v3.25.2
Fair Value Measurements - Assets and liabilities measured and carried at fair value in the financial statements (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Assets:    
Available for sale (AFS) fixed maturities $ 10,489 $ 10,398
Trading fixed maturities 82 76
Equity securities 800 751
Assets of managed investment entities 3,833 4,140
Other assets 81 82
Total assets accounted for at fair value 15,210 15,366
Liabilities:    
Liabilities of managed investment entities 3,685 3,965
Derivative liability 7 18
Total liabilities accounted for at fair value 3,693 3,985
Contingent consideration — acquisitions    
Liabilities:    
Fair value of potential contingent consideration 1 2
Other liabilities — derivatives    
Liabilities:    
Derivative liability 7 18
Fixed maturities    
Assets:    
Available for sale (AFS) fixed maturities 10,489 10,398
Trading fixed maturities 82 76
U.S. government and government agencies    
Assets:    
Available for sale (AFS) fixed maturities 188 173
States, municipalities and political subdivisions    
Assets:    
Available for sale (AFS) fixed maturities 868 859
Foreign government    
Assets:    
Available for sale (AFS) fixed maturities 255 237
Residential MBS    
Assets:    
Available for sale (AFS) fixed maturities 2,217 1,989
Collateralized loan obligations    
Assets:    
Available for sale (AFS) fixed maturities 1,088 1,237
Other asset-backed securities    
Assets:    
Available for sale (AFS) fixed maturities 2,406 2,407
Corporate and other    
Assets:    
Available for sale (AFS) fixed maturities 3,467 3,496
Equity securities    
Assets:    
Equity securities 800 751
Other assets    
Assets:    
Other assets 6 1
Level 1    
Assets:    
Assets of managed investment entities 360 419
Total assets accounted for at fair value 1,011 1,023
Liabilities:    
Liabilities of managed investment entities 346 402
Total liabilities accounted for at fair value 346 402
Level 1 | Contingent consideration — acquisitions    
Liabilities:    
Fair value of potential contingent consideration 0 0
Level 1 | Other liabilities — derivatives    
Liabilities:    
Derivative liability 0 0
Level 1 | Fixed maturities    
Assets:    
Available for sale (AFS) fixed maturities 184 185
Trading fixed maturities 0 0
Level 1 | U.S. government and government agencies    
Assets:    
Available for sale (AFS) fixed maturities 184 173
Level 1 | States, municipalities and political subdivisions    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 1 | Foreign government    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 1 | Residential MBS    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 1 | Collateralized loan obligations    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 1 | Other asset-backed securities    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 1 | Corporate and other    
Assets:    
Available for sale (AFS) fixed maturities 0 12
Level 1 | Equity securities    
Assets:    
Equity securities 467 419
Level 1 | Other assets    
Assets:    
Other assets 0 0
Level 2    
Assets:    
Assets of managed investment entities 3,462 3,711
Total assets accounted for at fair value 13,137 13,247
Liabilities:    
Liabilities of managed investment entities 3,328 3,553
Total liabilities accounted for at fair value 3,335 3,571
Level 2 | Contingent consideration — acquisitions    
Liabilities:    
Fair value of potential contingent consideration 0 0
Level 2 | Other liabilities — derivatives    
Liabilities:    
Derivative liability 7 18
Level 2 | Fixed maturities    
Assets:    
Available for sale (AFS) fixed maturities 9,553 9,445
Trading fixed maturities 69 50
Level 2 | U.S. government and government agencies    
Assets:    
Available for sale (AFS) fixed maturities 4 0
Level 2 | States, municipalities and political subdivisions    
Assets:    
Available for sale (AFS) fixed maturities 862 858
Level 2 | Foreign government    
Assets:    
Available for sale (AFS) fixed maturities 255 237
Level 2 | Residential MBS    
Assets:    
Available for sale (AFS) fixed maturities 2,216 1,988
Level 2 | Collateralized loan obligations    
Assets:    
Available for sale (AFS) fixed maturities 1,088 1,237
Level 2 | Other asset-backed securities    
Assets:    
Available for sale (AFS) fixed maturities 2,122 2,111
Level 2 | Corporate and other    
Assets:    
Available for sale (AFS) fixed maturities 3,006 3,014
Level 2 | Equity securities    
Assets:    
Equity securities 47 40
Level 2 | Other assets    
Assets:    
Other assets 6 1
Level 3    
Assets:    
Assets of managed investment entities 11 10
Total assets accounted for at fair value 1,062 1,096
Liabilities:    
Liabilities of managed investment entities 11 10
Total liabilities accounted for at fair value 12 12
Level 3 | Contingent consideration — acquisitions    
Liabilities:    
Fair value of potential contingent consideration 1 2
Level 3 | Other liabilities — derivatives    
Liabilities:    
Derivative liability 0 0
Level 3 | Fixed maturities    
Assets:    
Available for sale (AFS) fixed maturities 752 768
Trading fixed maturities 13 26
Level 3 | U.S. government and government agencies    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 3 | States, municipalities and political subdivisions    
Assets:    
Available for sale (AFS) fixed maturities 6 1
Level 3 | Foreign government    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 3 | Residential MBS    
Assets:    
Available for sale (AFS) fixed maturities 1 1
Level 3 | Collateralized loan obligations    
Assets:    
Available for sale (AFS) fixed maturities 0 0
Level 3 | Other asset-backed securities    
Assets:    
Available for sale (AFS) fixed maturities 284 296
Level 3 | Corporate and other    
Assets:    
Available for sale (AFS) fixed maturities 461 470
Level 3 | Equity securities    
Assets:    
Equity securities 286 292
Level 3 | Other assets    
Assets:    
Other assets $ 0 $ 0