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Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 5,141	$ 4,014	$ 3,139
Items Included in Net Income	552	(417)	(437)
Gains (Losses) in OCI and Other	549	353	(271)
Issuances, Sales, Maturities, Settlements, Calls, Net	(284)	2,013	2,045
Transfers Into or Out of Level 3, Net	483	(822)	(462)
Ending Fair Value	6,441	5,141	4,014
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	4,281	3,269	3,091
Items Included in Net Income	(8)	3	10
Gains (Losses) in OCI and Other	284	180	(199)
Issuances, Sales, Maturities, Settlements, Calls, Net	464	878	429
Transfers Into or Out of Level 3, Net	100	(49)	(62)
Ending Fair Value	5,121	4,281	3,269
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net			67
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5		5
Issuances, Sales, Maturities, Settlements, Calls, Net			(5)
Transfers Into or Out of Level 3, Net		5
Ending Fair Value	5	5
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	90	109	110
Items Included in Net Income	1
Gains (Losses) in OCI and Other	3	6	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	(20)	(25)
Transfers Into or Out of Level 3, Net
Ending Fair Value	74	90	109
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	11	7	12
Items Included in Net Income
Gains (Losses) in OCI and Other
Issuances, Sales, Maturities, Settlements, Calls, Net		21	7
Transfers Into or Out of Level 3, Net	(9)	(17)	(12)
Ending Fair Value	2	11	7
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	2	6
Items Included in Net Income	(1)	1
Issuances, Sales, Maturities, Settlements, Calls, Net		5	35
Transfers Into or Out of Level 3, Net		(7)	(39)
Ending Fair Value		1	2
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	268	134
Gains (Losses) in OCI and Other	7	1
Issuances, Sales, Maturities, Settlements, Calls, Net	496	619
Transfers Into or Out of Level 3, Net	(201)	(486)
Ending Fair Value	570	268	134
ABS [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net			17
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		134	118
Gains (Losses) in OCI and Other			(1)
Issuances, Sales, Maturities, Settlements, Calls, Net			223
Transfers Into or Out of Level 3, Net			(206)
Ending Fair Value			134
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	78	75	76
Gains (Losses) in OCI and Other	(2)	3	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	10
Transfers Into or Out of Level 3, Net	18
Ending Fair Value	104	78	75
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			162
Transfers Into or Out of Level 3, Net			(162)
Mortgage Loans On Real Estate [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	(1)
Gains (Losses) in OCI and Other	(10)
Issuances, Sales, Maturities, Settlements, Calls, Net	56
Transfers Into or Out of Level 3, Net	787
Ending Fair Value	832
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	666	67	49
Items Included in Net Income	11	17	(5)
Issuances, Sales, Maturities, Settlements, Calls, Net	(32)	850	30
Transfers Into or Out of Level 3, Net	(1)	(268)	(7)
Ending Fair Value	644	666	67
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	30	25
Items Included in Net Income	4	(12)	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	20	17
Transfers Into or Out of Level 3, Net	5		26
Ending Fair Value	59	30	25
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	868	534	30
Items Included in Net Income	986	10	170
Gains (Losses) in OCI and Other	267	163	(69)
Issuances, Sales, Maturities, Settlements, Calls, Net	(363)	161	403
Transfers Into or Out of Level 3, Net	(216)
Ending Fair Value	1,542	868	534
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	450	123	903
Items Included in Net Income		327	(780)
Ending Fair Value	450	450	123
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(9)
Items Included in Net Income		(9)
Ending Fair Value		(9)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	60	72	51
Items Included in Net Income	22	(12)	21
Ending Fair Value	82	60	72
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(9)		(67)
Items Included in Net Income	9		67
Ending Fair Value		(9)
Indexed Annuity And IUL Contracts [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	927
Items Included in Net Income	538
Issuances, Sales, Maturities, Settlements, Calls, Net	(915)
Ending Fair Value	550	927
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	927	902	11
Items Included in Net Income		158	(117)
Issuances, Sales, Maturities, Settlements, Calls, Net		(133)	1,008
Ending Fair Value		927	902
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(2,585)	(1,305)	(1,418)
Items Included in Net Income	(1,009)	(900)	198
Issuances, Sales, Maturities, Settlements, Calls, Net		(380)	(85)
Ending Fair Value	$ (3,594)	$ (2,585)	$ (1,305)

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