Stockholders' Equity Dividends Paid (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stockholders' Equity Attributable to Parent [Abstract]
Payments of Dividends	$ 85.0	$ 6.9	$ 6.9	$ 7.1