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 |
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 |
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 |
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 |
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 |
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 |
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 | — |
31,000,000
EUR
|
— | — |
1,393,000,000
EUR
|
1 373,9
EUR
|
— | — | — |
391,000,000
EUR
|
1 364,7
EUR
|
92,000,000
EUR
|
— |
1 053,4
EUR
|
2,141,000,000
EUR
|
— | — |
48,000,000
EUR
|
— |
1,711,000,000
EUR
|
6,368,000,000
EUR
|
1,441,000,000
EUR
|
— | — |
1,076,000,000
EUR
|
1,000,000
EUR
|
5,023,000,000
EUR
|
— |
6,416,000,000
EUR
|
— | — | — |
6,610,000,000
EUR
|
195,000,000
EUR
|
6,805,000,000
EUR
|
5,010,000,000
EUR
|
852,000,000
EUR
|
38,000,000
EUR
|
916,000,000
EUR
|
1,702,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
402,000,000
EUR
|
33,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,112,000,000
EUR
|
558,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
55,000,000
EUR
|
— |
-
EUR
|
1,459,000,000
EUR
|
— | — |
1,049,000,000
EUR
|
-
EUR
|
410,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
1,514,000,000
EUR
|
525,000,000
EUR
|
— |
-
EUR
|
— | — | — |
39,000,000
EUR
|
525,000,000
EUR
|
— | — | — |
-
EUR
|
— |
39,000,000
EUR
|
-
EUR
|
486,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Issue of equity |
24,000,000
EUR
|
— |
-
EUR
|
5,941,000,000
EUR
|
— | — |
-
EUR
|
5,512,000,000
EUR
|
-
EUR
|
— | — | — |
430,000,000
EUR
|
— | — |
5,917,000,000
EUR
|
271,000,000
EUR
|
— |
-
EUR
|
— | — | — |
249,000,000
EUR
|
-
EUR
|
— | — | — |
9,000,000
EUR
|
— |
0
EUR
|
12,000,000
EUR
|
270,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
2,000,000
EUR
|
— |
-
EUR
|
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
-
EUR
|
— | — | — |
-
EUR
|
— | — |
2,000,000
EUR
|
109,000,000
EUR
|
— |
-
EUR
|
— | — | — |
-
EUR
|
-
EUR
|
— | — | — |
-
EUR
|
— |
109,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity |
-
EUR
|
— |
30,000,000
EUR
|
121,000,000
EUR
|
— | — |
-
EUR
|
-
EUR
|
90,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
121,000,000
EUR
|
41,000,000
EUR
|
— |
37,000,000
EUR
|
— | — | — |
78,000,000
EUR
|
-
EUR
|
— | — | — |
-
EUR
|
— |
-
EUR
|
-
EUR
|
41,000,000
EUR
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
16,000,000
EUR
|
— |
-
EUR
|
7,000,000
EUR
|
— | — |
0
EUR
|
-
EUR
|
6,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
22,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
EUR
|
— |
-
EUR
|
85,000,000
EUR
|
— | — |
-
EUR
|
-
EUR
|
85,000,000
EUR
|
— | — | — |
-
EUR
|
— | — |
85,000,000
EUR
|
62,000,000
EUR
|
— |
-
EUR
|
— | — | — |
62,000,000
EUR
|
-
EUR
|
— | — | — |
-
EUR
|
— |
-
EUR
|
-
EUR
|
62,000,000
EUR
|
— | — | — | — | — | — | — | — |