v2.4.0.8

Derivative and Hedging Activities - Derivative Instruments in Balance Sheet Table (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value Gross | $ (797) | $ (649)
Short-term derivative assets | 1 | 0
Long-term derivative assets | 7 | 4
Derivative Liability, Current | (417) | (208)
Long-term derivative liabilities | (389) | (445)
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value Gross | (755) | (553)
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value Gross | (48) | (98)
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value Gross | 6 | 2
Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 56 | 29
Other Noncurrent Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 3 | 11
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liability, gross liability | (469) | (231)
Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liability, gross liability | (1) | (6)
Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liability, gross liability | (345) | (362)
Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liability, gross liability | (47) | (92)
Other Noncurrent Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 6 | 2
Netting [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Netting [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 |
Netting [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Netting [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Netting [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 55 | 29
Netting [Member] | Other Noncurrent Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 3 | 9
Netting [Member] | Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | (55) | (29)
Netting [Member] | Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Netting [Member] | Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | (3) | (9)
Netting [Member] | Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Netting [Member] | Other Noncurrent Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0
Estimate of Fair Value Measurement [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | (797) | (649)
Estimate of Fair Value Measurement [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | (755) | (553)
Estimate of Fair Value Measurement [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | (48) | (98)
Estimate of Fair Value Measurement [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets (Liabilities), at Fair Value, Net | 6 | 2
Estimate of Fair Value Measurement [Member] | Other Current Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Short-term derivative assets | 1 | 0
Estimate of Fair Value Measurement [Member] | Other Noncurrent Assets [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Long-term derivative assets | 0 | 2
Estimate of Fair Value Measurement [Member] | Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Current | (414) | (202)
Estimate of Fair Value Measurement [Member] | Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liability, Current | (1) | (6)
Estimate of Fair Value Measurement [Member] | Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Long-term derivative liabilities | (342) | (353)
Estimate of Fair Value Measurement [Member] | Other Noncurrent Liabilities [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Long-term derivative liabilities | (47) | (92)
Estimate of Fair Value Measurement [Member] | Other Noncurrent Liabilities [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Long-term derivative assets | $ 6 | $ 2

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