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Fair Value Measurements and Financial Instruments - Schedule of Designated Derivative Activity (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Derivative [Line Items] |  |  |  |
Exchange gains and losses from the conversion of foreign currency denominated as debt | $ 0 | $ 0 | $ 0 | $ 0
Interest rate swaps | Fair Value Hedges | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 0 | 500,000,000 | 0 | 7,155,000,000
Notional value settled | 0 | 0 | 0 | 863,000,000
Cash received (paid) for settlement of derivatives |  |  | 0 | 40,000,000
Interest rate swaps | Fair Value Hedges | Designated as Hedging Instrument | Interest Expense |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain recognized in Interest expense | 2,000,000 | 0 | 1,000,000 | 0
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 0 | 0 | 0 |
Notional value settled | 612,000,000 | 0 | 1,450,000,000 |
Exchange gains and losses from the conversion of foreign currency denominated as debt | 370,000,000 | (1,808,000,000) | 725,000,000 | (1,808,000,000)
Excluded component | 420,000,000 | (340,000,000) | 42,000,000 | (340,000,000)
Cash received (paid) for settlement of derivatives |  |  | (67,000,000) |
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument | Verizon Stated And Floating Rate Notes and Bonds |  |  |  |
Derivative [Line Items] |  |  |  |
Exchange gains and losses from the conversion of foreign currency denominated as debt | (370,000,000) | 1,808,000,000 | (725,000,000) | 1,808,000,000
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument | Interest Expense |  |  |  |
Derivative [Line Items] |  |  |  |
Excluded component | 27,000,000 | 27,000,000 | 54,000,000 | 27,000,000
Cross currency swaps | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into |  |  |  | 0
Notional value settled |  |  |  | 0
Pre-tax gain (loss) recognized in other comprehensive loss |  |  |  | (430,000,000)
Cash received (paid) for settlement of derivatives |  |  |  | 0
Forward starting interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 0 | 0 | 0 | 0
Notional value settled | 0 | 600,000,000 | 0 | 1,000,000,000
Pre-tax gain (loss) recognized in other comprehensive loss | 0 | 68,000,000 | 0 | 196,000,000
Cash received (paid) for settlement of derivatives |  |  | 0 | (107,000,000)
Treasury rate locks | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 500,000,000 | 0 | 500,000,000 | 0
Notional value settled | 500,000,000 | 0 | 500,000,000 | 0
Pre-tax gain (loss) recognized in other comprehensive loss | $ 5,000,000 | $ 0 | 5,000,000 | 0
Cash received (paid) for settlement of derivatives |  |  | $ 5,000,000 | $ 0

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