Fair Value - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investments in equity securities	$ 84	$ 79
Available-for-sale debt securities	244	226
Trading securities	5	5
Total assets	333	310
Fair Value, Inputs, Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investments in equity securities	84	79
Total assets	84	79
Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Available-for-sale debt securities	244	226
Trading securities	5	5
Total assets	$ 249	$ 231

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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