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 |
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 |
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 |
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 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
338,000,000
EUR
|
5,139,000,000
EUR
|
— | — |
3 543,6
EUR
|
1 446,0
EUR
|
— |
2 236,2
EUR
|
1 307,4
EUR
|
— |
3,101,000,000
EUR
|
— | — | — |
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
|
— | — |
331,000,000
EUR
|
2,552,000,000
EUR
|
3,118,000,000
EUR
|
3 335,5
EUR
|
1 610,6
EUR
|
1 191,1
EUR
|
2 144,4
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
505,000,000
EUR
|
— | — |
–
EUR
|
2,116,000,000
EUR
|
— | — |
2,116,000,000
EUR
|
— | — |
–
EUR
|
— |
–
EUR
|
2,621,000,000
EUR
|
5,238,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
–
EUR
|
— |
3,077,000,000
EUR
|
–
EUR
|
— |
2,160,000,000
EUR
|
3,077,000,000
EUR
|
— | — | — | — | — | — | — |
| Comprehensive income |
505,000,000
EUR
|
— | — |
–
EUR
|
2,148,000,000
EUR
|
— | — |
2,148,000,000
EUR
|
— | — |
–
EUR
|
— |
–
EUR
|
2,653,000,000
EUR
|
5,235,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
–
EUR
|
— |
3,074,000,000
EUR
|
–
EUR
|
— |
2,160,000,000
EUR
|
3,074,000,000
EUR
|
— | — | — | — | — | — | — |
| Issue of equity |
383,000,000
EUR
|
— | — |
–
EUR
|
4,329,000,000
EUR
|
— | — |
0
EUR
|
— | — |
461,000,000
EUR
|
— |
3,868,000,000
EUR
|
4,712,000,000
EUR
|
690,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
602,000,000
EUR
|
— |
0
EUR
|
88,000,000
EUR
|
— |
0
EUR
|
689,000,000
EUR
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
254,000,000
EUR
|
— | — |
–
EUR
|
1,661,000,000
EUR
|
— | — |
594,000,000
EUR
|
— | — |
–
EUR
|
— |
1,067,000,000
EUR
|
1,915,000,000
EUR
|
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
|
— | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
4,000,000
EUR
|
— | — |
–
EUR
|
18,000,000
EUR
|
— | — |
18,000,000
EUR
|
— | — |
0
EUR
|
— |
–
EUR
|
22,000,000
EUR
|
2,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
–
EUR
|
— |
2,000,000
EUR
|
–
EUR
|
— |
0
EUR
|
2,000,000
EUR
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
2,571,000,000
EUR
|
— | — |
–
EUR
|
26,000,000
EUR
|
— | — |
26,000,000
EUR
|
— | — |
–
EUR
|
— |
–
EUR
|
2,596,000,000
EUR
|
9,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
–
EUR
|
— |
36,000,000
EUR
|
–
EUR
|
— |
26,000,000
EUR
|
36,000,000
EUR
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
0
EUR
|
— | — |
–
EUR
|
174,000,000
EUR
|
— | — |
174,000,000
EUR
|
— | — |
–
EUR
|
— |
–
EUR
|
174,000,000
EUR
|
91,000,000
EUR
|
— | — |
–
EUR
|
— | — | — |
–
EUR
|
— |
91,000,000
EUR
|
–
EUR
|
— |
0
EUR
|
91,000,000
EUR
|
— | — | — | — | — | — | — |