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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, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Interest rate swaps | Fair Value Hedges | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | $ 0 | $ 0 | $ 0 | $ 0
Notional value settled | 985,000,000 | 0 | 985,000,000 | 0
Pre-tax gain recognized in Interest expense | 0 | 1,000,000 | 0 | 3,000,000
Interest rate swaps | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Cash received (paid) for settlement of derivatives |  |  | (45,000,000) | 0
Cross currency swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain recognized in Interest expense | 0 | 0 | 0 | 0
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 0 | 0 | 0 | 2,146,000,000
Notional value settled | 817,000,000 | 552,000,000 | 1,176,000,000 | 3,619,000,000
Exchange gains (losses) from the conversion of foreign currency denominated as debt | 2,422,000,000 | (92,000,000) | 3,500,000,000 | (834,000,000)
Excluded component | (28,000,000) | (116,000,000) | (877,000,000) | 166,000,000
Cash received (paid) for settlement of derivatives |  |  | (80,000,000) | (243,000,000)
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument | Verizon Stated And Floating Rate Notes and Bonds |  |  |  |
Derivative [Line Items] |  |  |  |
Exchange gains (losses) from the conversion of foreign currency denominated as debt | (2,422,000,000) | 92,000,000 | (3,500,000,000) | 834,000,000
Cross currency swaps | Fair Value Hedges | Designated as Hedging Instrument | Interest Expense |  |  |  |
Derivative [Line Items] |  |  |  |
Excluded component | 23,000,000 | 24,000,000 | 46,000,000 | 50,000,000
Treasury rate locks | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value entered into | 4,900,000,000 | 0 | 4,900,000,000 | 0
Notional value settled | 0 | 0 | 0 | 0
Pre-tax gain (loss) recognized in Other income (expense), net | $ (55,000,000) | $ 0 | $ (55,000,000) | $ 0

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- Definition Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-21 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (b) -SubTopic 20 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480627/815-20-45-1A + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 + Details
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