XML 66 R59.htm IDEA: XBRL DOCUMENT v3.25.1
Investments (Gross Unrealized Losses Related To Available-For-Sale And Held-To-Maturity Investments) (Detail) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Available For Sale Securities [Abstract]    
Investment, Type [Extensible Enumeration] Fixed Maturities [Member] Fixed Maturities [Member]
Less than 12 months, fair value $ 121 $ 106
Less than 12 months, unrealized losses (3) (4)
12 months or longer, fair value 612 634
12 months or longer, unrealized losses (136) (156)
Total, fair value 733 740
Tota, unrealized losses (139) (160)
U.S. Treasury And Government Agency [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 3 41
Less than 12 months, unrealized losses 0 (1)
12 months or longer, fair value 119 123
12 months or longer, unrealized losses (13) (18)
Total, fair value 122 164
Tota, unrealized losses (13) (19)
State and municipal bonds [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 6 15
Less than 12 months, unrealized losses 0 (1)
12 months or longer, fair value 63 63
12 months or longer, unrealized losses (9) (10)
Total, fair value 69 78
Tota, unrealized losses (9) (11)
Foreign Governments [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 1 5
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 5 5
12 months or longer, unrealized losses (2) (2)
Total, fair value 6 10
Tota, unrealized losses (2) (2)
Corporate Obligations [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 24 25
Less than 12 months, unrealized losses (3) (1)
12 months or longer, fair value 285 302
12 months or longer, unrealized losses (95) (105)
Total, fair value 309 327
Tota, unrealized losses (98) (106)
Residential Mortgage backed Agency [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 0 5
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 98 100
12 months or longer, unrealized losses (14) (16)
Total, fair value 98 105
Tota, unrealized losses (14) (16)
Residential Mortgage Backed Non Agency [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 0 6
Less than 12 months, unrealized losses 0 (1)
12 months or longer, fair value 6 21
12 months or longer, unrealized losses (1) (4)
Total, fair value 6 27
Tota, unrealized losses (1) (5)
Commercial mortgage backed Securities [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 0  
Less than 12 months, unrealized losses 0  
12 months or longer, fair value 6  
12 months or longer, unrealized losses 0  
Total, fair value 6  
Tota, unrealized losses 0  
Collateralized debt obligations [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 29 6
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 2 8
12 months or longer, unrealized losses 0 0
Total, fair value 31 14
Tota, unrealized losses 0 0
Other asset backed [Member]    
Available For Sale Securities [Abstract]    
Less than 12 months, fair value 58 3
Less than 12 months, unrealized losses 0 0
12 months or longer, fair value 28 12
12 months or longer, unrealized losses (2) (1)
Total, fair value 86 15
Tota, unrealized losses $ (2) $ (1)