Certain Nontraditional Long-Duration Contracts (Guarantees Associated with Variable Annuity Contracts, by Guarantee Type) (Details) (Annuity [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Return Of Net Deposits [Member] | In Event Of Death [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Account value in the event of death	$ 113,527		$ 98,207
Net amount at risk in the event of death	465		829
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	63 years		62 years
Return Of Net Deposits [Member] | At Annuitization Accumulation [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Account value at annuitization or accumulation	181	[1]	196	[1]
Net amount at risk at annuitization or accumulation	0	[1]	33	[1]
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	62 years		62 years
Mimimum Return Or Contract Value [Member] | In Event Of Death [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Account value in the event of death	37,801		34,299
Net amount at risk in the event of death	2,817		4,209
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	66 years		65 years
Mimimum Return Or Contract Value [Member] | At Annuitization Accumulation [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Account value at annuitization or accumulation	127,530	[1]	109,845	[1]
Net amount at risk at annuitization or accumulation	$ 2,892	[1]	$ 5,072	[1]
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age	63 years		62 years
Net Amount at Risk by Product and Guarantee, Weighted Average Period Remaining	0 years 4 months		0 years 6 months

[1]          Includes income and withdrawal benefits as described herein.