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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 4 Months Ended 12 Months Ended
Nov. 30, 2019
Dec. 18, 2018
Dec. 05, 2018
Nov. 15, 2018
Sep. 30, 2018
Jul. 08, 2018
Apr. 15, 2018
Jan. 21, 2018
Sep. 30, 2018
Oct. 01, 2017
Oct. 02, 2016
Subsequent Event [Line Items]                      
Common Stock, Dividends, Per Share, Declared         $ 0 $ 0.40 $ 0.40 $ 0.40 $ 1.60 $ 1.60 $ 1.20
Subsequent Event [Member]                      
Subsequent Event [Line Items]                      
Dividends Payable, Date Declared       Nov. 15, 2018              
Common Stock, Dividends, Per Share, Declared       $ 0.40              
Dividends Payable, Date to be Paid   Dec. 18, 2018                  
Dividends Payable, Date of Record     Dec. 05, 2018                
Stock Repurchase Program, Authorized Amount       $ 60.0              
Stock Repurchase Program Expiration Date Nov. 30, 2019