Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 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 |
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 |
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 |
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 | — |
4 934,8
EUR
|
— |
8 764,7
EUR
|
— |
48,000,000
EUR
|
— |
8 732,1
EUR
|
3 378,4
EUR
|
— |
3,379,000,000
EUR
|
858,000,000
EUR
|
326,000,000
EUR
|
— | — | — |
4 378,3
EUR
|
144,000,000
EUR
|
5 934,8
EUR
|
816,000,000
EUR
|
— |
1,515,000,000
EUR
|
1 631,2
EUR
|
5 949,2
EUR
|
— | — |
48,000,000
EUR
|
— | — |
6 063,8
EUR
|
131,000,000
EUR
|
2,937,000,000
EUR
|
1 631,2
EUR
|
6 076,9
EUR
|
4 062,1
EUR
|
48,000,000
EUR
|
816,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,100,000,000
EUR
|
— |
6,247,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — |
5,278,000,000
EUR
|
— |
4,710,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
110,000,000
EUR
|
— |
1 326,8
EUR
|
— | — | — |
4,894,000,000
EUR
|
— | — | — | — | — | — |
1 337,8
EUR
|
8,374,000,000
EUR
|
1,537,000,000
EUR
|
— | — | — | — |
5,927,000,000
EUR
|
— | — | — |
4,452,000,000
EUR
|
62,000,000
EUR
|
— | — |
1,475,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Issue of equity | — | — |
1 751,4
EUR
|
— |
1 747,2
EUR
|
— | — | — | — |
42,000,000
EUR
|
— | — | — |
1 751,4
EUR
|
— |
4,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
4,000,000
EUR
|
4,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
58,000,000
EUR
|
— |
2,384,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
2,442,000,000
EUR
|
2,384,000,000
EUR
|
2,341,000,000
EUR
|
— | — | — | — |
2,279,000,000
EUR
|
— | — | — | — |
62,000,000
EUR
|
— | — |
2,279,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
3,000,000
EUR
|
— |
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
3,000,000
EUR
|
— | — | — | — | — |
13,000,000
EUR
|
— | — | — | — |
13,000,000
EUR
|
— | — |
13,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
200,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
200,000,000
EUR
|
200,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |