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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	$ 8,381	$ 2,724	$ 6,441	$ 5,141
Items Included in Net Income	(27)	(549)	1,827	(2,925)
Gains (Losses) in OCI and Other	84	201	(47)	82
Issuances, Sales, Maturities, Settlements, Calls, Net	213	(314)	508	(201)
Transfers Into or Out of Level 3, Net	762	64	684	29
Ending Fair Value	9,413	2,126	9,413	2,126
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5,145	4,103	5,121	4,281
Items Included in Net Income	1		3
Gains (Losses) in OCI and Other	69	205	(51)	(180)
Issuances, Sales, Maturities, Settlements, Calls, Net	215	(14)	385	151
Transfers Into or Out of Level 3, Net	(1)	50	(29)	92
Ending Fair Value	5,429	4,344	5,429	4,344
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5	5	5	5
Items Included in Net Income
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	(5)		(5)
Transfers Into or Out of Level 3, Net
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
Items Included in Net Income
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	2	1	2	11
Items Included in Net Income	(1)		(1)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net		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
Items Included in Net Income			1
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	8		8
Transfers Into or Out of Level 3, Net
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	4	5	(3)	1
Issuances, Sales, Maturities, Settlements, Calls, Net	99	236	282	258
Transfers Into or Out of Level 3, Net	(162)	(13)	(220)	(103)
Ending Fair Value	630	424	630	424
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	85	72	104	78
Items Included in Net Income
Gains (Losses) in OCI and Other	11	4	12	(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	6	(4)	(14)	(4)
Transfers Into or Out of Level 3, Net		18		18
Ending Fair Value	102	90	102	90
Mortgage Loans On Real Estate [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	874		832
Items Included in Net Income	5		7
Gains (Losses) in OCI and Other			3
Issuances, Sales, Maturities, Settlements, Calls, Net	(61)		(24)
Transfers Into or Out of Level 3, Net
Ending Fair Value	818		818
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	715	651	644	666
Items Included in Net Income	2	28	(1)	(4)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	(64)	(14)	2	(20)
Transfers Into or Out of Level 3, Net	(23)	8	(15)	31
Ending Fair Value	630	673	630	673
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	61	30	59	30
Items Included in Net Income	20	(1)	26	(1)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	1		(3)
Transfers Into or Out of Level 3, Net
Ending Fair Value	82	29	82	29
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)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	1,767		1,767
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(152)	(4,596)
Items Included in Net Income		1,510	(152)	(3,086)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	(152)	(3,086)	(152)	(3,086)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	42	728	82	60
Items Included in Net Income	11	(157)	(29)	511
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	53	571	53	571
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value				(9)
Items Included in Net Income				9
Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	527	799	550	927
Items Included in Net Income		304	32	189
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net		(439)	(55)	(452)
Transfers Into or Out of Level 3, Net	(527)		(527)
Ending Fair Value		664		664
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(4,170)	(1,380)	(3,594)	(2,585)
Items Included in Net Income		(831)	(626)	312
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net		(61)	50	1
Transfers Into or Out of Level 3, Net	4,170		4,170
Ending Fair Value		$ (2,272)		$ (2,272)

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