Statement Of Comprehensive Income [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 |
2021-01-01 to 2021-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||
| Profit (loss) |
4,000,000
EUR
|
— |
3,940,000,000
EUR
|
3,936,000,000
EUR
|
3,940,000,000
EUR
|
3,389,000,000
EUR
|
3,385,000,000
EUR
|
4,000,000
EUR
|
3,389,000,000
EUR
|
— |
| Other comprehensive income [abstract] | ||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans | — | — | — |
27,000,000
EUR
|
— | — |
22,000,000
EUR
|
— | — | — |
| Other comprehensive income | — |
27,000,000
EUR
|
27,000,000
EUR
|
27,000,000
EUR
|
— | — |
12,000,000
EUR
|
— |
12,000,000
EUR
|
12,000,000
EUR
|
| Comprehensive income |
4,000,000
EUR
|
27,000,000
EUR
|
3,967,000,000
EUR
|
3,963,000,000
EUR
|
3,940,000,000
EUR
|
3,389,000,000
EUR
|
3,397,000,000
EUR
|
4,000,000
EUR
|
3,401,000,000
EUR
|
12,000,000
EUR
|
| Comprehensive income attributable to [abstract] | ||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — |
3,967,000,000
EUR
|
— | — |
3,401,000,000
EUR
|
— | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — |
4,000,000
EUR
|
— | — |
4,000,000
EUR
|
— | — | — |