Retirement Plans - Weighted Average Assumptions Used in Calculating Benefit Obligation (Details)	Dec. 31, 2013	Dec. 31, 2012
United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	4.50%	3.50%
Rate of compensation increase	0.00%	0.00%
International
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	3.20%	3.33%
Rate of compensation increase	2.89%	3.02%