Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	$ 15	$ (57)	$ 2	$ (28)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(92)	0	(85)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(75)	(214)	(143)	(170)
Total realized/unrealized gains (losses) included in net income (loss)	21	(56)	5	(21)
Total realized/unrealized gains (losses) included in AOCI	7	(110)	(28)	(59)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	72	91	201	121
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(1)	0	(11)	(160)
Balance, end of period	24	(289)	24	(289)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	15	(57)	2	(28)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(92)	0	(85)
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	(61)	86	(21)	51
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	(55)	(64)	(93)	(17)
Total realized/unrealized gains (losses) included in net income (loss)	(61)	86	(21)	51
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	(3)	(27)	(5)	(39)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(119)	(5)	(119)	(5)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(61)	86	(21)	51
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	29,240	25,968	28,345	24,401
Total realized/unrealized gains (losses) included in net income (loss)	(10)	3	(70)	0
Total realized/unrealized gains (losses) included in AOCI	1,169	(996)	502	(659)
Purchases	2,080	991	4,618	3,282
Sales	(1,255)	(573)	(2,212)	(1,562)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	94	132	55	305
Transfers out of Level 3	(1,111)	(258)	(1,031)	(500)
Balance, end of period	30,207	25,267	30,207	25,267
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(6)	2	(17)	(2)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	1,159	(989)	489	(685)
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	(6)	2	(17)	(2)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	1,159	(989)	489	(685)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	40	60	51	103
Total realized/unrealized gains (losses) included in net income (loss)	(8)	4	(6)	3
Total realized/unrealized gains (losses) included in AOCI	7	(9)	3	(7)
Purchases	2	4	1	7
Sales	(1)	(9)	(1)	(11)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	1	0	1	4
Transfers out of Level 3	0	(7)	(8)	(56)
Balance, end of period	41	43	41	43
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(8)	4	(6)	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	7	(9)	3	(7)
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	(8)	4	(6)	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	7	(9)	3	(7)
Structured Products
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	5,867	4,554	4,551	4,269
Total realized/unrealized gains (losses) included in net income (loss)	6	(8)	19	(10)
Total realized/unrealized gains (losses) included in AOCI	132	(10)	172	(42)
Purchases	1,080	969	1,614	1,099
Sales	(539)	(376)	(792)	(537)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	31	70	179	240
Transfers out of Level 3	(1,069)	(294)	(235)	(114)
Balance, end of period	5,508	4,905	5,508	4,905
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	12	(5)	23	1
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	113	(14)	144	(48)
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	12	(5)	23	1
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	113	(14)	144	(48)
Municipals
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1	7	0	0
Total realized/unrealized gains (losses) included in net income (loss)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	0	0	0	0
Sales	(1)	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(7)	0	0
Balance, end of period	0	0	0	0
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	262	250	249	259
Total realized/unrealized gains (losses) included in net income (loss)	(15)	(5)	(26)	1
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	9	0	31	2
Sales	(14)	(1)	(12)	(18)
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	242	244	242	244
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(15)	(4)	(20)	(6)
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	(15)	(4)	(20)	(6)
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	1,096	1,057	1,103	787
Total realized/unrealized gains (losses) included in net income (loss)	56	(31)	121	63
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	135	204	139	227
Sales	(111)	(177)	(167)	(21)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	16	0	17
Transfers out of Level 3	0	0	(20)	(4)
Balance, end of period	1,176	1,069	1,176	1,069
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	57	(32)	124	62
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	57	(32)	124	62
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	10	18	27	57
Total realized/unrealized gains (losses) included in net income (loss)	0	0	1	0
Total realized/unrealized gains (losses) included in AOCI	0	1	(1)	1
Purchases	1	14	5	25
Sales	(8)	(8)	(26)	(48)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	3	0	0	0
Transfers out of Level 3	0	0	0	(10)
Balance, end of period	6	25	6	25
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	1	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	1	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0	0
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,073	964	975	926
Total realized/unrealized gains (losses) included in net income (loss)	9	(6)	21	19
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	6	12	54	25
Sales	(45)	0	(186)	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	52	0	231	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	1,095	970	1,095	970
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	11	(6)	19	20
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	11	(6)	19	20
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	1,122	1,248	1,147	1,210
Total realized/unrealized gains (losses) included in net income (loss)	(9)	(22)	(46)	(62)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	18	15	15	181
Sales	(93)	(30)	(92)	(128)
Issuances	0	0	0	0
Settlements	0	0	0	1
Transfers into Level 3	1	6	2	14
Transfers out of Level 3	(20)	(10)	(7)	(9)
Balance, end of period	1,019	1,207	1,019	1,207
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