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Fair Value of Financial Instruments - Schedule of Changes to Fair Value of Financial Instruments Level 3 (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Jul. 17, 2024
Liabilities |  |  |  |  |
Liabilities, Total (Losses) Gains Included in Earnings | $ 314 | $ (780) | $ 501 | $ (198) |
Liabilities, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Liabilities, Purchases | 390 | 576 | 1,059 | 765 |
Liabilities, Sales | 0 | 0 | 0 | 0 |
Liabilities, Settlements | (135) | (45) | (310) | (110) |
Liabilities, Net transfer In (Out) of Level 3 | $ (28) | $ 0 | $ (28) | $ 0 |
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Recognized gains and losses, net | Recognized gains and losses, net | Recognized gains and losses, net | Recognized gains and losses, net |
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates) | Unrealized gain (loss) on investments and other financial instruments (excluding investments in unconsolidated affiliates) |
PALH LLC |  |  |  |  |
Liabilities |  |  |  |  |
Ownership interest prior to acquisition |  |  |  |  | 30.00%
Level 3 |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | $ 11,068 | $ 8,759 | $ 9,677 | $ 8,286 |
Balance at End of Period | 11,596 | 9,121 | 11,596 | 9,121 |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 5,398 | 4,134 | 4,661 | 3,397 |
Balance at End of Period | 6,083 | 3,850 | 6,083 | 3,850 |
Indexed annuities/indexed universal life insurance ("IUL") embedded derivatives, included in contractholder funds |  |  |  |  |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 4,848 | 3,821 | 4,258 | 3,115 |
Liabilities, Total (Losses) Gains Included in Earnings | 308 | (796) | 452 | (214) |
Liabilities, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Liabilities, Purchases | 390 | 576 | 1,011 | 765 |
Liabilities, Sales | 0 | 0 | 0 | 0 |
Liabilities, Settlements | (135) | (45) | (310) | (110) |
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0 |
Balance at End of Period | 5,411 | 3,556 | 5,411 | 3,556 |
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0 | 0 | 0 |
Interest rate swaps |  |  |  |  |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 28 | 0 | 0 | 0 |
Liabilities, Total (Losses) Gains Included in Earnings | 0 | 16 | 28 | 16 |
Liabilities, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Liabilities, Purchases | 0 | 0 | 0 | 0 |
Liabilities, Sales | 0 | 0 | 0 | 0 |
Liabilities, Settlements | 0 | 0 | 0 | 0 |
Liabilities, Net transfer In (Out) of Level 3 | (28) | 0 | (28) | 0 |
Balance at End of Period | 0 | 16 | 0 | 16 |
Change in Unrealized Gains (Losses) Included in OCI | 0 |  | 0 | 0 |
Contingent consideration |  |  |  |  |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 63 |  | 0 |  |
Liabilities, Total (Losses) Gains Included in Earnings | 6 |  | 21 |  |
Liabilities, Total (Losses) Gains Included in AOCI | 0 |  | 0 |  |
Liabilities, Purchases | 0 |  | 48 |  |
Liabilities, Sales | 0 |  | 0 |  |
Liabilities, Settlements | 0 |  | 0 |  |
Liabilities, Net transfer In (Out) of Level 3 | 0 |  | 0 |  |
Balance at End of Period | 69 |  | 69 |  |
Change in Unrealized Gains (Losses) Included in OCI | 0 |  | 0 |  |
Asset-backed securities |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 8,042 | 6,510 | 7,122 | 6,263 |
Assets, Total (Losses) Gains Included in Earnings | (3) | (45) | 12 | (56) |
Assets, Total (Losses) Gains Included in AOCI | 77 | 75 | 187 | 108 |
Assets, Purchases | 515 | 536 | 1,981 | 1,331 |
Assets, Sales | (30) | (27) | (109) | (125) |
Assets, Settlements | (358) | (171) | (904) | (557) |
Assets, Net transfer In (Out) of Level 3 | (59) | (121) | (105) | (207) |
Balance at End of Period | 8,184 | 6,757 | 8,184 | 6,757 |
Change in Unrealized Included in OCI | 77 | 75 | 184 | 107 |
Commercial mortgage-backed securities |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 15 | 17 | 18 | 37 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 1 |
Assets, Purchases | 0 | 10 | 58 | 22 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 | (15) | 0 | (76) | (33) |
Balance at End of Period | 0 | 27 | 0 | 27 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 1 |
Corporates |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 2,355 | 1,628 | 1,979 | 1,440 |
Assets, Total (Losses) Gains Included in Earnings | (2) | 0 | (2) | (1) |
Assets, Total (Losses) Gains Included in AOCI | 67 | (21) | 79 | (77) |
Assets, Purchases | 354 | 162 | 873 | 423 |
Assets, Sales | 0 | 0 | (96) | (1) |
Assets, Settlements | (43) | (24) | (85) | (43) |
Assets, Net transfer In (Out) of Level 3 | (3) | (1) | (20) | 3 |
Balance at End of Period | 2,728 | 1,744 | 2,728 | 1,744 |
Change in Unrealized Included in OCI | 64 | (21) | 77 | (77) |
Municipals |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period |  | 49 | 49 | 29 |
Assets, Total (Losses) Gains Included in Earnings |  | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI |  | (2) | 1 | 18 |
Assets, Purchases |  | 0 | 0 | 0 |
Assets, Sales |  | 0 | (50) | 0 |
Assets, Settlements |  | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 |  | 0 | 0 | 0 |
Balance at End of Period | 0 | 47 | 0 | 47 |
Change in Unrealized Included in OCI |  | (2) | 1 | 18 |
Residential mortgage-backed securities |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 3 | 28 | 3 | 302 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 1 |
Assets, Total (Losses) Gains Included in AOCI | 0 | (1) | 0 | 7 |
Assets, Purchases | 0 | 0 | 1 | 32 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | (1) | 0 | (9) |
Assets, Net transfer In (Out) of Level 3 | 0 | (23) | (1) | (330) |
Balance at End of Period | 3 | 3 | 3 | 3 |
Change in Unrealized Included in OCI | 0 | (1) | 0 | 7 |
Foreign Governments |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 5 | 16 | 16 | 16 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Assets, Purchases | 0 | 0 | 0 | 0 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | (11) | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0 |
Balance at End of Period | 5 | 16 | 5 | 16 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0 |
Preferred securities |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 8 | 7 | 8 | 1 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 1 | 0 | 1 |
Assets, Purchases | 0 | 0 | 0 | 0 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 6 |
Balance at End of Period | 8 | 8 | 8 | 8 |
Change in Unrealized Included in OCI | 0 | 1 | 0 | 1 |
Equity securities |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 13 | 14 | 15 | 10 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 1 | (2) | 1 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Assets, Purchases | 0 | 0 | 0 | 0 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 4 |
Balance at End of Period | 13 | 15 | 13 | 15 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0 |
Interest rate swaps |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 8 |  | 57 |  |
Assets, Total (Losses) Gains Included in Earnings | 0 |  | (50) |  |
Assets, Total (Losses) Gains Included in AOCI | (1) |  | 0 |  |
Assets, Purchases | 0 |  | 0 |  |
Assets, Sales | 0 |  | 0 |  |
Assets, Settlements | 0 |  | 0 |  |
Assets, Net transfer In (Out) of Level 3 | (7) |  | (7) |  |
Balance at End of Period | 0 |  | 0 |  |
Change in Unrealized Included in OCI | 0 |  | 1 |  |
Investment in unconsolidated affiliates |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 358 | 197 | 285 | 23 |
Assets, Total (Losses) Gains Included in Earnings | 6 | 0 | 79 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Assets, Purchases | 0 | 75 | 0 | 249 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 | (92) | 0 | (92) | 0 |
Balance at End of Period | 272 | 272 | 272 | 272 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0 |
