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Fair Value - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Investments in equity securities | $ 78 | $ 69
Available-for-sale debt securities | 231 | 192
Trading securities | 5 | 5
Total assets | 314 | 266
Fair Value, Inputs, Level 1 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Investments in equity securities | 78 | 69
Total assets | 78 | 69
Fair Value, Inputs, Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 231 | 192
Trading securities | 5 | 5
Total assets | $ 236 | $ 197

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