Investments (Schedule Of Impaired Mortgage Loans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 item	Mar. 31, 2013	Dec. 31, 2013 item	Dec. 31, 2012
Information about impaired mortgage loans on real estate
Number of impaired mortgage loans on real estate	3		3
Principal balance of impaired mortgage loans on real estate	$ 27		$ 27
Valuation allowance associated with impaired mortgage loans on real estate	(3)		(3)	(21)
Carrying value of impaired mortgage loans on real estate	24		24
Average carrying value for impaired loans on real estate	24	46
Interest income recognized on impaired mortgage loans on real estate		1
Interest income collected on impaired mortgage loans on real estate		$ 1