Debt - Narrative (Detail)	1 Months Ended										12 Months Ended
	Jan. 31, 2025 USD ($) series	Dec. 31, 2024 USD ($)	Oct. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Aug. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Apr. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jan. 31, 2024 USD ($)	Dec. 31, 2021 agreement	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Feb. 29, 2024 USD ($)
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt											$ 15,600,000,000	$ 8,600,000,000
Repayments of debt and capital lease obligations											20,300,000,000	10,600,000,000
Repayments of debt											4,688,000,000
Facility Capacity		$ 22,000,000,000									22,000,000,000
Principal Amount Outstanding		5,441,000,000									5,441,000,000
Value of purchase assets financed											3,300,000,000	3,800,000,000
Less long-term debt maturing within one year		22,568,000,000									22,568,000,000	12,973,000,000
Gain (loss) on debt extinguishment											385,000,000	308,000,000	$ (1,100,000,000)
Subsequent event
Debt Instrument [Line Items]
Debt instrument, number of notes | series	2
Verizon revolving credit facility
Debt Instrument [Line Items]
Amount drawn from credit facilities											0
Facility Capacity		12,000,000,000						$ 12,000,000,000			12,000,000,000			$ 9,500,000,000
Principal Amount Outstanding		0									0
Alternative Financing Facility | Network Equipment
Debt Instrument [Line Items]
Value of purchase assets financed											1,600,000,000	1,300,000,000	$ 832,000,000
Less long-term debt maturing within one year		2,500,000,000									2,500,000,000	2,200,000,000
Asset-Backed Debt
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt											12,400,000,000	6,600,000,000
Repayments of debt											8,500,000,000	4,400,000,000
Secured debt, carrying value		26,100,000,000									26,100,000,000
Green Bond
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt											1,000,000,000	1,000,000,000
Commercial Paper
Debt Instrument [Line Items]
Proceeds from commercial paper											27,500,000,000
Repayments of short-term debt											27,500,000,000
Commercial paper, amount outstanding		0									0
Asset Backed Notes
Debt Instrument [Line Items]
Principal Amount Issued		6,923,000,000									6,923,000,000
Asset Backed Notes | Subsequent event
Debt Instrument [Line Items]
Repayments of debt	$ 800,000,000
Principal Amount Issued	$ 1,100,000,000
Asset Backed Notes | Subsequent event | Minimum
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.74%
Asset Backed Notes | Subsequent event | Maximum
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	4.97%
Asset Backed Notes | Senior asset-backed notes
Debt Instrument [Line Items]
Repayments of debt											$ 4,500,000,000	$ 3,700,000,000
Asset Backed Notes | Senior asset-backed notes | Term Two
Debt Instrument [Line Items]
Debt revolving period											2 years
Asset Backed Notes | Senior asset-backed notes | Term Three
Debt Instrument [Line Items]
Debt revolving period											3 years
Asset Backed Notes | Senior asset-backed notes | Term Four
Debt Instrument [Line Items]
Debt revolving period											5 years
2021 ABS Financing Facility
Debt Instrument [Line Items]
Repayments of debt				$ 950,000,000			$ 900,000,000		$ 900,000,000
Amount drawn from credit facilities		650,000,000	$ 1,600,000,000	$ 450,000,000	$ 1,200,000,000	$ 225,000,000		$ 600,000,000
Number of loan agreements | agreement										2
Outstanding balance		8,000,000,000									$ 8,000,000,000
2022 ABS Financing Facility | Senior asset-backed notes
Debt Instrument [Line Items]
Amount drawn from credit facilities		$ 1,000,000,000				$ 1,100,000,000
Debt revolving period		1 year
Outstanding balance		$ 5,000,000,000									5,000,000,000
Guarantee of Debentures of Operating Telephone Company Subsidiaries
Debt Instrument [Line Items]
Principal amount outstanding in connection with the guarantee of debt obligations		$ 614,000,000									$ 614,000,000