Investments (Schedule of Details Of The Amount Of Credit Losses Of OTTI Recognized In Net Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	$ 850	$ 976
Gross Unrealized Gains	40	27
Gross Unrealized Losses and OTTI	79	154
Fair Value	811	849
OTTI in Credit Losses	404	424	390	319
Corporate bonds [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	265	299
Gross Unrealized Gains	18	4
Gross Unrealized Losses and OTTI	49	98
Fair Value	234	205
OTTI in Credit Losses	133	104
RMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	550	636
Gross Unrealized Gains	18	22
Gross Unrealized Losses and OTTI	18	40
Fair Value	550	618
OTTI in Credit Losses	184	227
CMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	35	41
Gross Unrealized Gains	4	1
Gross Unrealized Losses and OTTI	12	16
Fair Value	27	26
OTTI in Credit Losses	$ 87	$ 93