Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 2,547		$ 3,730		$ 2,275
Items Included in Net Income		(795)		(1,375)		1,210
Gains (Losses) in OCI and Other	[1]	(173)		403		109
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net		132		129		316
Transfers In or Out of Level 3, Net	[2]	88		(340)	[3]	(180)
Ending Fair Value		1,799		2,547		3,730
Corporate bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	1,953		1,701		1,491
Items Included in Net Income	[4]	4		9		(18)
Gains (Losses) in OCI and Other	[1],[4]	(140)		27		(2)
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	118		197		316
Transfers In or Out of Level 3, Net	[2],[4]	58		19	[3]	(86)
Ending Fair Value	[4]	1,993		1,953		1,701
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	33		10		14
Gains (Losses) in OCI and Other	[1],[4]			1		1
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	12				29
Transfers In or Out of Level 3, Net	[2],[4]			22	[3]	(34)
Ending Fair Value	[4]	45		$ 33		10
U.S. government bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]					$ 1
Items Included in Net Income	[4]
Gains (Losses) in OCI and Other	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]					$ (1)
Transfers In or Out of Level 3, Net	[2],[4]
Ending Fair Value	[4]
Foreign government bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	109		$ 79		$ 46
Gains (Losses) in OCI and Other	[1],[4]	2		5
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]					33
Transfers In or Out of Level 3, Net	[2],[3],[4]			25
Ending Fair Value	[4]	111		109		79
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	1		1		3
Items Included in Net Income	[4]	$ 4
Gains (Losses) in OCI and Other	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	$ (4)				(2)
Transfers In or Out of Level 3, Net	[2],[4]
Ending Fair Value	[4]	$ 1		1		1
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	15		20		27
Items Included in Net Income	[4]	2				1
Gains (Losses) in OCI and Other	[1],[4]	8		2		6
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	(15)		(13)		(6)
Transfers In or Out of Level 3, Net	[2],[4]			6	[3]	(8)
Ending Fair Value	[4]	10		15		20
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	368		179		154
Items Included in Net Income	[4]			(3)		(1)
Gains (Losses) in OCI and Other	[1],[4]	1		7		4
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	194		136		50
Transfers In or Out of Level 3, Net	[2],[4]	(12)		49	[3]	(28)
Ending Fair Value	[4]	551		368		179
State and municipal bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]			28		32
Gains (Losses) in OCI and Other	[1],[4]			1		(4)
Transfers In or Out of Level 3, Net	[2],[3],[4]			(29)
Ending Fair Value	[4]					28
Hybrid and redeemable preferred securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	55		66		118
Items Included in Net Income	[4]	(1)
Gains (Losses) in OCI and Other	[1],[4]	(3)		(1)		13
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]			(5)		(35)
Transfers In or Out of Level 3, Net	[2],[4]	43		(5)	[3]	(30)
Ending Fair Value	[4]	94		55		66
Available-for-sale equity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	157		161		87
Items Included in Net Income	[4]	2		4		(1)
Gains (Losses) in OCI and Other	[1],[4]	3		(3)		2
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	3		(5)		73
Transfers In or Out of Level 3, Net	[2],[4]	(1)
Ending Fair Value	[4]	164		157		161
Trading securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	73		52		56
Items Included in Net Income	[4]	3		4		3
Gains (Losses) in OCI and Other	[1],[4]	(3)		8		(7)
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]			10		(6)
Transfers In or Out of Level 3, Net	[2],[4]			(1)	[3]	6
Ending Fair Value	[4]	73		73		52
Derivative investments
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]	989		1,266		2,026
Items Included in Net Income	[4]	(90)		72		(681)
Gains (Losses) in OCI and Other	[1],[4]	(41)		356		96
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[4]	(303)		(279)		(175)
Transfers In or Out of Level 3, Net	[2],[3],[4]			(426)
Ending Fair Value	[4]	555		989		1,266
GLB embedded derivative reserves | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]			1,244		(909)
Items Included in Net Income	[5]					2,153
Transfers In or Out of Level 3, Net	[2],[3],[5]			(1,244)
Ending Fair Value	[5]					1,244
GLB embedded derivative reserves | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	(174)		(27)
Items Included in Net Income	[5]	(779)		(1,391)
Transfers In or Out of Level 3, Net	[2],[3],[5]			1,244
Ending Fair Value	[5]	(953)		(174)		(27)
Other Assets Reinsurance Recoverable [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	154		27
Items Included in Net Income	[5]	114		127
Ending Fair Value	[5]	268		154		27
Embedded derivatives - Indexed annuity and IUL contracts [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	(1,170)		(1,048)		(732)
Items Included in Net Income	[5]	(57)		(210)		(356)
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	127		88		40
Ending Fair Value	[5]	(1,100)		(1,170)		(1,048)
Variable Interest Entities Liabilities - Derivative Instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(13)		(27)		(128)
Items Included in Net Income		9	[6]	14		101	[6]
Ending Fair Value	[6]	(4)		(13)		(27)
Credit default swaps | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[7]	(3)		(2)		(11)
Items Included in Net Income	[7]	(6)		(1)		9
Ending Fair Value	[7]	$ (9)		$ (3)		$ (2)

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

[2] 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-year amortized cost and beginning-of-year fair value was included in OCI and earnings, respectively, in prior years.

[3] Transfers into or out of Level 3 for GLB reserves embedded derivatives between future contract benefits, other assets and other liabilities on our Consolidated Balance Sheets.

[4] 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).

[5] Gains (losses) from sales, maturities, settlements and calls 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 net investment income 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).