Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 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 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||
| Equity | — |
1,261,000,000
EUR
|
7,761,000,000
EUR
|
3,739,000,000
EUR
|
— | — | — |
1 204,1
EUR
|
909,000,000
EUR
|
1 197,8
EUR
|
63,000,000
EUR
|
830,000,000
EUR
|
— | — | — |
7,615,000,000
EUR
|
15,000,000
EUR
|
— |
830,000,000
EUR
|
1 182,7
EUR
|
— |
909,000,000
EUR
|
1,284,000,000
EUR
|
3,757,000,000
EUR
|
— |
1 184,2
EUR
|
— | — |
1 149,6
EUR
|
7,000,000
EUR
|
3,708,000,000
EUR
|
1 150,3
EUR
|
7,370,000,000
EUR
|
1,322,000,000
EUR
|
909,000,000
EUR
|
830,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||
| Profit (loss) |
2,000,000
EUR
|
— | — | — | — | — |
3,436,000,000
EUR
|
— | — | — | — | — |
3,435,000,000
EUR
|
3,436,000,000
EUR
|
3,281,000,000
EUR
|
— | — | — | — | — |
3,280,000,000
EUR
|
— | — | — | — | — |
1,000,000
EUR
|
3,280,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
1,000,000
EUR
|
— | — | — | — |
19,000,000
EUR
|
31,000,000
EUR
|
— | — | — | — | — |
30,000,000
EUR
|
12,000,000
EUR
|
80,000,000
EUR
|
— | — | — | — | — |
32,000,000
EUR
|
— | — | — |
49,000,000
EUR
|
— |
1,000,000
EUR
|
81,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
1,000,000
EUR
|
— | — | — | — |
19,000,000
EUR
|
3,406,000,000
EUR
|
— | — | — | — | — |
3,404,000,000
EUR
|
3,424,000,000
EUR
|
3,361,000,000
EUR
|
— | — | — | — | — |
3,312,000,000
EUR
|
— | — | — |
49,000,000
EUR
|
— |
0
EUR
|
3,361,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
1,000,000
EUR
|
— | — | — | — | — |
3,124,000,000
EUR
|
— | — | — | — | — |
3,125,000,000
EUR
|
3,124,000,000
EUR
|
2,962,000,000
EUR
|
— | — | — | — | — |
2,962,000,000
EUR
|
— | — | — | — | — |
1,000,000
EUR
|
2,962,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — |
155,000,000
EUR
|
— | — | — | — | — |
155,000,000
EUR
|
155,000,000
EUR
|
106,000,000
EUR
|
— | — | — | — | — |
106,000,000
EUR
|
— | — | — | — | — | — |
106,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
EUR
|
— | — | — | — | — |
0
EUR
|
— | — | — | — | — |
1,000,000
EUR
|
0
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — |
23,000,000
EUR
|
— |
23,000,000
EUR
|
— | — | — | — | — |
23,000,000
EUR
|
— |
38,000,000
EUR
|
— | — |
38,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
38,000,000
EUR
|
— | — | — | — | — | — | — | — |