Stockholders' Equity (Details Textuals) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended			6 Months Ended		33 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014
Stockholders' Equity Note [Abstract]
Payments of Ordinary Dividends, Common Stock					$ 43.5
Common Stock, Dividends, Per Share, Cash Paid		$ 0.0625	$ 0.0625	$ 0	$ 0.1250	$ 0
Treasury Stock, Shares, Acquired					12.4		60.0
Treasury Stock, Value, Acquired, Cost Method					200.4		940.0
Treasury Stock Acquired, Average Cost Per Share							$ 15.68
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 221.9