Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 76,727	$ 74,757
Equity securities	61	66
Short-term investments	507	299
Derivative assets: (1)	2,995	2,271
Market risk benefit assets	602	483
Separate account assets	81,901	78,880
Liabilities [Abstract]
Market risk benefit liabilities	9,806	10,411	$ 16,062
Derivative liabilities: (1)	3,887	3,911
Recurring
Assets [Abstract]
Fixed maturity securities, estimated fair value	76,727	74,757
Equity securities	61	66
Short-term investments	507	299
Derivative assets: (1)	2,995	2,271
Market risk benefit assets	602	483
Separate account assets	81,901	78,880
Total assets	162,793	156,756
Liabilities [Abstract]
Market risk benefit liabilities	9,806	10,411
Derivative liabilities: (1)	3,887	3,911
Embedded derivatives on index-linked annuities (2)	6,886	3,932
Total liabilities	20,579	18,254
Recurring | Interest rate
Assets [Abstract]
Derivative assets: (1)	278	304
Liabilities [Abstract]
Derivative liabilities: (1)	2,258	2,802
Recurring | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	625	732
Liabilities [Abstract]
Derivative liabilities: (1)	20	9
Recurring | Credit
Assets [Abstract]
Derivative assets: (1)	24	18
Liabilities [Abstract]
Derivative liabilities: (1)	1	2
Recurring | Equity market
Assets [Abstract]
Derivative assets: (1)	2,068	1,217
Liabilities [Abstract]
Derivative liabilities: (1)	1,608	1,098
Recurring | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	33,272	32,162
Recurring | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	10,826	10,492
Recurring | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	8,009	7,898
Recurring | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,418	7,491
Recurring | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,385	6,537
Recurring | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,021	5,355
Recurring | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,773	3,741
Recurring | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,023	1,081
Recurring | Level 1
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,495	3,507
Equity securities	11	12
Short-term investments	425	206
Derivative assets: (1)	0	0
Market risk benefit assets	0	0
Separate account assets	10	29
Total assets	3,941	3,754
Liabilities [Abstract]
Market risk benefit liabilities	0	0
Derivative liabilities: (1)	0	0
Embedded derivatives on index-linked annuities (2)	0	0
Total liabilities	0	0
Recurring | Level 1 | Interest rate
Assets [Abstract]
Derivative assets: (1)	0	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 1 | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	0	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 1 | Credit
Assets [Abstract]
Derivative assets: (1)	0	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 1 | Equity market
Assets [Abstract]
Derivative assets: (1)	0	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 1 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,495	3,507
Recurring | Level 1 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 1 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 2
Assets [Abstract]
Fixed maturity securities, estimated fair value	70,892	69,060
Equity securities	26	27
Short-term investments	82	93
Derivative assets: (1)	2,967	2,234
Market risk benefit assets	0	0
Separate account assets	81,891	78,851
Total assets	155,858	150,265
Liabilities [Abstract]
Market risk benefit liabilities	0	0
Derivative liabilities: (1)	3,886	3,909
Embedded derivatives on index-linked annuities (2)	0	0
Total liabilities	3,886	3,909
Recurring | Level 2 | Interest rate
Assets [Abstract]
Derivative assets: (1)	278	304
Liabilities [Abstract]
Derivative liabilities: (1)	2,258	2,802
Recurring | Level 2 | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	608	703
Liabilities [Abstract]
Derivative liabilities: (1)	20	9
Recurring | Level 2 | Credit
Assets [Abstract]
Derivative assets: (1)	17	10
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 2 | Equity market
Assets [Abstract]
Derivative assets: (1)	2,064	1,217
Liabilities [Abstract]
Derivative liabilities: (1)	1,608	1,098
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	31,945	30,973
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	10,222	9,894
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	4,514	4,391
Recurring | Level 2 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,404	7,477
Recurring | Level 2 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,349	6,504
Recurring | Level 2 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	5,700	5,037
Recurring | Level 2 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,773	3,741
Recurring | Level 2 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	985	1,043
Recurring | Level 3
Assets [Abstract]
Fixed maturity securities, estimated fair value	2,340	2,190
Equity securities	24	27
Short-term investments	0	0
Derivative assets: (1)	28	37
Market risk benefit assets		483
Separate account assets	0	0
Total assets	2,994	2,737
Liabilities [Abstract]
Market risk benefit liabilities		10,411
Derivative liabilities: (1)	1	2
Embedded derivatives on index-linked annuities (2)	6,886	3,932
Total liabilities	16,693	14,345
Recurring | Level 3 | Interest rate
Assets [Abstract]
Derivative assets: (1)	0	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 3 | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	17	29
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 3 | Credit
Assets [Abstract]
Derivative assets: (1)	7	8
Liabilities [Abstract]
Derivative liabilities: (1)	1	2
Recurring | Level 3 | Equity market
Assets [Abstract]
Derivative assets: (1)	4	0
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,327	1,189
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	604	598
Recurring | Level 3 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 3 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	14	14
Recurring | Level 3 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	36	33
Recurring | Level 3 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	321	318
Recurring | Level 3 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 3 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 38	$ 38