Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 74,419	$ 86,527
Equity securities	75	95
Short-term investments	278	662
Derivative assets: (1)	3,852	3,298
Embedded derivatives within asset host contracts	129	186
Separate account assets	76,067	106,225
Liabilities [Abstract]
Derivative liabilities: (1)	8,989	10,444
Embedded derivatives within liability host contracts	4,277	8,800
Recurring
Assets [Abstract]
Fixed maturity securities, estimated fair value	74,419	86,527
Equity securities	75	95
Short-term investments	278	662
Derivative assets: (1)	3,723	3,112
Embedded derivatives within asset host contracts	129	186
Separate account assets	76,067	106,225
Total assets	154,691	196,807
Liabilities [Abstract]
Derivative liabilities: (1)	4,712	1,644
Embedded derivatives within liability host contracts	4,277	8,800
Total liabilities	8,989	10,444
Recurring | Interest rate
Assets [Abstract]
Derivative assets: (1)	419	1,094
Liabilities [Abstract]
Derivative liabilities: (1)	2,817	130
Recurring | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	1,077	314
Liabilities [Abstract]
Derivative liabilities: (1)	14	47
Recurring | Credit
Assets [Abstract]
Derivative assets: (1)	7	39
Liabilities [Abstract]
Derivative liabilities: (1)	11	1
Recurring | Equity market
Assets [Abstract]
Derivative assets: (1)	2,220	1,665
Liabilities [Abstract]
Derivative liabilities: (1)	1,870	1,466
Recurring | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	31,663	38,474
Recurring | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	10,058	11,605
Recurring | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,822	9,220
Recurring | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	8,280	9,168
Recurring | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,542	7,193
Recurring | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,772	4,760
Recurring | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	5,199	4,275
Recurring | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,083	1,832
Recurring | Level 1
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,886	3,159
Equity securities	11	21
Short-term investments	169	640
Derivative assets: (1)	0	0
Embedded derivatives within asset host contracts	0	0
Separate account assets	39	41
Total assets	4,105	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	3,886	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	68,604	81,723
Equity securities	36	61
Short-term investments	109	20
Derivative assets: (1)	3,657	3,074
Embedded derivatives within asset host contracts	0	0
Separate account assets	76,028	106,184
Total assets	148,434	191,062
Liabilities [Abstract]
Derivative liabilities: (1)	4,708	1,642
Embedded derivatives within liability host contracts	0	0
Total liabilities	4,708	1,642
Recurring | Level 2 | Interest rate
Assets [Abstract]
Derivative assets: (1)	419	1,094
Liabilities [Abstract]
Derivative liabilities: (1)	2,817	130
Recurring | Level 2 | Foreign currency exchange rate
Assets [Abstract]
Derivative assets: (1)	1,026	304
Liabilities [Abstract]
Derivative liabilities: (1)	14	47
Recurring | Level 2 | Credit
Assets [Abstract]
Derivative assets: (1)	1	27
Liabilities [Abstract]
Derivative liabilities: (1)	8	0
Recurring | Level 2 | Equity market
Assets [Abstract]
Derivative assets: (1)	2,211	1,649
Liabilities [Abstract]
Derivative liabilities: (1)	1,869	1,465
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	30,625	37,568
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	9,541	11,112
Recurring | Level 2 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	7,795	9,209
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Fixed maturity securities, estimated fair value	4,394	6,009
Recurring | Level 2 | CMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	6,523	7,149
Recurring | Level 2 | State and political subdivision
Assets [Abstract]
Fixed maturity securities, estimated fair value	3,772	4,760
Recurring | Level 2 | ABS
Assets [Abstract]
Fixed maturity securities, estimated fair value	4,906	4,110
Recurring | Level 2 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,048	1,806
Recurring | Level 3
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,929	1,645
Equity securities	28	13
Short-term investments	0	2
Derivative assets: (1)	66	38
Embedded derivatives within asset host contracts	129	186
Separate account assets	0	0
Total assets	2,152	1,884
Liabilities [Abstract]
Derivative liabilities: (1)	4	2
Embedded derivatives within liability host contracts	4,277	8,800
Total liabilities	4,281	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)	51	10
Liabilities [Abstract]
Derivative liabilities: (1)	0	0
Recurring | Level 3 | Credit
Assets [Abstract]
Derivative assets: (1)	6	12
Liabilities [Abstract]
Derivative liabilities: (1)	3	1
Recurring | Level 3 | Equity market
Assets [Abstract]
Derivative assets: (1)	9	16
Liabilities [Abstract]
Derivative liabilities: (1)	1	1
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	1,038	906
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Fixed maturity securities, estimated fair value	517	493
Recurring | Level 3 | RMBS
Assets [Abstract]
Fixed maturity securities, estimated fair value	27	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	19	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	293	165
Recurring | Level 3 | Foreign government
Assets [Abstract]
Fixed maturity securities, estimated fair value	$ 35	$ 26