Summary of Significant Accounting Policies (Leases) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]  
Lease exit costs $ 6.5
Cost of Sales [Member]  
Restructuring Cost and Reserve [Line Items]  
Lease exit costs 2.9
Selling and Marketing Expense [Member]  
Restructuring Cost and Reserve [Line Items]  
Lease exit costs 2.8
General and Administrative  
Restructuring Cost and Reserve [Line Items]  
Lease exit costs $ 0.8