Investments (Changes In The Valuation Allowance Of Impaired Mortgage Loans On Real Estate (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Losses
Balance as of beginning-of-year	$ 3	$ 21	$ 31
Additions		3	14
Charge-offs, net of recoveries		(21)	(24)
Balance as of end-of-year	$ 3	$ 3	$ 21