Equity Narratives (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jul. 30, 2015
Equity, Class of Treasury Stock [Line Items]
Dividends declared per share		$ 0.10	$ 0.08	$ 0.20	$ 0.16
Dividends, Common Stock, Cash				$ 20.3
Treasury Stock, Shares, Acquired		5,863,395			0
Treasury Stock, Value, Acquired, Par Value Method				$ 151.8
Treasury Stock Acquired, Average Cost Per Share				$ 25.89
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 88.4		$ 88.4
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	1,439,950
Treasury Stock, Value, Acquired, Par Value Method	$ 42.3
Treasury Stock Acquired, Average Cost Per Share	$ 29.39
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 46.1