Fair Value Measurements and Financial Instruments - Schedule of Designated Derivative Activity (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest rate swaps \| Fair Value Hedges
Derivative [Line Items]
Notional value entered into	$ 0	$ 0	$ 0	$ 0
Notional value settled	1,254	0	1,254	0
Cash received (paid) for settlement of derivatives			(6)	0
Interest rate swaps \| Fair Value Hedges \| Interest Expense
Derivative [Line Items]
Pre-tax gain (loss) recognized in Interest expense	(2)	2	1	3
Cross currency swaps \| Fair Value Hedges
Derivative [Line Items]
Notional value entered into	0	0	2,146	0
Notional value settled	0	0	3,619	1,450
Exchange gains (losses) from the conversion of foreign currency denominated as debt	1,272	(1,036)	438	(311)
Excluded component	(573)	809	(407)	851
Cash received (paid) for settlement of derivatives			(243)	(67)
Cross currency swaps \| Fair Value Hedges \| Verizon Stated And Floating Rate Notes and Bonds
Derivative [Line Items]
Exchange gains (losses) from the conversion of foreign currency denominated as debt	(1,272)	1,036	(438)	311
Cross currency swaps \| Fair Value Hedges \| Interest Expense
Derivative [Line Items]
Excluded component	23	28	73	82
Treasury rate locks \| Cash Flow Hedging
Derivative [Line Items]
Notional value entered into	1,000	0	1,000	500
Notional value settled	1,000	0	1,000	500
Pre-tax gain (loss) recognized in Other income, net	$ (21)	$ 0	(21)	5
Cash received (paid) for settlement of derivatives			$ (21)	$ 5

Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

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