10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10‑Q

(Mark One)

R QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2012

OR

£ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ………………to …………………

Commission File Number 1‑3473

TESORO CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	95‑0862768
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
19100 Ridgewood Pkwy, San Antonio, Texas 78259-1828
(Address of principal executive offices) (Zip Code)
210‑626-6000
(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  R   No  £

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes R No £

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer   R Accelerated filer   £ Non-accelerated filer   £ Smaller reporting company  £

(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).   Yes   £    No  R

There were 140,333,989 shares of the registrant's Common Stock outstanding at April 27, 2012.

TESORO CORPORATION

QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2012

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION	Page
Item 1. Financial Statements (Unaudited)
Condensed Consolidated Balance Sheets - March 31, 2012 and December 31, 2011	3
Condensed Statements of Consolidated Operations and Comprehensive Income - Three Months Ended March 31, 2012 and 2011	4
Condensed Statements of Consolidated Cash Flows - Three Months Ended March 31, 2012 and 2011	5
Notes to Condensed Consolidated Financial Statements	6
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3. Quantitative and Qualitative Disclosures About Market Risk	50
Item 4. Controls and Procedures	52
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	53
Item 1A. Risk Factors	53
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	55
Item 6. Exhibits	56
SIGNATURES	57
EXHIBIT INDEX	58

2

PART I — FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

TESORO CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	March 31, 2012			December 31, 2011
	(Dollars in millions except per share amounts)
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	710		$	900
Receivables, less allowance for doubtful accounts	1,364			1,272
Inventories	1,715			1,763
Prepayments and other	225			216
Total Current Assets	4,014			4,151
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment, at cost	7,180			7,055
Less accumulated depreciation and amortization	(1,968		)	(1,907		)
Net Property, Plant and Equipment	5,212			5,148
OTHER NONCURRENT ASSETS
Acquired intangibles, net	223			226
Other, net	459			367
Total Other Noncurrent Assets	682			593
Total Assets	$	9,908		$	9,892
LIABILITIES AND EQUITY
CURRENT LIABILITIES
Accounts payable	$	2,313		$	2,305
Accrued liabilities	471			526
Current maturities of debt	391			418
Total Current Liabilities	3,175			3,249
DEFERRED INCOME TAXES	837			815
OTHER NONCURRENT LIABILITIES	564			567
DEBT	1,283			1,283
COMMITMENTS AND CONTINGENCIES (Note J)
EQUITY
TESORO CORPORATION STOCKHOLDERS' EQUITY
Common stock, par value $0.162/3; authorized 200,000,000 shares; 151,682,254 shares issued (150,733,991 in 2011)	25			25
Preferred stock, no par value; authorized 5,000,000 shares; 0 shares issued	—			—
Additional paid-in capital	1,025			1,000
Retained earnings	3,000			2,944
Treasury stock, 11,160,098 common shares (10,769,510 in 2011), at cost	(236		)	(226		)
Accumulated other comprehensive loss	(75		)	(75		)
Total Tesoro Corporation Stockholders' Equity	3,739			3,668
NONCONTROLLING INTEREST	310			310
Total Equity	4,049			3,978
Total Liabilities and Equity	$	9,908		$	9,892

