Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 3	$ 3
Derivative Liabilities	3	2
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	3	2
Derivative Liabilities	3	2
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	1
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	1
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	1	1
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	1	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	2	2
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	1	1
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 1	$ 0