Operating Segments, Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information
Total Revenues	$ 11,104		$ 8,897		$ 21,037		$ 16,244
OPERATING INCOME	410		364		648		557
Reconciliation of Operating Income from Segments to Consolidated
Total Segment Operating Income	494		420		758		718
Corporate and unallocated costs	(84)	[1]	(56)	[1]	(110)	[1]	(161)	[1]
Segment Reporting Information, Income before Income Taxes
Interest and financing costs, net	(41)	[2]	(33)	[2]	(118)	[2]	(63)	[2]
Other income, net	3	[3]	56	[3]	2	[3]	56	[3]
EARNINGS BEFORE INCOME TAXES	372		387		532		550
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Total Depreciation and Amortization Expense	135		111		265		216
Total Capital Expenditures	167		170		270		289
Segment Reporting Table Footnotes
Federal and state motor fuel taxes on sales by our retail segment	152		143		293		272
Stock-based compensation expense (benefit)	26		(5)		8		47
Debt redemption charges					(31)		0
Refunds from settlement of rate proceedings			54				54
Refining
Segment Reporting Information
OPERATING INCOME	372		375		555		634
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Total Depreciation and Amortization Expense	105		90		206		178
Total Capital Expenditures	94		134		162		232
Refining | Refined products
Segment Reporting Information
Total Revenues	10,520		8,146		20,020		14,890
Refining | Crude oil resales and other
Segment Reporting Information
Total Revenues	354		597		626		1,066
TLLP
Segment Reporting Information
OPERATING INCOME	50	[4]	20	[4]	112	[4]	44	[4]
Reconciliation of Operating Income from Segments to Consolidated
Corporate and unallocated costs	(5)		(4)		(8)		(8)
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Total Depreciation and Amortization Expense	16		7		32		11
Total Capital Expenditures	48		22		74		33
TLLP | Crude Oil Gathering
Segment Reporting Information
Total Revenues	27		21		52		43
TLLP | Terminalling and transportation
Segment Reporting Information
Total Revenues	103		39		203		69
Retail
Segment Reporting Information
OPERATING INCOME	72		25		91		40
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Total Depreciation and Amortization Expense	10		9		20		17
Total Capital Expenditures	13		9		18		16
Retail | Fuel
Segment Reporting Information
Total Revenues	3,523	[5]	2,218	[5]	6,547	[5]	3,725	[5]
Retail | Merchandise and other
Segment Reporting Information
Total Revenues	69		59		130		107
Intersegment sales
Segment Reporting Information
Total Revenues	(3,492)		(2,183)		(6,541)		(3,656)
Corporate
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Total Depreciation and Amortization Expense	4		5		7		10
Total Capital Expenditures	12		5		16		8
Segment Reporting Table Footnotes
Stock-based compensation expense (benefit)	26		(4)		8		45
9.750% Senior Notes Due 2019
Segment Reporting Table Footnotes
Debt redemption charges					$ 31

[1] Includes stock-based compensation expense of $26 million and benefit of $4 million for the three months ended June 30, 2014 and 2013, respectively, and expense of $8 million and $45 million for the six months ended June 30, 2014 and 2013, respectively. The significant impact to stock-based compensation expense during the six months ended June 30, 2014 compared to the prior period is primarily a result of changes in Tesoro’s stock price.

[2] Includes charges totaling $31 million for premiums and unamortized debt issuance costs associated with the redemption of the 2019 Notes during the six months ended June 30, 2014.

[3] Includes $54 million in refunds from a settlement of a rate proceeding from the California Public Utilities Commission for the three and six months ended June 30, 2013.

[4] We present TLLP’s segment operating income net of general and administrative expenses totaling $5 million and $4 million representing TLLP’s corporate costs for the three months ended June 30, 2014 and 2013, respectively, and $8 million for each of the six months ended June 30, 2014 and 2013 that are not allocated to TLLP’s operating segments.

[5] Federal and state motor fuel taxes on sales by our retail segment are included in both revenues and cost of sales in our condensed statements of consolidated operations. These taxes totaled $152 million and $143 million for the three months ended June 30, 2014 and 2013, respectively, and $293 million and $272 million for the six months ended June 30, 2014 and 2013, respectively.