Derivative Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 9	$ 5
Derivative Liabilities	2	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	7	3
Derivative Liabilities	2	0
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	2	2
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	2	2
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	5	2
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Cash Flow Hedging [Member] | 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 liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	2	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	2	1
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member] | Accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 0	$ 0