Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 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 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
9,582,000,000
EUR
|
2,338,000,000
EUR
|
1 758,5
EUR
|
— |
2,640,000,000
EUR
|
239,000,000
EUR
|
— |
1 284,7
EUR
|
— | — |
2 716,7
EUR
|
— | — |
2 144,4
EUR
|
1 191,1
EUR
|
— | — |
3,118,000,000
EUR
|
3 335,5
EUR
|
— |
1 610,6
EUR
|
— |
331,000,000
EUR
|
— |
2,552,000,000
EUR
|
— | — |
1 401,4
EUR
|
4,079,000,000
EUR
|
546,000,000
EUR
|
2,454,000,000
EUR
|
3 229,4
EUR
|
1 229,3
EUR
|
2 000,1
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
5,238,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
-
EUR
|
— |
3,077,000,000
EUR
|
-
EUR
|
— |
2,160,000,000
EUR
|
3,077,000,000
EUR
|
— | — |
2,337,000,000
EUR
|
18,000,000
EUR
|
— | — |
2,337,000,000
EUR
|
— |
2,355,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Comprehensive income |
5,235,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
-
EUR
|
— |
3,074,000,000
EUR
|
-
EUR
|
— |
2,160,000,000
EUR
|
3,074,000,000
EUR
|
— | — |
2,330,000,000
EUR
|
18,000,000
EUR
|
— | — |
2,330,000,000
EUR
|
— |
2,348,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Issue of equity |
690,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
602,000,000
EUR
|
— |
0
EUR
|
88,000,000
EUR
|
— |
0
EUR
|
689,000,000
EUR
|
— | — |
995,000,000
EUR
|
0
EUR
|
— | — |
0
EUR
|
— |
995,000,000
EUR
|
— |
898,000,000
EUR
|
— |
98,000,000
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
1,709,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
1,381,000,000
EUR
|
— |
132,000,000
EUR
|
-
EUR
|
— |
195,000,000
EUR
|
1,514,000,000
EUR
|
— | — |
2,056,000,000
EUR
|
400,000,000
EUR
|
— | — |
198,000,000
EUR
|
— |
2,457,000,000
EUR
|
— |
1,858,000,000
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
2,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
-
EUR
|
— |
2,000,000
EUR
|
-
EUR
|
— |
0
EUR
|
2,000,000
EUR
|
— | — |
1,000,000
EUR
|
1,000,000
EUR
|
— | — |
1,000,000
EUR
|
— |
0
EUR
|
— |
-
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
9,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
-
EUR
|
— |
36,000,000
EUR
|
-
EUR
|
— |
26,000,000
EUR
|
36,000,000
EUR
|
— | — |
0
EUR
|
1,000,000
EUR
|
— | — |
0
EUR
|
— |
1,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
91,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
-
EUR
|
— |
91,000,000
EUR
|
-
EUR
|
— |
0
EUR
|
91,000,000
EUR
|
— | — |
105,000,000
EUR
|
0
EUR
|
— | — |
105,000,000
EUR
|
— |
105,000,000
EUR
|
— |
-
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — |