Assets in the course of construction - Schedule of Assets in the Course of Construction (Parenthetical) (Detail) - EUR (€) € in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Assets In The Course Of Construction [Line Items] | ||
| Transfer Of Assets In The Course Of Construction Impairment Booked | € 434 | |
| Addition On Assets In Course Of Construction For C Band Reimbursable Space Segment Cost | € 36 | |
| Addition On Assets In Course Of Construction For Ground Segment Cost | € 2 | |