Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Feb. 21, 2013 Common	Feb. 21, 2013 Subordinated	Feb. 21, 2013 General Partner
Entity Registrant Name	TESORO LOGISTICS LP
Entity Central Index Key	0001507615
Document Type	10-K
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float		$ 506
Entity Common Stock, Units Outstanding			30,271,933	15,254,890	929,086