Statement Of Changes In Equity [Abstract]

SES FDR - Filing #2817363

Concept	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	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	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	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	2020-01-01 to 2020-12-31	As at 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	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	2020-01-01 to 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	2020-01-01 to 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	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	—	189,000,000 EUR	453,000,000 EUR	2,227,000,000 EUR	—	—	—	5,733,000,000 EUR	—	—	—	1,175,000,000 EUR	5,670,000,000 EUR	1,636,000,000 EUR	—	351,000,000 EUR	719,000,000 EUR	63,000,000 EUR	—	—	—	86,000,000 EUR	72,000,000 EUR	—	719,000,000 EUR	5,366,000,000 EUR	—	76,000,000 EUR	710,000,000 EUR	2,583,000,000 EUR	1,636,000,000 EUR	—	—	5,438,000,000 EUR	—	—	—	—	1,300,000,000 EUR	—	6,173,000,000 EUR	83,000,000 EUR	2,519,000,000 EUR	207,000,000 EUR	1,636,000,000 EUR	6,256,000,000 EUR	296,000,000 EUR	90,000,000 EUR	719,000,000 EUR	1,300,000,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	7,000,000 EUR	—	—	—	– EUR	– EUR	453,000,000 EUR	—	– EUR	– EUR	– EUR	—	—	—	– EUR	—	—	—	446,000,000 EUR	453,000,000 EUR	95,000,000 EUR	—	—	– EUR	—	—	86,000,000 EUR	—	—	—	—	– EUR	– EUR	—	– EUR	9,000,000 EUR	– EUR	– EUR	—	86,000,000 EUR	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	– EUR	—	—	—	– EUR	3,000,000 EUR	362,000,000 EUR	—	– EUR	359,000,000 EUR	– EUR	—	—	—	– EUR	—	—	—	362,000,000 EUR	– EUR	501,000,000 EUR	—	—	– EUR	—	—	– EUR	—	—	—	—	4,000,000 EUR	– EUR	—	503,000,000 EUR	2,000,000 EUR	– EUR	– EUR	—	499,000,000 EUR	—	—	—	—	—	—	—	—	—	—
Comprehensive income	7,000,000 EUR	—	—	—	– EUR	3,000,000 EUR	815,000,000 EUR	—	– EUR	359,000,000 EUR	– EUR	—	—	—	– EUR	—	—	—	808,000,000 EUR	453,000,000 EUR	596,000,000 EUR	—	—	– EUR	—	—	86,000,000 EUR	—	—	—	—	4,000,000 EUR	– EUR	—	503,000,000 EUR	11,000,000 EUR	– EUR	– EUR	—	585,000,000 EUR	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	2,000,000 EUR	—	—	—	– EUR	181,000,000 EUR	181,000,000 EUR	—	– EUR	– EUR	– EUR	—	—	—	– EUR	—	—	—	183,000,000 EUR	– EUR	182,000,000 EUR	—	—	– EUR	—	—	– EUR	—	—	—	—	182,000,000 EUR	– EUR	—	– EUR	– EUR	– EUR	– EUR	—	182,000,000 EUR	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2,000,000 EUR	—	—	– EUR	—	—	– EUR	—	—	—	—	2,000,000 EUR	– EUR	—	– EUR	– EUR	– EUR	– EUR	—	2,000,000 EUR	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	– EUR	—	—	—	– EUR	5,000,000 EUR	5,000,000 EUR	—	– EUR	– EUR	– EUR	—	—	—	– EUR	—	—	—	5,000,000 EUR	– EUR	10,000,000 EUR	—	—	– EUR	—	—	– EUR	—	—	—	—	10,000,000 EUR	– EUR	—	– EUR	– EUR	– EUR	– EUR	—	10,000,000 EUR	—	—	—	—	—	—	—	—	—	—