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Investments - Gross unrealized losses on securities by investment category and length of time that have been in a continuous unrealized loss position (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Total fixed maturities |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (71) | $ (425)
Fair value - less than twelve months | $ 2,206 | $ 6,540
Fair value as percentage of cost - Less than twelve months | 97.00% | 94.00%
Unrealized Loss - Twelve months or more | $ (556) | $ (244)
Fair Value - Twelve months or more | $ 5,991 | $ 2,344
Fair value as percentage of cost - Twelve months or more | 92.00% | 91.00%
U.S. government and government agencies |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (1) | $ (4)
Fair value - less than twelve months | $ 32 | $ 111
Fair value as percentage of cost - Less than twelve months | 97.00% | 97.00%
Unrealized Loss - Twelve months or more | $ (11) | $ (10)
Fair Value - Twelve months or more | $ 195 | $ 107
Fair value as percentage of cost - Twelve months or more | 95.00% | 91.00%
States, municipalities and political subdivisions |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (11) | $ (50)
Fair value - less than twelve months | $ 352 | $ 967
Fair value as percentage of cost - Less than twelve months | 97.00% | 95.00%
Unrealized Loss - Twelve months or more | $ (36) | $ (1)
Fair Value - Twelve months or more | $ 438 | $ 15
Fair value as percentage of cost - Twelve months or more | 92.00% | 94.00%
Foreign government |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (3) | $ (5)
Fair value - less than twelve months | $ 17 | $ 90
Fair value as percentage of cost - Less than twelve months | 85.00% | 95.00%
Unrealized Loss - Twelve months or more | $ (11) | $ (9)
Fair Value - Twelve months or more | $ 211 | $ 134
Fair value as percentage of cost - Twelve months or more | 95.00% | 94.00%
Residential MBS |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (13) | $ (115)
Fair value - less than twelve months | $ 357 | $ 1,078
Fair value as percentage of cost - Less than twelve months | 96.00% | 90.00%
Unrealized Loss - Twelve months or more | $ (169) | $ (65)
Fair Value - Twelve months or more | $ 1,009 | $ 315
Fair value as percentage of cost - Twelve months or more | 86.00% | 83.00%
Commercial MBS |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ 0 | $ (2)
Fair value - less than twelve months | $ 11 | $ 44
Fair value as percentage of cost - Less than twelve months | 100.00% | 96.00%
Unrealized Loss - Twelve months or more | $ (2) | $ (1)
Fair Value - Twelve months or more | $ 64 | $ 33
Fair value as percentage of cost - Twelve months or more | 97.00% | 97.00%
Collateralized loan obligations |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (2) | $ (44)
Fair value - less than twelve months | $ 92 | $ 1,224
Fair value as percentage of cost - Less than twelve months | 98.00% | 97.00%
Unrealized Loss - Twelve months or more | $ (48) | $ (23)
Fair Value - Twelve months or more | $ 1,297 | $ 587
Fair value as percentage of cost - Twelve months or more | 96.00% | 96.00%
Other asset-backed securities |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (10) | $ (100)
Fair value - less than twelve months | $ 360 | $ 1,361
Fair value as percentage of cost - Less than twelve months | 97.00% | 93.00%
Unrealized Loss - Twelve months or more | $ (152) | $ (84)
Fair Value - Twelve months or more | $ 1,601 | $ 740
Fair value as percentage of cost - Twelve months or more | 91.00% | 90.00%
Corporate and other |  |
Available for sale securities in a continuous unrealized loss position |  |
Unrealized loss - less than twelve months | $ (31) | $ (105)
Fair value - less than twelve months | $ 985 | $ 1,665
Fair value as percentage of cost - Less than twelve months | 97.00% | 94.00%
Unrealized Loss - Twelve months or more | $ (127) | $ (51)
Fair Value - Twelve months or more | $ 1,176 | $ 413
Fair value as percentage of cost - Twelve months or more | 90.00% | 89.00%

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