Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
0
EUR
|
810,000,000
EUR
|
— |
1,057,000,000
EUR
|
247,000,000
EUR
|
— |
0
EUR
|
1,000,000
EUR
|
— | — | — |
710,000,000
EUR
|
— |
1,000,000
EUR
|
— |
247,000,000
EUR
|
2,000,000
EUR
|
1,000,000
EUR
|
957,000,000
EUR
|
— |
1,000,000
EUR
|
247,000,000
EUR
|
817,000,000
EUR
|
569,000,000
EUR
|
-
EUR
|
1,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
196,000,000
EUR
|
196,000,000
EUR
|
233,000,000
EUR
|
— | — | — |
233,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — |
1,000,000
EUR
|
— | — |
1,000,000
EUR
|
— |
2,000,000
EUR
|
— | — | — | — | — | — | — | — |
2,000,000
EUR
|
— | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — |
1,000,000
EUR
|
— | — |
196,000,000
EUR
|
196,000,000
EUR
|
235,000,000
EUR
|
— | — | — |
233,000,000
EUR
|
— | — | — | — |
2,000,000
EUR
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — | — |
96,000,000
EUR
|
96,000,000
EUR
|
92,000,000
EUR
|
— | — | — |
92,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — |
1,000,000
EUR
|
— | — | — | — | — |
1,000,000
EUR
|
— |
3,000,000
EUR
|
— |
3,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — | — | — |
0
EUR
|
0
EUR
|
1,000,000
EUR
|
— | — | — |
1,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |