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Fair Value Of Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Feb. 28, 2014
Aug. 31, 2013
Fair Value Of Financial Instruments [Abstract]    
Cash equivalents carried at cost $ 31.8 $ 39.1
Fixed Rate Notes, fair value 442.7 447.6
Fixed rate notes, carrying value, including accrued interest $ 442.7 $ 447.6