XML 92 R78.htm IDEA: XBRL DOCUMENT v3.6.0.2
Financing Arrangements - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Oct. 31, 2016
Oct. 31, 2015
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2011
Line of Credit Facility [Line Items]            
Borrowings under the revolving credit facility     $ 200,000,000 $ 220,000,000    
Payments under financing arrangements   $ 220,000,000 220,000,000 $ 210,000,000 $ 200,000,000  
Outstanding letters of credit and bank guarantees     $ 62,856,000      
Revolving Credit Facility [Member]            
Line of Credit Facility [Line Items]            
Five-year revolving credit facility           $ 500,000,000
Revolving credit facility, maturity term     5 years      
Subsequent Event [Member]            
Line of Credit Facility [Line Items]            
Payments under financing arrangements $ 200,000,000