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Fair Value of Financial Instruments - Carrying Amounts of Assets and Liabilities at Estimated Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	$ 42,373	$ 33,095
Derivative investments	797	244
Market risk benefits assets	88	117	$ 41
Total financial assets at fair value	1,312	1,112
Derivatives:
Market risk benefits liability	403	282	$ 469
Level 1
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	2,767	2,286
Derivative investments	0	0
Investment in unconsolidated affiliates	0
Short term investments	2,111	2,590
Market risk benefits assets	0	0
Total financial assets at fair value	6,566	6,210
Derivatives:
Market risk benefits liability	0	0
Total financial liabilities at fair value	1	0
Level 2
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	0	0
Derivative investments	740	244
Investment in unconsolidated affiliates	0
Short term investments	8	0
Market risk benefits assets	0	0
Total financial assets at fair value	33,703	25,720
Derivatives:
Market risk benefits liability	0	0
Total financial liabilities at fair value	0	0
Level 3
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	0	0
Derivative investments	57	0
Investment in unconsolidated affiliates	285
Short term investments	0	0
Market risk benefits assets	88	117
Total financial assets at fair value	9,677	8,286
Derivatives:
Market risk benefits liability	403	282
Total financial liabilities at fair value	4,661	3,397
NAV
Assets, Fair Value Disclosure [Abstract]
Total financial assets at fair value	59	47
Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Cash and cash equivalents	2,767	2,286
Derivative investments	797	244
Investment in unconsolidated affiliates	285
Short term investments	2,119	2,590
Market risk benefits assets	88	117
Total financial assets at fair value	50,005	40,263
Derivatives:
Market risk benefits liability	403	282
Total financial liabilities at fair value	4,662	3,397
Reinsurance related embedded derivatives | Level 1
Assets, Fair Value Disclosure [Abstract]
Derivative investments	0
Reinsurance related embedded derivatives | Level 2
Assets, Fair Value Disclosure [Abstract]
Derivative investments	152
Reinsurance related embedded derivatives | Level 3
Assets, Fair Value Disclosure [Abstract]
Derivative investments	0
Reinsurance related embedded derivatives | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Derivative investments	152
FIA/ IUL embedded derivatives, included in contractholder funds | Level 1
Derivatives:
Derivative liability	0	0
FIA/ IUL embedded derivatives, included in contractholder funds | Level 2
Derivatives:
Derivative liability	0	0
FIA/ IUL embedded derivatives, included in contractholder funds | Level 3
Derivatives:
Derivative liability	4,258	3,115
FIA/ IUL embedded derivatives, included in contractholder funds | Total Estimated Fair Value
Derivatives:
Derivative liability	4,258	3,115
Reinsurance related embedded derivative, included in other assets | Level 1
Assets, Fair Value Disclosure [Abstract]
Derivative investments		0
Reinsurance related embedded derivative, included in other assets | Level 2
Assets, Fair Value Disclosure [Abstract]
Derivative investments		279
Reinsurance related embedded derivative, included in other assets | Level 3
Assets, Fair Value Disclosure [Abstract]
Derivative investments		0
Reinsurance related embedded derivative, included in other assets | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Derivative investments		279
Futures contracts | Level 1
Derivatives:
Derivative liability	1
Futures contracts | Level 2
Derivatives:
Derivative liability	0
Futures contracts | Level 3
Derivatives:
Derivative liability	0
Futures contracts | Total Estimated Fair Value
Derivatives:
Derivative liability	1
Asset-backed securities
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	14,342	11,467
Asset-backed securities | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Asset-backed securities | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	7,220	5,204
Asset-backed securities | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	7,122	6,263
Asset-backed securities | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	14,342	11,467
Commercial mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	4,475	3,063
Commercial mortgage-backed securities | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Commercial mortgage-backed securities | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	4,457	3,026
Commercial mortgage-backed securities | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	18	37
Commercial mortgage-backed securities | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	4,475	3,063
Corporates
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	17,896	14,337
Corporates | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	25	40
Corporates | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	15,892	12,857
Corporates | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,979	1,440
Corporates | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	17,896	14,337
Hybrids
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	618	731
Hybrids | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	95	93
Hybrids | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	523	638
Hybrids | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Hybrids | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	618	731
Municipals | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Municipals | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,562	1,431
Municipals | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	49	29
Municipals | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	1,611	1,460
Residential mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	2,429	1,527
Residential mortgage-backed securities | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Residential mortgage-backed securities | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	2,426	1,225
Residential mortgage-backed securities | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	3	302
Residential mortgage-backed securities | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	2,429	1,527
U.S. Government
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	678	271
U.S. Government | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	662	260
U.S. Government | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	16	11
U.S. Government | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
U.S. Government | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	678	271
Foreign Governments
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	324	239
Foreign Governments | Level 1
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	0	0
Foreign Governments | Level 2
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	308	223
Foreign Governments | Level 3
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	16	16
Foreign Governments | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Fixed maturity securities available-for-sale	324	239
Equity securities | Level 1
Assets, Fair Value Disclosure [Abstract]
Equity securities	692	621
Equity securities | Level 2
Assets, Fair Value Disclosure [Abstract]
Equity securities	0	0
Equity securities | Level 3
Assets, Fair Value Disclosure [Abstract]
Equity securities	15	10
Equity securities | NAV
Assets, Fair Value Disclosure [Abstract]
Equity securities	59	47
Equity securities | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Equity securities	766	678
Preferred securities
Assets, Fair Value Disclosure [Abstract]
Equity securities	621	903
Preferred securities | Level 1
Assets, Fair Value Disclosure [Abstract]
Equity securities	214	320
Preferred securities | Level 2
Assets, Fair Value Disclosure [Abstract]
Equity securities	399	582
Preferred securities | Level 3
Assets, Fair Value Disclosure [Abstract]
Equity securities	8	1
Preferred securities | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Equity securities	621	903
Investment in unconsolidated affiliates | Level 1
Assets, Fair Value Disclosure [Abstract]
Investment in unconsolidated affiliates		0
Investment in unconsolidated affiliates | Level 2
Assets, Fair Value Disclosure [Abstract]
Investment in unconsolidated affiliates		0
Investment in unconsolidated affiliates | Level 3
Assets, Fair Value Disclosure [Abstract]
Investment in unconsolidated affiliates		23
Investment in unconsolidated affiliates | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Investment in unconsolidated affiliates		23
Other long-term investments | Level 1
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	0	0
Other long-term investments | Level 2
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	0	0
Other long-term investments | Level 3
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	37	48
Other long-term investments | Total Estimated Fair Value
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	$ 37	$ 48

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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