Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Residential mortgage loans - FVO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 127	$ 165
Total realized/unrealized gains (losses) included in net income (loss)	(3)	(2)
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	0	0
Sales	0	(9)
Issuances	0	0
Settlements	(5)	(5)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	119	149
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(4)	(5)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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)	(5)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	290	(162)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(203)	(538)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(152)	594
Total realized/unrealized gains (losses) included in net income (loss)	310	(251)
Total realized/unrealized gains (losses) included in AOCI	(220)	(604)
Purchases	90	0
Sales	0	0
Issuances	(2)	0
Settlements	5	96
Transfers into Level 3	0	1
Transfers out of Level 3	0	2
Balance, end of period	31	(162)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	290	(162)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(203)	(538)
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	42	671
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	9	21
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(611)	(1,141)
Total realized/unrealized gains (losses) included in net income (loss)	42	673
Total realized/unrealized gains (losses) included in AOCI	9	21
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	(18)	(61)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	(578)	(508)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	42	671
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	9	21
Corporate fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	25,435	24,101
Total realized/unrealized gains (losses) included in net income (loss)	(11)	(1)
Total realized/unrealized gains (losses) included in AOCI	(2,026)	(1,182)
Purchases	1,266	1,012
Sales	(512)	(274)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	564	235
Transfers out of Level 3	(354)	(472)
Balance, end of period	24,362	23,419
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(11)	(4)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(2,033)	(1,175)
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)	(4)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(2,033)	(1,175)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	91	117
Total realized/unrealized gains (losses) included in net income (loss)	0	0
Total realized/unrealized gains (losses) included in AOCI	1	0
Purchases	19	23
Sales	0	(3)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	137	7
Transfers out of Level 3	0	(12)
Balance, end of period	248	132
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	1	0
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	5,871	5,289
Total realized/unrealized gains (losses) included in net income (loss)	12	9
Total realized/unrealized gains (losses) included in AOCI	(207)	(46)
Purchases	806	613
Sales	(237)	(356)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	110	13
Transfers out of Level 3	(425)	(15)
Balance, end of period	5,930	5,507
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	12	7
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(206)	(43)
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	7
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(206)	(43)
Municipals
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0	0
Total realized/unrealized gains (losses) included in net income (loss)	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	29	5
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	29	5
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	151	150
Total realized/unrealized gains (losses) included in net income (loss)	13	4
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	27	4
Sales	0	(4)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(2)	0
Balance, end of period	189	154
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	13	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	13	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0
Unit-linked and FVO Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	901	701
Total realized/unrealized gains (losses) included in net income (loss)	(36)	18
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	8	10
Sales	(3)	(12)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	12	101
Transfers out of Level 3	(14)	(6)
Balance, end of period	868	812
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(36)	19
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	(36)	19
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0
Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	3	43
Total realized/unrealized gains (losses) included in net income (loss)	0	0
Total realized/unrealized gains (losses) included in AOCI	0	(2)
Purchases	4	61
Sales	(2)	(1)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	4
Transfers out of Level 3	0	(3)
Balance, end of period	5	102
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(2)
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
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	(2)
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	898	573
Total realized/unrealized gains (losses) included in net income (loss)	46	13
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	126	70
Sales	(23)	0
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	1,047	656
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	46	14
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	46	14
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0
Separate Accounts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	2,131	1,079
Total realized/unrealized gains (losses) included in net income (loss)	18	(10)
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases	289	79
Sales	(316)	(13)
Issuances	1	(1)
Settlements	(2)	2
Transfers into Level 3	1	0
Transfers out of Level 3	(4)	(3)
Balance, end of period	2,118	1,133
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	$ 0	$ 0