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 |
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 |
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 |
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 |
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 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
EUR
|
4,422,000,000
EUR
|
68,000,000
EUR
|
— | — | — | — |
5,272,000,000
EUR
|
5,000,000
EUR
|
— |
4,538,000,000
EUR
|
734,000,000
EUR
|
— |
149,000,000
EUR
|
192,000,000
EUR
|
— | — | — |
3,635,000,000
EUR
|
67,000,000
EUR
|
7,000,000
EUR
|
647,000,000
EUR
|
— |
192,000,000
EUR
|
3,706,000,000
EUR
|
— | — |
EUR
|
181,000,000
EUR
|
— | — |
4,353,000,000
EUR
|
— | — | — |
66,000,000
EUR
|
3,292,000,000
EUR
|
533,000,000
EUR
|
129,000,000
EUR
|
3,825,000,000
EUR
|
3,197,000,000
EUR
|
41,000,000
EUR
|
7,000,000
EUR
|
192,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
153,000,000
EUR
|
— | — | — |
EUR
|
EUR
|
EUR
|
1,301,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
1,454,000,000
EUR
|
1,301,000,000
EUR
|
625,000,000
EUR
|
— | — | — | — |
EUR
|
— | — |
492,000,000
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
133,000,000
EUR
|
492,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
59,000,000
EUR
|
— |
57,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
155,000,000
EUR
|
— | — | — |
EUR
|
EUR
|
1,000,000
EUR
|
1,358,000,000
EUR
|
— | — |
32,000,000
EUR
|
— | — |
EUR
|
— | — |
1,513,000,000
EUR
|
1,316,000,000
EUR
|
568,000,000
EUR
|
— | — | — | — |
EUR
|
— | — |
499,000,000
EUR
|
14,000,000
EUR
|
— | — |
1,000,000
EUR
|
EUR
|
— |
52,000,000
EUR
|
134,000,000
EUR
|
434,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
100,000,000
EUR
|
— | — | — |
EUR
|
EUR
|
EUR
|
464,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
564,000,000
EUR
|
464,000,000
EUR
|
5,000,000
EUR
|
— | — | — | — |
EUR
|
— | — |
–
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
5,000,000
EUR
|
–
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
EUR
|
— | — | — |
3,000,000
EUR
|
–
EUR
|
EUR
|
5,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
5,000,000
EUR
|
8,000,000
EUR
|
2,000,000
EUR
|
— | — | — | — |
–
EUR
|
— | — |
1,000,000
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
1,000,000
EUR
|
1,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
10,000,000
EUR
|
— | — | — |
EUR
|
EUR
|
EUR
|
60,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
50,000,000
EUR
|
60,000,000
EUR
|
58,000,000
EUR
|
— | — | — | — |
41,000,000
EUR
|
— | — |
64,000,000
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
35,000,000
EUR
|
23,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
3,000,000
EUR
|
— | — | — |
EUR
|
EUR
|
EUR
|
3,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
6,000,000
EUR
|
3,000,000
EUR
|
5,000,000
EUR
|
— | — | — | — |
EUR
|
— | — |
2,000,000
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
3,000,000
EUR
|
2,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) in equity |
68,000,000
EUR
|
— | — | — |
3,000,000
EUR
|
EUR
|
EUR
|
526,000,000
EUR
|
— | — |
EUR
|
— | — |
EUR
|
— | — |
594,000,000
EUR
|
529,000,000
EUR
|
40,000,000
EUR
|
— | — | — | — |
41,000,000
EUR
|
— | — |
61,000,000
EUR
|
EUR
|
— | — |
EUR
|
EUR
|
— |
EUR
|
20,000,000
EUR
|
20,000,000
EUR
|
— | — | — | — | — | — | — | — | — |