Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 7,267	$ 6,560	$ 7,337	$ 6,200
Items Included in Net Income	854	161	943	(498)
Gains (Losses) in OCI and Other	195	73	284	290
Issuances, Sales, Maturities, Settlements, Calls, Net	(612)	377	(885)	1,618
Transfers Into or Out of Level 3, Net	(332)	(235)	(307)	(674)
Ending Fair Value	7,372	6,936	7,372	6,936
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	6,975	6,061	6,978	5,652
Items Included in Net Income	(7)	3	(6)	3
Gains (Losses) in OCI and Other	191	(49)	17	44
Issuances, Sales, Maturities, Settlements, Calls, Net	64	239	146	641
Transfers Into or Out of Level 3, Net	(16)	51	72	(35)
Ending Fair Value	7,207	6,305	7,207	6,305
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	5		5
Transfers Into or Out of Level 3, Net	(5)		(5)
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	86	113	90	109
Gains (Losses) in OCI and Other		2	(4)	6
Issuances, Sales, Maturities, Settlements, Calls, Net	(20)		(20)
Ending Fair Value	66	115	66	115
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	2		11	7
Issuances, Sales, Maturities, Settlements, Calls, Net		10		10
Transfers Into or Out of Level 3, Net			(9)	(7)
Ending Fair Value	2	10	2	10
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	2	1	2
Issuances, Sales, Maturities, Settlements, Calls, Net		7		7
Ending Fair Value	1	9	1	9
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	424	320	268	134
Gains (Losses) in OCI and Other	3	1	5	2
Issuances, Sales, Maturities, Settlements, Calls, Net	60	69	317	477
Transfers Into or Out of Level 3, Net	(74)	(173)	(177)	(396)
Ending Fair Value	413	217	413	217
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	90	78	78	75
Gains (Losses) in OCI and Other	1		(1)	3
Issuances, Sales, Maturities, Settlements, Calls, Net	13		9
Transfers Into or Out of Level 3, Net			18
Ending Fair Value	104	78	104	78
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	673	523	666	67
Items Included in Net Income	2	10	(2)	12
Issuances, Sales, Maturities, Settlements, Calls, Net	(119)	146	(139)	723
Transfers Into or Out of Level 3, Net	(21)	(113)	10	(236)
Ending Fair Value	535	566	535	566
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	29	68	30	25
Items Included in Net Income	2	(11)	1	(11)
Issuances, Sales, Maturities, Settlements, Calls, Net	18	(3)	18	40
Ending Fair Value	49	54	49	54
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	595	466	868	533
Items Included in Net Income	958	183	555	(129)
Gains (Losses) in OCI and Other		119	267	235
Issuances, Sales, Maturities, Settlements, Calls, Net	(189)	23	(326)	152
Transfers Into or Out of Level 3, Net	(216)		(216)
Ending Fair Value	1,148	791	1,148	791
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			450	123
Items Included in Net Income			(450)	(123)
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(3,086)	(1)
Items Included in Net Income	1,980	(845)	(1,106)	(846)
Ending Fair Value	(1,106)	(846)	(1,106)	(846)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	3,081	111	60	72
Items Included in Net Income	(1,976)	733	1,045	772
Ending Fair Value	1,105	844	1,105	844
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		(111)	(510)	(196)
Items Included in Net Income		111	510	196
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	664	903	927	902
Items Included in Net Income	295	7	484	128
Issuances, Sales, Maturities, Settlements, Calls, Net	(423)	(19)	(875)	(139)
Ending Fair Value	536	891	536	891
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(2,272)	(1,973)	(2,585)	(1,305)
Items Included in Net Income	(400)	(30)	(88)	(500)
Issuances, Sales, Maturities, Settlements, Calls, Net	(16)	(95)	(15)	(293)
Ending Fair Value	$ (2,688)	$ (2,098)	$ (2,688)	$ (2,098)