Employee benefit obligations - Schedule of change in the defined benefit obligation (Detail) € in Millions |
5 Months Ended |
|---|---|
|
Dec. 31, 2025
EUR (€)
| |
| Disclosure Of Changes In Defined Benefit Obligation Of postretirement benefit plan [Line Items] | |
| Defined benefit plan start period | € 14 |
| Benefit payments from the plan | 0 |
| Remeasurements financial assumptions | 9 |
| Experience adjustments | 4 |
| Interest expense | 6 |
| Defined benefit plan end period | 18 |
| Intelsat Postretirement Benefit Plan [Member] | |
| Disclosure Of Changes In Defined Benefit Obligation Of postretirement benefit plan [Line Items] | |
| Defined benefit plan start period | 18 |
| Benefit payments from the plan | 0 |
| Benefit payments from the employer | (1) |
| Admin expenses paid from plan assets | 0 |
| Remeasurements financial assumptions | 0 |
| Experience adjustments | (1) |
| Interest expense | 1 |
| Defined benefit plan end period | € 17 |