Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Residential mortgage loans - FVO
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	$ 127	$ 165
Total realized/unrealized gains (losses) included in net income (loss)	(8)	(5)	$ 9
Total realized/unrealized gains (losses) included in AOCI	0	0	0
Purchases	0	0
Sales	(108)	(11)
Issuances	0	0
Settlements	(11)	(22)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at December 31,	0	127	165
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(10)	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	(10)	3
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	325	(361)	67
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(459)	(128)	579
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	(152)	594
Total realized/unrealized gains (losses) included in net income (loss)	238	(460)	279
Total realized/unrealized gains (losses) included in AOCI	(537)	(334)	761
Purchases	82	30
Sales	0	0
Issuances	(3)	(13)
Settlements	201	32
Transfers into Level 3	0	1
Transfers out of Level 3	1	(2)
Balance at December 31,	(170)	(152)	594
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	325	(361)	67
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(459)	(128)	579
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	171	746	(124)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	22	27	(33)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance at January 1,	(611)	(1,141)
Total realized/unrealized gains (losses) included in net income (loss)	172	747	(110)
Total realized/unrealized gains (losses) included in AOCI	22	27	(34)
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	(132)	(244)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at December 31,	(549)	(611)	(1,141)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	171	746	(124)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	22	27	(33)
Corporate fixed maturity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	25,435	24,101
Total realized/unrealized gains (losses) included in net income (loss)	(7)	(34)	(88)
Total realized/unrealized gains (losses) included in AOCI	(6,221)	(1,334)	1,774
Purchases	5,273	4,988
Sales	(1,762)	(1,543)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	2,127	179
Transfers out of Level 3	(444)	(922)
Balance at December 31,	24,401	25,435	24,101
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(3)	(5)	(48)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(6,136)	(1,293)	1,754
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	(3)	(5)	(48)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(6,136)	(1,293)	1,754
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	91	117
Total realized/unrealized gains (losses) included in net income (loss)	(38)	0	(2)
Total realized/unrealized gains (losses) included in AOCI	(13)	(2)	(1)
Purchases	36	1
Sales	(9)	(8)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	46	12
Transfers out of Level 3	(10)	(29)
Balance at December 31,	103	91	117
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(38)	0	(1)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(13)	(2)	(1)
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	(38)	0	(1)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(13)	(2)	(1)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	5,871	5,289
Total realized/unrealized gains (losses) included in net income (loss)	29	46	49
Total realized/unrealized gains (losses) included in AOCI	(478)	(26)	41
Purchases	967	1,824
Sales	(984)	(1,326)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	251	358
Transfers out of Level 3	(1,387)	(294)
Balance at December 31,	4,269	5,871	5,289
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	27	42	54
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(450)	(24)	47
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	27	42	54
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	(450)	(24)	47
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	151	150
Total realized/unrealized gains (losses) included in net income (loss)	16	27	12
Total realized/unrealized gains (losses) included in AOCI	0	0	0
Purchases	108	12
Sales	(14)	(35)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(2)	(3)
Balance at December 31,	259	151	150
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	11	13	2
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	13	2
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0
Unit-linked and FVO Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	901	701
Total realized/unrealized gains (losses) included in net income (loss)	(133)	101	67
Total realized/unrealized gains (losses) included in AOCI	0	0	0
Purchases	28	42
Sales	(24)	(18)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	23	86
Transfers out of Level 3	(8)	(11)
Balance at December 31,	787	901	701
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(131)	101	69
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	(131)	101	69
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0
Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	3	43
Total realized/unrealized gains (losses) included in net income (loss)	0	1	(7)
Total realized/unrealized gains (losses) included in AOCI	0	(3)	4
Purchases	56	2
Sales	(2)	(37)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	(3)
Balance at December 31,	57	3	43
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	(7)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	4
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	(7)
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	4
Other Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	898	573
Total realized/unrealized gains (losses) included in net income (loss)	57	94	19
Total realized/unrealized gains (losses) included in AOCI	0	0	0
Purchases	246	348
Sales	(177)	(92)
Issuances	0	0
Settlements	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	(98)	(25)
Balance at December 31,	926	898	573
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	56	89	24
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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	56	89	24
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	0	0	0
Separate Accounts (9)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,	2,131	1,079
Total realized/unrealized gains (losses) included in net income (loss)	61	29	(5)
Total realized/unrealized gains (losses) included in AOCI	0	0	0
Purchases	202	1,056
Sales	(1,164)	(44)
Issuances	(2)	(2)
Settlements	4	6
Transfers into Level 3	1	10
Transfers out of Level 3	(23)	(3)
Balance at December 31,	1,210	2,131	1,079
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	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
Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period	$ 0	$ 0	$ 0