Investments (Schedule Of Impaired Mortgage Loans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012 item	Dec. 31, 2011
Information about impaired mortgage loans on real estate
Number of impaired mortgage loans on real estate	3	10
Principal balance of impaired mortgage loans on real estate	$ 27	$ 75
Valuation allowance associated with impaired mortgage loans on real estate	(3)	(21)	(31)
Carrying value of impaired mortgage loans on real estate	24	54
Average carrying value for impaired loans on real estate	34	51	57
Interest income recognized on impaired mortgage loans on real estate	2	1	2
Interest income collected on impaired mortgage loans on real estate	$ 2	$ 1	$ 2