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

TESORO CORPORATION

CONDENSED STATEMENTS OF CONSOLIDATED OPERATIONS AND COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended
	March 31,
	2012			2011
	(In millions except per share amounts)
REVENUES (a)	$	7,820		$	6,526
COSTS AND EXPENSES:
Cost of sales (a)	7,168			5,735
Operating expenses	347			371
Selling, general and administrative expenses	62			95
Depreciation and amortization expense	103			103
Loss on asset disposals and impairments	6			3
OPERATING INCOME	134			219
Interest, financing and other costs	(36		)	(42		)
Interest income and other	1			—
EARNINGS BEFORE INCOME TAXES	99			177
Income tax expense	37			70
NET EARNINGS	62			107
Less net income attributable to noncontrolling interest	6			—
NET EARNINGS ATTRIBUTABLE TO TESORO CORPORATION	$	56		$	107
NET EARNINGS PER SHARE:
Basic	$	0.40		$	0.76
Diluted	$	0.39		$	0.74
WEIGHTED AVERAGE COMMON SHARES:
Basic	139.5			141.6
Diluted	141.8			144.0
COMPREHENSIVE INCOME
Total comprehensive income	$	62		$	107
Less noncontrolling interest in comprehensive income	6			—
COMPREHENSIVE INCOME ATTRIBUTABLE TO TESORO CORPORATION	$	56		$	107
SUPPLEMENTAL INFORMATION:
(a) Includes excise taxes collected by our retail segment (excluding credits)	$	99		$	91

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

TESORO CORPORATION

CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS

(Unaudited)

	Three Months Ended
	March 31,
	2012			2011
	(Dollars in millions)
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net earnings	$	62		$	107
Adjustments to reconcile net earnings to net cash from (used in) operating activities:
Depreciation and amortization expense	103			103
Amortization of debt issuance costs and discounts	3			6
Loss on asset disposals and impairments	6			3
Stock-based compensation expense	21			48
Deferred income taxes	24			60
Excess tax benefits from stock-based compensation arrangements	(3		)	(4		)
Other changes in non-current assets and liabilities	(133		)	(9		)
Changes in current assets and current liabilities:
Receivables	(92		)	(323		)
Inventories	51			(210		)
Prepayments and other	(10		)	(54		)
Accounts payable and accrued liabilities	(47		)	484
Net cash from (used in) operating activities	(15		)	211
CASH FLOWS USED IN INVESTING ACTIVITIES
Capital expenditures	(111		)	(48		)
Acquisitions	(37		)	—
Net cash used in investing activities	(148		)	(48		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	85			60
Repayments on revolving credit agreements	(112		)	(130		)
Proceeds from stock options exercised	14			4
Distributions to noncontrolling interest	(6		)	—
Purchases of common stock	(10		)	(3		)
Excess tax benefits from stock-based compensation arrangements	3			4
Financing costs and other	(1		)	(22		)
Net cash used in financing activities	(27		)	(87		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(190		)	76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	900			648
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	710		$	724
SUPPLEMENTAL CASH FLOW DISCLOSURES
Interest paid, net of capitalized interest	$	(2	)	$	(2	)
Income taxes paid, net	$	—		$	1
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING ACTIVITIES
Capital expenditures included in accounts payable and accrued liabilities at end of period	$	36		$	17

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE A – BASIS OF PRESENTATION

As used in this report, the terms “Tesoro,” “we,” “us” or “our” may refer to Tesoro Corporation, one or more of its consolidated subsidiaries or all of them taken as a whole. The words “we,” “us” or “our” generally include Tesoro Logistics LP (“TLLP”) and its subsidiaries as consolidated subsidiaries of Tesoro Corporation with certain exceptions where there are transactions or obligations between TLLP and Tesoro Corporation or its other subsidiaries. When used in descriptions of agreements and transactions, “TLLP” or the “Partnership” refers to TLLP and its consolidated subsidiaries.

The interim condensed consolidated financial statements and notes thereto of Tesoro Corporation and its subsidiaries have been prepared by management without audit according to the rules and regulations of the Securities and Exchange Commission (“SEC”). The accompanying condensed consolidated financial statements reflect all adjustments that, in the opinion of management, are necessary for a fair presentation of results for the periods presented. Such adjustments are of a normal recurring nature, unless otherwise disclosed.

The consolidated balance sheet at December 31, 2011, has been condensed from the audited consolidated financial statements at that date. Certain information and notes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the SEC's rules and regulations. However, management believes that the disclosures presented herein are adequate to fairly present the information. The accompanying condensed consolidated financial statements and notes should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2011.

