v2.4.0.8

Derivative Instruments (Details 2) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative assets, current | $ 445 | $ 339
Derivative Asset, Noncurrent | 105 | 98
Total derivative assets | 550 | 437
Derivative Liability, Current | 451 | 357
Derivative Liability, Noncurrent | 243 | 293
Derivative Liability, Fair Value, Gross Liability | 694 | 650
Net derivative assets (liabilities) | (144) | (213)
Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total derivative assets | 9 | 4
Derivative Liability, Fair Value, Gross Liability | 115 | 184
Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total derivative assets | 541 | 433
Derivative Liability, Fair Value, Gross Liability | 579 | 466
Interest Rate Swap [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets, current | 0 | 0
Derivative Asset, Noncurrent | 9 | 4
Total derivative assets | 9 | 4
Derivative Liability, Current | 47 | 40
Derivative Liability, Noncurrent | 82 | 160
Derivative Liability, Fair Value, Gross Liability | 129 | 200
Net derivative assets (liabilities) | (120) | (196)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total derivative assets | 9 | 4
Derivative Liability, Fair Value, Gross Liability | 115 | 184
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total derivative assets | 0 | 0
Derivative Liability, Fair Value, Gross Liability | 14 | 16
Commodity Option [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets, current | 445 | 339
Derivative Asset, Noncurrent | 96 | 94
Total derivative assets | 541 | 433
Derivative Liability, Current | 404 | 317
Derivative Liability, Noncurrent | 161 | 133
Derivative Liability, Fair Value, Gross Liability | 565 | 450
Net derivative assets (liabilities) | (24) | (17)
Commodity Option [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Total derivative assets | 541 | 433
Derivative Liability, Fair Value, Gross Liability | $ 565 | $ 450

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