Derivatives (Earned Income On Derivatives) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	$ 274	$ 17
Derivatives Designated as Hedging Instruments [Member] | Net Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	33	36
Derivatives Designated as Hedging Instruments [Member] | Interest Credited to Policyholder Account Balance [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	32	35
Derivatives Designated as Hedging Instruments [Member] | Other Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	(1)	(3)
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Net Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	(1)	(1)
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Net Derivative Gains (Losses) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	219	15
Derivatives Not Designated or Not Qualifying as Hedging Instruments [Member] | Policyholder Benefits and Claims [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total earned income	$ (8)	$ (65)