Intangible Assets, Other Assets, Net and Goodwill Deferred Financing Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amortization of deferred financing costs to interest expense	$ 10.2	$ 7.0	$ 2.5
Write off of deferred financing fees	$ 0.5	$ 3.2	$ 0.5