Statement Of Changes In Equity [Abstract]
| Concept |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
2019-04-01 to 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
As at 2019-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity |
421,000,000
EUR
|
653,000,000
EUR
|
2,296,400
EUR
|
2,527,200
EUR
|
3,574,000,000
EUR
|
97,000,000
EUR
|
311,000,000
EUR
|
42,000,000
EUR
|
2,523,000
EUR
|
20,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
36,000,000
EUR
|
2,355,800
EUR
|
2,184,700
EUR
|
— |
2,359,400
EUR
|
18,000,000
EUR
|
1,288,000,000
EUR
|
— | — | — | — | — |
56,000,000
EUR
|
— | — |
291,000,000
EUR
|
— |
219,000,000
EUR
|
3,471,000,000
EUR
|
490,000,000
EUR
|
2,207,700
EUR
|
33,000,000
EUR
|
2,204,400
EUR
|
31,000,000
EUR
|
5,000,000
EUR
|
5,000,000
EUR
|
5,000,000
EUR
|
94,000,000
EUR
|
3,312,000,000
EUR
|
2,182,000
EUR
|
11,000,000
EUR
|
2,524,000,000
EUR
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — |
4,160,000,000
EUR
|
— | — | — |
4,153,000,000
EUR
|
— |
7,000,000
EUR
|
4,153,000,000
EUR
|
— | — | — | — | — | — | — | — |
5,000,000
EUR
|
4,310,000,000
EUR
|
4,315,000,000
EUR
|
— | — | — | — |
4,310,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — |
2,000,000
EUR
|
183,000,000
EUR
|
130,000,000
EUR
|
41,000,000
EUR
|
— | — |
92,000,000
EUR
|
— |
183,000,000
EUR
|
199,000,000
EUR
|
— | — | — | — | — | — | — | — |
92,000,000
EUR
|
92,000,000
EUR
|
7,000,000
EUR
|
— | — |
25,000,000
EUR
|
— | — |
125,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — | — |
2,000,000
EUR
|
3,977,000,000
EUR
|
130,000,000
EUR
|
41,000,000
EUR
|
— |
4,153,000,000
EUR
|
92,000,000
EUR
|
7,000,000
EUR
|
3,970,000,000
EUR
|
199,000,000
EUR
|
— | — | — | — | — | — | — |
5,000,000
EUR
|
4,402,000,000
EUR
|
4,407,000,000
EUR
|
7,000,000
EUR
|
— | — |
25,000,000
EUR
|
4,310,000,000
EUR
|
— |
125,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — |
121,000,000
EUR
|
— | — |
103,000,000
EUR
|
18,000,000
EUR
|
— | — |
121,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
186,000,000
EUR
|
186,000,000
EUR
|
— |
159,000,000
EUR
|
— | — |
27,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — | — | — | — | — |
1,839,000,000
EUR
|
— | — | — |
1,831,000,000
EUR
|
— |
8,000,000
EUR
|
1,831,000,000
EUR
|
— | — | — | — | — | — | — | — |
9,000,000
EUR
|
1,803,000,000
EUR
|
1,812,000,000
EUR
|
— | — | — | — |
1,803,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — |
19,000,000
EUR
|
— | — | — |
19,000,000
EUR
|
— | — |
19,000,000
EUR
|
— | — | — | — | — | — | — | — | — |
25,000,000
EUR
|
25,000,000
EUR
|
— | — | — | — |
25,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
8,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — | — | — | — | — | — | — | — |
84,000,000
EUR
|
— | — | — |
78,000,000
EUR
|
— |
6,000,000
EUR
|
78,000,000
EUR
|
— | — | — | — | — | — | — | — |
19,000,000
EUR
|
85,000,000
EUR
|
66,000,000
EUR
|
— | — | — | — |
85,000,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |