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Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 6,441	$ 5,141
Items Included in Net Income	1,854	(2,376)
Gains (Losses) in OCI and Other	(131)	(119)
Issuances, Sales, Maturities, Settlements, Calls, Net	295	113
Transfers Into or Out of Level 3, Net	(78)	(35)
Ending Fair Value	8,381	2,724
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5,121	4,281
Items Included in Net Income	2
Gains (Losses) in OCI and Other	(120)	(385)
Issuances, Sales, Maturities, Settlements, Calls, Net	170	165
Transfers Into or Out of Level 3, Net	(28)	42
Ending Fair Value	5,145	4,103
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5	5
Items Included in Net Income
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
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	74	90
Items Included in Net Income
Gains (Losses) in OCI and Other	(8)	(3)
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	66	87
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	2	11
Items Included in Net Income
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net		(10)
Ending Fair Value	2	1
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		1
Items Included in Net Income	1
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	1	1
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	570	268
Items Included in Net Income
Gains (Losses) in OCI and Other	(7)	(4)
Issuances, Sales, Maturities, Settlements, Calls, Net	183	22
Transfers Into or Out of Level 3, Net	(58)	(90)
Ending Fair Value	688	196
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	104	78
Items Included in Net Income
Gains (Losses) in OCI and Other	1	(6)
Issuances, Sales, Maturities, Settlements, Calls, Net	(20)
Transfers Into or Out of Level 3, Net
Ending Fair Value	85	72
Mortgage Loans On Real Estate [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	832
Items Included in Net Income	2
Gains (Losses) in OCI and Other	3
Issuances, Sales, Maturities, Settlements, Calls, Net	37
Transfers Into or Out of Level 3, Net
Ending Fair Value	874
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	644	666
Items Included in Net Income	(3)	(32)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	66	(6)
Transfers Into or Out of Level 3, Net	8	23
Ending Fair Value	715	651
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	59	30
Items Included in Net Income	6
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	(4)
Transfers Into or Out of Level 3, Net
Ending Fair Value	61	30
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,542	868
Items Included in Net Income	1,251	997
Gains (Losses) in OCI and Other		279
Issuances, Sales, Maturities, Settlements, Calls, Net	(132)	(117)
Transfers Into or Out of Level 3, Net
Ending Fair Value	2,661	2,027
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	450	450
Items Included in Net Income	1,381	(450)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	1,831
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	(152)	(4,596)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	(152)	(4,596)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	82	60
Items Included in Net Income	(40)	668
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net
Transfers Into or Out of Level 3, Net
Ending Fair Value	42	728
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	550	927
Items Included in Net Income	32	(115)
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	(55)	(13)
Transfers Into or Out of Level 3, Net
Ending Fair Value	527	799
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(3,594)	(2,585)
Items Included in Net Income	(626)	1,143
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net	50	62
Transfers Into or Out of Level 3, Net
Ending Fair Value	$ (4,170)	$ (1,380)

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