v3.25.1
Fair Value of Financial Information - Unrealized Positions for Available-for-sale Fixed-Income Securities (Details) - Available-for-sale fixed-income securities - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost Basis $ 84 $ 94
Gross Unrealized Gains 1 2
Gross Unrealized Losses 1 2
Fair Value $ 84 $ 94