Derivatives (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Estimated Fair Value Assets	$ 8,595	$ 13,777
Estimated Fair Value Liabilities	6,521	5,536
Maximum Amount of Future Payments under Credit Default Swaps	9,055	8,879
Estimated Fair Value of Credit Default Swaps	165	74
Derivative Instruments, Gain (Loss) [Line Items]
Embedded derivatives	5,104	1,239	(1,284)
Derivative Instrument Detail [Abstract]
Net amounts reclassified into net derivatives gains (losses) on discontinued cash flow hedges	(1)	1	(13)
Hedging exposure to variability in future cash flows for specific length of time	7 years	8 years
Accumulated Other Comprehensive Income Loss	375	1,300
Deferred net gains (losses) expected to be reclassified to earnings	(23)
Amount and Location of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) (Effective Portion)	0	0	71
Immateriality of cash flow effectiveness	no
Cumulative foreign currency translation gain (loss) recorded in accumulated other comprehensive income (loss) for net investment in foreign operations hedges	233	(98)
Potential future recoveries available to offset maximum amount of future payments under credit default swaps	90	150
Excess securities collateral received on derivatives	104	0
Excess securities collateral provided on derivatives	236	290
Change in fair value of derivatives excluded from the assessment of hedge effectiveness	(2)	(4)	(3)
Securities collateral received which the company is permitted to sell or repledge, amount that has been sold or repledged	0
Over the Counter [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Excess securities collateral received on derivatives	238	161
Excess securities collateral provided on derivatives	66	0
Exchange Traded [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Excess securities collateral received on derivatives	141	0
Excess securities collateral provided on derivatives	81	40
Nonperformance Risk [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Embedded derivatives	(952)	(1,700)	1,800
Hedge Funds [Member]
Derivatives, Fair Value [Line Items]
Maximum Amount of Future Payments under Credit Default Swaps	10
Estimated Fair Value of Credit Default Swaps	0
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value Assets	255	290
Estimated Fair Value Liabilities	$ 28	$ 114