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Acquisitions - Schedule of Intangible Assets (Details)
$ in Millions
12 Months Ended
Aug. 01, 2022
USD ($)
May 02, 2022
USD ($)
Apr. 01, 2022
USD ($)
Dec. 31, 2022
USD ($)
Entel Chile        
Business Acquisition [Line Items]        
Fair Value       $ 153
Entel Peru        
Business Acquisition [Line Items]        
Fair Value       10
MainOne        
Business Acquisition [Line Items]        
Fair Value       $ 55
Customer relationships | Entel Chile        
Business Acquisition [Line Items]        
Fair Value   $ 153    
Weighted-average Estimated Useful Lives (Years)   14 years    
Customer relationships | Entel Chile | Minimum        
Business Acquisition [Line Items]        
Estimated Useful Lives (Years)   12 years    
Customer relationships | Entel Chile | Maximum        
Business Acquisition [Line Items]        
Estimated Useful Lives (Years)   15 years    
Customer relationships | Entel Chile | Discount Rate | Minimum        
Business Acquisition [Line Items]        
Discount Rate   0.085    
Customer relationships | Entel Chile | Discount Rate | Maximum        
Business Acquisition [Line Items]        
Discount Rate   0.095    
Customer relationships | Entel Peru        
Business Acquisition [Line Items]        
Fair Value $ 10      
Estimated Useful Lives (Years) 15 years      
Weighted-average Estimated Useful Lives (Years) 15 years      
Customer relationships | Entel Peru | Discount Rate        
Business Acquisition [Line Items]        
Discount Rate 0.070      
Customer relationships | MainOne        
Business Acquisition [Line Items]        
Fair Value     $ 52  
Weighted-average Estimated Useful Lives (Years)     14 years  
Customer relationships | MainOne | Minimum        
Business Acquisition [Line Items]        
Estimated Useful Lives (Years)     10 years  
Customer relationships | MainOne | Maximum        
Business Acquisition [Line Items]        
Estimated Useful Lives (Years)     15 years  
Customer relationships | MainOne | Discount Rate        
Business Acquisition [Line Items]        
Discount Rate     0.115  
Trade names | MainOne        
Business Acquisition [Line Items]        
Fair Value     $ 3  
Estimated Useful Lives (Years)     5 years  
Weighted-average Estimated Useful Lives (Years)     5 years  
Trade names | MainOne | Discount Rate        
Business Acquisition [Line Items]        
Discount Rate     0.115  
Trade names | MainOne | Royalty Method, Royalty Rate        
Business Acquisition [Line Items]        
Discount Rate     0.010