Statements of Consolidated Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Statement [Abstract]
REVENUES (a)	$ 40,633		$ 37,601		$ 29,809
COSTS AND EXPENSES:
Cost of sales (a)	35,691		34,085		26,045
Operating expenses	2,402		1,911		1,405
Selling, general and administrative expenses	342		337		297
Depreciation and amortization expense	562		489		418
Loss on asset disposals and impairments	4		24		23
OPERATING INCOME	1,632		755		1,621
Interest and financing costs, net	(235)	[1]	(149)	[1]	(165)	[1]
Equity in earnings of equity method investments	10		11		0
Other income (expense), net	57	[2]	63	[2]	(26)	[2]
EARNINGS BEFORE INCOME TAXES	1,464		680		1,430
Income tax expense	547	[3]	246	[3]	527	[3]
NET EARNINGS FROM CONTINUING OPERATIONS	917		434		903
Earnings (loss) from discontinued operations, net of tax	(29)		20		(133)
NET EARNINGS	888		454		770
Less: Net earnings from continuing operations attributable to noncontrolling interest	45		42		27
NET EARNINGS ATTRIBUTABLE TO TESORO CORPORATION	843		412		743
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION:
Continuing operations	872		392		876
Discontinued operations	(29)		20		(133)
Total	843		412		743
NET EARNINGS (LOSS) PER SHARE - BASIC:
Continuing operations	$ 6.79		$ 2.90		$ 6.28
Discontinued operations	$ (0.23)		$ 0.15		$ (0.95)
Total	$ 6.56	[4]	$ 3.05	[4]	$ 5.33	[4]
Weighted average common shares outstanding - Basic	128.5		135.0		139.4
NET EARNINGS (LOSS) PER SHARE - DILUTED:
Continuing operations	$ 6.67		$ 2.85		$ 6.20
Discontinued operations	$ (0.23)		$ 0.15		$ (0.95)
Total	$ 6.44	[4]	$ 3.00	[4]	$ 5.25	[4]
Weighted average common shares outstanding - Diluted	130.8		137.3		141.5
DIVIDENDS PER SHARE	$ 1.10		$ 0.90		$ 0.27
SUPPLEMENTAL INFORMATION:
(a) Includes excise taxes collected by our retail segment	$ 581		$ 567		$ 467

[1] Includes charges totaling $31 million and $10 million for premiums and unamortized debt issuance costs associated with the redemption of the 2019 Notes and 2020 Notes, respectively, during the year ended December 31, 2014.

[2] Includes $59 million in refunds and settlements approved by the CPUC related to rates charged on the crude products pipeline network for the year ended December 31, 2014. Also includes $54 million in refunds from a settlement of a rate proceeding from the CPUC, and the release of a $16 million legal reserve as a result of the favorable settlement of litigation for the year ended December 31, 2013 and accruals related to certain legal matters partially offset by receipts associated with the settlement of a pipeline rate proceeding for the year ended December 31, 2012.

[3] The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from corporate subsidiaries, but does include the tax effect of the corporate partners’ share of partnership income.

[4] Includes earnings (loss) attributable to Tesoro from continuing and discontinued operations. The sum of four quarters may not equal annual results due to rounding or the quarterly number of shares outstanding.