Tesoro Logistics LP Tesoro Logistics LP, Contribution of Assets (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Sale of assets date	4/1/2012
Consideration for Martinez Crude Oil Marine Terminal	$ 75.0
Issuance of Equity
Consideration for Martinez Crude Oil Marine Terminal	7.5
Cash
Consideration for Martinez Crude Oil Marine Terminal	$ 67.5
Single-berth dock
Capacity (thousand barrels per day)	145
Crude oil storage tanks
Capacity (barrels)	425,000
Assets sold (assets)	5
Firewater tanks
Capacity (barrels)	48,000
Assets sold (assets)	2
Pipelines
Logistic assets (assets)	5
Marine terminal
Logistic assets (assets)	1
Refined products terminals
Logistic assets (assets)	8
Limited Partner
Percentage ownership	52.00%
Limited Partner | Issuance of Equity
Limited partners' capital account, units issued (units)	206,362
Percentage ownership	1.00%
General Partner
Percentage ownership	2.00%
General Partner | Issuance of Equity
General partners' capital account, units issued (units)	4,212