Stock Transactions Stock Transactions (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014 January 2013 Share Repurchase Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	818,515		1,449,293
Treasury Stock, Value, Acquired, Cost Method	$ 64.1		$ 112.6
Stock Repurchase Program, Authorized Amount		300.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 123.3