v3.26.1
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)