Guaranteed Benefit Features (Information On Guaranteed Death Benefit Features) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Return of Net Deposits [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total Account Value	$ 80,976		$ 79,391
Net Amount At Risk By Product and Guarantee Sep Acct Value	134	[1]	141	[1]
Average attained age of contract holders	61 years		61 years
Minimum Return [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total Account Value	147		151
Net Amount At Risk By Product and Guarantee Sep Acct Value	27	[1]	27	[1]
Average attained age of contract holders	73 years		73 years
Guaranteed minimum return	5.00%		5.00%
Anniversary Contract Value [Member]
Net Amount at Risk by Product and Guarantee [Line Items]
Total Account Value	25,905		25,958
Net Amount At Risk By Product and Guarantee Sep Acct Value	$ 557	[1]	$ 570	[1]
Average attained age of contract holders	68 years		68 years

[1] Represents the amount of death benefit in excess of the account balance.  There were no material changes in net amounts at risk when comparing March 31, 2014, to December 31, 2013, as equity markets remained flat during the first three months of 2014.