Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
12 Months Ended 3 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Aug. 31, 2011
Aug. 31, 2013
properly state deferred income tax balances associated with its equity compensation programs
Quantifying Misstatement in Current Year Financial Statements [Line Items]        
Prior period reclassification adjustment       $ 10,600,000
Foreign loss carryforwards expiring at various dates between 2013 and 2021 12,900,000      
Recognized interest and penalties related to unrecognized tax benefits 2,900,000 4,500,000 5,100,000  
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 4,300,000      
Undistributed earnings 427,100,000      
Additional provision for undistributed earnings 79,800,000      
Debt refinancing costs 0 16,830,000 0  
Income taxes, net of refunds $ 42,100,000 $ 56,500,000 $ 23,100,000