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Fair Value of Financial Instruments - Changes to Fair Value of Financial Instruments Level 3 (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Liabilities |  |
Liabilities, Total Gains (Losses) Included in Earnings | $ 228 | $ 385
Liabilities, Total Gains (Losses) Included in AOCI | 0 | 0
Liabilities, Purchases | 336 | 96
Liabilities, Sales | 0 | 0
Liabilities, Settlements | (67) | (27)
Liabilities, Net transfer In (Out) of Level 3 | $ 0 | $ 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
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] | Unrealized (loss) gain on investments and other financial instruments, net of adjustments to intangible assets and unearned revenue (excluding investments in unconsolidated affiliates) | Unrealized (loss) gain on investments and other financial instruments, net of adjustments to intangible assets and unearned revenue (excluding investments in unconsolidated affiliates)
Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | $ 9,677 | $ 8,286
Balance at End of Period | 10,476 | 8,229
Liabilities |  |
Balance at Beginning of Period | 4,661 | 3,397
Balance at End of Period | 5,180 | 3,893
Indexed annuities/IUL embedded derivatives, included in contractholder funds |  |
Liabilities |  |
Balance at Beginning of Period | 4,258 | 3,115
Liabilities, Total Gains (Losses) Included in Earnings | 200 | 385
Liabilities, Total Gains (Losses) Included in AOCI | 0 | 0
Liabilities, Purchases | 288 | 96
Liabilities, Sales | 0 | 0
Liabilities, Settlements | (67) | (27)
Liabilities, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 4,679 | 3,569
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0
Interest Rate Swaps |  |
Liabilities |  |
Balance at Beginning of Period | 0 |
Liabilities, Total Gains (Losses) Included in Earnings | 19 |
Liabilities, Total Gains (Losses) Included in AOCI | 0 |
Liabilities, Purchases | 0 |
Liabilities, Sales | 0 |
Liabilities, Settlements | 0 |
Liabilities, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 19 |
Change in Unrealized Gains (Losses) Included in OCI | 0 |
Contingent consideration |  |
Liabilities |  |
Balance at Beginning of Period | 0 |
Liabilities, Total Gains (Losses) Included in Earnings | 9 |
Liabilities, Total Gains (Losses) Included in AOCI | 0 |
Liabilities, Purchases | 48 |
Liabilities, Sales | 0 |
Liabilities, Settlements | 0 |
Liabilities, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 57 |
Change in Unrealized Gains (Losses) Included in OCI | 0 |
Asset-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 7,122 | 6,263
Assets, Total Gains (Losses) Included in Earnings | (12) | (8)
Assets, Total Gains (Losses) Included in AOCI | 104 | 18
Assets, Purchases | 762 | 416
Assets, Sales | (19) | (83)
Assets, Settlements | (202) | (235)
Assets, Net transfer In (Out) of Level 3 | (19) | (71)
Balance at End of Period | 7,736 | 6,300
Change in Unrealized Included in OCI | 104 | 18
Commercial mortgage-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 18 | 37
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 1
Assets, Purchases | 1 | 12
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | (7) | (21)
Balance at End of Period | 12 | 29
Change in Unrealized Included in OCI | 0 | 1
Corporates |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 1,979 | 1,440
Assets, Total Gains (Losses) Included in Earnings | 0 | (1)
Assets, Total Gains (Losses) Included in AOCI | 13 | (23)
Assets, Purchases | 217 | 133
Assets, Sales | (3) | 0
Assets, Settlements | (22) | (5)
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 2,184 | 1,544
Change in Unrealized Included in OCI | 13 | (23)
Municipals |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 49 | 29
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 1 | 3
Assets, Purchases | 0 | 0
Assets, Sales | (32) | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 18 | 32
Change in Unrealized Included in OCI | 1 | 3
Residential mortgage-backed securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 3 | 302
Assets, Total Gains (Losses) Included in Earnings | 0 | 1
Assets, Total Gains (Losses) Included in AOCI | 0 | 8
Assets, Purchases | 1 | 8
Assets, Sales | 0 | 0
Assets, Settlements | 0 | (8)
Assets, Net transfer In (Out) of Level 3 | 0 | (299)
Balance at End of Period | 4 | 12
Change in Unrealized Included in OCI | 0 | 8
Foreign Governments |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 16 | 16
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | (11) | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 5 | 16
Change in Unrealized Included in OCI | 0 | 0
Preferred securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 8 | 1
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) 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 | 8 | 1
Change in Unrealized Included in OCI | 0 | 0
Equity securities |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 15 | 10
Assets, Total Gains (Losses) Included in Earnings | (1) | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0
Assets, Purchases | 0 | 1
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 14 | 11
Change in Unrealized Included in OCI | 0 | 0
Interest Rate Swaps |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 57 |
Assets, Total Gains (Losses) Included in Earnings | (48) |
Assets, Total Gains (Losses) Included in AOCI | 0 |
Assets, Purchases | 0 |
Assets, Sales | 0 |
Assets, Settlements | 0 |
Assets, Net transfer In (Out) of Level 3 | 0 |
Balance at End of Period | 9 |
Change in Unrealized Included in OCI | 0 |
Investment in unconsolidated affiliates |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 285 | 23
Assets, Total Gains (Losses) Included in Earnings | 58 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0
Assets, Purchases | 0 | 84
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 343 | 107
Change in Unrealized Included in OCI | 0 | 0
Short term investments |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 0 | 0
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0
Assets, Purchases | 9 | 23
Assets, Sales | 0 | 0
Assets, Settlements | 0 | 0
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 9 | 23
Change in Unrealized Included in OCI | 0 | 0
Available-for-sale embedded derivative |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 27 | 23
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 3 | 2
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 | 30 | 25
Change in Unrealized Included in OCI | 3 | 2
Credit linked note |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 10 | 15
Assets, Total Gains (Losses) Included in Earnings | 0 | 0
Assets, Total Gains (Losses) Included in AOCI | 0 | 0
Assets, Purchases | 0 | 0
Assets, Sales | 0 | 0
Assets, Settlements | (1) | (2)
Assets, Net transfer In (Out) of Level 3 | 0 | 0
Balance at End of Period | 9 | 13
Change in Unrealized Included in OCI | 0 | 0
Secured borrowing receivable |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period |  | 10
Assets, Total Gains (Losses) Included in Earnings |  | 0
Assets, Total Gains (Losses) Included in AOCI |  | 0
Assets, Purchases |  | 0
Assets, Sales |  | 0
Assets, Settlements |  | 0
Assets, Net transfer In (Out) of Level 3 |  | 0
Balance at End of Period |  | 10
Change in Unrealized Included in OCI |  | 0
Subtotal Level 3 assets at fair value | Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 9,589 | 8,169
Assets, Total Gains (Losses) Included in Earnings | (3) | (8)
Assets, Total Gains (Losses) Included in AOCI | 121 | 9
Assets, Purchases | 990 | 677
Assets, Sales | (54) | (83)
Assets, Settlements | (236) | (250)
Assets, Net transfer In (Out) of Level 3 | (26) | (391)
Balance at End of Period | 10,381 | 8,123
Change in Unrealized Included in OCI | 121 | 9
Market risk benefits asset |  |
Fixed maturity securities available-for-sale: |  |
Balance at End of Period | 95 |
Market risk benefits asset | Level 3 |  |
Fixed maturity securities available-for-sale: |  |
Balance at Beginning of Period | 88 | 117
Balance at End of Period |  | 106
Subtotal Level 3 liabilities at fair value |  |
Liabilities |  |
Change in Unrealized Gains (Losses) Included in OCI | 0 | 0
Subtotal Level 3 liabilities at fair value | Level 3 |  |
Liabilities |  |
Balance at Beginning of Period | 4,258 | 3,115
Balance at End of Period | 4,755 | 3,569
Market risk benefits liability | Level 3 |  |
Liabilities |  |
Balance at Beginning of Period | 403 | 282
Balance at End of Period | $ 425 | $ 324

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