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Fair Value Measurements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Nov. 30, 2014
Aug. 31, 2014
Nov. 30, 2013
Fair Value Measurements [Abstract]      
Long-term debt outstanding $ 0us-gaap_LongTermDebt $ 0us-gaap_LongTermDebt $ 0us-gaap_LongTermDebt