Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

v3.19.2
Shareholders' Equity - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Class of Stock [Line Items]        
Cash dividends paid on common stock     $ 39.4 $ 39.1
Treasury Stock, Value, Acquired, Cost Method   $ 21.7   60.6
Amount of shares repurchased     $ 0.0 $ 60.6
Treasury Stock        
Class of Stock [Line Items]        
Treasury Stock, Shares, Acquired   0.5   1.4
Treasury Stock, Value, Acquired, Cost Method   $ 21.7   $ 60.6
Common stock, shares issued 0.0 0.1 0.3 0.5