — |
32,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
32,000,000
EUR
|
— | — | — | — | — | — | — | — | — |