XML 307 R288.htm IDEA: XBRL DOCUMENT v3.25.0.1
Operations Classified as Held for Sale - Narrative (Details) - EUR (€)
€ in Millions
12 Months Ended
Nov. 08, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jul. 06, 2023
Disclosure of subsidiaries [line items]          
Transfers and others   € 104 € (170)    
Goodwill impairment   € 866 58 € 0  
Daytona Midco, S.L. (Nabiax)          
Disclosure of subsidiaries [line items]          
Proportion of ownership interest in associate (as a percent) 20.00% 20.00%      
Fiber optic assets in Peru          
Disclosure of subsidiaries [line items]          
Transfers and others   € 118 € (163)    
Goodwill impairment   34      
Pangea          
Disclosure of subsidiaries [line items]          
Impairment loss, property, plant and equipment   108      
Reversal of deferred tax assets   € 13      
Telefónica Hispam | Affiliate Of Kohlberg Kravis Roberts          
Disclosure of subsidiaries [line items]          
Percentage of voting equity interests acquired         54.00%
Telefónica Hispam | Entel Perú          
Disclosure of subsidiaries [line items]          
Percentage of voting equity interests acquired         10.00%
Asterion Industrial Partners SGEIC | Aermont Group | Nabiax          
Disclosure of subsidiaries [line items]          
Percentage of share capital sold 80.00%