v3.26.1
Non-controlling interests - Schedule of Financial Information of Non Controlling interests (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of subsidiaries [line items]      
Current assets € 2,240 € 4,302  
Current liabilities (2,571) (1,522)  
Non-current assets 11,130 6,025  
Non-current liabilities (8,085) (5,313)  
Accumulated NCI 91 69  
Revenue 2,627 2,001 € 2,030
Profit/(loss) for the period (94) 27 (904)
Other comprehensive income (419) 204 (169)
Total comprehensive (loss)/income for the year, net of tax (513) 231 (1,073)
Profit/(loss) allocated to NCI 1 12 1
Cash flows from/(absorbed by) operating activities 908 1,006 3,479
Cash flows from/(absorbed by) investing activities (1,665) (159) (370)
Cash flows from/(absorbed by) financing activities (1,361) (375) (1,126)
Net foreign exchange movements (328) 142 (123)
Increase / (decrease) in cash position (2,446) 614 1,860
Horizons holdings [Member]      
Disclosure of subsidiaries [line items]      
Current assets 38    
Current liabilities (34)    
Current net (liabilities)/assets 4    
Non-current assets 116    
Non-current liabilities (17)    
Non-current net assets 99    
Net assets 103    
Accumulated NCI 52    
Transactions with non-controlling interests 0    
LuxGovSat S.A.      
Disclosure of subsidiaries [line items]      
Current assets 23 4  
Current liabilities (25) (2)  
Current net (liabilities)/assets (2) 2  
Non-current assets 131 14  
Non-current liabilities (34) (1)  
Non-current net assets 97 13  
Net assets 95 15  
Accumulated NCI 48 10  
Al Maisan Satellite Communications LLC, UAE      
Disclosure of subsidiaries [line items]      
Current assets   4  
Current liabilities   (2)  
Current net (liabilities)/assets   2  
Non-current assets   24  
Non-current net assets   24  
Net assets   26  
Accumulated NCI   17  
Revenue 8 10 7
Operating expenses (4) (4) (4)
Profit/(loss) for the period (1) 2 0
Other comprehensive income 0 0 0
Total comprehensive (loss)/income for the year, net of tax (1) 2 0
Profit/(loss) allocated to NCI (1) 1 0
Dividends paid to non-controlling interests 0 0 0
Cash flows from/(absorbed by) operating activities 5 6 5
Cash flows from/(absorbed by) investing activities 0 0 0
Cash flows from/(absorbed by) financing activities (5) (6) (12)
Net foreign exchange movements 0 0 (1)
Increase / (decrease) in cash position 0 0 (8)
LuxGovSat [Member]      
Disclosure of subsidiaries [line items]      
Revenue 44 38 31
Operating expenses (13) (12) (12)
Profit/(loss) for the period 4 9 4
Other comprehensive income 0 0 0
Total comprehensive (loss)/income for the year, net of tax 4 9 4
Profit/(loss) allocated to NCI 2 4 2
Dividends paid to non-controlling interests 0 0 0
Cash flows from/(absorbed by) operating activities 32 37 16
Cash flows from/(absorbed by) investing activities (7) 0 0
Cash flows from/(absorbed by) financing activities (25) (37) (16)
Net foreign exchange movements 0 0 0
Increase / (decrease) in cash position € 0 € 0 € 0