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 |
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 |
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 |
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 |
2020-01-01 to 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 |
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 |
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 | — |
7,305,000,000
EUR
|
5 712,6
EUR
|
— | — | — |
6 211,0
EUR
|
— | — | — |
260,000,000
EUR
|
— | — |
6 197,3
EUR
|
1 108,0
EUR
|
— |
137,000,000
EUR
|
1,333,000,000
EUR
|
— | — | — |
5 043,7
EUR
|
448,000,000
EUR
|
— | — |
1,326,000,000
EUR
|
5 061,3
EUR
|
— | — |
6,269,000,000
EUR
|
— |
4,421,000,000
EUR
|
9,540,000,000
EUR
|
— | — |
5 106,1
EUR
|
— | — | — | — |
5 208,7
EUR
|
539,000,000
EUR
|
5 262,6
EUR
|
8,633,000,000
EUR
|
4 653,2
EUR
|
104,000,000
EUR
|
4,502,000,000
EUR
|
1,320,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
2,000,000
EUR
|
— | — |
-
EUR
|
— |
7,737,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
7,738,000,000
EUR
|
7,737,000,000
EUR
|
4,855,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
4,910,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
55,000,000
EUR
|
-
EUR
|
4,910,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
27,000,000
EUR
|
— | — |
-
EUR
|
116,000,000
EUR
|
6,008,000,000
EUR
|
— |
-
EUR
|
38,000,000
EUR
|
6,008,000,000
EUR
|
— |
39,000,000
EUR
|
6,123,000,000
EUR
|
— | — |
-
EUR
|
— | — |
6,036,000,000
EUR
|
-
EUR
|
6,412,000,000
EUR
|
— | — |
40,000,000
EUR
|
-
EUR
|
— | — |
-
EUR
|
6,373,000,000
EUR
|
— |
34,000,000
EUR
|
— | — |
223,000,000
EUR
|
-
EUR
|
— |
6,602,000,000
EUR
|
39,000,000
EUR
|
-
EUR
|
6,373,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
29,000,000
EUR
|
— | — |
-
EUR
|
— |
1 374,5
EUR
|
— |
-
EUR
|
— |
6,008,000,000
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
1 377,4
EUR
|
7,737,000,000
EUR
|
1,557,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
4,910,000,000
EUR
|
6,373,000,000
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
94,000,000
EUR
|
-
EUR
|
1,463,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
-
EUR
|
— | — |
-
EUR
|
— |
1,471,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
1,471,000,000
EUR
|
1,471,000,000
EUR
|
1,825,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
1,825,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
1,825,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
-
EUR
|
— | — |
-
EUR
|
— |
933,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
933,000,000
EUR
|
933,000,000
EUR
|
333,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
332,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
1,000,000
EUR
|
-
EUR
|
332,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
-
EUR
|
— | — |
2,884,000,000
EUR
|
— |
5,218,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
5,218,000,000
EUR
|
2,334,000,000
EUR
|
1,662,000,000
EUR
|
— | — | — |
81,000,000
EUR
|
— | — |
1,743,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
1,662,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
347,000,000
EUR
|
— | — |
-
EUR
|
— |
126,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
221,000,000
EUR
|
126,000,000
EUR
|
468,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
474,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
6,000,000
EUR
|
-
EUR
|
474,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
7,000,000
EUR
|
— | — |
-
EUR
|
— |
1,698,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
1,705,000,000
EUR
|
1,698,000,000
EUR
|
1,765,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
1,757,000,000
EUR
|
-
EUR
|
— | — | — | — | — |
-
EUR
|
— | — |
8,000,000
EUR
|
-
EUR
|
1,757,000,000
EUR
|
— | — | — | — | — | — | — | — |