COMMITMENTS AND CONTINGENCIES Narrative (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2011	Sep. 30, 2011
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
NuStar Energy (Eres Matter) [Member]
NuStar Energy's Commitments and Contingencies [Abstract]
Loss Contingency, Allegations		78.1
Loss Contingencies Settlement Amount	$ 33.5