Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		$ 91,478
Interest Rate Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[1]	66,386
Foreign Currency Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[2]	785
Equity Market Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		24,204
Credit Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		103
Total Derivative Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		91,478	$ 83,976
Asset Fair Value		2,383	2,587
Liability Fair Value		2,231	2,301
Derivative investments [Member] | Interest Rate Contract [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	61,902	54,401
Asset Fair Value	[3]	714	989
Liability Fair Value	[3]	393	342
Derivative investments [Member] | Foreign Currency Contract [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	143	68
Derivative investments [Member] | Equity Market Contract [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	24,204	24,310
Asset Fair Value	[3]	799	886
Liability Fair Value	[3]	235	243
Derivative investments [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		3,592	4,196
Asset Fair Value		399	453
Liability Fair Value		54	219
Derivative investments [Member] | Cash Flow Hedges [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	2,950	3,554
Asset Fair Value	[3]	337	408
Liability Fair Value	[3]	38	198
Derivative investments [Member] | Cash Flow Hedges [Member] | Foreign Currency Contract [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	642	642
Asset Fair Value	[3]	62	45
Liability Fair Value	[3]	16	21
Derivative investments [Member] | Fair Value Hedges [Member] | Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	1,534	875
Asset Fair Value	[3]	217	259
Liability Fair Value	[3]	170
Other Liabilities [Member] | Credit Contract [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[4]	103	126
Liability Fair Value	[4]	2	3
Other Liabilities [Member] | GLB Embedded Derivative Reserves [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	[4]	102	174
Other Assets [Member] | GLB Embedded Derivative Reserves [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	[5]	254
Reinsurance Related Embedded Derivatives [Member] | Reinsurance Related [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	[6]	120	150
Future contract benefits [Member] | Indexed Annuity and IUL Contracts [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	[7]	$ 1,155	$ 1,170

[1] As of June 30, 2015, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2067.

[2] As of June 30, 2015, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was December 2029.

[3] Reported in derivative investments and other liabilities on our Consolidated Balance Sheets.

[4] Reported in other liabilities on our Consolidated Balance Sheets.

[5] Reported in other assets on our Consolidated Balance Sheets.

[6] Reported in reinsurance related embedded derivatives on our Consolidated Balance Sheets.

[7] Reported in future contract benefits on our Consolidated Balance Sheets.