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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]
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||
| 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]
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||
| 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]
|
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| Derivatives, Fair Value [Line Items] | ||
| Long-term derivative assets | $ 6 | $ 2 |