Derivative Instruments and Hedging Activities (Details - Fair Value of Derivatives) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 2,176	$ 2,204
Derivative Asset	8	10
Derivative Liability	(131)	(55)
Derivative Asset (Liability), Net	(123)	(45)
Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,176	2,204
Derivative Asset	8	10
Derivative Liability	(131)	(55)
Derivative Asset (Liability), Net	$ (123)	$ (45)