Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	$ 298,737	$ 281,043
Equity securities	790	712
Unit-linked and FVO securities	11,694	10,672
Short-term investments	5,300	5,156
Derivative assets	7,477	8,212
Market risk benefits, at estimated fair value	352	372
Separate account assets	143,175	139,504
Liabilities [Abstract]
Derivative liabilities	7,543	7,259
Embedded derivatives within liability host contracts	(90)	9
Market risk benefits, at estimated fair value	2,709	2,581
Separate account liabilities	143,175	139,504
Recurring
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	298,737	281,043
Equity securities	790	712
Unit-linked and FVO securities	11,694	10,672
Short-term investments	5,012	4,834
Other investments	1,261	1,110
Derivative assets	7,477	8,212
Market risk benefits, at estimated fair value	352	372
Reinsured MRB Assets	15	12
Separate account assets	143,175	139,504
Total assets	468,513	446,471
Liabilities [Abstract]
Derivative liabilities	7,543	7,259
Embedded derivatives within liability host contracts	(90)	9
Market risk benefits, at estimated fair value	2,709	2,581
Total liabilities	10,169	9,851
Recurring | Interest rate
Assets [Abstract]
Derivative assets	3,002	3,005
Liabilities [Abstract]
Derivative liabilities	3,612	3,464
Recurring | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	3,961	4,709
Liabilities [Abstract]
Derivative liabilities	3,290	3,452
Recurring | Credit
Assets [Abstract]
Derivative assets	243	215
Liabilities [Abstract]
Derivative liabilities	68	72
Recurring | Equity market contracts
Assets [Abstract]
Derivative assets	271	283
Liabilities [Abstract]
Derivative liabilities	573	271
Recurring | Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	7	2
Recurring | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	82,533	79,374
Recurring | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	59,243	53,759
Recurring | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	42,482	40,250
Recurring | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	41,075	34,421
Recurring | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	32,626	33,428
Recurring | ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	21,224	20,591
Recurring | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,937	9,873
Recurring | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,617	9,347
Recurring | Level 1
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	15,315	16,675
Equity securities	461	415
Unit-linked and FVO securities	7,964	7,306
Short-term investments	3,550	4,127
Other investments	45	37
Derivative assets	14	11
Market risk benefits, at estimated fair value	0	0
Reinsured MRB Assets	0	0
Separate account assets	69,906	63,979
Total assets	97,255	92,550
Liabilities [Abstract]
Derivative liabilities	21	7
Embedded derivatives within liability host contracts	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	21	7
Recurring | Level 1 | Interest rate
Assets [Abstract]
Derivative assets	13	1
Liabilities [Abstract]
Derivative liabilities	1	1
Recurring | Level 1 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	0	1
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 1 | Credit
Assets [Abstract]
Derivative assets	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 1 | Equity market contracts
Assets [Abstract]
Derivative assets	1	9
Liabilities [Abstract]
Derivative liabilities	20	6
Recurring | Level 1 | Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	0	0
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	103	0
Recurring | Level 1 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	15,212	16,675
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	251,029	229,176
Equity securities	77	61
Unit-linked and FVO securities	2,465	2,176
Short-term investments	1,454	702
Other investments	63	63
Derivative assets	7,442	8,184
Market risk benefits, at estimated fair value	0	0
Reinsured MRB Assets	0	0
Separate account assets	72,292	74,535
Total assets	334,822	314,897
Liabilities [Abstract]
Derivative liabilities	7,517	7,240
Embedded derivatives within liability host contracts	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	7,524	7,242
Recurring | Level 2 | Interest rate
Assets [Abstract]
Derivative assets	2,989	3,004
Liabilities [Abstract]
Derivative liabilities	3,611	3,463
Recurring | Level 2 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	3,940	4,694
Liabilities [Abstract]
Derivative liabilities	3,285	3,440
Recurring | Level 2 | Credit
Assets [Abstract]
Derivative assets	243	215
Liabilities [Abstract]
Derivative liabilities	68	72
Recurring | Level 2 | Equity market contracts
Assets [Abstract]
Derivative assets	270	271
Liabilities [Abstract]
Derivative liabilities	553	265
Recurring | Level 2 | Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	7	2
Recurring | Level 2 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	70,170	67,333
Recurring | Level 2 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	42,969	39,295
Recurring | Level 2 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	42,426	40,209
Recurring | Level 2 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	39,024	32,771
Recurring | Level 2 | U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	17,414	16,753
Recurring | Level 2 | ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	19,895	14,755
Recurring | Level 2 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,937	9,866
Recurring | Level 2 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,194	8,194
Recurring | Level 3
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	32,393	35,192
Equity securities	252	236
Unit-linked and FVO securities	1,265	1,190
Short-term investments	8	5
Other investments	1,153	1,010
Derivative assets	21	17
Market risk benefits, at estimated fair value	352	372
Reinsured MRB Assets	15	12
Separate account assets	977	990
Total assets	36,436	39,024
Liabilities [Abstract]
Derivative liabilities	5	12
Embedded derivatives within liability host contracts	(90)	9
Market risk benefits, at estimated fair value	2,709	2,581
Total liabilities	2,624	2,602
Recurring | Level 3 | Interest rate
Assets [Abstract]
Derivative assets	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	21	14
Liabilities [Abstract]
Derivative liabilities	5	12
Recurring | Level 3 | Credit
Assets [Abstract]
Derivative assets	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Equity market contracts
Assets [Abstract]
Derivative assets	0	3
Liabilities [Abstract]
Derivative liabilities	0	0
Recurring | Level 3 | Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	0	0
Recurring | Level 3 | U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	12,363	12,041
Recurring | Level 3 | Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,274	14,464
Recurring | Level 3 | Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	56	41
Recurring | Level 3 | RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	1,948	1,650
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	1,329	5,836
Recurring | Level 3 | Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	0	7
Recurring | Level 3 | CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	423	1,153
Other limited partnership interests | Recurring
Assets [Abstract]
Investments, fair value	$ 47	$ 50