Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 3,730		$ 2,275		$ 2,051
Items Included in Net Income	(1,375)		1,210		501
Gains (Losses) in OCI and Other	403	[1]	109	[1]	262	[1]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	129		316		349
Transfers In or Out of Level 3, Net	(340)	[2],[3]	(180)	[2]	(888)	[2]
Ending Fair Value	2,547		3,730		2,275
Corporate bonds [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,701	[4]	1,491	[4]	1,830	[4]
Items Included in Net Income	9	[4]	(18)	[4]	(27)	[4]
Gains (Losses) in OCI and Other	27	[1],[4]	(2)	[1],[4]	33	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	197	[4]	316	[4]	269	[4]
Transfers In or Out of Level 3, Net	19	[2],[3],[4]	(86)	[2],[4]	(614)	[2],[4]
Ending Fair Value	1,953	[4]	1,701	[4]	1,491	[4]
Asset-backed Securities [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	10	[4]	14	[4]	58	[4]
Gains (Losses) in OCI and Other	1	[1],[4]	1	[1],[4]	1	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net			29	[4]	(3)	[4]
Transfers In or Out of Level 3, Net	22	[2],[3],[4]	(34)	[2],[4]	(42)	[2],[4]
Ending Fair Value	33	[4]	10	[4]	14	[4]
U.S. government bonds [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			1	[4]	1	[4]
Items Included in Net Income				[4]		[4]
Gains (Losses) in OCI and Other				[1],[4]		[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net			(1)	[4]		[4]
Transfers In or Out of Level 3, Net				[2],[4]		[2],[4]
Ending Fair Value				[4]	1	[4]
Foreign government bonds [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	79	[4]	46	[4]	97	[4]
Gains (Losses) in OCI and Other	5	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net			33	[4]	(5)	[4]
Transfers In or Out of Level 3, Net	25	[2],[3],[4]			(46)	[2],[4]
Ending Fair Value	109	[4]	79	[4]	46	[4]
RMBS [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	[4]	3	[4]	158	[4]
Items Included in Net Income		[4]			(3)	[4]
Gains (Losses) in OCI and Other		[1],[4]			3	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net		[4]	(2)	[4]	(8)	[4]
Transfers In or Out of Level 3, Net		[2],[3],[4]			(147)	[2],[4]
Ending Fair Value	1	[4]	1	[4]	3	[4]
CMBS [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	20	[4]	27	[4]	34	[4]
Items Included in Net Income			1	[4]	(11)	[4]
Gains (Losses) in OCI and Other	2	[1],[4]	6	[1],[4]	18	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	(13)	[4]	(6)	[4]	(12)	[4]
Transfers In or Out of Level 3, Net	6	[2],[3],[4]	(8)	[2],[4]	(2)	[2],[4]
Ending Fair Value	15	[4]	20	[4]	27	[4]
CLOs [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	179	[4]	154	[4]	102	[4]
Items Included in Net Income	(3)	[4]	(1)	[4]	(2)	[4]
Gains (Losses) in OCI and Other	7	[1],[4]	4	[1],[4]	8	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	136	[4]	50	[4]	61	[4]
Transfers In or Out of Level 3, Net	49	[2],[3],[4]	(28)	[2],[4]	(15)	[2],[4]
Ending Fair Value	368	[4]	179	[4]	154	[4]
State and municipal bonds [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	28	[4]	32	[4]
Gains (Losses) in OCI and Other	1	[1],[4]	(4)	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net					32	[4]
Transfers In or Out of Level 3, Net	(29)	[2],[3],[4]
Ending Fair Value			28	[4]	32	[4]
Hybrid and redeemable preferred securities [Member] | Fixed maturity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	66	[4]	118	[4]	100	[4]
Items Included in Net Income					(1)	[4]
Gains (Losses) in OCI and Other	(1)	[1],[4]	13	[1],[4]	24	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	(5)	[4]	(35)	[4]
Transfers In or Out of Level 3, Net	(5)	[2],[3],[4]	(30)	[2],[4]	(5)	[2],[4]
Ending Fair Value	55	[4]	66	[4]	118	[4]
Equity securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	161	[4]	87	[4]	56	[4]
Items Included in Net Income	4	[4]	(1)	[4]	(8)	[4]
Gains (Losses) in OCI and Other	(3)	[1],[4]	2	[1],[4]	13	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	(5)	[4]	73	[4]	26	[4]
Ending Fair Value	157	[4]	161	[4]	87	[4]
Trading securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	52	[4]	56	[4]	68	[4]
Items Included in Net Income	4	[4]	3	[4]	3	[4]
Gains (Losses) in OCI and Other	8	[1],[4]	(7)	[1],[4]	4	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	10	[4]	(6)	[4]	(2)	[4]
Transfers In or Out of Level 3, Net	(1)	[2],[3],[4]	6	[2],[4]	(17)	[2],[4]
Ending Fair Value	73	[4]	52	[4]	56	[4]
Derivative investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,266	[4]	2,026	[4]	2,470	[4]
Items Included in Net Income	72	[4]	(681)	[4]	(790)	[4]
Gains (Losses) in OCI and Other	356	[1],[4]	96	[1],[4]	158	[1],[4]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	(279)	[4]	(175)	[4]	188	[4]
Transfers In or Out of Level 3, Net	(426)	[2],[3],[4]
Ending Fair Value	989	[4]	1,266	[4]	2,026	[4]
Other assets - reinsurance recoverable [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	27	[4]
Items Included in Net Income	127	[4]
Ending Fair Value	154	[4]
Indexed annuity and IUL contracts embedded derivatives [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(1,048)	[5]	(732)	[5]	(399)	[5]
Items Included in Net Income	(210)	[5]	(356)	[5]	(136)	[5]
Purchases, Issuances, Sales, Maturities, Settlements, Calls, Net	88	[5]	40	[5]	(197)	[5]
Ending Fair Value	(1,170)	[5]	(1,048)	[5]	(732)	[5]
GLB embedded derivative reserves [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,244	[5]	(909)	[5]	(2,217)	[5]
Items Included in Net Income			2,153	[5]	1,308	[5]
Transfers In or Out of Level 3, Net	(1,244)	[2],[3],[5]
Ending Fair Value			1,244	[5]	(909)	[5]
GLB embedded derivative reserves [Member] | Other liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(27)	[5]
Items Included in Net Income	(1,391)	[5]
Transfers In or Out of Level 3, Net	1,244	[2],[3],[5]
Ending Fair Value	(174)	[5]
VIEs' liabilities - derivative instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(27)	[6]	(128)	[6]	(291)	[6]
Items Included in Net Income	14	[6]	101	[6]	163	[6]
Ending Fair Value	(13)	[6]	(27)	[6]	(128)	[6]
Credit default swaps [Member] | Other liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(2)	[7]	(11)	[7]	(16)	[7]
Items Included in Net Income	(1)	[7]	9	[7]	5	[7]
Ending Fair Value	$ (3)	[7]	$ (2)	[7]	$ (11)	[7]

[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).