v3.25.2
Fair Value Measurements - Fair Value Measurement (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Assets:    
Derivatives $ 148 $ 239
Assets held in separate accounts 104,149 98,579
Liabilities:    
Derivatives 252 268
Assets measured on recurring basis    
Assets:    
Fixed maturities, including securities pledged 21,864 20,134
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreement 1,229 1,375
Assets held in separate accounts 104,149 98,579
Total assets, fair value 127,466 120,393
Liabilities:    
Total liabilities, fair value 265 287
Assets measured on recurring basis | Stabilizer and MCGs    
Liabilities:    
Product guarantees 13 19
Assets measured on recurring basis | Interest rate contracts    
Assets:    
Derivatives 139 201
Liabilities:    
Derivatives 225 266
Assets measured on recurring basis | Foreign exchange contracts    
Assets:    
Derivatives 9 38
Liabilities:    
Derivatives 25 2
Assets measured on recurring basis | Reinsurance agreements    
Assets:    
Derivatives 16  
Assets measured on recurring basis | Credit contracts    
Liabilities:    
Derivatives 2 0
Assets measured on recurring basis | U.S. Treasuries    
Assets:    
Fixed maturities, including securities pledged 433 378
Assets measured on recurring basis | US Treasury and Government    
Assets:    
Fixed maturities, including securities pledged 28 27
Assets measured on recurring basis | State, municipalities and political subdivisions    
Assets:    
Fixed maturities, including securities pledged 361 409
Assets measured on recurring basis | U.S. corporate public securities    
Assets:    
Fixed maturities, including securities pledged 5,644 5,249
Assets measured on recurring basis | U.S. corporate private securities    
Assets:    
Fixed maturities, including securities pledged 4,218 3,799
Assets measured on recurring basis | Foreign corporate public securities and foreign governments    
Assets:    
Fixed maturities, including securities pledged 1,967 1,868
Assets measured on recurring basis | Foreign corporate private securities    
Assets:    
Fixed maturities, including securities pledged 2,319 2,029
Assets measured on recurring basis | Residential mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 2,774 2,525
Assets measured on recurring basis | Commercial mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 2,112 2,111
Assets measured on recurring basis | Other asset-backed securities    
Assets:    
Fixed maturities, including securities pledged 2,008 1,739
Assets measured on recurring basis | Equity securities    
Liabilities:    
Equity Securities, FV-NI 60 66
Assets measured on recurring basis | Level 1    
Assets:    
Fixed maturities, including securities pledged 330 307
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreement 1,167 1,356
Assets held in separate accounts 98,201 92,849
Total assets, fair value 99,715 94,522
Liabilities:    
Total liabilities, fair value 0 10
Assets measured on recurring basis | Level 1 | Stabilizer and MCGs    
Liabilities:    
Product guarantees 0 0
Assets measured on recurring basis | Level 1 | Interest rate contracts    
Assets:    
Derivatives 8 0
Liabilities:    
Derivatives 0 10
Assets measured on recurring basis | Level 1 | Foreign exchange contracts    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Assets measured on recurring basis | Level 1 | Reinsurance agreements    
Assets:    
Derivatives 0  
Assets measured on recurring basis | Level 1 | Credit contracts    
Liabilities:    
Derivatives 0 0
Assets measured on recurring basis | Level 1 | U.S. Treasuries    
Assets:    
Fixed maturities, including securities pledged 330 307
Assets measured on recurring basis | Level 1 | US Treasury and Government    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | State, municipalities and political subdivisions    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | U.S. corporate public securities    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | U.S. corporate private securities    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Foreign corporate public securities and foreign governments    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Foreign corporate private securities    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Residential mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Commercial mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Other asset-backed securities    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 1 | Equity securities    
Liabilities:    
Equity Securities, FV-NI 9 10
Assets measured on recurring basis | Level 2    
Assets:    
Fixed maturities, including securities pledged 19,474 18,152
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreement 41 0
