Major Customer and Concentrations of Credit Risk (Notes)	3 Months Ended
	Mar. 31, 2012
Major Customers And Concentrations Of Credit Risk [Abstract]
Major Customer and Concentrations of Credit Risk	MAJOR CUSTOMER AND CONCENTRATIONS OF CREDIT RISK TRMC, a wholly owned subsidiary of Tesoro, accounted for 93% of our total revenues for the three months ended March 31, 2012. Historically, TRMC was a customer of the Crude Oil Gathering segment and accounted for 72% of the TLLP Predecessor's total revenues in the three months ended March 31, 2011. These percentages are not comparable as no revenue was recorded for the Predecessors for transactions with TRMC in the Terminalling, Transportation and Storage segment or for trucking services in the Crude Oil Gathering segment prior to the Initial Offering.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

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