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Investments - Fair Value and Gross Unrealized Losses in a Continuous Unrealized Loss Position (Details) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
Fair Value |  |
Less Than or Equal to Twelve Months | $ 36,227 | $ 17,427
Greater Than Twelve Months | 34,177 | 44,508
Total | 70,404 | 61,935
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 6,009 | 3,526
Greater Than Twelve Months | 5,213 | 6,241
Total | $ 11,222 | $ 9,767
Total number of fixed maturity AFS securities in an unrealized loss position | security | 7,467 | 7,605
Unrealized holding gains (losses) arising during the period | $ (18) | $ (8)
Corporate bonds |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 30,140 | 14,005
Greater Than Twelve Months | 27,155 | 34,595
Total | 57,295 | 48,600
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 5,345 | 3,270
Greater Than Twelve Months | 4,399 | 5,002
Total | 9,744 | 8,272
U.S. government bonds |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 88 | 65
Greater Than Twelve Months | 198 | 195
Total | 286 | 260
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 6 | 6
Greater Than Twelve Months | 32 | 23
Total | 38 | 29
State and municipal bonds |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 1,207 | 371
Greater Than Twelve Months | 611 | 874
Total | 1,818 | 1,245
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 278 | 72
Greater Than Twelve Months | 146 | 345
Total | 424 | 417
Foreign government bonds |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 81 | 111
Greater Than Twelve Months | 92 | 57
Total | 173 | 168
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 25 | 31
Greater Than Twelve Months | 30 | 16
Total | 55 | 47
RMBS |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 731 | 360
Greater Than Twelve Months | 785 | 886
Total | 1,516 | 1,246
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 87 | 20
Greater Than Twelve Months | 132 | 177
Total | 219 | 197
CMBS |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 796 | 583
Greater Than Twelve Months | 555 | 589
Total | 1,351 | 1,172
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 93 | 56
Greater Than Twelve Months | 89 | 147
Total | 182 | 203
ABS |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 3,169 | 1,900
Greater Than Twelve Months | 4,680 | 7,217
Total | 7,849 | 9,117
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 172 | 68
Greater Than Twelve Months | 375 | 517
Total | 547 | 585
Hybrid and redeemable preferred securities |  |
Fair Value |  |
Less Than or Equal to Twelve Months | 15 | 32
Greater Than Twelve Months | 101 | 95
Total | 116 | 127
Gross Unrealized Losses |  |
Less Than or Equal to Twelve Months | 3 | 3
Greater Than Twelve Months | 10 | 14
Total | $ 13 | $ 17

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