Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Residential mortgage loans - FVO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 0	$ 119	$ 0	$ 127
Total realized/unrealized gains (losses) included in net income (loss)	0	(5)	0	(9)
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	(5)	0	(9)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	109	0	109
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(5)	0	(9)
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	(5)	0	(9)
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	13	(291)	31	(15)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(48)	(199)	7	(390)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	53	31	(170)	(152)
Total realized/unrealized gains (losses) included in net income (loss)	32	(292)	38	17
Total realized/unrealized gains (losses) included in AOCI	(41)	(191)	46	(410)
Purchases	0	152	0	240
Sales	0	0	0	0
Issuances	0	0	(1)	(2)
Settlements	(3)	13	33	20
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(255)	0	(160)	0
Balance, end of period	(214)	(287)	(214)	(287)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	13	(291)	31	(15)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(48)	(199)	7	(390)
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	(17)	160	(35)	57
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	(44)	(296)	(17)	(222)
Total realized/unrealized gains (losses) included in net income (loss)	(18)	160	(35)	57
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	(2)	19	(12)	48
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(64)	(117)	(64)	(117)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(17)	160	(35)	57
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	25,676	24,362	24,401	25,435
Total realized/unrealized gains (losses) included in net income (loss)	(8)	(5)	(17)	(16)
Total realized/unrealized gains (losses) included in AOCI	(369)	(2,857)	343	(4,892)
Purchases	1,122	1,643	2,408	2,698
Sales	(527)	(315)	(1,064)	(782)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	210	154	391	463
Transfers out of Level 3	(136)	(400)	(494)	(324)
Balance, end of period	25,968	22,582	25,968	22,582
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(8)	(5)	(20)	(16)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(379)	(2,851)	321	(4,885)
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)	(5)	(20)	(16)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(379)	(2,851)	321	(4,885)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	46	248	103	91
Total realized/unrealized gains (losses) included in net income (loss)	(1)	4	(1)	(43)
Total realized/unrealized gains (losses) included in AOCI	3	3	2	7
Purchases	5	1	13	1
Sales	(4)	(2)	(12)	(2)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	11	3	10	49
Transfers out of Level 3	0	(154)	(55)	0
Balance, end of period	60	103	60	103
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(1)	4	(1)	(43)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	3	3	2	6
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	(1)	4	(1)	(43)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	3	3	2	6
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	4,553	5,930	4,269	5,871
Total realized/unrealized gains (losses) included in net income (loss)	2	12	(7)	23
Total realized/unrealized gains (losses) included in AOCI	(43)	(207)	(24)	(423)
Purchases	272	536	413	732
Sales	(112)	(468)	(239)	(668)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	71	129	212	190
Transfers out of Level 3	(189)	(585)	(70)	(378)
Balance, end of period	4,554	5,347	4,554	5,347
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	4	12	3	23
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(45)	(205)	(26)	(416)
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	12	3	23
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(45)	(205)	(26)	(416)
Municipals
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0	29	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	7	0	7	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	0	(29)	0	0
Balance, end of period	7	0	7	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	258	189	259	151
Total realized/unrealized gains (losses) included in net income (loss)	(1)	(2)	6	11
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	0	2	2	25
Sales	(7)	(10)	(17)	(6)
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	250	179	250	179
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	1	(3)	(3)	9
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	1	(3)	(3)	9
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	1,011	868	787	901
Total realized/unrealized gains (losses) included in net income (loss)	50	(132)	95	(169)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	190	8	205	15
Sales	(193)	(2)	(26)	(4)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	1	13
Transfers out of Level 3	(1)	0	(5)	(14)
Balance, end of period	1,057	742	1,057	742
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	50	(132)	94	(168)
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	50	(132)	94	(168)
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	58	5	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	0	0
Purchases	5	15	17	119
Sales	(44)	(1)	(47)	(2)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	100	0	0
Transfers out of Level 3	0	0	(9)	0
Balance, end of period	18	119	18	119
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	(1)	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	(1)	0	(1)	0
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	928	1,047	926	898
Total realized/unrealized gains (losses) included in net income (loss)	23	26	25	72
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	13	61	13	187
Sales	0	(21)	0	(44)
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)	0	(100)
Balance, end of period	964	1,013	964	1,013
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	23	23	26	69
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	23	23	26	69
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	1,202	2,118	1,210	2,131
Total realized/unrealized gains (losses) included in net income (loss)	(17)	24	(39)	43
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases	72	36	170	107
Sales	(21)	(949)	(110)	(1,047)
Issuances	0	(5)	0	(5)
Settlements	0	6	1	4
Transfers into Level 3	12	0	16	1
Transfers out of Level 3	0	0	0	(4)
Balance, end of period	1,248	1,230	1,248	1,230
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