v3.26.1
Leases - Schedule Of Quantitative Information About Right-Of-Use Assets (Detail) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets € 646 € 50
Buildings [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 94 17
Transponders [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 423 17
Ground segment [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 128 15
Other fixtures and fittings, tools and equipment [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 1 1
Gross carrying amount [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 720 86
Gross carrying amount [member] | Buildings [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 110 32
Gross carrying amount [member] | Transponders [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 455 27
Gross carrying amount [member] | Ground segment [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 153 25
Gross carrying amount [member] | Other fixtures and fittings, tools and equipment [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 2 2
Accumulated impairment [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets (74) (36)
Accumulated impairment [member] | Buildings [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets (16) (15)
Accumulated impairment [member] | Transponders [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets (32) (10)
Accumulated impairment [member] | Ground segment [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets (25) (10)
Accumulated impairment [member] | Other fixtures and fittings, tools and equipment [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets € (1) € (1)