We prepare our condensed consolidated financial statements in conformity with U.S. GAAP, which requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods presented. We review our estimates on an ongoing basis, based on currently available information. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates. The results of operations for any interim period are not necessarily indicative of results for the full year. Certain prior year balances have been aggregated in order to conform to the current year presentation.

Our consolidated financial statements include TLLP, a variable interest entity. As the general partner of TLLP, we have the sole ability to direct the activities of TLLP that most significantly impact its economic performance. We are also considered to be the primary beneficiary for accounting purposes and are TLLP's primary customer. Under our long-term transportation agreements with TLLP (discussed further below), transactions with us accounted for 97% of TLLP's total revenues for the three months ended March 31, 2012. As TLLP does not derive a significant amount of revenue from third parties, there is limited risk to Tesoro associated with TLLP's operations. However, in the event that TLLP incurs a loss, our operating results will reflect TLLP's loss, net of intercompany eliminations, to the extent of our ownership interest in TLLP.

New Accounting Standards

The Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) in December 2011, which requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of these arrangements on its financial position. The guidance requires entities to disclose both gross information and net information about both instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to an agreement similar to a master netting arrangement. These provisions are effective for interim and annual reporting periods beginning on January 1, 2013. The adoption of this guidance effective January 1, 2013 will not have a material impact on our financial position, but may result in additional disclosures.

6

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The FASB issued an ASU in May 2011 related to fair value measurements and disclosures to achieve common fair value measurements and additional consistency of disclosures between U.S. GAAP and International Financial Reporting Standards. This standard includes amendments that clarify the application of existing fair value measurements and disclosure requirements, while other amendments change a principle or requirement for fair value measurements or disclosures. Some of the changes include (1) the application of the highest and best use and valuation premise concepts, (2) measuring the fair value of an instrument classified in a reporting entity’s shareholders’ equity, and (3) quantitative information required for fair value measurements categorized within level 3 of the fair value hierarchy. In addition, this standard requires additional disclosure for level 3 measurements regarding the sensitivity of fair value to changes in unobservable inputs and any interrelationships between those inputs. The adoption of this guidance effective January 1, 2012, did not have a material impact on our consolidated financial statements.

NOTE B – TESORO LOGISTICS LP

Tesoro Logistics LP, is a publicly traded limited partnership that was formed to own, operate, develop and acquire logistics assets. Its assets are integral to the success of Tesoro's refining and marketing operations and are used to gather crude oil and distribute, transport and store crude oil and refined products. Prior to April 1, 2012, its assets consisted of a crude oil gathering system in the Bakken Shale/Williston Basin area of North Dakota and Montana, eight refined products terminals in the midwestern and western United States, and a crude oil and refined products storage facility and five related short-haul pipelines in Utah. Effective April 1, 2012, Tesoro contributed to TLLP the Martinez Crude Oil Marine Terminal and associated pipelines as discussed in Note O.

As of March 31, 2012, we owned a 52% interest in TLLP, including the 2% general partner interest. We are TLLP's primary beneficiary and therefore we consolidate TLLP into our financial results. Our interest includes 304,890 common units, 15,254,890 subordinated units and 622,649 general partner units as of March 31, 2012. All intercompany transactions with TLLP are eliminated in our consolidated balances.

TLLP generates revenue by charging fees for gathering, transporting and storing crude oil and for terminalling, transporting and storing refined products. We do not provide financial or equity support through any liquidity arrangements and/or financial guarantees to TLLP.

TLLP provides us with various pipeline transportation, trucking, terminal distribution and storage services under various long-term, fee-based commercial agreements expiring 2016 through 2021. Each agreement contains minimum volume commitments with the exception of the Salt Lake City storage and transportation services agreement. Each agreement, with the exception of the trucking transportation agreement, has fees that are indexed for inflation and provides us with options to renew for two additional five-year terms. The fees under the trucking transportation agreement are adjusted annually as a result of a competitive bidding process, and the agreement will renew automatically for onefive-year term unless earlier terminated by us or TLLP.

