Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	$ 2,547		$ 3,730
Items Included in Net Income	(447)		(413)
Gains (Losses) in OCI and Other	30	[1]	168	[1]
Issuances, Sales, Maturities, Settlements, Calls, Net	(20)		(29)
Transfers In or Out of Level 3, Net	99	[2]	(199)	[2],[3]
Ending Fair Value	2,209		3,257
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,953	[4]	1,701	[4]
Items Included in Net Income	3	[4]	3	[4]
Gains (Losses) in OCI and Other	(31)	[1],[4]	23	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	29	[4]	19	[4]
Transfers In or Out of Level 3, Net	79	[2],[4]	200	[2],[3],[4]
Ending Fair Value	2,033	[4]	1,946	[4]
Asset-backed Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	33	[4]	10	[4]
Items Included in Net Income		[4]		[4]
Gains (Losses) in OCI and Other		[1],[4]	2	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net		[4]		[4]
Transfers In or Out of Level 3, Net		[2],[4]		[2],[3],[4]
Ending Fair Value	33	[4]	12	[4]
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	109	[4]	79	[4]
Items Included in Net Income		[4]		[4]
Gains (Losses) in OCI and Other	4	[1],[4]	3	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net		[4]		[4]
Transfers In or Out of Level 3, Net		[2],[4]	25	[2],[3],[4]
Ending Fair Value	113	[4]	107	[4]
RMBS [Member] | Fixed Maturity AFS 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]
Issuances, Sales, Maturities, Settlements, Calls, Net		[4]		[4]
Transfers In or Out of Level 3, Net		[2],[4]		[2],[3],[4]
Ending Fair Value	1	[4]	1	[4]
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	15	[4]	20	[4]
Items Included in Net Income	1	[4]		[4]
Gains (Losses) in OCI and Other	2	[1],[4]	1	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	(3)	[4]	(6)	[4]
Transfers In or Out of Level 3, Net		[2],[4]	6	[2],[3],[4]
Ending Fair Value	15	[4]	21	[4]
CLOs [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	368	[4]	179	[4]
Items Included in Net Income		[4]		[4]
Gains (Losses) in OCI and Other	3	[1],[4]	1	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	45	[4]	7	[4]
Transfers In or Out of Level 3, Net		[2],[4]	8	[2],[3],[4]
Ending Fair Value	416	[4]	195	[4]
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			28	[4]
Items Included in Net Income				[4]
Gains (Losses) in OCI and Other			1	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net				[4]
Transfers In or Out of Level 3, Net				[2],[3],[4]
Ending Fair Value			29	[4]
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	55	[4]	66	[4]
Items Included in Net Income		[4]		[4]
Gains (Losses) in OCI and Other		[1],[4]	(1)	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net		[4]		[4]
Transfers In or Out of Level 3, Net	20	[2],[4]	(10)	[2],[3],[4]
Ending Fair Value	75	[4]	55	[4]
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	157	[4]	161	[4]
Items Included in Net Income		[4]		[4]
Gains (Losses) in OCI and Other	2	[1],[4]	1	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	(24)	[4]		[4]
Transfers In or Out of Level 3, Net		[2],[4]		[2],[3],[4]
Ending Fair Value	135	[4]	162	[4]
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	73	[4]	52	[4]
Items Included in Net Income	1	[4]	1	[4]
Gains (Losses) in OCI and Other	2	[1],[4]	3	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	(1)	[4]	(1)	[4]
Transfers In or Out of Level 3, Net		[2],[4]	(2)	[2],[3],[4]
Ending Fair Value	75	[4]	53	[4]
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	989	[4]	1,266	[4]
Items Included in Net Income	(94)	[4]	(108)	[4]
Gains (Losses) in OCI and Other	48	[1],[4]	134	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	(94)	[4]	(55)	[4]
Transfers In or Out of Level 3, Net		[2],[4]	(426)	[2],[3],[4]
Ending Fair Value	849	[4]	811	[4]
GLB Embedded Derivative Reserves [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			27	[4],[5]
Items Included in Net Income			(249)	[4],[5]
Gains (Losses) in OCI and Other				[1],[4],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net				[4],[5]
Transfers In or Out of Level 3, Net			1,244	[2],[3],[4],[5]
Ending Fair Value			1,022	[4],[5]
GLB Embedded Derivative Reserves [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value			1,244	[5]
Items Included in Net Income				[5]
Gains (Losses) in OCI and Other				[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net				[5]
Transfers In or Out of Level 3, Net			(1,244)	[2],[3],[5]
Ending Fair Value				[5]
GLB Embedded Derivative Reserves [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(174)	[5]	(27)	[5]
Items Included in Net Income	(378)	[5]	(16)	[5]
Gains (Losses) in OCI and Other		[1],[5]		[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net		[5]		[5]
Transfers In or Out of Level 3, Net		[2],[5]		[2],[3],[5]
Ending Fair Value	(552)	[5]	(43)	[5]
Reinsurance Recoverable [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	154	[4],[5]
Items Included in Net Income	50	[4],[5]
Gains (Losses) in OCI and Other		[1],[4],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net		[4],[5]
Transfers In or Out of Level 3, Net		[2],[4],[5]
Ending Fair Value	204	[4],[5]
Indexed Annuity and IUL Contracts [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(1,170)	[5]	(1,048)	[5]
Items Included in Net Income	(38)	[5]	(49)	[5]
Gains (Losses) in OCI and Other		[1],[5]		[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	28	[5]	7	[5]
Transfers In or Out of Level 3, Net		[2],[5]		[2],[3],[5]
Ending Fair Value	(1,180)	[5]	(1,090)	[5]
VIE's Liabilities - Derivative Instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(13)	[6]	(27)	[6]
Items Included in Net Income	8	[6]	5	[6]
Gains (Losses) in OCI and Other		[1],[6]		[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net		[6]		[6]
Transfers In or Out of Level 3, Net		[2],[6]		[2],[3],[6]
Ending Fair Value	(5)	[6]	(22)	[6]
Credit Default Swaps [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(3)	[7]	(2)	[7]
Items Included in Net Income		[7]		[7]
Gains (Losses) in OCI and Other		[1],[7]		[1],[7]
Issuances, Sales, Maturities, Settlements, Calls, Net		[7]		[7]
Transfers In or Out of Level 3, Net		[2],[7]		[2],[3],[7]
Ending Fair Value	$ (3)	[7]	$ (2)	[7]

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

[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 the prior period.

[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).