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Fair Value Measurements and Financial Instruments - Derivative Activity (Details) - Designated as Hedging Instrument - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Interest rate swaps | Fair Value Hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional value entered into | $ 0 | $ 0
Notional value settled | 2,046 | 0
Cash received (paid) for settlement of derivatives | (57) | 0
Interest rate swaps | Fair Value Hedges | Interest Expense |  |
Derivatives, Fair Value [Line Items] |  |
Pre-tax gain recognized in Interest expense | 4 | 1
Cross currency swaps | Fair Value Hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional value entered into | 2,146 | 0
Notional value settled | 3,619 | 1,450
Exchange gains and losses from the conversion of foreign currency denominated as debt | (1,839) | 1,119
Excluded components | 730 | 826
Cash received (paid) for settlement of derivatives | (243) | (67)
Cross currency swaps | Fair Value Hedges | Verizon Stated And Floating Rate Notes And Bonds |  |
Derivatives, Fair Value [Line Items] |  |
Exchange gains and losses from the conversion of foreign currency denominated as debt | 1,839 | (1,119)
Cross currency swaps | Fair Value Hedges | Interest Expense |  |
Derivatives, Fair Value [Line Items] |  |
Excluded components | 96 | 109
Treasury rate locks | Cash Flow Hedges |  |
Derivatives, Fair Value [Line Items] |  |
Notional value entered into | 1,000 | 500
Notional value settled | 1,000 | 500
Pre-tax gain (loss) recognized in Other comprehensive income (loss) | (21) | 5
Cash received (paid) for settlement of derivatives | $ (21) | $ 5

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