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Fair Value Measurements and Financial Instruments - Additional Information (Detail) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Mar. 31, 2022 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Carrying amount of our investments without readily determinable fair values |  | $ 724,000,000 | $ 764,000,000 |  |  |  |
Cumulative adjustments due to observable price changes |  | 186,000,000 |  |  |  |  |
Cumulative adjustments due to impairment charges |  | 120,000,000 |  |  |  |  |
Initial value of the excluded components |  |  |  |  |  |  | $ 1,000,000,000
Hedged Liability, Statement of Financial Position [Extensible Enumeration] |  |  |  |  |  |  | Other liabilities
Derivative asset fair value of collateral |  | 0 | 0 |  |  |  |
Collateral payments related to derivative contracts |  | 2,118,000,000 | 1,406,000,000 |  |  |  |
Scenario, Forecast | Interest Expense |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Excluded components | $ 94,000,000 |  |  |  |  |  |
TracFone Wireless, Inc. |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Contingent consideration payment |  | $ 52,000,000 | $ 257,000,000 | $ 188,000,000 |  |  |
Euro-denominated debt | Net Investment Hedges |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |
Notional amount | € |  |  |  |  | € 750 | € 750 |

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