Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

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Shareholders' Equity - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Class of Stock [Line Items]      
Cash dividends paid on common stock   $ 37.8 $ 37.2
Shares repurchased   305,000  
Amount of shares repurchased   $ 9.2 $ 16.5
Common stock, shares issued 254,000    
Treasury Stock      
Class of Stock [Line Items]      
Common stock, shares issued 327,000