Short term investments |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 71 | 126 | 0 | 0 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Assets, Purchases | 85 | 65 | 156 | 191 |
Assets, Sales | 0 | (19) | 0 | (19) |
Assets, Settlements | 0 | (103) | 0 | (103) |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0 |
Balance at End of Period | 156 | 69 | 156 | 69 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0 |
Other assets |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 50 |  | 0 |  |
Assets, Total (Losses) Gains Included in Earnings | (3) |  | (3) |  |
Assets, Total (Losses) Gains Included in AOCI | 0 |  | 0 |  |
Assets, Purchases | 8 |  | 58 |  |
Assets, Sales | 0 |  | 0 |  |
Assets, Settlements | 0 |  | 0 |  |
Assets, Net transfer In (Out) of Level 3 | 0 |  | 0 |  |
Balance at End of Period | 55 |  | 55 |  |
Change in Unrealized Included in OCI | 0 |  | 0 |  |
Available-for-sale embedded derivative |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 31 | 26 | 27 | 23 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 0 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 3 | (3) | 7 | 0 |
Assets, Purchases | 0 | 0 | 0 | 0 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | 0 | 0 | 0 | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0 |
Balance at End of Period | 34 | 23 | 34 | 23 |
Change in Unrealized Included in OCI | 3 | (3) | 7 | 0 |
Credit linked note |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 6 | 13 | 10 | 15 |
Assets, Total (Losses) Gains Included in Earnings | 0 | 0 | 1 | 0 |
Assets, Total (Losses) Gains Included in AOCI | 0 | 0 | 0 | 0 |
Assets, Purchases | 0 | 0 | 0 | 0 |
Assets, Sales | 0 | 0 | 0 | 0 |
Assets, Settlements | (2) | (1) | (7) | (3) |
Assets, Net transfer In (Out) of Level 3 | 0 | 0 | 0 | 0 |
Balance at End of Period | 4 | 12 | 4 | 12 |
Change in Unrealized Included in OCI | 0 | 0 | 0 | 0 |
Secured borrowing receivable |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period |  | 10 |  | 10 |
Assets, Total (Losses) Gains Included in Earnings |  | 0 |  | 0 |
Assets, Total (Losses) Gains Included in AOCI |  | 0 |  | 0 |
Assets, Purchases |  | 0 |  | 0 |
Assets, Sales |  | 0 |  | 0 |
Assets, Settlements |  | 0 |  | 0 |
Assets, Net transfer In (Out) of Level 3 |  | 0 |  | 0 |
Balance at End of Period |  | 10 |  | 10 |
Change in Unrealized Included in OCI |  | 0 |  | 0 |
Subtotal Level 3 assets at fair value | Level 3 |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 10,965 | 8,641 | 9,589 | 8,169 |
Assets, Total (Losses) Gains Included in Earnings | (2) | (44) | 35 | (55) |
Assets, Total (Losses) Gains Included in AOCI | 146 | 49 | 274 | 58 |
Assets, Purchases | 962 | 848 | 3,127 | 2,248 |
Assets, Sales | (30) | (46) | (255) | (145) |
Assets, Settlements | (403) | (300) | (1,007) | (715) |
Assets, Net transfer In (Out) of Level 3 | (176) | (145) | (301) | (557) |
Balance at End of Period | 11,462 | 9,003 | 11,462 | 9,003 |
Change in Unrealized Included in OCI | 144 | 49 | 270 | 57 |
Market risk benefits asset | Level 3 |  |  |  |  |
Fixed maturity securities available-for-sale: |  |  |  |  |
Balance at Beginning of Period | 103 | 118 | 88 | 117 |
Balance at End of Period | 134 | 118 | 134 | 118 |
Subtotal Level 3 liabilities at fair value |  |  |  |  |
Liabilities |  |  |  |  |
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0 | 0 | 0 |
Subtotal Level 3 liabilities at fair value | Level 3 |  |  |  |  |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 4,939 | 3,821 | 4,258 | 3,115 |
Balance at End of Period | 5,480 | 3,572 | 5,480 | 3,572 |
Market risk benefits liability | Level 3 |  |  |  |  |
Liabilities |  |  |  |  |
Balance at Beginning of Period | 459 | 313 | 403 | 282 |
Balance at End of Period | $ 603 | $ 278 | $ 603 | $ 278 |

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