v3.26.1
Employee benefit obligations - Schedule of amounts recognized in the consolidated income statement (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 Legacy Intelsat Staff Retirement Plan And Restoration Plans [Line Items]          
Beginning balance       € 14 € 14
Interest expense € 6        
Interest (income) (6)        
Total amount recognized in profit or loss 0        
Remeasurements          
Effects of changes in financial assumptions 8        
Experience losses 4        
Return on plan assets (excluding interest income) (7)        
Remeasurements of post-employment benefit obligation, net of tax 5 € (7) € (1)    
Staff Retirement Plan And Restoration Plans [Member]          
Disclosure Of Legacy Intelsat Staff Retirement Plan And Restoration Plans [Line Items]          
Beginning balance       265 265
Interest expense 6        
Total amount recognized in profit or loss 6        
Remeasurements          
Effects of changes in financial assumptions 8        
Experience losses 4        
Return on plan assets (excluding interest income) (7)        
Remeasurements of post-employment benefit obligation, net of tax 5        
Fair Value Of Plan Assets [Member]          
Disclosure Of Legacy Intelsat Staff Retirement Plan And Restoration Plans [Line Items]          
Beginning balance       € (251) € (251)
Interest (income) (6)        
Total amount recognized in profit or loss (6)        
Remeasurements          
Effects of changes in financial assumptions 0        
Experience losses 0        
Return on plan assets (excluding interest income) 0        
Remeasurements of post-employment benefit obligation, net of tax € 0