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Fair Value of Financial Information - Schedule of Unrealized Positions for Available-for-sale Fixed-Income Securities (Details) - Available-for-sale fixed-income securities - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost Basis	$ 36	$ 94
Gross unrealized gains	0	2
Gross unrealized losses	1	2
Fair Value	$ 35	$ 94

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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