Employee benefit obligations - Schedule of amounts recognized for Intelsat's postretirement benefit plan (Detail) - EUR (€) € in Millions |
5 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Jul. 17, 2025 |
Jul. 16, 2025 |
|
| Disclosure Of Amounts Recognized In Postretirement Benefit Plan Of Intelsat [Line Items] | |||||
| Beginning balance | € 14 | € 14 | |||
| Interest expense | € 6 | ||||
| Total amount recognized in profit or loss | 0 | ||||
| Remeasurements | |||||
| Effects of changes in financial assumptions | 8 | ||||
| Experience losses | 4 | ||||
| Remeasurements of post-employment benefit obligation, net of tax | 5 | € (7) | € (1) | ||
| Intelsat Postretirement Benefit Plan [Member] | |||||
| Disclosure Of Amounts Recognized In Postretirement Benefit Plan Of Intelsat [Line Items] | |||||
| Beginning balance | € 18 | € 18 | |||
| Current service cost | 0 | ||||
| Interest expense | 0 | ||||
| Total amount recognized in profit or loss | 0 | ||||
| Remeasurements | |||||
| Effects of changes in financial assumptions | 0 | ||||
| Experience losses | (1) | ||||
| Remeasurements of post-employment benefit obligation, net of tax | € (1) | ||||