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Derivative Financial Instruments - Additional Information (Detail) - USD ($)
$ in Millions
Nov. 30, 2016
Nov. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Fair value of derivative instruments in a liability position $ 70.6 $ 114.5
Collateral posted for derivative instruments in a liability position 44.4 97.2
Additional collateral required for derivative instruments in a liability position $ 26.1 $ 19.7