Litigation, Commitments and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2011	Jun. 30, 2013	Dec. 31, 2013	Nov. 19, 2013	Dec. 31, 2014	Dec. 31, 2013	May 22, 2013 Patent Entity
ECJ Copyright Levy
Loss Contingencies [Line Items]
Copyright levies payment	$ 100
Accrued copyright levies	9.3			10.0		9.3	10.0
Cost of Sales | ECJ Copyright Levy
Loss Contingencies [Line Items]
Copyright levies accrual reversal		7.8
Italy Copyright Levy
Loss Contingencies [Line Items]
Accrued copyright levies			13.6	19.6			19.6
Amount of copyright levy overpaid	19.4		39.0	39.0
Amount of remaining copyright levy overpaid other than copyright levy liabilities			25.4
Italy Copyright Levy | Cost of Sales
Loss Contingencies [Line Items]
Copyright levies accrual reversal	3.4			2.6
France Copyright Levy
Loss Contingencies [Line Items]
Accrued copyright levies	12.1			9.5		12.1	9.5
Amount of copyright levy overpaid	43.0				55.1	55.1
Amount of remaining copyright levy overpaid other than copyright levy liabilities							45.6
France Copyright Levy | Cost of Sales
Loss Contingencies [Line Items]
Copyright levies accrual reversal	2.6
Other EU Jurisdictions
Loss Contingencies [Line Items]
Accrued copyright levies	8.3					8.3
Pending Litigation | France Copyright Levy
Loss Contingencies [Line Items]
Disputed amount of levy payments withheld				3.6			3.6
Pending Litigation | One-Blue LLC and Members
Loss Contingencies [Line Items]
Number of plaintiffs								5
Number of patents allegedly infringed								6
Other Liabilities
Loss Contingencies [Line Items]
Environmental-related accruals	$ 0.2					$ 0.2