Derivative Instruments and Hedging Activities (Fair Value Of Derivatives Designated As Hedging Instruments) (Details) (Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity Contracts Assets	$ 0	$ 1
Commodity Contracts Liabilities	0	0
Interest Rate Derivative Assets, at Fair Value	0	0
Interest Rate Derivative Liabilities, at Fair Value	9	0
Derivative Instruments in Hedges, Assets, at Fair Value	0	1
Derivative Instruments in Hedges, Liabilities, at Fair Value	$ 9	$ 0