Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2018		Jun. 30, 2017		Jun. 30, 2018		Jun. 30, 2017
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 3,505		$ 2,224		$ 3,139		$ 1,545
Items Included in Net Income		(55)		41		486		369
Gains (Losses) in OCI and Other		(162)	[1]	127	[1]	(167)		224
Issuances, Sales, Maturities, Settlements, Calls, Net		258	[2]	39		320	[2]	146
Transfers Into or Out of Level 3, Net		(70)	[3],[4]	(107)	[3]	(302)		40
Ending Fair Value		3,476		2,324		3,476		2,324
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		3,192	[5]	2,403	[5]	3,091		2,405
Items Included in Net Income		3	[5]	5	[5]	6		11
Gains (Losses) in OCI and Other		(124)	[1],[5]	53	[1],[5]	(107)		118
Issuances, Sales, Maturities, Settlements, Calls, Net		157	[2],[5]	57	[5]	231	[2]	(147)
Transfers Into or Out of Level 3, Net		(47)	[3],[4],[5]	(1)	[3],[5]	(40)		130
Ending Fair Value	[5]	3,181		2,517		3,181		2,517
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net		67				67
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		26	[5]	29	[5]	27		33
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other			[1],[5]		[1],[5]	(1)		1
Issuances, Sales, Maturities, Settlements, Calls, Net		5	[2],[5]		[5]	5	[2]
Transfers Into or Out of Level 3, Net			[3],[4],[5]	14	[3],[5]			9
Ending Fair Value	[5]	31		43		31		43
ABS [Member] | Fixed Maturity AFS Securities [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net		17				17
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		5	[5]	5	[5]	5
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2]	(5)	[5]			(5)
Transfers Into or Out of Level 3, Net			[3],[4],[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		108	[5]	110	[5]	110		111
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other			[1],[5]	(1)	[1],[5]	(2)		(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net	[3],[4],[5]
Ending Fair Value	[5]	108		109		108		109
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value				7		12		3
Items Included in Net Income
Gains (Losses) in OCI and Other	[1]
Issuances, Sales, Maturities, Settlements, Calls, Net								4
Transfers Into or Out of Level 3, Net					[3]	(12)
Ending Fair Value				7				7
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		27	[5]	44	[5]	6		7
Items Included in Net Income			[5]			1
Gains (Losses) in OCI and Other			[1],[5]	1	[1],[5]			1
Issuances, Sales, Maturities, Settlements, Calls, Net		(1)	[2],[5]	14	[5]	19	[2]	55
Transfers Into or Out of Level 3, Net		(21)	[3],[4],[5]	(38)	[3],[5]	(21)		(42)
Ending Fair Value	[5]	5		21		5		21
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		2	[5]	88	[5]	91		68
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net		145	[2],[5]	13	[5]	147	[2]	18
Transfers Into or Out of Level 3, Net		(2)	[3],[4],[5]	(73)	[3],[5]	(93)		(58)
Ending Fair Value	[5]	145		28		145		28
State And Municipal Bonds [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]			1
Transfers Into or Out of Level 3, Net	[3],[5]			(1)
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								1
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		77	[5]	79	[5]	76		76
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other		1	[1],[5]	8	[1],[5]	2		11
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net			[3],[4],[5]	(5)	[3],[5]			(5)
Ending Fair Value	[5]	78		82		78		82
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value				182	[5]	162		177
Items Included in Net Income								1
Gains (Losses) in OCI and Other								(1)
Issuances, Sales, Maturities, Settlements, Calls, Net				1	[5]			6
Transfers Into or Out of Level 3, Net						(162)
Ending Fair Value	[5]			183				183
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		47	[5]	60	[5]	49		65
Items Included in Net Income		(3)	[5]	1	[5]	(5)		2
Gains (Losses) in OCI and Other			[1],[5]	1	[1],[5]			8
Issuances, Sales, Maturities, Settlements, Calls, Net		(22)	[2],[5]			(22)	[2]	(16)
Transfers Into or Out of Level 3, Net	[3],[5]		[4]	(3)
Ending Fair Value	[5]	22		59		22		59
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	27
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]	(1)
Transfers Into or Out of Level 3, Net			[3],[4],[5]			26
Ending Fair Value	[5]	26				26
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		279	[5]	112	[5]	30		(93)
Items Included in Net Income		(108)	[5]	58	[5]	222		(11)
Gains (Losses) in OCI and Other		(39)	[1],[5]	65	[1],[5]	(59)		88
Issuances, Sales, Maturities, Settlements, Calls, Net		(39)	[2],[5]	(80)	[5]	(100)	[2]	171
Transfers Into or Out of Level 3, Net	[3],[4],[5]
Ending Fair Value	[5]	93		155		93		155
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		1,110	[6]	226	[6]	903
Items Included in Net Income		138	[6]	72	[6]	345		298
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[6]
Transfers Into or Out of Level 3, Net	[3],[4],[6]
Ending Fair Value	[6]	1,248		298		1,248		298
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value								(371)
Items Included in Net Income								371
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		45	[6]	116	[6]	51		203
Items Included in Net Income		(4)	[6]	(31)	[6]	(10)		(118)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[6]
Transfers Into or Out of Level 3, Net	[3],[4],[6]
Ending Fair Value	[6]	41		85		41		85
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		(111)	[6]			(67)
Items Included in Net Income		(20)	[6]			(64)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[6]
Transfers Into or Out of Level 3, Net	[3],[4],[6]
Ending Fair Value	[6]	(131)				(131)
Indexed Annuity And Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		17	[6]			11
Items Included in Net Income		1	[6]			1
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2]	11	[6]			17
Transfers Into or Out of Level 3, Net	[3],[4],[6]
Ending Fair Value	[6]	29				29
Indexed Annuity And Embedded Derivatives [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		(1,346)	[6]	(1,238)	[6]	(1,418)		(1,139)
Items Included in Net Income		(62)	[6]	(64)	[6]	(10)		(184)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net		8	[2],[6]	34	[6]	28	[2]	55
Transfers Into or Out of Level 3, Net	[3],[4],[6]
Ending Fair Value	[6]	$ (1,400)		$ (1,268)		$ (1,400)		$ (1,268)

[1] The changes in fair value of the interest rate swaps are offset by an adjustment to derivative investments (see Note 5).

[2] Net issuances, sales, maturities, settlements, calls, net include financial instruments acquired from Liberty Life as follows: corporate bonds of $67 million and asset-backed securities of $17 million.

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

[4] Transfers into or out of Level 3 for FHLB stock between equity securities and other investments 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).