Derivatives (Net Derivative Gains Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Components of Net Derivatives Gains (Losses)
Derivatives and hedging gains (losses)	$ 543	$ (1,444)	$ 1,077	$ (6,527)
Embedded derivatives	(65)	898	55	3,661
Total net derivative gains (losses)	$ 478	$ (546)	$ 1,132	$ (2,866)