Annual report pursuant to Section 13 and 15(d)

Leases - Additional Information (Detail)

v3.3.0.814
Leases - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Leases Disclosure [Line Items]      
Due in 2016 $ 29.5    
Due in 2017 24.9    
Due in 2018 20.9    
Due in 2019 17.8    
Due in 2020 15.1    
Due thereafter 31.5    
Operating lease, rental expense $ 35.7 $ 31.6 $ 26.0
Minimum      
Leases Disclosure [Line Items]      
Lease agreements period 1 year    
Maximum      
Leases Disclosure [Line Items]      
Lease agreements period 20 years    
Viking      
Leases Disclosure [Line Items]      
Sale Leaseback Transaction, Lease Terms   seven year term  
Sale Leaseback Transaction, Gross Proceeds, Investing Activities   $ 41.0