Statement Of Changes In Equity [Abstract]

Alten - Filing #2813158

Concept	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 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	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2021-01-01 to 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	As at 2021-12-31	2021-01-01 to 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	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	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	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	1 838 618 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	3,000 EUR	238,000 EUR	42,000 EUR	—	—	8 728 EUR	207 837 EUR	—	—	1 421 056 EUR	—	1 120 271 EUR	—	3,000 EUR	53,000 EUR	—	—	—	5 700 EUR	427,000 EUR	—	—	60 250 EUR	36 099 EUR	1 421 427 EUR	371,000 EUR	—	484,000 EUR	1 213 604 EUR	35 953 EUR	1 043 949 EUR	224,000 EUR	98 011 EUR	15 489 EUR	9 070 EUR	7,000 EUR	60 250 EUR	267,000 EUR
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	—	—	457 525 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	207 889 EUR	—	—	—	—	—	—	—	—	—	—	—
Comprehensive income	—	—	—	438 525 EUR	—	48,000 EUR	42,000 EUR	—	6,000 EUR	8 205 EUR	—	—	—	—	—	—	457 567 EUR	438 567 EUR	—	—	—	—	10 796 EUR	49,000 EUR	—	—	—	223 945 EUR	—	207 837 EUR	—	5 080 EUR	—	—	53,000 EUR	4,000 EUR	—	—	—	21 188 EUR	—	—	—	—	—	223 994 EUR	—	—	—	—	—	—	—	—	—	—	—
Issue of equity	—	—	207,000 EUR	—	—	0 EUR	—	—	—	207,000 EUR	—	—	—	—	—	—	—	0 EUR	—	—	—	—	—	0 EUR	—	—	—	0 EUR	—	—	—	146,000 EUR	—	—	—	—	—	—	—	—	146,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	—	—	—	—	—	—	—	—	—	44 390 EUR	—	—	—	—	—	—	—	44 390 EUR	—	—	—	—	—	—	—	—	—	33 875 EUR	—	—	—	33 875 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through other changes, equity	—	—	—	—	—	—	—	—	—	1 665 EUR	—	—	—	—	—	—	—	1 665 EUR	—	—	—	—	—	—	—	—	—	83,000 EUR	—	—	—	83,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through treasury share transactions, equity	—	935,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	935,000 EUR	—	—	—	—	—	—	—	—	341,000 EUR	341,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity	—	—	—	—	—	136,000 EUR	—	136,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	64,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	64,000 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	—	—	—	—	—	—	—	—	25 897 EUR	—	—	—	—	—	—	—	25 897 EUR	—	—	—	—	—	—	—	—	—	17 494 EUR	—	—	—	17 494 EUR	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—