Legal Matters and Contingencies (Details)	3 Months Ended
	Mar. 31, 2014 sites
Legal Matters and Contingencies
Number of former public waste disposal sites	5
Oil-for-Food Program [Member]
Legal Matters and Contingencies
Number of French companies for investigation	170
Number of our French companies for investigation	1
Number of participants in U.N Oil-for-Food Program	93
Number of foreign subsidiaries	2