Intangible Assets, Other Assets, Net and Goodwill Deferred Financing Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capitalized financing costs	$ 38.8	$ 4.7
Amortization of deferred financing costs to interest expense	6.1	1.9	1.6
Write off of deferred financing fees	$ 3.2	$ 0.5