v3.26.1
Business combinations - Additional Information (Detail) - Intelsat Holdings S.à r.l. [Member]
€ in Millions, $ in Millions
5 Months Ended 12 Months Ended
Jul. 17, 2025
USD ($)
Jul. 17, 2025
EUR (€)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Jul. 17, 2025
EUR (€)
Disclosure of detailed information about business combination [line items]              
Cash transferred $ 2,600   € 2,223 [1]   € 2,223 [1]   € 2,200
Contingent consideration percentage of net proceeds 0.425 0.425          
Fair value of acquired receivables             427
Best estimate at acquisition date of contractual cash flows not expected to be collected for acquired receivables             22
Revenue of acquiree since acquisition date     721        
Profit (loss) of acquiree since acquisition date     7        
Revenue of combined entity as if combination occurred at beginning of period         3,512    
Profit (loss) of combined entity as if combination occurred at beginning of period         202    
Borrowings recognised as of acquisition date     € 2,631,000   2,631,000    
Contingent value rights fair value $ 855 € 737   $ 887 € 755    
Closing foreign exchange rate     1.175   1.175    
Fair value increase on contingent value rights         € 28    
Tax paid on behalf of contingent value rights holders         6    
Contingent value rights liability net         € 749    
sensitivity analysis auction price per mhz pop     0.01   0.01    
Sensitivity analysis impact on cvr liability         € 10    
Exchange rate applied on acquisition     1.1602   1.1602    
Satellites acquired fair value             1,571
Orbital slots acquired fair value             242
Contingent liability regulatory fees current     € 83   € 83   € 5
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination           € 55  
[1] At the transaction exchange rate of USD 1.1602