Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 9,555	$ 9,237	$ 8,547	$ 7,337
Items Included in Net Income	51	(1,899)	668	87
Gains (Losses) in OCI and Other	83	190	(49)	89
Issuances, Sales, Maturities, Settlements, Calls, Net	204	(320)	486	(271)
Transfers Into or Out of Level 3, Net	762	59	1,003	25
Ending Fair Value	10,655	7,267	10,655	7,267
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	7,772	6,755	7,761	6,978
Items Included in Net Income	1	1	2	1
Gains (Losses) in OCI and Other	69	193	(52)	(174)
Issuances, Sales, Maturities, Settlements, Calls, Net	206	(20)	364	82
Transfers Into or Out of Level 3, Net	(1)	46	(28)	88
Ending Fair Value	8,047	6,975	8,047	6,975
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5	5	5	5
Issuances, Sales, Maturities, Settlements, Calls, Net	(5)		(5)
Ending Fair Value		5		5
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	66	87	74	90
Gains (Losses) in OCI and Other		(1)	(8)	(4)
Issuances, Sales, Maturities, Settlements, Calls, Net	14		14
Transfers Into or Out of Level 3, Net	(37)		(37)
Ending Fair Value	43	86	43	86
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	1	2	11
Transfers Into or Out of Level 3, Net		1	(1)	(9)
Ending Fair Value	1	2	1	2
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	1	1	1
Issuances, Sales, Maturities, Settlements, Calls, Net	8		8
Ending Fair Value	9	1	9	1
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	688	196	570	268
Items Included in Net Income	1		1
Gains (Losses) in OCI and Other	3	6	(4)	2
Issuances, Sales, Maturities, Settlements, Calls, Net	99	236	282	257
Transfers Into or Out of Level 3, Net	(162)	(14)	(220)	(103)
Ending Fair Value	629	424	629	424
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	84	72	103	78
Gains (Losses) in OCI and Other	10	4	11	(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	6	(4)	(14)	(4)
Transfers Into or Out of Level 3, Net		18		18
Ending Fair Value	100	90	100	90
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	715	651	643	666
Items Included in Net Income	2	28	(1)	(4)
Issuances, Sales, Maturities, Settlements, Calls, Net	(64)	(14)	2	(20)
Transfers Into or Out of Level 3, Net	(23)	8	(14)	31
Ending Fair Value	630	673	630	673
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	59	30	57	30
Items Included in Net Income	19	(1)	26	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	1		(4)
Ending Fair Value	79	29	79	29
Mortgage Loans On Real Estate [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	874		832
Items Included in Net Income	4		6
Gains (Losses) in OCI and Other	1		4
Issuances, Sales, Maturities, Settlements, Calls, Net	(61)		(24)
Ending Fair Value	818		818
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	2,661	2,027	1,542	868
Items Included in Net Income	(2)	(1,402)	1,249	(405)
Gains (Losses) in OCI and Other		(12)		267
Issuances, Sales, Maturities, Settlements, Calls, Net		(18)	(132)	(135)
Transfers Into or Out of Level 3, Net	(2,658)		(2,658)
Ending Fair Value	1	595	1	595
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,831		450	450
Items Included in Net Income	(64)		1,317	(450)
Ending Fair Value	1,767		1,767
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		(4,596)
Items Included in Net Income		1,510		(3,086)
Ending Fair Value		(3,086)		(3,086)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	42	4,589	82	60
Items Included in Net Income	11	(1,508)	(29)	3,021
Ending Fair Value	53	3,081	53	3,081
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(1,869)		(531)	(510)
Items Included in Net Income	53		(1,285)	510
Ending Fair Value	(1,816)		(1,816)
Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	527	799		927
Items Included in Net Income		304		189
Issuances, Sales, Maturities, Settlements, Calls, Net		(439)		(452)
Transfers Into or Out of Level 3, Net	(527)
Ending Fair Value		664		664
Indexed Annuity Ceded Embedded Derivatives [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value				(2,585)
Items Included in Net Income				312
Issuances, Sales, Maturities, Settlements, Calls, Net				1
Ending Fair Value		(2,272)		(2,272)
LPR Ceded Derivative [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	268
Items Included in Net Income	26		(24)
Transfers Into or Out of Level 3, Net			318
Ending Fair Value	294		294
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			550
Items Included in Net Income			32
Issuances, Sales, Maturities, Settlements, Calls, Net			(55)
Transfers Into or Out of Level 3, Net			(527)
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(4,170)	(1,380)	(3,594)
Items Included in Net Income		(831)	(626)
Issuances, Sales, Maturities, Settlements, Calls, Net		(61)	50
Transfers Into or Out of Level 3, Net	$ 4,170		$ 4,170
Ending Fair Value		$ (2,272)		$ (2,272)