Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 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 |
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 |
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 |
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 |
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 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | — | — |
11 830
EUR
|
— |
10 305
EUR
|
4,000,000
EUR
|
10 251
EUR
|
1 579
EUR
|
1 990
EUR
|
1 940
EUR
|
— | — |
10 178
EUR
|
— |
42,000,000
EUR
|
1 507
EUR
|
10 103
EUR
|
2 044
EUR
|
2 078
EUR
|
— |
11 609
EUR
|
— | — | — | — | — |
11 985
EUR
|
2 018
EUR
|
1 740
EUR
|
1 381
EUR
|
33,000,000
EUR
|
9 640
EUR
|
10 245
EUR
|
9 937
EUR
|
1 736
EUR
|
4,000,000
EUR
|
1 381
EUR
|
11 673
EUR
|
308,000,000
EUR
|
2 018
EUR
|
312,000,000
EUR
|
308,000,000
EUR
|
33,000,000
EUR
|
9 332
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
229,000,000
EUR
|
— |
1 072
EUR
|
1 072
EUR
|
— | — | — | — | — | — | — | — | — |
1 301
EUR
|
— |
831,000,000
EUR
|
— | — | — | — | — | — | — | — |
190,000,000
EUR
|
641,000,000
EUR
|
— |
641,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
27,000,000
EUR
|
37,000,000
EUR
|
27,000,000
EUR
|
153,000,000
EUR
|
— |
88,000,000
EUR
|
— | — | — | — | — | — | — |
179,000,000
EUR
|
— |
1 061
EUR
|
— | — | — | — | — | — | — |
697,000,000
EUR
|
335,000,000
EUR
|
20,000,000
EUR
|
10,000,000
EUR
|
726,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
256,000,000
EUR
|
37,000,000
EUR
|
1 099
EUR
|
1 224
EUR
|
— |
88,000,000
EUR
|
— | — | — | — | — | — | — |
1 481
EUR
|
— |
231,000,000
EUR
|
— | — | — | — | — | — | — |
697,000,000
EUR
|
145,000,000
EUR
|
621,000,000
EUR
|
10,000,000
EUR
|
85,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
198,000,000
EUR
|
— |
383,000,000
EUR
|
383,000,000
EUR
|
— | — | — | — | — | — | — | — |
−
EUR
|
581,000,000
EUR
|
— |
166,000,000
EUR
|
— | — | — | — | — |
26,000,000
EUR
|
— | — |
108,000,000
EUR
|
83,000,000
EUR
|
— |
57,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
1,000,000
EUR
|
— |
25,000,000
EUR
|
25,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
26,000,000
EUR
|
— |
23,000,000
EUR
|
— | — | — | — | — | — | — | — |
1,000,000
EUR
|
23,000,000
EUR
|
— |
23,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |