Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 74,757	$ 86,527
Equity securities, FV-NI	66	95
Short-term investments	299	662
Derivative assets: (1)	2,388	3,298
Embedded derivatives within asset host contracts	117	186
Separate account assets	78,880	106,225
Liabilities [Abstract]
Derivative liabilities: (1)	9,499	10,444
Embedded derivatives within liability host contracts	5,588	8,800
Recurring
Assets [Abstract]
Fixed maturity securities, estimated fair value	74,757	86,527
Equity securities, FV-NI	66	95
Short-term investments	299	662
Derivative assets: (1)	2,271	3,112
Embedded derivatives within asset host contracts	117	186
Separate account assets	78,880	106,225
Total assets	156,390	196,807
Liabilities [Abstract]
Derivative liabilities: (1)	3,911	1,644
Embedded derivatives within liability host contracts	5,588	8,800
Total liabilities	9,499	10,444
Recurring | Interest rate
Assets [Abstract]
Derivative assets: (1)	304	1,094
Liabilities [Abstract]
Derivative liabilities: (1)	2,802	130
Recurring | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	732	314
Liabilities [Abstract]
Derivative liabilities: (1)	9	47
Recurring | Credit
Assets [Abstract]
Derivative assets: (1)	18	39
Liabilities [Abstract]
Derivative liabilities: (1)	2	1
Recurring | Equity market
Assets [Abstract]
Derivative assets: (1)	1,217	1,665
Liabilities [Abstract]
Derivative liabilities: (1)	1,098	1,466
Recurring | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	32,162	38,474
Recurring | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	10,492	11,605
Recurring | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,491	9,220
Recurring | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,898	9,168
Recurring | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,537	7,193
Recurring | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,741	4,760
Recurring | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	5,355	4,275
Recurring | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,081	1,832
Recurring | Level 1
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,507	3,159
Equity securities, FV-NI	12	21
Short-term investments	206	640
Derivative assets: (1)	0	0
Embedded derivatives within asset host contracts	0	0
Separate account assets	29	41
Total assets	3,754	3,861
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Embedded derivatives within liability host contracts	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 | RMBS
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	3,507	3,159
Recurring | Level 1 | CMBS
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 | ABS
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	69,060	81,723
Equity securities, FV-NI	27	61
Short-term investments	93	20
Derivative assets: (1)	2,234	3,074
Embedded derivatives within asset host contracts	0	0
Separate account assets	78,851	106,184
Total assets	150,265	191,062
Liabilities [Abstract]
Derivative liabilities: (1)	3,909	1,642
Embedded derivatives within liability host contracts	0	0
Total liabilities	3,909	1,642
Recurring | Level 2 | Interest rate
Assets [Abstract]
Derivative assets: (1)	304	1,094
Liabilities [Abstract]
Derivative liabilities: (1)	2,802	130
Recurring | Level 2 | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	703	304
Liabilities [Abstract]
Derivative liabilities: (1)	9	47
Recurring | Level 2 | Credit
Assets [Abstract]
Derivative assets: (1)	10	27
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 2 | Equity market
Assets [Abstract]
Derivative assets: (1)	1,217	1,649
Liabilities [Abstract]
Derivative liabilities: (1)	1,098	1,465
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	30,973	37,568
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	9,894	11,112
Recurring | Level 2 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,477	9,209
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	4,391	6,009
Recurring | Level 2 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,504	7,149
Recurring | Level 2 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,741	4,760
Recurring | Level 2 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	5,037	4,110
Recurring | Level 2 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,043	1,806
Recurring | Level 3
Assets [Abstract]
Fixed maturity securities, estimated fair value	2,190	1,645
Equity securities, FV-NI	27	13
Short-term investments	0	2
Derivative assets: (1)	37	38
Embedded derivatives within asset host contracts	117	186
Separate account assets	0	0
Total assets	2,371	1,884
Liabilities [Abstract]
Derivative liabilities: (1)	2	2
Embedded derivatives within liability host contracts	5,588	8,800
Total liabilities	5,590	8,802
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)	29	10
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 3 | Credit
Assets [Abstract]
Derivative assets: (1)	8	12
Liabilities [Abstract]
Derivative liabilities: (1)	2	1
Recurring | Level 3 | Equity market
Assets [Abstract]
Derivative assets: (1)	0	16
Liabilities [Abstract]
Derivative liabilities: (1)	0	1
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,189	906
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	598	493
Recurring | Level 3 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	14	11
Recurring | Level 3 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 3 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	33	44
Recurring | Level 3 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	0	0
Recurring | Level 3 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	318	165
Recurring | Level 3 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 38	$ 26