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Wireless Licenses, Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Roll Forward]        
Beginning balance   $ 28,671 $ 28,603  
Acquisitions   35 100  
Verizon Business Group goodwill impairment $ (5,800) (5,841) 0 $ 0
Reclassifications, adjustments and other   (22) (32)  
Ending balance 22,843 22,843 28,671 28,603
Goodwill accumulated impairment 5,900 5,900 16  
Selling, general and administrative expense        
Goodwill [Roll Forward]        
Verizon Business Group goodwill impairment   (27) (16)  
Business        
Goodwill [Roll Forward]        
Goodwill accumulated impairment 5,800 5,800    
Operating Segments | Consumer        
Goodwill [Roll Forward]        
Beginning balance   21,142 21,042  
Acquisitions   35 100  
Verizon Business Group goodwill impairment   0    
Reclassifications, adjustments and other   0 0  
Ending balance 21,177 21,177 21,142 21,042
Operating Segments | Business        
Goodwill [Roll Forward]        
Beginning balance   7,502 7,515  
Acquisitions   0 0  
Verizon Business Group goodwill impairment   (5,841)    
Reclassifications, adjustments and other   5 (13)  
Ending balance 1,666 1,666 7,502 7,515
Other        
Goodwill [Roll Forward]        
Beginning balance   27 46  
Acquisitions   0 0  
Verizon Business Group goodwill impairment   0    
Reclassifications, adjustments and other   (27) (19)  
Ending balance 0 0 $ 27 $ 46
Goodwill accumulated impairment $ 43 $ 43