Statement Of Comprehensive Income [Abstract]
| Concept |
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 |
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 |
2019-04-01 to 2020-03-31 |
2019-04-01 to 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||||
| Profit (loss) | — | — | — |
4,153,000,000
EUR
|
— |
4,160,000,000
EUR
|
7,000,000
EUR
|
4,153,000,000
EUR
|
— |
5,000,000
EUR
|
— |
4,310,000,000
EUR
|
4,310,000,000
EUR
|
— |
4,315,000,000
EUR
|
— |
| Other comprehensive income [abstract] | ||||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||||
| Other comprehensive income, net of tax, gains (losses) from investments in equity instruments | — | — | — | — | — |
41,000,000
EUR
|
— | — | — | — | — | — | — | — |
25,000,000
EUR
|
— |
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans | — | — | — | — | — |
130,000,000
EUR
|
— | — | — | — | — | — | — | — |
199,000,000
EUR
|
— |
| Other comprehensive income that will not be reclassified to profit or loss, net of tax | — | — | — | — | — |
89,000,000
EUR
|
— | — | — | — | — | — | — | — |
224,000,000
EUR
|
— |
| Components of other comprehensive income that will be reclassified to profit or loss, net of tax [abstract] | ||||||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||||||
| Other comprehensive income, net of tax, exchange differences on translation of foreign operations | — | — | — | — | — |
2,000,000
EUR
|
— | — | — | — | — | — | — | — |
7,000,000
EUR
|
— |
| Financial assets measured at fair value through other comprehensive income [abstract] | ||||||||||||||||
| Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income | — | — | — | — | — |
22,000,000
EUR
|
— | — | — | — | — | — | — | — |
4,000,000
EUR
|
— |
| Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax | — | — | — | — | — |
114,000,000
EUR
|
— | — | — | — | — | — | — | — |
129,000,000
EUR
|
— |
| Other comprehensive income that will be reclassified to profit or loss, net of tax | — | — | — | — | — |
20,000,000
EUR
|
— | — | — | — | — | — | — | — |
3,000,000
EUR
|
— |
| Other comprehensive income |
2,000,000
EUR
|
130,000,000
EUR
|
41,000,000
EUR
|
— |
92,000,000
EUR
|
183,000,000
EUR
|
— |
183,000,000
EUR
|
199,000,000
EUR
|
— |
25,000,000
EUR
|
— |
92,000,000
EUR
|
125,000,000
EUR
|
92,000,000
EUR
|
7,000,000
EUR
|
| Comprehensive income |
2,000,000
EUR
|
130,000,000
EUR
|
41,000,000
EUR
|
4,153,000,000
EUR
|
92,000,000
EUR
|
3,977,000,000
EUR
|
7,000,000
EUR
|
3,970,000,000
EUR
|
199,000,000
EUR
|
5,000,000
EUR
|
25,000,000
EUR
|
4,310,000,000
EUR
|
4,402,000,000
EUR
|
125,000,000
EUR
|
4,407,000,000
EUR
|
7,000,000
EUR
|
| Comprehensive income attributable to [abstract] | ||||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
3,970,000,000
EUR
|
— | — | — | — | — | — | — | — |
4,402,000,000
EUR
|
— |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — |
7,000,000
EUR
|
— | — | — | — | — | — | — | — |
5,000,000
EUR
|
— |