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Debt - Issuances and Commercial Paper Program (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Short-term Debt [Line Items] |  |  |  |
Net Proceeds | $ 2,276,000,000 | $ 1,676,000,000 | $ 3,952,000,000 |
Pension |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Employer discretionary contribution amount | $ 563,000,000 |  | $ 563,000,000 | $ 365,000,000
Verizon 5.250% Notes Due 2035 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt instrument, interest rate, stated percentage | 5.25% | 5.25% | 5.25% |
Principal Amount Issued | $ 2,300,000,000 | $ 2,250,000,000 | $ 2,300,000,000 |
Net Proceeds |  | $ 1,676,000,000 |  |
Verizon 3.250% notes due 2032 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt instrument, interest rate, stated percentage | 3.25% |  | 3.25% |
Principal Amount Issued | $ 1,000,000,000 |  | $ 1,000,000,000 |
Net Proceeds | $ 1,142,000,000 |  |  |
Verizon 3.750% notes due 2037 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt instrument, interest rate, stated percentage | 3.75% |  | 3.75% |
Principal Amount Issued | $ 1,000,000,000 |  | $ 1,000,000,000 |
Net Proceeds | 1,134,000,000 |  |  |
Commercial Paper |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Commercial paper issued |  |  | 11,600,000,000 |
Repayments of short-term debt |  |  | 11,600,000,000 |
Commercial paper | $ 0 |  | $ 0 |

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