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 |
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 |
As at 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 |
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 |
As at 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 |
2019-01-01 to 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 | — |
1,651,000,000
EUR
|
— | — |
7,997,000,000
EUR
|
3,367,000,000
EUR
|
1,685,000,000
EUR
|
— | — |
7,464,000,000
EUR
|
1,385,000,000
EUR
|
533,000,000
EUR
|
1,455,000,000
EUR
|
4,133,000,000
EUR
|
— | — |
395,000,000
EUR
|
36,000,000
EUR
|
5,383,000,000
EUR
|
4,167,000,000
EUR
|
1,060,000,000
EUR
|
— | — |
1,490,000,000
EUR
|
1,682,000,000
EUR
|
5,778,000,000
EUR
|
— | — | — |
3,862,000,000
EUR
|
334,000,000
EUR
|
276,000,000
EUR
|
784,000,000
EUR
|
4,196,000,000
EUR
|
— |
224,000,000
EUR
|
424,000,000
EUR
|
4,002,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
67,000,000
EUR
|
— | — |
2,426,000,000
EUR
|
— | — | — |
2,426,000,000
EUR
|
— | — | — | — | — | — |
2,493,000,000
EUR
|
2,096,000,000
EUR
|
— | — | — | — | — |
2,021,000,000
EUR
|
— | — | — | — | — |
75,000,000
EUR
|
2,021,000,000
EUR
|
— | — | — | — | — |
2,096,000,000
EUR
|
— | — | — |
| Other comprehensive income |
1,000,000
EUR
|
— |
3,403,000,000
EUR
|
2,596,000,000
EUR
|
— | — | — |
842,000,000
EUR
|
35,000,000
EUR
|
— | — | — | — | — |
2,597,000,000
EUR
|
872,000,000
EUR
|
— | — | — | — | — |
129,000,000
EUR
|
387,000,000
EUR
|
— | — | — |
1,048,000,000
EUR
|
82,000,000
EUR
|
790,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
68,000,000
EUR
|
— |
3,403,000,000
EUR
|
5,022,000,000
EUR
|
— | — | — |
1,584,000,000
EUR
|
35,000,000
EUR
|
— | — | — | — | — |
5,090,000,000
EUR
|
1,224,000,000
EUR
|
— | — | — | — | — |
1,892,000,000
EUR
|
387,000,000
EUR
|
— | — | — |
1,048,000,000
EUR
|
7,000,000
EUR
|
1,231,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
22,000,000
EUR
|
— | — |
1,142,000,000
EUR
|
— | — | — |
1,142,000,000
EUR
|
— | — | — | — | — | — |
1,164,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — |
28,000,000
EUR
|
— | — | — |
28,000,000
EUR
|
— | — | — | — | — | — |
28,000,000
EUR
|
5,000,000
EUR
|
— | — | — | — | — |
162,000,000
EUR
|
— | — | — | — |
166,000,000
EUR
|
1,000,000
EUR
|
4,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
140,000,000
EUR
|
— | — | — | — | — |
103,000,000
EUR
|
1,000,000
EUR
|
— | — | — | — |
36,000,000
EUR
|
104,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
2,000,000
EUR
|
— | — |
86,000,000
EUR
|
— | — | — |
86,000,000
EUR
|
— | — | — | — | — | — |
84,000,000
EUR
|
52,000,000
EUR
|
— | — | — | — | — |
51,000,000
EUR
|
— | — | — | — | — |
1,000,000
EUR
|
51,000,000
EUR
|
— | — | — | — | — | — | — | — | — |