v3.25.4
Investments - Debt Instruments At Fair Value (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities, at fair value $ 11,072 $ 11,452
Corporate debt securities    
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities, at fair value 7,039 7,276
Securities backed by real estate    
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities, at fair value 312 569
Money market instruments    
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities, at fair value 2,333 1,780
Other    
Debt and Equity Securities, FV-NI [Line Items]    
Debt securities, at fair value $ 1,388 $ 1,827