Condensed Statements of Consolidated Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Income Statement [Abstract]
REVENUES (a)	$ 11,104		$ 8,897		$ 21,037		$ 16,244
COSTS AND EXPENSES:
Cost of sales (a)	9,867		7,909		18,815		14,472
Operating expenses	598		441		1,189		809
Selling, general and administrative expenses	92		64		123		175
Depreciation and amortization expense	135		111		265		216
(Gain) loss on asset disposals and impairments	2		8		(3)		15
OPERATING INCOME	410		364		648		557
Interest and financing costs, net	(41)	[1]	(33)	[1]	(118)	[1]	(63)	[1]
Other income, net	3	[2]	56	[2]	2	[2]	56	[2]
EARNINGS BEFORE INCOME TAXES	372		387		532		550
Income tax expense	132		138		188		196
NET EARNINGS FROM CONTINUING OPERATIONS	240		249		344		354
Loss from discontinued operations, net of tax	0		(11)		(1)		(12)
NET EARNINGS	240		238		343		342
Less: Net earnings from continuing operations attributable to noncontrolling interest	16		11		41		22
NET EARNINGS ATTRIBUTABLE TO TESORO CORPORATION	224		227		302		320
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION
Continuing operations	224		238		303		332
Discontinued operations	0		(11)		(1)		(12)
Total	224		227		302		320
NET EARNINGS (LOSS) PER SHARE - BASIC:
Continuing operations	$ 1.73		$ 1.75		$ 2.33		$ 2.44
Discontinued operations	$ 0.00		$ (0.08)		$ (0.01)		$ (0.09)
Total	$ 1.73		$ 1.67		$ 2.32		$ 2.35
Weighted average common shares outstanding - Basic	129.3		135.8		130.3		136.4
NET EARNINGS (LOSS) PER SHARE - DILUTED:
Continuing operations	$ 1.70		$ 1.72		$ 2.29		$ 2.39
Discontinued operations	$ 0.00		$ (0.08)		$ (0.01)		$ (0.09)
Total	$ 1.70		$ 1.64		$ 2.28		$ 2.30
Weighted average common shares outstanding - Diluted	131.5		138.2		132.7		138.9
DIVIDENDS PER SHARE	$ 0.25		$ 0.20		$ 0.50		$ 0.40
SUPPLEMENTAL INFORMATION:
(a) Includes excise taxes collected by our retail segment (excluding credits)	$ 152		$ 143		$ 293		$ 272

[1] 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.

[2] 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.