Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Narrative (Details)

v3.10.0.1
Shareholders' Equity - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Class of Stock [Line Items]    
Cash dividends paid on common stock $ 13.1 $ 13.1
Treasury Stock, Value, Acquired, Cost Method 0.0 15.2
Amount of shares repurchased $ 0.0 $ 15.2
Treasury Stock    
Class of Stock [Line Items]    
Treasury Stock, Shares, Acquired 0.0 0.4
Treasury Stock, Value, Acquired, Cost Method $ 0.0 $ 15.2
Common stock, shares issued 0.2 0.3