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Debt - Issuances and Commercial Paper Program (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2025	Sep. 30, 2024
Short-term Debt [Line Items]
Net Proceeds	$ 2,276,000,000	$ 1,676,000,000	$ 3,952,000,000
Pension
Short-term Debt [Line Items]
Employer discretionary contribution amount	$ 563,000,000		$ 563,000,000	$ 365,000,000
Verizon 5.250% Notes Due 2035
Short-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	5.25%	5.25%	5.25%
Principal Amount Issued	$ 2,300,000,000	$ 2,250,000,000	$ 2,300,000,000
Net Proceeds		$ 1,676,000,000
Verizon 3.250% notes due 2032
Short-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	3.25%		3.25%
Principal Amount Issued	$ 1,000,000,000		$ 1,000,000,000
Net Proceeds	$ 1,142,000,000
Verizon 3.750% notes due 2037
Short-term Debt [Line Items]
Debt instrument, interest rate, stated percentage	3.75%		3.75%
Principal Amount Issued	$ 1,000,000,000		$ 1,000,000,000
Net Proceeds	1,134,000,000
Commercial Paper
Short-term Debt [Line Items]
Commercial paper issued			11,600,000,000
Repayments of short-term debt			11,600,000,000
Commercial paper	$ 0		$ 0