Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

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Shareholders' Equity - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Class of Stock [Line Items]    
Cash dividends paid on common stock $ 38.3 $ 37.8
Shares repurchased 557,000  
Amount of shares repurchased $ 16.6 $ 9.2
Common stock, shares issued 576,000  
Treasury Stock    
Class of Stock [Line Items]    
Common stock, shares issued 680,000