Litigation, Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	135 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Tax levy liabilities	$ 29.1	$ 27.7
ECJ Copyright Levy
Loss Contingencies [Line Items]
Copyright Levy Payment	100
Tax levy liabilities	$ 29.1	$ 27.7