v3.25.2
Investments (excluding Consolidated Investment Entities) - Fixed Maturities (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost $ 28,144 $ 26,536  
Securities pledged, Amortized Cost 1,140 1,665  
Fixed maturities, allowance for credit losses 52 38 $ 17
Collateral Pledged      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Debt Securities, Available-for-Sale, Restricted 1,077 1,523  
U.S. Treasuries      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 593 524  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 2 0  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 49 52  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 0  
Fixed maturities, including securities pledged, Fair Value 546 472  
U.S. Government agencies and authorities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 30 29  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 1 1  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 0 0  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 0  
Fixed maturities, including securities pledged, Fair Value 31 30  
State, municipalities and political subdivisions      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 623 697  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 0 0  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 107 117  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 0  
Fixed maturities, including securities pledged, Fair Value 516 580  
U.S. corporate public securities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 8,257 7,938  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 147 124  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 986 1,054  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 0  
Fixed maturities, including securities pledged, Fair Value 7,418 7,008  
U.S. corporate private securities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 5,557 5,275  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 71 43  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 238 329  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 2 6 0
Fixed maturities, including securities pledged, Fair Value 5,388 4,983  
Foreign corporate public securities and foreign governments      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 2,770 2,729  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 42 32  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 250 287  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 2 2 3
Fixed maturities, including securities pledged, Fair Value 2,560 2,472  
Foreign corporate private securities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 2,949 2,693  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 55 22  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 70 169  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 42 9 2
Fixed maturities, including securities pledged, Fair Value 2,892 2,537  
Residential mortgage-backed      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 3,896 3,709  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 40 27  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 223 261  
Embedded Derivatives (3) 4  
Fixed maturities, allowance for credit losses 0 0  
Fixed maturities, including securities pledged, Fair Value 3,716 3,471  
Commercial mortgage-backed securities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 3,489 3,677  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 5 4  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 454 532  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 17 $ 9
Fixed maturities, including securities pledged, Fair Value 3,040 3,132  
Other asset-backed securities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 2,994 2,779  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 32 39  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 38 45  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 6 4  
Fixed maturities, including securities pledged, Fair Value 2,982 2,769  
Fixed maturities      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Fixed maturities, including securities pledged, Amortized Cost 31,158 30,050  
Total fixed maturities, less securities pledged, Amortized Cost 30,018 28,385  
Fixed maturities, including securities pledged, Gross Unrealized Capital Gains 395 292  
Total fixed maturities, less securities pledged, Gross Unrealized Capital Gains 395 292  
Fixed maturities, including securities pledged, Gross Unrealized Capital Losses 2,415 2,846  
Total fixed maturities, less securities pledged, Gross Unrealized Capital Losses 2,352 2,697  
Embedded Derivatives (3) 4  
Fixed maturities, allowance for credit losses 52 38  
Fixed maturities, including securities pledged, Fair Value 29,089 27,454  
Total fixed maturities, less securities pledged, Fair Value 28,012 25,938  
Fixed maturities | OneAmerica      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Total fixed maturities, less securities pledged, Fair Value 1,400    
Fixed maturities | Collateral Pledged      
Schedule of Available for Sale, including Securities Pledged [Line Items]      
Securities pledged, Amortized Cost 1,140 1,665  
Securities pledged, Gross Unrealized Capital Gains 0 0  
Securities pledged, Gross Unrealized Capital Losses 63 149  
Embedded Derivatives 0 0  
Fixed maturities, allowance for credit losses 0 0  
Debt Securities, Available-for-Sale, Restricted $ 1,077 $ 1,516