v3.26.1
Leases - Additional Information (Detail) - EUR (€)
€ in Millions
 1 Months Ended 12 Months Ended
Oct. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Leases [Line Items]        
Operating lease income   € 56 € 49 € 22
Weighted average in cremental borrowing rate     2.97%  
Additions to right-of-use assets   682 € 39  
Disposals, right-of-use assets   32 35  
Depreciation, right-of-use assets   € 62 25 19
Lease term description   The leases of office buildings typically run for a period of 2-10 years and leases of ground segment assets for a period of 2-15 years    
Cash outflow for leases   € 60 26  
Non-current finance lease receivables   13    
Selling profit (loss) on finance leases € 1 (1) 5 0
Acquisitions through business combinations, right-of-use assets   643    
Lease liabilities   635 51  
Non-current lease liabilities   559 32  
Current lease liabilities   76 19  
Revenue Recognised Over Time [Member]        
Disclosure Of Leases [Line Items]        
Operating lease income   51 49 € 22
Intelsat Holdings S.à r.l. [Member]        
Disclosure Of Leases [Line Items]        
Lease liabilities   621    
Intelsat Acquisition [Member]        
Disclosure Of Leases [Line Items]        
Increase in finance lease receivables from business combination   15 € 15  
Non-current finance lease receivables   12    
Current finance lease receivables   3    
Non-current lease liabilities   560    
Current lease liabilities   € 61    
Bottom of range [member]        
Disclosure Of Leases [Line Items]        
Weighted average in cremental borrowing rate   3.14%    
Top of range [member]        
Disclosure Of Leases [Line Items]        
Weighted average in cremental borrowing rate   6.29%