v3.26.1
Deferred tax balances - Additional Information (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Jul. 17, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Net Deferred Tax Assets Tax Losses Carried Forward In Luxembourg € 9,200 € 53 € 35 € 370
Deferred Tax Assets Remaining Tax Losses Recoverable   575 627 608
Net Deferred Tax Assets Tax Losses Carried Forward In Germany   26 24 20
Net Deferred Tax Assets Tax Losses Carried Forward In United States 379 125 3 20
Deferred Tax Assets Tax Losses Arose   10,100 578 305
Deferred Tax Assets Tax Losses Arose In United State   797 456 193
Deferred Tax Assets Tax Losses Arose In Israel   92 88 86
Deferred Tax Assets Tax Losses Arose In Ghana   23 15 8
Investment In Tax Credit 180 8 14 6
Net Deferred Tax Assets Tax Losses Carried Forward € 9,600      
Increase (decrease) through net exchange differences, deferred tax liability (asset)   17 3 € 8
Deferred Tax Assets For Interest Expense Carried Forward   37 € 0  
Interest Carried Forward   12    
Intelsat Luxembourg Unity [Member]        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Tax effect of tax losses   8,800    
Luxembourg Entity [Member]        
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]        
Tax effect of tax losses   € 453