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Equity and Accumulated Other Comprehensive Loss - Changes in AOCI (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     $ 92,463  
Other comprehensive income (loss) attributable to Verizon $ 493 $ (380) 437 $ (773)
Ending balance 99,088 88,783 99,088 88,783
Accumulated Other Comprehensive Loss        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance (1,921) (1,320) (1,865) (927)
Other comprehensive income (loss)     (32)  
Amounts reclassified to net income     (167)  
Other comprehensive income (loss) attributable to Verizon 493 (380) 437 (773)
Ending balance (1,428) $ (1,700) (1,428) $ (1,700)
Foreign  currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     (698)  
Other comprehensive income (loss)     (31)  
Other comprehensive income (loss) attributable to Verizon     (31)  
Ending balance (729)   (729)  
Unrealized gain (loss) on cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     (1,150)  
Other comprehensive income (loss)     4  
Amounts reclassified to net income     63  
Other comprehensive income (loss) attributable to Verizon     67  
Ending balance (1,083)   (1,083)  
Unrealized gain (loss) on fair value hedges        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     (431)  
Other comprehensive income (loss)     636  
Amounts reclassified to net income     (61)  
Other comprehensive income (loss) attributable to Verizon     575  
Ending balance 144   144  
Unrealized gain (loss) on marketable securities        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     (9)  
Other comprehensive income (loss)     (5)  
Amounts reclassified to net income     2  
Other comprehensive income (loss) attributable to Verizon     (3)  
Ending balance (12)   (12)  
Defined benefit pension and postretirement plans        
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]        
Beginning balance     423  
Amounts reclassified to net income     (171)  
Other comprehensive income (loss) attributable to Verizon     (171)  
Ending balance $ 252   $ 252