Equity and Accumulated Other Comprehensive Loss - Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 100,575
Other comprehensive income (loss) attributable to Verizon	(566)	$ 181
Ending balance	102,037	95,726
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(923)	(1,380)
Other comprehensive income	68
Amounts reclassified to net income	2
Other comprehensive income (loss) attributable to Verizon	(566)	181
Ending balance	(1,489)	$ (1,199)
Foreign  currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(733)
Other comprehensive income	67
Other comprehensive income (loss) attributable to Verizon	67
Ending balance	(666)
Unrealized gain (loss) on cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(981)
Amounts reclassified to net income	21
Other comprehensive income (loss) attributable to Verizon	21
Ending balance	(960)
Unrealized gain (loss) on fair value hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	589
Other comprehensive income	(636)
Amounts reclassified to net income	(17)
Other comprehensive income (loss) attributable to Verizon	(653)
Ending balance	(64)
Unrealized gain (loss) on marketable securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(5)
Other comprehensive income	1
Other comprehensive income (loss) attributable to Verizon	1
Ending balance	(4)
Defined benefit pension and postretirement plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	207
Amounts reclassified to net income	(2)
Other comprehensive income (loss) attributable to Verizon	(2)
Ending balance	$ 205