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Fair Value Measurements and Financial Instruments - Schedule of Designated Derivative Activity (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest rate swaps | Fair Value Hedges
Derivative [Line Items]
Notional value entered into	$ 0	$ 0	$ 0	$ 0
Notional value settled	0	0	0	0
Interest rate swaps | Fair Value Hedges | Interest Expense
Derivative [Line Items]
Pre-tax gain recognized in Interest expense	1	2	3	1
Cross currency swaps | Fair Value Hedges
Derivative [Line Items]
Notional value entered into	0	0	2,146	0
Notional value settled	552	612	3,619	1,450
Exchange gains (losses) from the conversion of foreign currency denominated as debt	(92)	370	(834)	725
Excluded component	(116)	420	166	42
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	92	(370)	834	(725)
Cross currency swaps | Fair Value Hedges | Interest Expense
Derivative [Line Items]
Excluded component	24	27	50	54
Treasury rate locks | Cash Flow Hedging
Derivative [Line Items]
Notional value entered into	0	500	0	500
Notional value settled	0	500	0	500
Pre-tax gain (loss) recognized in Other income (expense), net	$ 0	$ 5	0	5
Cash received (paid) for settlement of derivatives			$ 0	$ 5

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