Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	$ 304,645	$ 281,043
Equity securities	788	712
Unit-linked and FVO securities	12,270	10,672
Short-term investments	5,962	5,156
Derivative assets	7,347	8,212
Market risk benefits, at estimated fair value	392	372
Separate account assets	146,344	139,504
Liabilities [Abstract]
Derivative liabilities	7,364	7,259
Embedded derivatives within liability host contracts	132	9
Market risk benefits, at estimated fair value	2,585	2,581
Separate account liabilities	146,344	139,504
Recurring
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	304,645	281,043
Equity securities	788	712
Unit-linked and FVO securities	12,270	10,672
Short-term investments	5,653	4,834
Other investments	1,216	1,110
Derivative assets	7,347	8,212
Market risk benefits, at estimated fair value	392	372
Reinsured MRB Assets	12	12
Separate account assets	146,344	139,504
Total assets	478,667	446,471
Liabilities [Abstract]
Derivative liabilities	7,364	7,259
Embedded derivatives within liability host contracts	132	9
Market risk benefits, at estimated fair value	2,585	2,581
Total liabilities	10,086	9,851
Recurring \| Interest rate
Assets [Abstract]
Derivative assets	2,985	3,005
Liabilities [Abstract]
Derivative liabilities	3,704	3,464
Recurring \| Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	3,838	4,709
Liabilities [Abstract]
Derivative liabilities	3,172	3,452
Recurring \| Credit
Assets [Abstract]
Derivative assets	236	215
Liabilities [Abstract]
Derivative liabilities	68	72
Recurring \| Equity market contracts
Assets [Abstract]
Derivative assets	288	283
Liabilities [Abstract]
Derivative liabilities	420	271
Recurring \| Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	5	2
Recurring \| U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	84,218	79,374
Recurring \| Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	59,423	53,759
Recurring \| Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	42,224	40,250
Recurring \| RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	43,725	34,421
Recurring \| U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	32,712	33,428
Recurring \| ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	21,700	20,591
Recurring \| Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	10,889	9,873
Recurring \| CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,754	9,347
Recurring \| Level 1
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,851	16,675
Equity securities	475	415
Unit-linked and FVO securities	8,260	7,306
Short-term investments	4,931	4,127
Other investments	47	37
Derivative assets	16	11
Market risk benefits, at estimated fair value	0	0
Reinsured MRB Assets	0	0
Separate account assets	71,891	63,979
Total assets	100,471	92,550
Liabilities [Abstract]
Derivative liabilities	17	7
Embedded derivatives within liability host contracts	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	17	7
Recurring \| Level 1 \| Interest rate
Assets [Abstract]
Derivative assets	0	1
Liabilities [Abstract]
Derivative liabilities	5	1
Recurring \| Level 1 \| Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	4	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	12	9
Liabilities [Abstract]
Derivative liabilities	12	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	0	0
Recurring \| Level 1 \| U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	14,851	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	256,187	229,176
Equity securities	81	61
Unit-linked and FVO securities	2,663	2,176
Short-term investments	689	702
Other investments	0	63
Derivative assets	7,313	8,184
Market risk benefits, at estimated fair value	0	0
Reinsured MRB Assets	0	0
Separate account assets	73,546	74,535
Total assets	340,479	314,897
Liabilities [Abstract]
Derivative liabilities	7,341	7,240
Embedded derivatives within liability host contracts	0	0
Market risk benefits, at estimated fair value	0	0
Total liabilities	7,346	7,242
Recurring \| Level 2 \| Interest rate
Assets [Abstract]
Derivative assets	2,985	3,004
Liabilities [Abstract]
Derivative liabilities	3,699	3,463
Recurring \| Level 2 \| Foreign currency exchange rate contracts
Assets [Abstract]
Derivative assets	3,816	4,694
Liabilities [Abstract]
Derivative liabilities	3,166	3,440
Recurring \| Level 2 \| Credit
Assets [Abstract]
Derivative assets	236	215
Liabilities [Abstract]
Derivative liabilities	68	72
Recurring \| Level 2 \| Equity market contracts
Assets [Abstract]
Derivative assets	276	271
Liabilities [Abstract]
Derivative liabilities	408	265
Recurring \| Level 2 \| Separate account liabilities
Liabilities [Abstract]
Separate account liabilities	5	2
Recurring \| Level 2 \| U.S. corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	71,026	67,333
Recurring \| Level 2 \| Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	43,199	39,295
Recurring \| Level 2 \| Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	42,171	40,209
Recurring \| Level 2 \| RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	41,525	32,771
Recurring \| Level 2 \| U.S. government and agency
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	17,861	16,753
Recurring \| Level 2 \| ABS & CLO
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	20,201	14,755
Recurring \| Level 2 \| Municipals
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	10,889	9,866
Recurring \| Level 2 \| CMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	9,315	8,194
Recurring \| Level 3
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	33,607	35,192
Equity securities	232	236
Unit-linked and FVO securities	1,347	1,190
Short-term investments	33	5
Other investments	1,169	1,010
Derivative assets	18	17
Market risk benefits, at estimated fair value	392	372
Reinsured MRB Assets	12	12
Separate account assets	907	990
Total assets	37,717	39,024
Liabilities [Abstract]
Derivative liabilities	6	12
Embedded derivatives within liability host contracts	132	9
Market risk benefits, at estimated fair value	2,585	2,581
Total liabilities	2,723	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	18	14
Liabilities [Abstract]
Derivative liabilities	6	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	13,192	12,041
Recurring \| Level 3 \| Foreign corporate
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	16,224	14,464
Recurring \| Level 3 \| Foreign government
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	53	41
Recurring \| Level 3 \| RMBS
Assets [Abstract]
Estimated Fair Value of Fixed Maturity Securities AFS	2,200	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	1,499	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	439	1,153
Other limited partnership interests \| Recurring
Assets [Abstract]
Investments, fair value	$ 41	$ 50

Investments for which the FVO has been elected, or are otherwise required to be carried at estimated fair value.

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