Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	$ (4)	$ 17	$ 10	$ (14)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(9)	0	(21)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	21	(139)	5	(143)
Total realized/unrealized gains (losses) included in net income (loss)	(4)	17	11	(16)
Total realized/unrealized gains (losses) included in AOCI	0	(15)	1	(40)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	135
Settlements	0	67	(1)	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(1)	(5)	0	(11)
Balance, end of period	16	(75)	16	(75)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(4)	17	10	(14)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(9)	0	(21)
Net Embedded Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(24)	8	(56)	40
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(43)	(62)	(9)	(93)
Total realized/unrealized gains (losses) included in net income (loss)	(24)	8	(56)	40
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	157	(1)	155	(2)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	90	(55)	90	(55)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(24)	8	(56)	40
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Corporate fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	27,512	28,503	26,505	28,345
Total realized/unrealized gains (losses) included in net income (loss)	(10)	(46)	(28)	(52)
Total realized/unrealized gains (losses) included in AOCI	872	(294)	1,313	(678)
Purchases	1,154	1,940	2,093	3,078
Sales	(479)	(794)	(950)	(1,406)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	156	72	95	109
Transfers out of Level 3	(568)	(141)	(391)	(156)
Balance, end of period	28,637	29,240	28,637	29,240
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(17)	(9)	(19)	(3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	873	(314)	1,289	(686)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(17)	(9)	(19)	(3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	873	(314)	1,289	(686)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	57	45	41	51
Total realized/unrealized gains (losses) included in net income (loss)	0	0	0	2
Total realized/unrealized gains (losses) included in AOCI	1	(4)	5	(5)
Purchases	7	0	12	0
Sales	0	(1)	(1)	(3)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(9)	0	(1)	(5)
Balance, end of period	56	40	56	40
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	2
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	1	(4)	5	(5)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	2
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	1	(4)	5	(5)
Structured Products
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	4,807	5,277	8,639	4,551
Total realized/unrealized gains (losses) included in net income (loss)	7	12	(12)	15
Total realized/unrealized gains (losses) included in AOCI	11	(5)	(78)	40
Purchases	511	1,343	1,217	1,582
Sales	(182)	(168)	(359)	(340)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	215	86	169	165
Transfers out of Level 3	(1,669)	(678)	(5,876)	(146)
Balance, end of period	3,700	5,867	3,700	5,867
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	9	11	10	15
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	10	(7)	45	35
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	9	11	10	15
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	10	(7)	45	35
Municipals
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	2	0	7	0
Total realized/unrealized gains (losses) included in net income (loss)	0	0	1	0
Total realized/unrealized gains (losses) included in AOCI	0	0	(1)	0
Purchases	0	2	0	2
Sales	(2)	(1)	(7)	(1)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	1	0	1
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	248	253	236	249
Total realized/unrealized gains (losses) included in net income (loss)	16	(11)	9	(8)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	20	27	30	31
Sales	(32)	(7)	(23)	(10)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	252	262	252	262
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	16	(10)	15	(3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	16	(10)	15	(3)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Unit-linked and FVO Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,175	1,093	1,190	1,103
Total realized/unrealized gains (losses) included in net income (loss)	94	36	76	67
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	95	112	102	114
Sales	(99)	(139)	(103)	(165)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(6)	0	(23)
Balance, end of period	1,265	1,096	1,265	1,096
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	94	36	81	67
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	94	36	81	67
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	9	14	5	27
Total realized/unrealized gains (losses) included in net income (loss)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0	1	(1)
Purchases	5	6	6	10
Sales	0	(10)	(3)	(26)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(6)	0	(1)	0
Balance, end of period	8	10	8	10
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	1	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	1	0
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,121	1,171	1,010	975
Total realized/unrealized gains (losses) included in net income (loss)	(18)	0	(16)	12
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	61	42	208	47
Sales	(31)	(140)	(69)	(140)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	20	0	20	179
Transfers out of Level 3	0	0	0	0
Balance, end of period	1,153	1,073	1,153	1,073
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(32)	(5)	(32)	8
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(32)	(5)	(32)	8
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Separate Accounts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	972	1,142	990	1,147
Total realized/unrealized gains (losses) included in net income (loss)	(19)	(8)	(14)	(37)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	97	44	103	83
Sales	(69)	(56)	(92)	(67)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	1	0	1	3
Transfers out of Level 3	(5)	0	(11)	(7)
Balance, end of period	977	1,122	977	1,122
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	$ 0	$ 0	$ 0	$ 0