Fair Value of Financial Instruments - Carrying Amounts of Assets and Liabilities at Estimated Fair Value Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Fixed maturity securities available for sale	$ 38,029	$ 33,095
Derivative asset	649	244
Market risk benefits asset	118	117	$ 41
Total financial assets at fair value	8,759	8,286
Derivatives:
Market risk benefits liability	313	282	$ 469
Level 1
Assets
Cash and cash equivalents	3,136	2,286
Short term investments	801	2,590
Derivative asset	0	0
Market risk benefits asset	0	0
Total financial assets at fair value	5,437	6,210
Derivatives:
Market risk benefits liability	0	0
Total financial liabilities at fair value	0	0
Level 2
Assets
Cash and cash equivalents	0	0
Short term investments	45	0
Derivative asset	649	244
Market risk benefits asset	0	0
Total financial assets at fair value	30,694	25,720
Derivatives:
Market risk benefits liability	0	0
Total financial liabilities at fair value	0	0
Level 3
Assets
Cash and cash equivalents	0	0
Short term investments	126	0
Derivative asset	0	0
Market risk benefits asset	118	117
Total financial assets at fair value	8,759	8,286
Derivatives:
Market risk benefits liability	313	282
Total financial liabilities at fair value	4,134	3,397
NAV
Assets
Total financial assets at fair value	41	47
Fair Value
Assets
Cash and cash equivalents	3,136	2,286
Short term investments	972	2,590
Derivative asset	649	244
Market risk benefits asset	118	117
Total financial assets at fair value	44,931	40,263
Derivatives:
Market risk benefits liability	313	282
Total financial liabilities at fair value	4,134	3,397
Reinsurance related embedded derivative, included in other assets | Level 1
Assets
Derivative asset	0	0
Reinsurance related embedded derivative, included in other assets | Level 2
Assets
Derivative asset	277	279
Reinsurance related embedded derivative, included in other assets | Level 3
Assets
Derivative asset	0	0
Reinsurance related embedded derivative, included in other assets | Fair Value
Assets
Derivative asset	277	279
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	3,821	3,115
FIA/ IUL embedded derivatives, included in contractholder funds | Fair Value
Derivatives:
Derivative liability	3,821	3,115
Asset-backed securities
Assets
Fixed maturity securities available for sale	12,840	11,467
Asset-backed securities | Level 1
Assets
Fixed maturity securities available for sale	0	0
Asset-backed securities | Level 2
Assets
Fixed maturity securities available for sale	6,330	5,204
Asset-backed securities | Level 3
Assets
Fixed maturity securities available for sale	6,510	6,263
Asset-backed securities | Fair Value
Assets
Fixed maturity securities available for sale	12,840	11,467
Commercial mortgage-backed securities
Assets
Fixed maturity securities available for sale	3,989	3,063
Commercial mortgage-backed securities | Level 1
Assets
Fixed maturity securities available for sale	0	0
Commercial mortgage-backed securities | Level 2
Assets
Fixed maturity securities available for sale	3,972	3,026
Commercial mortgage-backed securities | Level 3
Assets
Fixed maturity securities available for sale	17	37
Commercial mortgage-backed securities | Fair Value
Assets
Fixed maturity securities available for sale	3,989	3,063
Corporates
Assets
Fixed maturity securities available for sale	16,129	14,337
Corporates | Level 1
Assets
Fixed maturity securities available for sale	26	40
Corporates | Level 2
Assets
Fixed maturity securities available for sale	14,475	12,857
Corporates | Level 3
Assets
Fixed maturity securities available for sale	1,628	1,440
Corporates | Fair Value
Assets
Fixed maturity securities available for sale	16,129	14,337
Hybrids
Assets
Fixed maturity securities available for sale	704	731
Hybrids | Level 1
Assets
Fixed maturity securities available for sale	95	93
Hybrids | Level 2
Assets
Fixed maturity securities available for sale	609	638
Hybrids | Level 3
Assets
Fixed maturity securities available for sale	0	0
Hybrids | Fair Value
Assets
Fixed maturity securities available for sale	704	731
Municipals | Level 1
Assets
Fixed maturity securities available for sale	0	0
Municipals | Level 2
Assets
Fixed maturity securities available for sale	1,554	1,431
Municipals | Level 3
Assets
Fixed maturity securities available for sale	49	29
Municipals | Fair Value
Assets
Fixed maturity securities available for sale	1,603	1,460
Residential mortgage-backed securities
Assets
Fixed maturity securities available for sale	2,016	1,527
Residential mortgage-backed securities | Level 1
Assets
Fixed maturity securities available for sale	0	0
Residential mortgage-backed securities | Level 2
Assets
Fixed maturity securities available for sale	1,988	1,225
Residential mortgage-backed securities | Level 3
Assets
Fixed maturity securities available for sale	28	302
Residential mortgage-backed securities | Fair Value
Assets
Fixed maturity securities available for sale	2,016	1,527
U.S. Government
Assets
Fixed maturity securities available for sale	484	271
U.S. Government | Level 1
Assets
Fixed maturity securities available for sale	468	260
U.S. Government | Level 2
Assets
Fixed maturity securities available for sale	16	11
U.S. Government | Level 3
Assets
Fixed maturity securities available for sale	0	0
U.S. Government | Fair Value
Assets
Fixed maturity securities available for sale	484	271
Foreign Governments
Assets
Fixed maturity securities available for sale	264	239
Foreign Governments | Level 1
Assets
Fixed maturity securities available for sale	0	0
Foreign Governments | Level 2
Assets
Fixed maturity securities available for sale	248	223
Foreign Governments | Level 3
Assets
Fixed maturity securities available for sale	16	16
Foreign Governments | Fair Value
Assets
Fixed maturity securities available for sale	264	239
Preferred securities
Assets
Equity and preferred securities	804	903
Preferred securities | Level 1
Assets
Equity and preferred securities	266	320
Preferred securities | Level 2
Assets
Equity and preferred securities	531	582
Preferred securities | Level 3
Assets
Equity and preferred securities	7	1
Preferred securities | Fair Value
Assets
Equity and preferred securities	804	903
Equity securities | Level 1
Assets
Equity and preferred securities	645	621
Equity securities | Level 2
Assets
Equity and preferred securities	0	0
Equity securities | Level 3
Assets
Equity and preferred securities	14	10
Equity securities | NAV
Assets
Equity and preferred securities	41	47
Equity securities | Fair Value
Assets
Equity and preferred securities	700	678
Investment in unconsolidated affiliates | Level 1
Assets
Investment in unconsolidated affiliates	0	0
Investment in unconsolidated affiliates | Level 2
Assets
Investment in unconsolidated affiliates	0	0
Investment in unconsolidated affiliates | Level 3
Assets
Investment in unconsolidated affiliates	197	23
Investment in unconsolidated affiliates | Fair Value
Assets
Investment in unconsolidated affiliates	197	23
Other long-term investments | Level 1
Assets
Other long-term investments	0	0
Other long-term investments | Level 2
Assets
Other long-term investments	0	0
Other long-term investments | Level 3
Assets
Other long-term investments	49	48
Other long-term investments | Fair Value
Assets
Other long-term investments	$ 49	$ 48