Annual report pursuant to Section 13 and 15(d)

Capital Stock - Additional Information (Detail)

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Capital Stock - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 36 Months Ended
Oct. 01, 2014
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Oct. 01, 2014
Mar. 19, 2014
Sep. 28, 2011
Capital Unit [Line Items]              
Cumulative Preferred Stock, shares authorized share   160,000          
Cumulative Preferred Stock, par value   $ 1.00          
Cumulative Preferred Stock, issued   0          
Shares authorized in buyback program           7,000,000 7,000,000
Shares repurchased   12,195,359 3,983,513        
Treasury Stock Repurchased During the Fiscal Year, Shares   8,211,846 1,324,762 2,658,751      
Treasury Stock Acquired, Average Cost Per Share $ 33 $ 35 $ 32 $ 24 $ 32    
Treasury Stock, Value   $ 388,627 $ 104,915        
Anti-dilutive securities-equity based compensation plans (excluded from earnings per share calculation)   522,000 619,000 2,582,000      
Common Class A
              
Capital Unit [Line Items]              
Common stock, shares authorized   168,000,000 168,000,000        
Common stock, par value   $ 0.20 $ 0.20        
Common stock, shares issued   78,480,780 77,001,144        
Common stock, shares outstanding   66,285,421          
Common Class B
              
Capital Unit [Line Items]              
Common stock, shares authorized   1,500,000          
Common stock, par value   $ 0.20          
Common stock, shares issued   0          
Common stock, shares outstanding     0        
Subsequent Event [Member]
              
Capital Unit [Line Items]              
Shares authorized in buyback program 7,000,000       7,000,000    
Shares repurchased 14,000,000       14,000,000    
Treasury Stock Repurchased During the Fiscal Year, Shares 1,804,641            
Treasury Stock, Value $ 447,100       $ 447,100