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Accounting for Derivative Instruments and Hedging Activities (Details) (USD $)
In Millions, unless otherwise specified
Nov. 30, 2011
Foreign currency [Member]
 
Derivative Instrument  
Foreign currency derivatives $ 1,268.9
Commodity [Member]
 
Derivative Instrument  
Natural gas derivatives (MMbtu) 23,200,000
Freight Contracts [Member]
 
Derivative Instrument  
Ocean freight contracts (Tonnes) 2,500,000