Statement Of Changes In Equity [Abstract]
| Concept |
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 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 |
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 |
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 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 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 |
As at 2019-12-31 |
As at 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 |
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 |
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 |
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 |
2 715,9
EUR
|
— | — | — |
62,000,000
EUR
|
301,000,000
EUR
|
590,000,000
EUR
|
2 896,6
EUR
|
— |
1,699,000,000
EUR
|
— |
67,000,000
EUR
|
6,332,000,000
EUR
|
2 088,9
EUR
|
6,144,000,000
EUR
|
— | — |
2 955,6
EUR
|
— | — | — | — | — | — | — | — | — |
2 763,1
EUR
|
2 340,0
EUR
|
4,196,000,000
EUR
|
1,212,000,000
EUR
|
— |
3 162,0
EUR
|
5,209,000,000
EUR
|
— |
274,000,000
EUR
|
35,000,000
EUR
|
— |
1,590,000,000
EUR
|
— |
3 113,7
EUR
|
483,000,000
EUR
|
— | — |
29,000,000
EUR
|
1 992,2
EUR
|
167,000,000
EUR
|
5,596,000,000
EUR
|
2 443,8
EUR
|
1,590,000,000
EUR
|
5,204,000,000
EUR
|
3 250,8
EUR
|
363,000,000
EUR
|
3 214,5
EUR
|
4,487,000,000
EUR
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
323,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,194,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
2,382,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
249,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
2,059,000,000
EUR
|
321,000,000
EUR
|
301,000,000
EUR
|
— | — | — | — |
-
EUR
|
— |
97,000,000
EUR
|
— | — | — | — |
2,360,000,000
EUR
|
-
EUR
|
— |
2,136,000,000
EUR
|
-
EUR
|
-
EUR
|
2,059,000,000
EUR
|
547,000,000
EUR
|
262,000,000
EUR
|
291,000,000
EUR
|
1,212,000,000
EUR
|
950,000,000
EUR
|
— | — | — | — |
5,000,000
EUR
|
— | — |
945,000,000
EUR
|
— | — |
6,000,000
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — |
1,198,000,000
EUR
|
-
EUR
|
-
EUR
|
— | — | — | — |
-
EUR
|
— |
-
EUR
|
— | — | — | — |
-
EUR
|
114,000,000
EUR
|
— |
-
EUR
|
-
EUR
|
1,084,000,000
EUR
|
1,198,000,000
EUR
|
-
EUR
|
-
EUR
|
-
EUR
|
-
EUR
|
5,000,000
EUR
|
— | — | — | — |
-
EUR
|
— | — |
5,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
5,000,000
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
1,376,000,000
EUR
|
1,359,000,000
EUR
|
-
EUR
|
— | — | — | — |
-
EUR
|
— |
-
EUR
|
— | — | — | — |
1,359,000,000
EUR
|
-
EUR
|
— |
-
EUR
|
17,000,000
EUR
|
-
EUR
|
1,359,000,000
EUR
|
1,700,000,000
EUR
|
1,700,000,000
EUR
|
-
EUR
|
-
EUR
|
1,700,000,000
EUR
|
— | — | — | — |
24,000,000
EUR
|
— | — |
1,724,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — |
149,000,000
EUR
|
58,000,000
EUR
|
-
EUR
|
— | — | — | — |
207,000,000
EUR
|
— |
-
EUR
|
— | — | — | — |
58,000,000
EUR
|
-
EUR
|
— |
-
EUR
|
-
EUR
|
-
EUR
|
149,000,000
EUR
|
209,000,000
EUR
|
209,000,000
EUR
|
-
EUR
|
-
EUR
|
316,000,000
EUR
|
— | — | — | — |
-
EUR
|
— | — |
316,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
107,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
122,000,000
EUR
|
2,000,000
EUR
|
-
EUR
|
— | — | — | — |
-
EUR
|
— |
-
EUR
|
— | — | — | — |
2,000,000
EUR
|
-
EUR
|
— |
-
EUR
|
124,000,000
EUR
|
-
EUR
|
2,000,000
EUR
|
43,000,000
EUR
|
43,000,000
EUR
|
-
EUR
|
-
EUR
|
43,000,000
EUR
|
— | — | — | — |
149,000,000
EUR
|
— | — |
106,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
58,000,000
EUR
|
58,000,000
EUR
|
-
EUR
|
— | — | — | — |
-
EUR
|
— |
-
EUR
|
— | — | — | — |
58,000,000
EUR
|
-
EUR
|
— |
-
EUR
|
-
EUR
|
-
EUR
|
58,000,000
EUR
|
96,000,000
EUR
|
96,000,000
EUR
|
-
EUR
|
-
EUR
|
96,000,000
EUR
|
— | — | — | — |
-
EUR
|
— | — |
96,000,000
EUR
|
— | — |
-
EUR
|
— |
-
EUR
|
— | — |
-
EUR
|
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |