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Fair Value - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | $ 192 | $ 182
Fair Value, Measurements, Recurring |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Investments in equity securities | 69 | 69
Available-for-sale debt securities | 192 | 182
Trading securities | 5 | 5
Total assets | 266 | 256
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Investments in equity securities | 69 | 69
Total assets | 69 | 69
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Available-for-sale debt securities | 192 | 182
Trading securities | 5 | 5
Total assets | $ 197 | $ 187

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