Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 3,139		$ 1,545		$ 1,799
Items Included in Net Income		(437)		650		(73)
Gains (Losses) in OCI and Other	[1]	(271)		347		(42)
Issuances, Sales, Maturities, Settlements, Calls, Net		2,045	[2]	410		245
Transfers Into or Out of Level 3, Net	[3]	(462)	[4]	187		(384)
Ending Fair Value		4,014		3,139		1,545
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	3,091		2,405		1,993
Items Included in Net Income	[5]	10		19		4
Gains (Losses) in OCI and Other	[1],[5]	(199)		198		(31)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	429	[2]	99		58
Transfers Into or Out of Level 3, Net	[3],[5]	(62)	[4]	370		381
Ending Fair Value	[5]	3,269		3,091		2,405
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]	27		33		45
Gains (Losses) in OCI and Other	[1],[5]	(1)		(1)		(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	5	[2]			14
Transfers Into or Out of Level 3, Net	[3],[5]	(2)	[4]	(5)		(24)
Ending Fair Value	[5]	29		27		33
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)	[2]			8
Transfers Into or Out of Level 3, Net	[3],[5]			5		(8)
Ending Fair Value	[5]			5
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	110		111		111
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]	(1)		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net	[3],[4],[5]
Ending Fair Value	[5]	109		110		111
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	12		3		1
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	7	[2]	20		66
Transfers Into or Out of Level 3, Net	[3],[5]	(12)	[4]	(11)		(64)
Ending Fair Value	[5]	7		12		3
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	6		7		10
Items Included in Net Income	[5]					2
Gains (Losses) in OCI and Other	[1],[5]			1		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	35	[2]	54		27
Transfers Into or Out of Level 3, Net	[3],[5]	(39)	[4]	(56)		(31)
Ending Fair Value	[5]	2		6		7
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	91		68		551
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	218	[2]	124		138
Transfers Into or Out of Level 3, Net	[3],[5]	(204)	[4]	(101)		(621)
Ending Fair Value	[5]	105		91		68
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	[5]			(1)
Transfers Into or Out of Level 3, Net	[3],[5]			1
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	76		76		94
Gains (Losses) in OCI and Other	[1],[5]	(1)		15		(3)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]			(1)		(15)
Transfers Into or Out of Level 3, Net	[3],[5]			(14)
Ending Fair Value	[5]	75		76		76
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	162		177
Items Included in Net Income	[5]			1
Gains (Losses) in OCI and Other	[1],[5]			(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]			(13)
Transfers Into or Out of Level 3, Net	[3],[5]	(162)	[4]	(1)
Ending Fair Value	[5]			162		177
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	49		65		73
Items Included in Net Income	[5]	(5)		3		4
Gains (Losses) in OCI and Other	[1],[5]			8
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	30	[2]	(26)		5
Transfers Into or Out of Level 3, Net	[3],[5]	(7)	[4]	(1)		(17)
Ending Fair Value	[5]	67		49		65
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]			177		164
Items Included in Net Income	[5]	(1)				5
Gains (Losses) in OCI and Other	[1],[5]					(4)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]					12
Transfers Into or Out of Level 3, Net	[3],[4],[5]	26
Ending Fair Value	[5]	25				177
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	30		(93)		555
Items Included in Net Income	[5]	170		(27)		(483)
Gains (Losses) in OCI and Other	[1],[5]	(69)		129		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	403	[2]	21		(164)
Ending Fair Value	[5]	534		30		(93)
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	903
Items Included in Net Income	[6]	(780)		903
Ending Fair Value	[6]	123		903
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(67)		(371)		(953)
Items Included in Net Income	[6]			(67)		582
Ending Fair Value	[6]			(67)		(371)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	51		203		268
Items Included in Net Income	[6]	21		(152)		(65)
Ending Fair Value	[6]	72		51		203
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(67)
Items Included in Net Income	[6]	67
Ending Fair Value	[6]			(67)
Indexed Annuity And Embedded Derivatives [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	11
Items Included in Net Income	[6]	(117)
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[6]	1,008
Ending Fair Value	[6]	902		11
Indexed Annuity And Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	11
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]			11
Ending Fair Value	[6]			11
Indexed Annuity And Embedded Derivatives [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(1,418)		(1,139)		(1,100)
Items Included in Net Income	[6]	198		(400)		(120)
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	(85)	[2]	121		81
Ending Fair Value	[6]	$ (1,305)		(1,418)		(1,139)
VIEs' liabilities - derivative instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[7]					(4)
Items Included in Net Income	[7]					4
Credit Default Swaps [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value				(371)	[6]	(9)	[7]
Items Included in Net Income				$ 371	[6]	(6)	[7]
Issuances, Sales, Maturities, Settlements, Calls, Net	[7]					15
Ending Fair Value	[6]					$ (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, include financial instruments acquired from Liberty Life as follows: corporate bonds of $67 million and ABS of $17 million.

[3] Transfers into or out of Level 3 for AFS and trading securities are reported at amortized cost as of the beginning-of-year. For 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.

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

[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).

[7] The changes in fair value of the credit default swaps and contingency forwards are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).