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Fair Value Measurements, Derivative Instruments and Hedging Activities - Fuel Derivatives Outstanding (Detail) bbl in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
May 31, 2016 USD ($) bbl $ / bbl | May 31, 2015 USD ($) | May 31, 2016 USD ($) bbl $ / bbl | May 31, 2015 USD ($)
Derivative [Line Items] |  |  |  |
Gains (losses) on fuel derivatives, net | $ | $ 171 | $ (13) | $ (65) | $ (181)
Fuel |  |  |  |
Derivative [Line Items] |  |  |  |
Unrealized gains (losses) on fuel derivatives, net | $ | 242 | 34 | 96 | (78)
Realized losses on fuel derivatives | $ | $ (71) | $ (47) | $ (161) | $ (103)
Fuel Derivatives 2016 Maturity June 2012 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 1,782 |  | 1,782 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |  | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 108 |  | 108 |
Fuel Derivatives 2016 Maturity February 2013 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 1,080 |  | 1,080 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |  | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 120 |  | 120 |
Fuel Derivatives 2016 Maturity April 2013 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 1,500 |  | 1,500 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |  | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 115 |  | 115 |
Fuel Derivatives 2016 Maturity |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 4,362 |  | 4,362 |
Fuel Derivatives 2017 Maturity February 2013 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 3,276 |  | 3,276 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |  | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 115 |  | 115 |
Fuel Derivatives 2017 Maturity April 2013 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 2,028 |  | 2,028 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |  | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 110 |  | 110 |
Fuel Derivatives 2017 Maturity Date January Twenty Fourteen Transaction [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 1,800 |  | 1,800 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |  | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 114 |  | 114 |
Fuel Derivatives 2017 Maturity October 2014 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 1,020 |  | 1,020 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |  | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 113 |  | 113 |
Fuel Derivatives 2017 Maturity |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 8,124 |  | 8,124 |
Fuel Derivatives 2018 Maturity January 2014 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 2,700 |  | 2,700 |
Weighted-Average Floor Price (in dollars per barrel) | 75 |  | 75 |
Weighted-Average Ceiling Price (in dollars per barrel) | 110 |  | 110 |
Fuel Derivatives 2018 Maturity October 2014 Transaction |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 3,000 |  | 3,000 |
Weighted-Average Floor Price (in dollars per barrel) | 80 |  | 80 |
Weighted-Average Ceiling Price (in dollars per barrel) | 114 |  | 114 |
Fuel Derivatives 2018 Maturity |  |  |  |
Derivative [Line Items] |  |  |  |
Barrels | bbl | 5,700 |  | 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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