Quarterly report pursuant to Section 13 or 15(d)

Capital Stock and Share Repurchase Share Repurchase (Details)

v3.8.0.1
Capital Stock and Share Repurchase Share Repurchase (Details) - USD ($)
$ in Millions
Nov. 30, 2017
Aug. 31, 2017
Equity [Abstract]    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 7,560,566  
Treasury Stock, Shares 20,439,434 20,439,434
Stock Repurchase Program, Authorized Amount $ 617.7