Equity Narratives (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Oct. 30, 2014
Equity [Abstract]
Dividends declared per share		$ 0.09	$ 0.07	$ 0.25	$ 0.20
Dividends, Common Stock, Cash				$ 19.0
Treasury Stock, Shares, Acquired	1,725,875	6,280,649		0	0
Treasury Stock, Value, Acquired, Par Value Method	36.3			129.1
Treasury Stock Acquired, Average Cost Per Share	$ 21.06			$ 20.56
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 61.0		$ 61.0		$ 24.7