In addition weentered into an omnibus agreement which, among other things, addresses the payment of an annual fee to us, initially in the amount of $2.5 million, for the provision of various general and administrative services. Under the operational services agreement with TLLP, TLLP reimburses us for the provision of certain operational services in support of their pipelines, terminals and storage facility.

Effective March 30, 2012, TLLP amended its senior secured revolving credit agreement (“TLLP Revolving Credit Facility”) with a syndicate of banks and financial institutions. TLLP is an excluded subsidiary under our Revolving Credit Facility. For additional information regarding our credit facilities and the TLLP Revolving Credit Facility amendment, see Note G.

7

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

TLLP is a consolidated variable interest entity. With the exception of affiliate balances, which are eliminated in consolidation, and their impact on equity, the TLLP condensed consolidated balance sheets as of March 31, 2012 and December 31, 2011, as presented below, are included in the condensed consolidated balance sheets of Tesoro Corporation.

	March 31, 2012		December 31, 2011
	(In millions)
ASSETS
Cash and cash equivalents	$	21	$	18
Receivables, less allowance for doubtful accounts
Trade	1		1
Affiliate	8		11
Other Current Assets	—		1
Net Property, Plant and Equipment	137		136
Other Noncurrent Assets	2		3
Total Assets	$	169	$	170
LIABILITIES AND EQUITY
Accounts payable
Trade	$	4	$	6
Affiliate	3		3
Deferred revenue - affiliate	2		1
Accrued liabilities	—		1
Debt	50		50
Equity	110		109
Total Liabilities and Equity	$	169	$	170

NOTE C – EARNINGS PER SHARE

We compute basic earnings per share by dividing net earnings attributable to Tesoro Corporation shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share include the effects of potentially dilutive shares, principally consisting of common stock options, unvested restricted stock, restricted stock units, market stock units and performance share awards outstanding during the period. Additionally, for the diluted earnings per share computation, net earnings attributable to Tesoro Corporation is reduced, where applicable, for the decrease in earnings from Tesoro's limited partner unit ownership in TLLP that would have resulted assuming the incremental units related to TLLP's equity incentive plans had been issued during the respective periods.

8

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Share and per share calculations are presented below (in millions except per share amounts):

	Three Months Ended
	March 31,
	2012		2011
Basic:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Basic Earnings Per Share	$	0.40	$	0.76
Diluted:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Common stock equivalents	2.3		2.4
Total diluted shares	141.8		144.0
Diluted Earnings Per Share	$	0.39	$	0.74

Potentially dilutive common stock equivalents were excluded from the calculation of diluted earnings per share, as the effect of including such securities would have been anti-dilutive, were as follows (in millions):

	Three Months Ended
	March 31,
	2012	2011
Stock options (a)	3.0	3.2

________________

(a) Common stock options presented above were excluded as the exercise prices were greater than the average market price of the common stock during each respective reporting period.

NOTE D – INVENTORIES

Components of inventories were as follows (in millions):

	March 31, 2012		December 31, 2011
Domestic crude oil and refined products	$	1,283	$	1,273
Foreign subsidiary crude oil	288		346
Materials and supplies	88		87
Oxygenates and by-products	41		43
Merchandise	15		14
Total Inventories	$	1,715	$	1,763

We use the last-in, first-out (“LIFO”) cost method as the primary method to determine the cost of crude oil held by our U.S. subsidiaries (“Domestic crude oil”) and refined product inventories in our refining and retail segments. We determine the carrying value of inventories of crude oil held by our foreign subsidiaries (“Foreign subsidiary crude oil”), oxygenates, and by-products using the first-in, first-out (“FIFO”) cost method. The total carrying value of our crude oil and refined product inventories was less than replacement cost by approximately $2.2 billion and $1.7 billion at March 31, 2012 and December 31, 2011, respectively.

