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Segment Reporting - Schedule of Segment Results (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Net premiums earned | $ 1,005 | $ 1,002 | $ 2,149 | $ 1,783
Other policy revenue | 184 | 103 | 296 | 200
Total net investment income | 924 | 342 | 1,372 | 666
Investment related gains (losses) | 2 | 41 | (32) | (20)
Total revenues | 2,115 | 1,488 | 3,785 | 2,629
Policyholder benefits and claims incurred | 1,030 | 989 | 2,116 | 1,689
Interest sensitive contract benefits | 390 | 116 | 545 | 205
Amortization of deferred policy acquisition costs, deferred sales inducements and value of business acquired | 199 | 132 | 360 | 263
Change in fair value of insurance-related derivatives and embedded derivatives | 21 | (26) | 2 | 0
Change in fair value of market risk benefits | 139 | (12) | 158 | (7)
Operating expenses | 335 | 148 | 438 | 303
Interest expense | 43 | 22 | 65 | 46
Total benefits and expenses | 2,157 | 1,369 | 3,684 | 2,499
Net income (loss) before income taxes | (42) | 119 | 101 | 130
Operating Segments | Annuity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net premiums earned | 446 | 400 | 1,011 | 560
Other policy revenue | 90 | 10 | 105 | 17
Total net investment income | 775 | 205 | 1,035 | 382
Investment related gains (losses) | 3 | 0 | 3 | 0
Total revenues | 1,314 | 615 | 2,154 | 959
Policyholder benefits and claims incurred | 483 | 414 | 1,084 | 594
Interest sensitive contract benefits | 364 | 65 | 449 | 83
Amortization of deferred policy acquisition costs, deferred sales inducements and value of business acquired | 114 | 2 | 120 | 6
Change in fair value of insurance-related derivatives and embedded derivatives | 28 | (34) | (12) | (53)
Change in fair value of market risk benefits | 139 | (12) | 158 | (7)
Operating expenses | 80 | 30 | 133 | 53
Interest expense | 0 | 0 | 0 | 0
Total benefits and expenses | 1,208 | 465 | 1,932 | 676
Net income (loss) before income taxes | 106 | 150 | 222 | 283
Operating Segments | Life |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net premiums earned | 98 | 104 | 200 | 214
Other policy revenue | 94 | 93 | 191 | 183
Total net investment income | 102 | 80 | 187 | 161
Investment related gains (losses) | 0 | 0 | 0 | 0
Total revenues | 294 | 277 | 578 | 558
Policyholder benefits and claims incurred | 161 | 151 | 326 | 305
Interest sensitive contract benefits | 26 | 51 | 96 | 122
Amortization of deferred policy acquisition costs, deferred sales inducements and value of business acquired | 11 | 14 | 22 | 24
Change in fair value of insurance-related derivatives and embedded derivatives | (7) | 8 | 14 | 53
Change in fair value of market risk benefits | 0 | 0 | 0 | 0
Operating expenses | 62 | 57 | 128 | 118
Interest expense | 0 | 0 | 0 | 0
Total benefits and expenses | 253 | 281 | 586 | 622
Net income (loss) before income taxes | 41 | (4) | (8) | (64)
Operating Segments | P&C |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net premiums earned | 461 | 498 | 938 | 1,009
Other policy revenue | 0 | 0 | 0 | 0
Total net investment income | 47 | 47 | 80 | 90
Investment related gains (losses) | 0 | 0 | 0 | 0
Total revenues | 508 | 545 | 1,018 | 1,099
Policyholder benefits and claims incurred | 386 | 424 | 706 | 790
Interest sensitive contract benefits | 0 | 0 | 0 | 0
Amortization of deferred policy acquisition costs, deferred sales inducements and value of business acquired | 74 | 116 | 218 | 233
Change in fair value of insurance-related derivatives and embedded derivatives | 0 | 0 | 0 | 0
Change in fair value of market risk benefits | 0 | 0 | 0 | 0
Operating expenses | 68 | 52 | 82 | 115
Interest expense | 0 | 0 | 0 | 0
Total benefits and expenses | 528 | 592 | 1,006 | 1,138
Net income (loss) before income taxes | (20) | (47) | 12 | (39)
Operating Segments | Corporate & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net premiums earned | 0 | 0 | 0 | 0
Other policy revenue | 0 | 0 | 0 | 0
Total net investment income | 0 | 10 | 70 | 33
Investment related gains (losses) | (1) | 41 | (35) | (20)
Total revenues | (1) | 51 | 35 | 13
Policyholder benefits and claims incurred | 0 | 0 | 0 | 0
Interest sensitive contract benefits | 0 | 0 | 0 | 0
Amortization of deferred policy acquisition costs, deferred sales inducements and value of business acquired | 0 | 0 | 0 | 0
Change in fair value of insurance-related derivatives and embedded derivatives | 0 | 0 | 0 | 0
Change in fair value of market risk benefits | 0 | 0 | 0 | 0
Operating expenses | 125 | 9 | 95 | 17
Interest expense | 43 | 22 | 65 | 46
Total benefits and expenses | 168 | 31 | 160 | 63
Net income (loss) before income taxes | $ (169) | $ 20 | $ (125) | $ (50)

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Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
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Data Type: | na
Balance Type: |
Period Type: |