Derivative Financial Instruments and Risk Management (Details 6) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Offsetting Assets and Liabilities [Abstract]
Gross Amount of Recognized Assets	$ 104	$ 101
Gross Amounts Offset	0	0
Net Amount of Assets	104	101
Gross Amounts Not Offset	(7)	(8)
Net Amount	97	93
Gross Amount of Recognized Liabilities	(9)	(23)
Gross Amounts Offset	0	0
Net Amount of Liabilities	(9)	(23)
Gross Amounts Not Offset	7	8
Net Amount	$ (2)	$ (15)