Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 4,014		$ 3,139		$ 1,545
Items Included in Net Income		(417)		(437)		650
Gains (Losses) in OCI and Other	[1]	353		(271)		347
Issuances, Sales, Maturities, Settlements, Calls, Net		2,013	[2]	2,045		410
Transfers Into or Out of Level 3, Net	[4]	(822)	[3]	(462)		187
Ending Fair Value		5,141		4,014		3,139
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	3,269		3,091		2,405
Items Included in Net Income	[5]	3		10		19
Gains (Losses) in OCI and Other	[1],[5]	180		(199)		198
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	878	[2]	429		99
Transfers Into or Out of Level 3, Net	[4],[5]	(49)	[3]	(62)		370
Ending Fair Value	[5]	4,281		3,269		3,091
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net		67
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	134
Gains (Losses) in OCI and Other	[1],[5]	1
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]	619
Transfers Into or Out of Level 3, Net	[3],[4],[5]	(486)
Ending Fair Value	[5]	268		134
ABS [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net		17
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]			(5)
Transfers Into or Out of Level 3, Net	[4]	5	[3]			5	[5]
Ending Fair Value		5				5	[5]
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	109		110		111
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]	6		(1)		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]	(25)
Transfers Into or Out of Level 3, Net	[3],[4],[5]
Ending Fair Value	[5]	90		109		110
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	7		12		3
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	21	[2]	7		20
Transfers Into or Out of Level 3, Net	[4],[5]	(17)	[3]	(12)		(11)
Ending Fair Value	[5]	11		7		12
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	2		6		7
Items Included in Net Income	[5]	1
Gains (Losses) in OCI and Other	[1],[5]					1
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	5	[2]	35		54
Transfers Into or Out of Level 3, Net	[4],[5]	(7)	[3]	(39)		(56)
Ending Fair Value	[5]	1		2		6
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	134		118		101
Gains (Losses) in OCI and Other	[1],[5]			(1)		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]			223		124
Transfers Into or Out of Level 3, Net	[4],[5]			(206)		(106)
Ending Fair Value	[5]			134		118
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income						(1)
Transfers Into or Out of Level 3, Net	[4]					1
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	75		76		76
Gains (Losses) in OCI and Other	[1],[5]	3		(1)		15
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]					(1)
Transfers Into or Out of Level 3, Net	[4],[5]					(14)
Ending Fair Value	[5]	78		75		76
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]			162
Transfers Into or Out of Level 3, Net	[4],[5]			(162)
Ending Fair Value	[5]					162
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	67		49		65
Items Included in Net Income	[5]	17		(5)		3
Gains (Losses) in OCI and Other	[1],[5]					8
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	850	[2]	30		(26)
Transfers Into or Out of Level 3, Net	[4],[5]	(268)	[3]	(7)		(1)
Ending Fair Value	[5]	666		67		49
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	25		162		177
Items Included in Net Income		(12)	[5]	(1)		1	[5]
Gains (Losses) in OCI and Other	[1],[5]					(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	17	[2]			(13)
Transfers Into or Out of Level 3, Net	[4]			26		(1)	[5]
Ending Fair Value	[5]	30		25		162
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	534		30		(93)
Items Included in Net Income	[5]	10		170		(27)
Gains (Losses) in OCI and Other	[1],[5]	163		(69)		129
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	161	[2]	403		21
Ending Fair Value	[5]	868		534		30
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	123		903
Items Included in Net Income		327	[6]	(780)	[6]	903
Ending Fair Value	[6]	450		123		903
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]			(67)
Items Included in Net Income	[6]			67		(67)
Ending Fair Value	[6]					(67)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		72	[6]	51	[6]	203
Items Included in Net Income		(12)	[6]	21	[6]	(152)
Ending Fair Value	[6]	60		72		51
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	[6]	(9)
Ending Fair Value	[6]	(9)
Indexed Annuity And IUL Contracts [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	902
Items Included in Net Income	[6]	158
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[6]	(133)
Ending Fair Value	[6]	927		902
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	902		11
Items Included in Net Income	[6]			(117)
Issuances, Sales, Maturities, Settlements, Calls, Net				1,008	[6]	11
Ending Fair Value	[6]			902		11
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(1,305)		(1,418)		(1,139)
Items Included in Net Income	[6]	(900)		198		(400)
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	(380)	[2]	(85)		121
Ending Fair Value	[6]	$ (2,585)		$ (1,305)		(1,418)
Credit Default Swaps [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value						(371)
Items Included in Net Income						$ 371

[1] The changes in fair value of the interest rate swaps are offset by an adjustment to derivative investments (see Note 6).

[2] Issuances, sales, maturities, settlements, calls, net, includes financial instruments acquired in the Liberty Life transaction as follows: corporate bonds of $67 million and ABS of $17 million.

[3] Transfers into or out of Level 3 for FHLB stock between equity securities and other investments are reported at cost on our Consolidated Balance Sheets.

[4] Transfers into or out of Level 3 for fixed maturity AFS and trading securities are reported at amortized cost as of the beginning-of-year. For fixed maturity AFS and trading securities, the difference between beginning-of-year amortized cost and beginning-of-year fair value was included in OCI and earnings, respectively, in the prior years.

[5] Amortization and accretion of premiums and discounts are included in net investment income on our Consolidated Statements of Comprehensive Income (Loss). Gains (losses) from sales, maturities, settlements and calls and OTTI are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).

[6] Gains (losses) from sales, maturities, settlements and calls are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).