COMMITMENTS AND CONTINGENCIES Narrative (Details) (NuStar Energy (Grace Energy Corporation Matter) [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
NuStar Energy (Grace Energy Corporation Matter) [Member]
NuStar Energy's Commitments and Contingencies [Abstract]
Court Judgment, Remediation Costs Not Recoverable By Plaintiff	$ 3.5
Court Judgment, Attorney Costs Awarded to Plaintiff	1.8
Department of Justice Estimated Remediation Expenses	71.9
Loss Contingencies, Estimated Settlement Payment	$ 11.7