Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurement - Additional Information (Details)

v3.10.0.1
Fair Value Measurement - Additional Information (Details) - USD ($)
$ in Millions
May 31, 2018
Aug. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Foreign Currency Contracts, Asset (Liability), Fair Value Disclosure $ 0.2 $ 0.2
Senior Notes | 5.625% Senior Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of long-term debt $ 291.5 $ 295.8