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Debt - Exchange Offers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2025
Debt Instrument [Line Items]
Principal Amount Exchanged		$ 2,207	$ 2,207
Principal Amount Issued		$ 2,162	2,162
Debt instrument, unamortized premium	$ 45		$ 45
Verizon 1.450%-7.750% Notes Due 2026-2030
Debt Instrument [Line Items]
Principal Amount Exchanged	2,207
Principal Amount Issued	$ 0
Verizon 1.450%-7.750% Notes Due 2026-2030 | Minimum
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	1.45%		1.45%
Verizon 1.450%-7.750% Notes Due 2026-2030 | Maximum
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	7.75%		7.75%
Verizon 5.401% notes due 2037
Debt Instrument [Line Items]
Principal Amount Exchanged	$ 0
Principal Amount Issued	$ 2,162
Debt instrument, interest rate, stated percentage	5.401%		5.401%

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