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Fair Value Measurements, Derivative Instruments and Hedging Activities - Fuel Derivatives Outstanding (Details) bbl in Thousands, $ in Millions | 3 Months Ended
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Feb. 28, 2017 USD ($) bbl $ / bbl | Feb. 29, 2016 USD ($)
Derivative [Line Items] |  |
Gains (losses) on fuel derivatives, net | $ | $ 27 | $ (236)
Fuel |  |
Derivative [Line Items] |  |
Unrealized gains (losses) on fuel derivatives, net | $ | 72 | (145)
Realized losses on fuel derivatives, net | $ | (45) | (91)
Gains (losses) on fuel derivatives, net | $ | $ 27 | $ (236)
Fuel Derivatives 2017 Maturity February 2013 Transaction |  |
Derivative [Line Items] |  |
Barrels | bbl | 2,457 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 115 |
Fuel Derivatives 2017 Maturity April 2013 Transaction |  |
Derivative [Line Items] |  |
Barrels | bbl | 1,521 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 110 |
Fuel Derivatives 2017 Maturity Date January Twenty Fourteen Transaction [Member] |  |
Derivative [Line Items] |  |
Barrels | bbl | 1,350 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 114 |
Fuel Derivatives 2017 Maturity October 2014 Transaction |  |
Derivative [Line Items] |  |
Barrels | bbl | 765 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 113 |
Fuel Derivatives 2017 Maturity |  |
Derivative [Line Items] |  |
Barrels | bbl | 6,093 |
Fuel Derivatives 2018 Maturity January 2014 Transaction |  |
Derivative [Line Items] |  |
Barrels | bbl | 2,700 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 110 |
Fuel Derivatives 2018 Maturity October 2014 Transaction |  |
Derivative [Line Items] |  |
Barrels | bbl | 3,000 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 114 |
Fuel Derivatives 2018 Maturity |  |
Derivative [Line Items] |  |
Barrels | bbl | 5,700 |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying 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 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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