Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	$ 281,043	$ 281,412
Equity securities	712	757
Unit-linked and FVO securities (1)	10,672	10,331
Short-term investments (2)	5,156	6,045
Derivative assets	8,212	8,737
Market risk benefits, at estimated fair value	372	286
Separate account assets	139,504	144,634
Liabilities [Abstract]
Derivative liabilities	7,259	6,298
Embedded derivatives within liability host contracts (7)	9	93
Market risk benefits, at estimated fair value	2,581	3,179
Separate account liabilities	139,504	144,634
Recurring
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	281,043	281,412
Equity securities	712	757
Unit-linked and FVO securities (1)	10,672	10,331
Short-term investments (2)	4,834	5,797
Other investments	1,110	1,386
Derivative assets	8,212	8,737
Market risk benefits, at estimated fair value	372	286
Reinsured MRB assets	12	18
Separate account assets	139,504	144,634
Total assets (6)	446,471	453,358
Liabilities [Abstract]
Derivative liabilities	7,259	6,298
Embedded derivatives within liability host contracts (7)	9	93
Market risk benefits, at estimated fair value	2,581	3,179
Total liabilities	9,851	9,578
Recurring | Interest rate contracts
Assets [Abstract]
Derivative assets	3,005	3,675
Liabilities [Abstract]
Derivative liabilities	3,464	2,984
Recurring | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	4,709	4,418
Liabilities [Abstract]
Derivative liabilities	3,452	2,744
Recurring | Credit contracts
Assets [Abstract]
Derivative assets	215	236
Liabilities [Abstract]
Derivative liabilities	72	84
Recurring | Equity market contracts
Assets [Abstract]
Derivative assets	283	408
Liabilities [Abstract]
Derivative liabilities	271	486
Recurring | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	2	8
Recurring | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	79,374	80,717
Recurring | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	53,759	55,444
Recurring | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	40,250	45,489
Recurring | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	34,421	29,096
Recurring | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	33,428	32,252
Recurring | ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	20,591	17,294
Recurring | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,873	11,171
Recurring | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,347	9,949
Recurring | Level 1
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,675	15,330
Equity securities	415	429
Unit-linked and FVO securities (1)	7,306	7,520
Short-term investments (2)	4,127	5,103
Other investments	37	48
Derivative assets	11	11
Market risk benefits, at estimated fair value	0	0
Reinsured MRB assets	0	0
Separate account assets	63,979	66,229
Total assets (6)	92,550	94,670
Liabilities [Abstract]
Derivative liabilities	7	16
Embedded derivatives within liability host contracts (7)	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	7	20
Recurring | Level 1 | Interest rate contracts
Assets [Abstract]
Derivative assets	1	1
Liabilities [Abstract]
Derivative liabilities	1	5
Recurring | Level 1 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	1	2
Liabilities [Abstract]
Derivative liabilities	0	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	9	8
Liabilities [Abstract]
Derivative liabilities	6	11
Recurring | Level 1 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	0	4
Recurring | Level 1 | U.S. corporate
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 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 1 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	3
Recurring | Level 1 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,675	15,327
Recurring | Level 1 | ABS & CLO
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	229,176	233,135
Equity securities	61	79
Unit-linked and FVO securities (1)	2,176	1,708
Short-term investments (2)	702	667
Other investments	63	363
Derivative assets	8,184	8,688
Market risk benefits, at estimated fair value	0	0
Reinsured MRB assets	0	0
Separate account assets	74,535	77,258
Total assets (6)	314,897	321,898
Liabilities [Abstract]
Derivative liabilities	7,240	6,101
Embedded derivatives within liability host contracts (7)	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	7,242	6,105
Recurring | Level 2 | Interest rate contracts
Assets [Abstract]
Derivative assets	3,004	3,674
Liabilities [Abstract]
Derivative liabilities	3,463	2,805
Recurring | Level 2 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	4,694	4,393
Liabilities [Abstract]
Derivative liabilities	3,440	2,737
Recurring | Level 2 | Credit contracts
Assets [Abstract]
Derivative assets	215	228
Liabilities [Abstract]
Derivative liabilities	72	84
Recurring | Level 2 | Equity market contracts
Assets [Abstract]
Derivative assets	271	393
Liabilities [Abstract]
Derivative liabilities	265	475
Recurring | Level 2 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	2	4
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	67,333	67,003
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	39,295	40,813
Recurring | Level 2 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	40,209	45,438
Recurring | Level 2 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	32,771	27,495
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,753	16,925
Recurring | Level 2 | ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,755	15,191
Recurring | Level 2 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,866	11,171
Recurring | Level 2 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	8,194	9,099
Recurring | Level 3
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	35,192	32,947
Equity securities	236	249
Unit-linked and FVO securities (1)	1,190	1,103
Short-term investments (2)	5	27
Other investments	1,010	975
Derivative assets	17	38
Market risk benefits, at estimated fair value	372	286
Reinsured MRB assets	12	18
Separate account assets	990	1,147
Total assets (6)	39,024	36,790
Liabilities [Abstract]
Derivative liabilities	12	181
Embedded derivatives within liability host contracts (7)	9	93
Market risk benefits, at estimated fair value	2,581	3,179
Total liabilities	2,602	3,453
Recurring | Level 3 | Interest rate contracts
Assets [Abstract]
Derivative assets	0	0
Liabilities [Abstract]
Derivative liabilities	0	174
Recurring | Level 3 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	14	23
Liabilities [Abstract]
Derivative liabilities	12	7
Recurring | Level 3 | Credit contracts
Assets [Abstract]
Derivative assets	0	8
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Equity market contracts
Assets [Abstract]
Derivative assets	3	7
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Derivative Liabilities Within Separate Accounts
Liabilities [Abstract]
Separate account liabilities	0	0
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	12,041	13,714
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,464	14,631
Recurring | Level 3 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	41	51
Recurring | Level 3 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	1,650	1,598
Recurring | Level 3 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	0
Recurring | Level 3 | ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	5,836	2,103
Recurring | Level 3 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	7	0
Recurring | Level 3 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	1,153	850
Other limited partnership interests | Recurring
Assets [Abstract]
Investments, Fair Value Disclosure	$ 50	$ 52