9

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE E – FAIR VALUE MEASUREMENTS

We classify financial assets and financial liabilities into the following fair value hierarchy:

• level 1 - quoted prices in active markets for identical assets and liabilities;

• level 2 - quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability; and

• level 3 - unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

We measure fair value using level 1 inputs, when available, because they provide the most reliable evidence of fair value. Derivative instruments and our Renewable Identification Numbers (“RINs”) are our only financial assets and financial liabilities measured at fair value on a recurring basis. See Note F for further information on the Company's derivative instruments.

Our derivative instruments consist primarily of exchange-traded futures (“Futures Contracts”), over-the-counter swaps (“OTC Swap Contracts”), and physical commodity forward purchase and sale contracts (“Forward Contracts”). Futures Contracts are valued based on quoted prices from exchanges and are categorized in level 1 or level 2 of the fair value hierarchy based on the liquidity of the instrument. OTC Swap Contracts and Forward Contracts are valued using third-party broker quotes, industry pricing services and price curves derived from commodity exchange postings, with consideration of counterparty credit risk. These quotes are corroborated with market data and are categorized in level 2 of the fair value hierarchy. We did not have any derivative assets or liabilities classified as level 3 at March 31, 2012 or December 31, 2011.

Our RINs obligation represents a liability for the purchase of RINs to satisfy our obligation to blend biofuels into the products we produce.  A RIN is assigned to each gallon of biofuel produced or imported into the U.S. as required by the U.S. Environmental Protection Agency's (“EPA's”) Renewable Fuel Standard, which was implemented in accordance with the Energy Policy Act of 2005 and expanded by the Energy Independence and Security Act of 2007.  The EPA sets annual quotas for the percentage of biofuels that must be blended into transportation fuels consumed in the U.S., and as a producer of transportation fuels from petroleum, we are obligated to blend biofuels into the products we produce at a rate that is at least equal to the EPA's quota.  To the degree we are unable to blend at that rate, we must purchase RINs in the open market to satisfy our obligation.  Our RINs obligation is based on our RINs deficiency and the price of those RINs as of the balance sheet date.  Our RINs obligation is categorized in Level 2 of the fair value hierarchy and is measured at fair value using the market approach based on quoted prices from an independent pricing service.

Financial instruments recognized at their fair values in our consolidated balance sheets by level within the fair value hierarchy were as follows (in millions):

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of March 31, 2012
Assets:
Commodity Futures Contracts	$	174	$	7	$	—	$	(153	)	$	28
Commodity OTC Swap Contracts	—		1		—		(1		)	—
Total Assets	$	174	$	8	$	—	$	(154	)	$	28
Liabilities:
Commodity Futures Contracts	$	168	$	3	$	—	$	(171	)	$	—
Commodity OTC Swap Contracts	—		3		—		(1		)	2
RINs Obligation	—		7		—		—			7
Total Liabilities	$	168	$	13	$	—	$	(172	)	$	9

10

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of December 31, 2011
Assets:
Commodity Futures Contracts	$	86	$	9	$	—	$	(61	)	$	34
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		4		—		—			4
Total Assets	$	86	$	16	$	—	$	(63	)	$	39
Liabilities:
Commodity Futures Contracts	$	130	$	6	$	—	$	(136	)	$	—
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		1		—		—			1
RINs Obligation	—		3		—		—			3
Total Liabilities	$	130	$	13	$	—	$	(138	)	$	5

________________

(a) Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market derivative assets.

Certain of our derivative contracts, under master netting arrangements, include both asset and liability positions. We have elected to offset both the fair value amounts and any related cash collateral amounts recognized for multiple derivative instruments executed with the same counterparty when there is a legally enforceable right and an intention to settle net or simultaneously.

