Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

v3.7.0.1
Shareholders' Equity - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Class of Stock [Line Items]    
Cash dividends paid on common stock $ 26.0 $ 25.4
Treasury Stock, Shares, Acquired 468,000  
Amount of shares repurchased $ 17.0 $ 4.0
Common stock, shares issued 687,000  
Treasury Stock    
Class of Stock [Line Items]    
Common stock, shares issued 597,000