Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	$ 340,274	$ 354,809
Equity securities	1,269	1,079
Contractholder-directed equity securities and fair value option securities, at estimated fair value	12,142	13,319
Short-term investments (3)	7,176	3,904
Residential mortgage loans — FVO	79,353	83,919
Derivative assets	10,466	11,866
Separate account assets	179,873	199,970
Liabilities [Abstract]
Derivative liabilities	3,852	4,229
Embedded derivatives within liability host contracts	649	1,196
Separate account liabilities	179,873	199,970
Residential mortgage loans - FVO
Assets [Abstract]
Residential mortgage loans — FVO	127	165
Recurring
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	340,274	354,809
Equity securities	1,269	1,079
Contractholder-directed equity securities and fair value option securities, at estimated fair value	12,142	13,319
Short-term investments (3)	6,560	3,373
Other investments	959	885
Derivative assets	10,466	11,866
Embedded derivatives within asset host contracts	38	55
Separate account assets	179,873	199,970
Total assets (7)	551,708	585,521
Liabilities [Abstract]
Derivative liabilities	3,852	4,229
Embedded derivatives within liability host contracts	649	1,196
Total liabilities	4,526	5,451
Recurring | Interest rate contracts
Assets [Abstract]
Derivative assets	6,678	8,329
Liabilities [Abstract]
Derivative liabilities	281	238
Recurring | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	2,554	2,466
Liabilities [Abstract]
Derivative liabilities	2,920	3,101
Recurring | Credit contracts
Assets [Abstract]
Derivative assets	190	205
Liabilities [Abstract]
Derivative liabilities	125	121
Recurring | Equity market contracts
Assets [Abstract]
Derivative assets	1,044	866
Liabilities [Abstract]
Derivative liabilities	526	769
Recurring | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	25	26
Recurring | Residential mortgage loans - FVO
Assets [Abstract]
Residential mortgage loans — FVO	127	165
Recurring | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	93,034	93,416
Recurring | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	61,609	71,699
Recurring | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	63,640	69,408
Recurring | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	46,599	47,100
Recurring | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	30,404	30,435
Recurring | ABS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	18,569	17,119
Recurring | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,212	13,722
Recurring | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	12,207	11,910
Recurring | Level 1
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	25,489	23,180
Equity securities	931	636
Contractholder-directed equity securities and fair value option securities, at estimated fair value	9,173	10,559
Short-term investments (3)	5,607	2,762
Other investments	0	83
Derivative assets	16	17
Embedded derivatives within asset host contracts	0	0
Separate account assets	76,312	91,850
Total assets (7)	117,528	129,087
Liabilities [Abstract]
Derivative liabilities	7	40
Embedded derivatives within liability host contracts	0	0
Total liabilities	14	52
Recurring | Level 1 | Interest rate contracts
Assets [Abstract]
Derivative assets	4	0
Liabilities [Abstract]
Derivative liabilities	0	2
Recurring | Level 1 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	0	3
Liabilities [Abstract]
Derivative liabilities	2	0
Recurring | Level 1 | Credit contracts
Assets [Abstract]
Derivative assets	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 1 | Equity market contracts
Assets [Abstract]
Derivative assets	12	14
Liabilities [Abstract]
Derivative liabilities	5	38
Recurring | Level 1 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	7	12
Recurring | Level 1 | Residential mortgage loans - FVO
Assets [Abstract]
Residential mortgage loans — FVO	0	0
Recurring | Level 1 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	25,482	23,180
Recurring | Level 1 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	7	0
Recurring | Level 1 | ABS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 2
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	283,388	302,122
Equity securities	187	293
Contractholder-directed equity securities and fair value option securities, at estimated fair value	2,068	2,059
Short-term investments (3)	950	568
Other investments	61	229
Derivative assets	10,326	11,137
Embedded derivatives within asset host contracts	0	0
Separate account assets	101,424	107,035
Total assets (7)	398,404	423,443
Liabilities [Abstract]
Derivative liabilities	3,569	4,071
Embedded derivatives within liability host contracts	0	0
Total liabilities	3,581	4,079
Recurring | Level 2 | Interest rate contracts
Assets [Abstract]
Derivative assets	6,577	7,840
Liabilities [Abstract]
Derivative liabilities	259	168
Recurring | Level 2 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	2,551	2,287
Liabilities [Abstract]
Derivative liabilities	2,676	3,063
Recurring | Level 2 | Credit contracts
Assets [Abstract]
Derivative assets	173	180
Liabilities [Abstract]
Derivative liabilities	113	121
Recurring | Level 2 | Equity market contracts
Assets [Abstract]
Derivative assets	1,025	830
Liabilities [Abstract]
Derivative liabilities	521	719
Recurring | Level 2 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	12	8
Recurring | Level 2 | Residential mortgage loans - FVO
Assets [Abstract]
Residential mortgage loans — FVO	0	0
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	81,266	83,214
Recurring | Level 2 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	61,518	71,582
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	49,973	55,509
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	21,117	23,920
Recurring | Level 2 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	27,270	27,133
Recurring | Level 2 | ABS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,707	15,734
Recurring | Level 2 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,212	13,722
Recurring | Level 2 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	11,325	11,308
Recurring | Level 3
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	31,397	29,507
Equity securities	151	150
Contractholder-directed equity securities and fair value option securities, at estimated fair value	901	701
Short-term investments (3)	3	43
Other investments	898	573
Derivative assets	124	712
Embedded derivatives within asset host contracts	38	55
Separate account assets	2,137	1,085
Total assets (7)	35,776	32,991
Liabilities [Abstract]
Derivative liabilities	276	118
Embedded derivatives within liability host contracts	649	1,196
Total liabilities	931	1,320
Recurring | Level 3 | Interest rate contracts
Assets [Abstract]
Derivative assets	97	489
Liabilities [Abstract]
Derivative liabilities	22	68
Recurring | Level 3 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	3	176
Liabilities [Abstract]
Derivative liabilities	242	38
Recurring | Level 3 | Credit contracts
Assets [Abstract]
Derivative assets	17	25
Liabilities [Abstract]
Derivative liabilities	12	0
Recurring | Level 3 | Equity market contracts
Assets [Abstract]
Derivative assets	7	22
Liabilities [Abstract]
Derivative liabilities	0	12
Recurring | Level 3 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	6	6
Recurring | Level 3 | Residential mortgage loans - FVO
Assets [Abstract]
Residential mortgage loans — FVO	127	165
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	11,768	10,202
Recurring | Level 3 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	91	117
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	13,667	13,899
Recurring | Level 3 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 3 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	3,127	3,302
Recurring | Level 3 | ABS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	1,862	1,385
Recurring | Level 3 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 3 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	882	602
Other limited partnership interests | Recurring
Assets [Abstract]
Investments, Fair Value Disclosure	$ 99	$ 75