Condensed Statements of Consolidated Operations and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Income Statement [Abstract]
REVENUES (a)	$ 8,105		$ 7,963		$ 15,925		$ 14,489
COSTS AND EXPENSES:
Cost of sales (a)	6,885		6,985		14,053		12,720
Operating expenses	377		372		724		743
Selling, general and administrative expenses	47		27		109		122
Depreciation and amortization expense	109		106		212		209
Loss on asset disposals and impairments	6		54		12		57
OPERATING INCOME	681	[1]	419	[1]	815	[1]	638	[1]
Interest and financing costs	(34)		(60)		(70)		(103)
Other expense, net	(18)	[2]	0	[2]	(17)	[2]	0	[2]
Foreign currency exchange loss	(1)		(2)		(1)		(1)
EARNINGS BEFORE INCOME TAXES	628		357		727		534
Income tax expense	235	[3]	135	[4]	272	[4]	205	[3]
NET EARNINGS	393		222		455		329
Less net income attributable to noncontrolling interest	6		4		12		4
NET EARNINGS ATTRIBUTABLE TO TESORO CORPORATION	387		218		443		325
NET EARNINGS PER SHARE:
Basic (dollars per share)	$ 2.77		$ 1.54		$ 3.18		$ 2.29
Diluted (dollars per share)	$ 2.75		$ 1.52		$ 3.14		$ 2.26
WEIGHTED AVERAGE COMMON SHARES:
Basic (shares)	139.6		142.6		139.5		142.1
Diluted (shares)	140.5		144.4		141.2		144.2
COMPREHENSIVE INCOME
Total comprehensive income	393		222		455		329
Less noncontrolling interest in comprehensive income	6		4		12		4
COMPREHENSIVE INCOME ATTRIBUTABLE TO TESORO CORPORATION	387		218		443		325
SUPPLEMENTAL INFORMATION:
(a) Includes excise taxes collected by our retail segment (excluding credits)	$ 112		$ 92		$ 211		$ 183

[1] Includes $37 million in business interruption and property damage recoveries for the three and six months ended June 30, 2011.

[2] Includes accruals related to certain legal matters partially offset by receipts associated with the settlement of a pipeline rate proceeding for the three and six months ended June 30, 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] The income tax expense 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.