Short-term Debt and Credit Lines (Revolving Loan Facility and Credit Lines) (Details) In Millions, unless otherwise specified		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2013 Line of Credit USD ($)	Dec. 31, 2012 Line of Credit	May 23, 2012 Line of Credit USD ($)	May 22, 2012 Line of Credit USD ($)	Dec. 31, 2013 Revolving Credit Facility Euro-Based Revolving Loan Facility USD ($)	Dec. 31, 2013 Revolving Credit Facility Euro-Based Revolving Loan Facility EUR (€)	Dec. 31, 2012 Revolving Credit Facility Euro-Based Revolving Loan Facility USD ($)	Dec. 31, 2012 Revolving Credit Facility Euro-Based Revolving Loan Facility EUR (€)
Line of Credit Facility
Revolving loan facility						$ 4.8		$ 3.3
Maximum borrowing capacity		47.8		125.0	90.0	5.5	4.0	5.3	4.0
Interest rate (as a Percentage)			1.25%			1.72%	1.72%	1.56%	1.56%
Current borrowing capacity	43.1
Line of credit period (in years)		3 years
Expected decrease in line of credit facility		16.7
Purchase of company shares	30.0
Maximum amount issuable	$ 70.0