Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 79,660
Interest Rate Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	58,414	[1]
Foreign Currency Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	641	[2]
Equity Market Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	20,479
Credit Risk Contract [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	126
Total Derivative Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	79,660		71,594
Asset Fair Value	2,946		3,102
Liability Fair Value	2,266		2,322
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	53,270	[3]	45,620	[3]
Asset Fair Value	367	[3]	215	[3]
Liability Fair Value	560	[3]	744	[3]
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	51	[3]	102	[3]
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	20,479	[3]	19,917	[3]
Asset Fair Value	860	[3]	957	[3]
Liability Fair Value	239	[3]	193	[3]
Derivative investments [Member] | Cash Flow Hedges [Member] | Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,859		4,954
Asset Fair Value	568		594
Liability Fair Value	188		194
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	4,269	[3]	4,339	[3]
Asset Fair Value	534	[3]	562	[3]
Liability Fair Value	138	[3]	148	[3]
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	590	[3]	615	[3]
Asset Fair Value	34	[3]	32	[3]
Liability Fair Value	50	[3]	46	[3]
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	875	[3]	875	[3]
Asset Fair Value	129	[3]	92	[3]
Liability Fair Value	9	[3]	33	[3]
Other Liabilities [Member] | Credit Risk Contract [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	126	[4]	126	[4]
Liability Fair Value	2	[4]	2	[4]
Other Assets [Member] | GLB reserves embedded derivatives [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	1,022	[5]	1,244	[5]
Future contract benefits [Member] | GLB reserves embedded derivatives [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	43	[4]
Future contract benefits [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	135	[6]	108	[6]
Future contract benefits [Member] | Indexed annuity and universal life contracts embedded derivatives [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	$ 1,090	[7]	$ 1,048	[7]

[1] As of March 31, 2014, 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 March 31, 2014, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was April 2028.

[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.