Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
United States Employees, Defined Contribution [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined contribution benefit plans	$ 4.1	$ 3.5	$ 3.5
International Employees, Defined Contribution [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined contribution benefit plans	$ 0.2	$ 0.1	$ 0.3