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Derivatives And Hedging Activities Fair Value of Derivative Instruments (Details) (USD $)
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Sep. 30, 2014
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Dec. 31, 2013
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative, Fair Value, Net | $ (3,000,000) | $ (2,000,000) | ||||
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Designated as Hedging Instrument [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 7,000,000 | 29,000,000 | ||||
| Derivative liability, fair value, gross liability | 29,000,000 | 31,000,000 | ||||
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Not Designated as Hedging Instrument [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 20,000,000 | 3,000,000 | ||||
| Derivative liability, fair value, gross liability | 1,000,000 | 3,000,000 | ||||
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Commodity derivatives [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 1,000,000 | 2,000,000 | ||||
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Commodity derivatives [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative liability, fair value, gross liability | 11,000,000 | 9,000,000 | ||||
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Commodity derivatives [Member] | Designated as Hedging Instrument [Member] | Other Long-Term Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 0 | 1,000,000 | ||||
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Commodity derivatives [Member] | Designated as Hedging Instrument [Member] | Other Long-Term Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative liability, fair value, gross liability | 3,000,000 | 2,000,000 | ||||
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Foreign currency derivatives [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 3,000,000 | 16,000,000 | ||||
| Derivative liability, fair value, gross liability | 2,000,000 | 3,000,000 | ||||
| Derivative, Fair Value, Net | 1,000,000 | [1] | 13,000,000 | [1] | ||
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Foreign currency derivatives [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 2,000,000 | 3,000,000 | ||||
| Derivative liability, fair value, gross liability | 8,000,000 | 10,000,000 | ||||
| Derivative, Fair Value, Net | (6,000,000) | [1] | (7,000,000) | [1] | ||
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Foreign currency derivatives [Member] | Designated as Hedging Instrument [Member] | Other Long-Term Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 1,000,000 | 5,000,000 | ||||
| Derivative liability, fair value, gross liability | 0 | 1,000,000 | ||||
| Derivative, Fair Value, Net | 1,000,000 | [1] | 4,000,000 | [1] | ||
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Foreign currency derivatives [Member] | Designated as Hedging Instrument [Member] | Other Long-Term Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 0 | 2,000,000 | ||||
| Derivative liability, fair value, gross liability | 5,000,000 | 6,000,000 | ||||
| Derivative, Fair Value, Net | (5,000,000) | [1] | (4,000,000) | [1] | ||
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Foreign currency derivatives [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value, gross asset | 20,000,000 | 3,000,000 | ||||
| Derivative liability, fair value, gross liability | 0 | 3,000,000 | ||||
| Derivative, Fair Value, Net | 20,000,000 | [1] | 0 | [1] | ||
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Foreign currency derivatives [Member] | Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative, Fair Value, Net | (1,000,000) | [1] | ||||
| Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 0 | |||||
| Derivative Liability, Fair Value, Amount Not Offset Against Collateral | $ 1,000,000 | |||||
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