Debt - Schedule of Long-term Debt Obligations (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Schedule of Capitalization, Long-term Debt [Line Items]
Finance lease obligations	$ 2,511	$ 2,511	$ 2,349
Unamortized discount, net of premium	(3,463)	(3,463)	(3,604)
Unamortized debt issuance costs	(619)	(619)	(558)
Total long-term debt, including current maturities	157,709	157,709	143,949
Less long-term debt maturing within one year	18,177	18,177	22,568
Total long-term debt	139,532	139,532	121,381
Add short-term vendor financing arrangements	441	441	65
Debt maturing within one year	18,618	18,618	22,633
Total debt	$ 158,150	$ 158,150	$ 144,014
Debt instrument, percentage points added to the reference rate	3.94%
Finance Lease, Liability
Schedule of Capitalization, Long-term Debt [Line Items]
Finance lease obligations average rate	5.00%	5.00%	4.80%
Vendor Financing Arrangements
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 16	$ 16	$ 85
Floating Rate, Maturities Less Than 5 Years And 5 To 10 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, percentage points added to the reference rate		3.943%
Floating Rate, Maturities Less Than 5 Years And 5 To 10 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, percentage points added to the reference rate		4.869%
Verizon Communications \| Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 29,192	$ 29,192	29,325
Verizon Communications \| Maturities Less Than 5 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	0.85%	0.85%
Verizon Communications \| Maturities Less Than 5 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	7.75%	7.75%
Verizon Communications \| Maturities 5 To 10 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 39,769	$ 39,769	33,851
Verizon Communications \| Maturities 5 To 10 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	1.13%	1.13%
Verizon Communications \| Maturities 5 To 10 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	7.88%	7.88%
Verizon Communications \| Maturities Greater Than 10 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 60,471	$ 60,471	52,719
Verizon Communications \| Maturities Greater Than 10 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	1.13%	1.13%
Verizon Communications \| Maturities Greater Than 10 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	8.95%	8.95%
Verizon Communications \| Floating Rate, Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 1,373	$ 1,373	1,171
Verizon Communications \| Floating Rate, Maturities 5 To 10 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 647	$ 647	1,735
Alltel Corporation \| Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	6.80%	6.80%
Long-term debt, gross	$ 38	$ 38	38
Alltel Corporation \| Maturities 5 To 10 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 56	$ 56	56
Alltel Corporation \| Maturities 5 To 10 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	7.88%	7.88%
Operating telephone company subsidiaries—debentures \| Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 317	$ 317	286
Operating telephone company subsidiaries—debentures \| Maturities Less Than 5 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	6.00%	6.00%
Operating telephone company subsidiaries—debentures \| Maturities Less Than 5 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	8.38%	8.38%
Operating telephone company subsidiaries—debentures \| Maturities 5 To 10 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 297	$ 297	328
Operating telephone company subsidiaries—debentures \| Maturities 5 To 10 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	5.13%	5.13%
Operating telephone company subsidiaries—debentures \| Maturities 5 To 10 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	8.75%	8.75%
Other subsidiaries – asset-backed debt \| Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 18,247	$ 18,247	16,363
Other subsidiaries – asset-backed debt \| Maturities Less Than 5 Years \| Minimum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	1.53%	1.53%
Other subsidiaries – asset-backed debt \| Maturities Less Than 5 Years \| Maximum
Schedule of Capitalization, Long-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	6.09%	6.09%
Other subsidiaries – asset-backed debt \| Floating Rate, Maturities Less Than 5 Years
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, gross	$ 8,857	$ 8,857	$ 9,805

Amount of debt and lease obligation, classified as current.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt discount (premium).

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Weighted average interest rate of debt outstanding.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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