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Fair Value Measurements, Derivative Instruments and Hedging Activities - Fuel Derivatives Outstanding (Details)
bbl in Thousands, $ in Millions
12 Months Ended
Nov. 30, 2016
USD ($)
bbl
$ / bbl
Nov. 30, 2015
USD ($)
Nov. 30, 2014
USD ($)
Derivative [Line Items]      
Unrealized gains (losses) on fuel derivatives, net | $ $ 236 $ (332) $ (268)
Realized losses on fuel derivatives, net | $ (283) (244) (3)
Losses on fuel derivatives, net | $ $ (47) $ (576) $ (271)
Fuel Derivatives 2017 Maturity      
Derivative [Line Items]      
Barrels | bbl 8,124    
Fuel Derivatives 2017 Maturity February 2013 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 3,276    
Weighted-Average Floor Price (in dollars per BBL) 80    
Weighted-Average Ceiling Price (in dollars per BBL) 115    
Fuel Derivatives 2017 Maturity April 2013 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 2,028    
Weighted-Average Floor Price (in dollars per BBL) 75    
Weighted-Average Ceiling Price (in dollars per BBL) 110    
Fuel Derivatives 2017 Maturity January 2014 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 1,800    
Weighted-Average Floor Price (in dollars per BBL) 75    
Weighted-Average Ceiling Price (in dollars per BBL) 114    
Fuel Derivatives 2017 Maturity October 2014 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 1,020    
Weighted-Average Floor Price (in dollars per BBL) 80    
Weighted-Average Ceiling Price (in dollars per BBL) 113    
Fuel Derivatives 2018 Maturity [Domain]      
Derivative [Line Items]      
Barrels | bbl 5,700    
Fuel Derivatives 2018 Maturity January 2014 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 2,700    
Weighted-Average Floor Price (in dollars per BBL) 75    
Weighted-Average Ceiling Price (in dollars per BBL) 110    
Fuel Derivatives 2018 Maturity October 2014 Transaction Date      
Derivative [Line Items]      
Barrels | bbl 3,000    
Weighted-Average Floor Price (in dollars per BBL) 80    
Weighted-Average Ceiling Price (in dollars per BBL) 114