Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Residential mortgage loans - FVO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 0	$ 109	$ 0	$ 127
Total realized/unrealized gains (losses) included in net income (loss)	0	1	0	(8)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	0	0	0	0
Sales	0	(108)	0	(108)
Issuances	0	0	0	0
Settlements	0	(2)	0	(11)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	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
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	(57)	(42)	(28)	(133)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(92)	(145)	(85)	(474)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(214)	(287)	(170)	(152)
Total realized/unrealized gains (losses) included in net income (loss)	(56)	(201)	(21)	(139)
Total realized/unrealized gains (losses) included in AOCI	(110)	(118)	(59)	(528)
Purchases	0	54	0	82
Sales	0	0	0	0
Issuances	0	(1)	0	(3)
Settlements	91	26	121	68
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(144)	(160)	1
Balance, end of period	(289)	(671)	(289)	(671)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(57)	(42)	(28)	(133)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(92)	(145)	(85)	(474)
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	86	(8)	51	49
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	(64)	(117)	(17)	(222)
Total realized/unrealized gains (losses) included in net income (loss)	86	(8)	51	49
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	(27)	34	(39)	82
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(5)	(91)	(5)	(91)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	86	(8)	51	49
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	25,968	22,582	24,401	25,435
Total realized/unrealized gains (losses) included in net income (loss)	3	2	0	(17)
Total realized/unrealized gains (losses) included in AOCI	(996)	(2,218)	(659)	(7,082)
Purchases	991	1,085	3,282	3,515
Sales	(573)	(486)	(1,562)	(1,241)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	132	209	305	352
Transfers out of Level 3	(258)	(673)	(500)	(461)
Balance, end of period	25,267	20,501	25,267	20,501
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	2	2	(2)	(19)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(989)	(2,217)	(685)	(7,056)
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	2	2	(2)	(19)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(989)	(2,217)	(685)	(7,056)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	60	103	103	91
Total realized/unrealized gains (losses) included in net income (loss)	4	5	3	(38)
Total realized/unrealized gains (losses) included in AOCI	(9)	(1)	(7)	6
Purchases	4	0	7	1
Sales	(9)	(2)	(11)	(3)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	4	48
Transfers out of Level 3	(7)	(44)	(56)	(44)
Balance, end of period	43	61	43	61
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	4	5	3	(38)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(9)	(1)	(7)	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	4	5	3	(38)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(9)	(1)	(7)	5
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	4,554	5,347	4,269	5,871
Total realized/unrealized gains (losses) included in net income (loss)	(8)	5	(10)	30
Total realized/unrealized gains (losses) included in AOCI	(10)	(152)	(42)	(575)
Purchases	969	237	1,099	781
Sales	(376)	(199)	(537)	(850)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	70	39	240	228
Transfers out of Level 3	(294)	(232)	(114)	(440)
Balance, end of period	4,905	5,045	4,905	5,045
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(5)	1	1	23
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(14)	(146)	(48)	(554)
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	(5)	1	1	23
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(14)	(146)	(48)	(554)
Municipals
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	7	0	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	0	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	(7)	0	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	250	179	259	151
Total realized/unrealized gains (losses) included in net income (loss)	(5)	(7)	1	5
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	0	4	2	28
Sales	(1)	(7)	(18)	(13)
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	(2)
Balance, end of period	244	169	244	169
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(4)	(7)	(6)	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	(4)	(7)	(6)	0
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	1,057	742	787	901
Total realized/unrealized gains (losses) included in net income (loss)	(31)	(27)	63	(195)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	204	14	227	29
Sales	(177)	(6)	(21)	(10)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	16	0	17	13
Transfers out of Level 3	0	0	(4)	(15)
Balance, end of period	1,069	723	1,069	723
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(32)	(27)	62	(194)
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)	(27)	62	(194)
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	18	119	57	3
Total realized/unrealized gains (losses) included in net income (loss)	0	0	0	(1)
Total realized/unrealized gains (losses) included in AOCI	1	0	1	0
Purchases	14	5	25	5
Sales	(8)	(19)	(48)	(2)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(100)	(10)	0
Balance, end of period	25	5	25	5
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	(1)
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	(1)
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	964	1,013	926	898
Total realized/unrealized gains (losses) included in net income (loss)	(6)	8	19	80
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	12	33	25	221
Sales	0	(132)	0	(178)
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	(99)
Balance, end of period	970	922	970	922
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(6)	9	20	77
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	(6)	9	20	77
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	1,248	1,230	1,210	2,131
Total realized/unrealized gains (losses) included in net income (loss)	(22)	9	(62)	52
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	15	62	181	150
Sales	(30)	(74)	(128)	(1,107)
Issuances	0	(1)	0	3
Settlements	0	0	1	4
Transfers into Level 3	6	0	14	0
Transfers out of Level 3	(10)	(11)	(9)	(18)
Balance, end of period	1,207	1,215	1,207	1,215
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