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, 2018		Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 3,476		$ 2,324	$ 3,139		$ 1,545
Items Included in Net Income		58		177	541		546
Gains (Losses) in OCI and Other	[1]	(86)		46	(252)		270
Issuances, Sales, Maturities, Settlements, Calls, Net		567	[2]	(101)	889	[2]	45
Transfers Into or Out of Level 3, Net	[3]	(148)		(7)	(450)	[4]	33
Ending Fair Value		3,867		2,439	3,867		2,439
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	3,181		2,517	3,091		2,405
Items Included in Net Income	[5]	1		4	7		15
Gains (Losses) in OCI and Other	[1],[5]	(30)		35	(137)		153
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	88	[2]	(35)	319	[2]	(182)
Transfers Into or Out of Level 3, Net	[3],[5]	(31)		59	(71)	[4]	189
Ending Fair Value	[5]	3,209		2,580	3,209		2,580
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	[5]	31		43	27		33
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]			(1)	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]		[2]		5	[2]
Transfers Into or Out of Level 3, Net	[3],[5]			(15)			(6)
Ending Fair Value	[5]	31		27	31		27
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
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]				(5)
Transfers Into or Out of Level 3, Net	[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]	108		109	110		111
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]			1	(2)		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net	[3],[5]
Ending Fair Value	[5]	108		110	108		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]	7	[2]	6	7	[2]	10
Transfers Into or Out of Level 3, Net	[3],[5]				(12)	[4]
Ending Fair Value	[5]	7		13	7		13
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	5		21	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]	18	[2]	(1)	37	[2]	54
Transfers Into or Out of Level 3, Net	[3],[5]			(14)	(21)	[4]	(56)
Ending Fair Value	[5]	23		6	23		6
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	145		28	91		68
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	17	[2]	15	164	[2]	33
Transfers Into or Out of Level 3, Net	[3],[5]	(111)		(28)	(204)	[4]	(86)
Ending Fair Value	[5]	51		15	51		15
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]	78		82	76		76
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]	(1)		3	1		14
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net	[3],[5]			(9)			(14)
Ending Fair Value	[5]	77		76	77		76
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]			183	162		177
Items Included in Net Income	[5]						1
Gains (Losses) in OCI and Other	[1],[5]			(1)			(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]			9			15
Transfers Into or Out of Level 3, Net	[3],[5]			(1)	(162)	[4]	(1)
Ending Fair Value	[5]			190			190
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	22		59	49		65
Items Included in Net Income	[5]				(5)		2
Gains (Losses) in OCI and Other	[1],[5]						8
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	2	[2]	(10)	(20)	[2]	(26)
Transfers Into or Out of Level 3, Net	[3],[5]	(6)		1	(6)	[4]	1
Ending Fair Value	[5]	18		50	18		50
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	26
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]
Transfers Into or Out of Level 3, Net	[3],[5]				26	[4]
Ending Fair Value	[5]	26			26
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	93		155	30		(93)
Items Included in Net Income	[5]	(115)		(13)	106		(25)
Gains (Losses) in OCI and Other	[1],[5]	(55)		9	(113)		97
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	431	[2]	(85)	331	[2]	87
Transfers Into or Out of Level 3, Net	[3],[5]
Ending Fair Value	[5]	354		66	354		66
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	1,248		298	903
Items Included in Net Income	[6]	400		272	745		570
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],[6]
Ending Fair Value	[6]	1,648		570	1,648		570
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]						(371)
Items Included in Net Income	[6]						371
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	41		85	51		203
Items Included in Net Income	[6]	(6)		(32)	(16)		(150)
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],[6]
Ending Fair Value	[6]	35		53	35		53
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(131)			(67)
Items Included in Net Income	[6]	(62)		(7)	(126)		(7)
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],[6]
Ending Fair Value	[6]	(193)		(7)	(193)		(7)
Indexed Annuity And Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	29			11
Items Included in Net Income	[6]	4			4
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	11	[2]	3	29	[2]	3
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	44		3	44		3
Indexed Annuity And Embedded Derivatives [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(1,400)		(1,268)	(1,418)		(1,139)
Items Included in Net Income	[6]	(164)		(47)	(175)		(230)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	(7)	[2]	(3)	22	[2]	51
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	$ (1,571)		$ (1,318)	$ (1,571)		$ (1,318)

[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 ABS 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).