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Segment Information - Reconciliation of Total Reportable Segments Operating Income to Consolidated Income before Provision for Income Taxes (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]        
Operating Income   $ 22,877 $ 30,467 $ 32,448
Severance charges   (533) (304) (209)
Other components of net periodic pension and benefit charges   (248) (387) (769)
Verizon Business Group goodwill impairment $ (5,800) (5,841) 0 0
Asset rationalization   (480) 0 0
Non-strategic business shutdown   (179) 0 0
Business transformation costs   (176) 0 0
Legal settlement   (100) 0 0
Loss on spectrum licenses   0 0 (223)
Net gain from disposition of business   0 0 706
Equity in earnings (losses) of unconsolidated businesses   (53) 44 145
Other income (expense), net   (313) 1,373 312
Interest expense   (5,524) (3,613) (3,485)
Income Before Provision For Income Taxes   16,987 28,271 29,420
Operating Segments        
Segment Reporting Information [Line Items]        
Operating Income   31,077 31,477 33,392
Corporate and other        
Segment Reporting Information [Line Items]        
Operating Income   $ (643) $ (319) $ (449)