Statement Of Changes In Equity [Abstract]

SES FDR - Filing #5985020

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Increase (decrease) through appropriation of retained earnings, equity	- EUR	- EUR	905,000,000 EUR	- EUR	- EUR	- EUR	- EUR	905,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	34,000,000 EUR	- EUR	- EUR	34,000,000 EUR	- EUR	- EUR	- EUR
Increase (decrease) through exercise of options, equity	21,000,000 EUR	- EUR	22,000,000 EUR	1,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	1,000,000 EUR	2,000,000 EUR	12,000,000 EUR	2,000,000 EUR	10,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR
Increase (decrease) through conversion of convertible instruments, equity	- EUR	37,000,000 EUR	2,000,000 EUR	35,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	35,000,000 EUR	550,000,000 EUR	- EUR	550,000,000 EUR	- EUR	550,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR
Increase (decrease) through transactions with owners, equity	103,000,000 EUR	- EUR	315,000,000 EUR	418,000,000 EUR	- EUR	- EUR	- EUR	- EUR	1,000,000 EUR	419,000,000 EUR	242,000,000 EUR	15,000,000 EUR	236,000,000 EUR	222,000,000 EUR	- EUR	6,000,000 EUR	- EUR	- EUR	1,000,000 EUR	- EUR
Purchase of treasury shares	124,000,000 EUR	- EUR	- EUR	124,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	124,000,000 EUR	27,000,000 EUR	27,000,000 EUR	27,000,000 EUR	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR	- EUR