Stock Transactions Stock Transactions (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired	262,800	818,515	1,449,293
Treasury Stock, Value, Acquired, Cost Method	$ 20.9	$ 64.1	$ 112.6
Stock Repurchase Program, Authorized Amount	300.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 102.3