Lawsuits, Claims, Commitments and Contingencies (Details) (Written settlement agreement with the State of New Jersey to resolve claims in relation to acquisition of Diamond Shamrock Chemicals Company, USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Written settlement agreement with the State of New Jersey to resolve claims in relation to acquisition of Diamond Shamrock Chemicals Company
Lawsuits, claims, commitments and contingencies
Amount to be paid if settlement is approved by the court	$ 190