v3.26.1
Investments accounted for using equity method - Schedule of Financial Information of Joint Ventures (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current assets [abstract]        
Cash and cash equivalents € 1,075 € 3,521 € 2,907 € 1,047
Total current assets 2,240 4,302    
Non-current assets 11,130 6,025    
Current liabilities [abstract]        
Total current liabilities 2,571 1,522    
Non-current liabilities [abstract]        
Other non-current liabilities 35 41    
Total non-current liabilities 8,085 5,313    
Reconciliation To Carrying Amounts [Abstract]        
Profit for the period (94) 27 (904)  
Other comprehensive income (419) 204 (169)  
Revenue 2,627 2,001 2,030  
Interest income 91 127 51  
Income tax expense (21) 55 176  
Profit for the period (94) 27 (904)  
Other comprehensive income (419) 204 (169)  
Total comprehensive income (513) 231 € (1,073)  
Horizons-3 Satellite LLC [Member]        
Current assets [abstract]        
Cash and cash equivalents 0      
Other current assets 5      
Total current assets 5      
Non-current assets 200      
Current liabilities [abstract]        
Financial liabilities (excluding trade payables) 0      
Other current liabilities 2      
Total current liabilities 2      
Non-current liabilities [abstract]        
Financial liabilities (excluding trade payables) 21      
Other non-current liabilities 0      
Total non-current liabilities 21      
Net assets 182 189    
Reconciliation To Carrying Amounts [Abstract]        
Opening net assets 189      
Profit for the period 1      
Other comprehensive income 0      
Contributions 15      
Dividends paid 0      
Foreign exchange differences (23)      
Closing net assets 182 189    
Revenue 31      
Interest income 0      
Depreciation and amortisation (20)      
Interest expense (3)      
Income tax expense 0      
Profit for the period 1      
Other comprehensive income 0      
Total comprehensive income 1      
Dividends received from associates and joint venture entities 0      
Horizons-4 Satellite LLC [Member]        
Current assets [abstract]        
Cash and cash equivalents 1      
Other current assets 0      
Total current assets 1      
Non-current assets 38      
Current liabilities [abstract]        
Financial liabilities (excluding trade payables) 0      
Other current liabilities 0      
Total current liabilities 0      
Non-current liabilities [abstract]        
Financial liabilities (excluding trade payables) 0      
Other non-current liabilities 0      
Total non-current liabilities 0      
Net assets 39 50    
Reconciliation To Carrying Amounts [Abstract]        
Opening net assets 50      
Profit for the period 0      
Other comprehensive income 0      
Contributions 0      
Dividends paid (5)      
Foreign exchange differences (6)      
Closing net assets 39 € 50    
Revenue 4      
Interest income 0      
Depreciation and amortisation (2)      
Interest expense 0      
Income tax expense 0      
Profit for the period 0      
Other comprehensive income 0      
Total comprehensive income 0      
Dividends received from associates and joint venture entities € 2