Investments (Schedule of Details Of The Amount Of Credit Losses Of OTTI Recognized In Net Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	$ 822		$ 850
Gross Unrealized Gains	57		40
Gross Unrealized Losses and OTTI	66		79
Fair Value	813		811
OTTI in Credit Losses	389	408	404	413	437	424
Corporate Bonds [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	271		265
Gross Unrealized Gains	27		18
Gross Unrealized Losses and OTTI	41		49
Fair Value	257		234
OTTI in Credit Losses	124		133
RMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	500		550
Gross Unrealized Gains	26		18
Gross Unrealized Losses and OTTI	12		18
Fair Value	514		550
OTTI in Credit Losses	185		184
CMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	51		35
Gross Unrealized Gains	4		4
Gross Unrealized Losses and OTTI	13		12
Fair Value	42		27
OTTI in Credit Losses	$ 80		$ 87