v3.26.3
Basis of Presentation (Details)
$ in Millions
9 Months Ended
Sep. 30, 2026
USD ($)
market
country
segment
Oct. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Basis of Presentation [Line Items]      
Number of reportable segments | segment 2    
Principal amount redeemed $ 8,506.4   $ 8,349.8
2027 LPR Senior Secured Notes | Line of Credit | Subsequent Event      
Basis of Presentation [Line Items]      
Principal amount redeemed   $ 1,161.0  
Debt instrument, covenant, equity interest owed to creditor   1  
Residential and Business-to-Business Services      
Basis of Presentation [Line Items]      
Number of countries in which entity provides services (over) | country 20    
Wholesale Communication Services | Cable & Wireless Communications Limited (C&W)      
Basis of Presentation [Line Items]      
Number of markets (over) | market 30    
Telefónica Costa Rica. C&W      
Basis of Presentation [Line Items]      
Percentage ownership of subsidiaries (less than) 100.00%