Statement Of Changes In Equity [Abstract]

Alten - Filing #5981757

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	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	2024-01-01 to 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 2024-12-31	As at 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	As at 2024-12-31	As at 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	2023-01-01 to 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 2023-12-31	As at 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	As at 2023-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	—	—	—	60 250 EUR	—	37 031 EUR	0 EUR	3 363 EUR	9 616 EUR	—	2 209 350 EUR	—	1 931 903 EUR	2,000 EUR	2,000 EUR	0 EUR	—	—	—	—	2 209 350 EUR	186 419 EUR	—	—	2 037 136 EUR	—	233 205 EUR	—	—	0 EUR	—	60 250 EUR	36 879 EUR	19 832 EUR	—	8 980 EUR	2 037 137 EUR	3,000 EUR	2,000 EUR	(0) EUR	—	—	—	—	1 735 615 EUR	457 567 EUR	283,000 EUR	60 250 EUR	9 663 EUR	36 306 EUR	5 096 EUR	1 838 901 EUR	1 299 538 EUR	238,000 EUR	3,000 EUR	42,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	—	—	—	—	—	—	—	—	—	186 419 EUR	—	—	—	—	—	—	—	—	—	—	233 205 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	186 419 EUR	—	205 882 EUR	—	—	23 195 EUR	—	—	—	—	0 EUR	—	205 882 EUR	—	—	—	—	3 733 EUR	(0) EUR	—	0 EUR	—	—	221 129 EUR	—	—	233 205 EUR	—	221 129 EUR	0 EUR	—	14 736 EUR	—	—	—	—	—	—	—	—	—	2 660 EUR	—	0 EUR	(0) EUR	—	—	—	—	—	—	—	—	—	—	—	—
Issue of equity	—	—	(0) EUR	152,000 EUR	—	—	—	—	—	—	(0) EUR	—	—	—	—	—	—	152,000 EUR	—	—	—	—	—	—	—	—	—	—	(0) EUR	(0) EUR	—	—	—	—	—	573,000 EUR	—	—	—	—	—	573,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	52 107 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	52 107 EUR	—	—	—	—	—	—	—	—	—	—	51 421 EUR	—	—	—	—	—	—	—	—	—	—	—	—	51 421 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	111,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	111,000 EUR	—	—	—	—	—	—	—	—	—	—	532,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	532,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	636,000 EUR	636,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	683,000 EUR	—	—	—	683,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	—	—	—	—	—	—	—	—	—	1,000 EUR	—	—	—	—	—	—	—	—	(0) EUR	—	—	—	—	—	—	—	—	—	282,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	282,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	19 186 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	19 186 EUR	—	—	—	—	—	—	—	—	—	—	28 376 EUR	—	—	—	—	—	—	—	—	—	—	—	—	28 376 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—