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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, 2024
Dec. 31, 2023
Dec. 31, 2022
Goodwill [Roll Forward]        
Beginning balance   $ 22,843 $ 28,671  
Acquisitions     35  
Verizon Business Group goodwill impairment $ (5,800) 0 (5,841) $ 0
Reclassifications, adjustments and other   (2) (22)  
Ending balance 22,843 22,841 22,843 28,671
Goodwill accumulated impairment 5,900   5,900 16
Selling, general and administrative expense        
Goodwill [Roll Forward]        
Verizon Business Group goodwill impairment     (27)  
Business        
Goodwill [Roll Forward]        
Goodwill accumulated impairment 5,800   5,800  
Operating Segments | Consumer        
Goodwill [Roll Forward]        
Beginning balance   21,177 21,142  
Acquisitions     35  
Verizon Business Group goodwill impairment     0  
Reclassifications, adjustments and other   0 0  
Ending balance 21,177 21,177 21,177 21,142
Operating Segments | Business        
Goodwill [Roll Forward]        
Beginning balance   1,666 7,502  
Acquisitions     0  
Verizon Business Group goodwill impairment     (5,841)  
Reclassifications, adjustments and other   (2) 5  
Ending balance 1,666 1,664 1,666 7,502
Segment Reporting, Reconciling Item, Corporate Nonsegment        
Goodwill [Roll Forward]        
Beginning balance   0 27  
Acquisitions     0  
Verizon Business Group goodwill impairment     0  
Reclassifications, adjustments and other   0 (27)  
Ending balance 0 $ 0 0 $ 27
Goodwill accumulated impairment $ 43   $ 43