Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		$ 98,358
Interest Rate Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[1]	70,430
Foreign Currency Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[2]	946
Equity Market Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		26,879
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		98,358	$ 83,976
Asset Fair Value		2,851	2,587
Liability Fair Value		3,358	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]	66,085	54,401
Asset Fair Value	[3]	1,295	989
Liability Fair Value	[3]	383	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]	229	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]	26,879	24,310
Asset Fair Value	[3]	941	886
Liability Fair Value	[3]	244	243
Derivative investments [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		3,533	4,196
Asset Fair Value		323	453
Liability Fair Value		64	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]	2,816	3,554
Asset Fair Value	[3]	244	408
Liability Fair Value	[3]	59	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]	717	642
Asset Fair Value	[3]	79	45
Liability Fair Value	[3]	5	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]	1,529	875
Asset Fair Value	[3]	292	259
Liability Fair Value	[3]	214
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]	7	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]	1,287	174
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	[5]	116	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	[6]	$ 1,043	$ 1,170

[1] As of September 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 September 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 reinsurance related embedded derivatives on our Consolidated Balance Sheets.

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