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Hedging Activities (Tables) | 6 Months Ended
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Jun. 30, 2017
Schedule of Gain on Derivative Instruments | The following table presents the impact of derivative instruments and their location within the Company’s unaudited statements of consolidated operations (in millions): Derivatives designated as cash flow hedges
|  | Amount of Gain Recognized in AOCI on Derivatives (Effective Portion) |  |  | Loss Reclassified from AOCI into Fuel Expense |
|  | Three Months Ended June 30, |  |  | Three Months Ended June 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Fuel contracts |  | $ | — |  |  | $ | 17 |  |  | $ | — |  |  | $ | (35) |
|  | Amount of Gain Recognized in AOCI on Derivatives (Effective Portion) |  |  | Loss Reclassified from AOCI into Fuel Expense (a) |
|  | Six Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Fuel contracts |  | $ | — |  |  | $ | 1 |  |  | $ | (2) |  |  | $ | (173) |
(a) The 2017 loss reclassified from AOCI into fuel expense represents hedge losses on December 2016 settled trades, but for which the associated fuel purchased in December was not consumed until January 2017.

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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