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Derivatives - Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Gross and net fair values of outstanding derivatives (in millions) |  |
Collateral received netted against derivative assets | $ 0 | $ 14
Collateral paid netted against derivative liabilities | 22 | 4
Collateral deposited with clearinghouses and brokers | 32 | 3
Commodity contracts |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative asset, gross | 184 | 644
Less: counterparty netting and cash collateral, asset | (149) | (535)
Total net fair value, asset | 35 | 109
Commodity contract derivative liability, gross | 460 | 948
Less: counterparty netting and cash collateral, liability | (171) | (525)
Total net fair value, liability | 289 | 423
Cash-flow hedges | Commodity contracts | Other current assets |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative asset, gross |  | 9
Cash-flow hedges | Commodity contracts | Accrued liabilities |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative liability, gross | 3 | 1
Not designated as hedging instruments | Commodity contracts |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative asset, gross | 184 | 635
Commodity contract derivative liability, gross | 457 | 947
Not designated as hedging instruments | Commodity contracts | Other current assets |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative asset, gross | 171 | 626
Not designated as hedging instruments | Commodity contracts | Long-term receivables and other assets, net |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative asset, gross | 13 | 9
Not designated as hedging instruments | Commodity contracts | Accrued liabilities |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative liability, gross | 242 | 672
Not designated as hedging instruments | Commodity contracts | Deferred credits and other liabilities |  |
Gross and net fair values of outstanding derivatives (in millions) |  |
Commodity contract derivative liability, gross | $ 215 | $ 275

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- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, and obligation to return cash collateral under master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226003-175313 + Details
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