Assets held in separate accounts 5,601 5,390
Total assets, fair value 25,256 23,781
Liabilities:    
Total liabilities, fair value 252 258
Assets measured on recurring basis | Level 2 | Stabilizer and MCGs    
Liabilities:    
Product guarantees 0 0
Assets measured on recurring basis | Level 2 | Interest rate contracts    
Assets:    
Derivatives 131 201
Liabilities:    
Derivatives 225 256
Assets measured on recurring basis | Level 2 | Foreign exchange contracts    
Assets:    
Derivatives 9 38
Liabilities:    
Derivatives 25 2
Assets measured on recurring basis | Level 2 | Reinsurance agreements    
Assets:    
Derivatives 0  
Assets measured on recurring basis | Level 2 | Credit contracts    
Liabilities:    
Derivatives 2 0
Assets measured on recurring basis | Level 2 | U.S. Treasuries    
Assets:    
Fixed maturities, including securities pledged 103 71
Assets measured on recurring basis | Level 2 | US Treasury and Government    
Assets:    
Fixed maturities, including securities pledged 28 27
Assets measured on recurring basis | Level 2 | State, municipalities and political subdivisions    
Assets:    
Fixed maturities, including securities pledged 361 409
Assets measured on recurring basis | Level 2 | U.S. corporate public securities    
Assets:    
Fixed maturities, including securities pledged 5,605 5,202
Assets measured on recurring basis | Level 2 | U.S. corporate private securities    
Assets:    
Fixed maturities, including securities pledged 2,901 2,628
Assets measured on recurring basis | Level 2 | Foreign corporate public securities and foreign governments    
Assets:    
Fixed maturities, including securities pledged 1,919 1,820
Assets measured on recurring basis | Level 2 | Foreign corporate private securities    
Assets:    
Fixed maturities, including securities pledged 1,815 1,688
Assets measured on recurring basis | Level 2 | Residential mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 2,690 2,471
Assets measured on recurring basis | Level 2 | Commercial mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 2,112 2,111
Assets measured on recurring basis | Level 2 | Other asset-backed securities    
Assets:    
Fixed maturities, including securities pledged 1,940 1,725
Assets measured on recurring basis | Level 2 | Equity securities    
Liabilities:    
Equity Securities, FV-NI 0 0
Assets measured on recurring basis | Level 3    
Assets:    
Fixed maturities, including securities pledged 2,060 1,675
Cash and cash equivalents, short-term investments and short-term investments under securities loan agreement 21 19
Assets held in separate accounts 347 340
Total assets, fair value 2,495 2,090
Liabilities:    
Total liabilities, fair value 13 19
Assets measured on recurring basis | Level 3 | Stabilizer and MCGs    
Liabilities:    
Product guarantees 13 19
Assets measured on recurring basis | Level 3 | Interest rate contracts    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Assets measured on recurring basis | Level 3 | Foreign exchange contracts    
Assets:    
Derivatives 0 0
Liabilities:    
Derivatives 0 0
Assets measured on recurring basis | Level 3 | Reinsurance agreements    
Assets:    
Derivatives 16  
Assets measured on recurring basis | Level 3 | Credit contracts    
Liabilities:    
Derivatives 0 0
Assets measured on recurring basis | Level 3 | U.S. Treasuries    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 3 | US Treasury and Government    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 3 | State, municipalities and political subdivisions    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 3 | U.S. corporate public securities    
Assets:    
Fixed maturities, including securities pledged 39 47
Assets measured on recurring basis | Level 3 | U.S. corporate private securities    
Assets:    
Fixed maturities, including securities pledged 1,317 1,171
Assets measured on recurring basis | Level 3 | Foreign corporate public securities and foreign governments    
Assets:    
Fixed maturities, including securities pledged 48 48
Assets measured on recurring basis | Level 3 | Foreign corporate private securities    
Assets:    
Fixed maturities, including securities pledged 504 341
Assets measured on recurring basis | Level 3 | Residential mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 84 54
Assets measured on recurring basis | Level 3 | Commercial mortgage-backed    
Assets:    
Fixed maturities, including securities pledged 0 0
Assets measured on recurring basis | Level 3 | Other asset-backed securities    
Assets:    
Fixed maturities, including securities pledged 68 14
Assets measured on recurring basis | Level 3 | Equity securities    
Liabilities:    
Equity Securities, FV-NI $ 51 $ 56