Debt (Schedule of Weighted Average Interest Rates) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Short-term debt	3.00%	2.70%	1.90%
Revolving credit facilities	4.40%	4.40%	3.60%