Derivative Instruments and Hedging Activities (Fair Value Of Derivatives Not Designated As Hedging Instruments) (Details) (Not Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Not Designated As Hedging Instrument [Member]
Derivative [Line Items]
FX Contracts Assets	$ 118	$ 170
Interest Contracts Assets	1	1
Commodity Contracts Assets	850	1,209
Total fair value of derivative assets not designated as hedging instruments	969	1,380
FX Contracts Liabilities	166	215
Commodity Contracts Liabilities	649	839
Total fair value of derivative liabilities not designated as hedging instruments.	$ 815	$ 1,054