Investments (Schedule of Details Of The Amount Of Credit Losses Of OTTI Recognized In Net Income (Loss)) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	$ 755	$ 763
Net Unrealized Gain/(Loss) Position	12	18
Fair Value	767	781
OTTI in Credit Losses	374	380	$ 382	$ 389	$ 408	$ 404
Corporate Bonds [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	86	38
Net Unrealized Gain/(Loss) Position	(22)	(4)
Fair Value	64	34
OTTI in Credit Losses	23	20
ABS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	220	232
Net Unrealized Gain/(Loss) Position	17	9
Fair Value	237	241
OTTI in Credit Losses	111	108
RMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	409	447
Net Unrealized Gain/(Loss) Position	17	19
Fair Value	426	466
OTTI in Credit Losses	192	190
CMBS [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Amortized Cost	40	46
Net Unrealized Gain/(Loss) Position		(6)
Fair Value	40	40
OTTI in Credit Losses	$ 48	$ 62