The physical inventory associated with the futures contracts included in the above table and selected for fair value hedge accounting treatment is adjusted to fair value at the end of the period. At December 31, 2011, the fair value adjustment related to the physical inventory was approximately $4 million. There were no fair value adjustments to the physical inventory at March 31, 2012.

We believe the carrying value of our financial instruments, including cash and cash equivalents, receivables, accounts payable and certain accrued liabilities approximate fair value. Our fair value assessment incorporates a variety of considerations, including:

• the short term duration of the instruments (less than one percent of our trade receivables and payables are outstanding for greater than 90 days); and

• the expected future insignificance of bad debt expense, which includes an evaluation of counterparty credit risk.

The fair value of our debt is based on prices from recent trade activity and is categorized in Level 2 of the fair value hierarchy. Both the carrying value and fair value of our debt at March 31, 2012, were approximately $1.7 billion. The carrying value and fair value of our debt at December 31, 2011, were approximately $1.7 billion and $1.8 billion, respectively.

There were no material nonfinancial assets or liabilities that were measured at fair value during the three months ended March 31, 2012.

NOTE F - DERIVATIVE INSTRUMENTS

The timing, direction and overall change in refined product prices versus crude oil prices impacts profit margins and has a significant impact on our earnings and cash flows. Consequently, we use non-trading derivative instruments to manage exposure to commodity price risks associated with the purchase or sale of feedstocks, products and energy supplies to or from the Company's refineries, terminals, retail operations and customers. We also use non-trading derivative instruments to manage price risks associated with inventories above or below our target levels. To achieve our objectives, we use derivative instruments such as Futures Contracts, OTC Swap Contracts and Forward Contracts, all generally with maturity dates of less than two years. We believe that there is minimal credit risk with respect to our counterparties.

11

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

We may use our excess storage capacity in Panama to take advantage of contango markets when the future price of crude oil is higher than the current spot price. We use commodity derivatives to manage price risk and hedge crude oil held in connection with these arbitrage opportunities.

We are exposed to exchange rate fluctuations on our purchases of Canadian crude oil. We enter into forward contracts of Canadian dollars to manage monthly exchange rate fluctuations.

The accounting for changes in the fair value of a commodity derivative depends on whether the derivative has been designated in a hedging relationship and whether we have elected the normal purchases and normal sales exception. The accounting for the change in fair value can be summarized as follows:

Derivative Treatment	Accounting Method
Normal purchases and normal sales exception	Accrual accounting
Designated in qualifying hedging relationship	Hedge accounting
All other derivatives	Mark-to-market accounting

The primary derivative instruments that we use have the following characteristics. Futures Contracts include a requirement to buy or sell the commodity at a fixed price in the future. OTC Swap Contracts and Forward Contracts require cash settlement for the commodity based on the difference between a fixed or floating price and the market price on the settlement date. Certain of these contracts require cash collateral if our liability position exceeds specified thresholds. At March 31, 2012, we had no cash collateral outstanding related to our OTC Swap Contracts.

The following table presents the fair value (in millions) of our derivative instruments as of March 31, 2012 and December 31, 2011. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with or received from brokers. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheet.

		Derivative Assets						Derivative Liabilities
	Balance Sheet Location	March 31, 2012			December 31, 2011			March 31, 2012			December 31, 2011
Mark-to-Market Derivatives (a):
Commodity Futures Contracts	Other Current Assets	$	181		$	95		$	171		$	136
Commodity OTC Swap Contracts	Receivables	1			1			—			—
Commodity OTC Swap Contracts	Accounts Payable	—			2			3			3
Commodity Forward Contracts	Receivables	—			4			—			—
Commodity Forward Contracts	Accounts Payable	—			—			—			1
Total Gross Mark-to-Market Derivatives		182			102			174			140
Less: Counterparty Netting and Cash Collateral (b)		(154		)	(63		)	(172		)	(138		)
Total Net Fair Value of Derivatives		$	28		$	39		$	2		$	2

________________

(a) The above fair values are presented as gross amounts, including when the derivatives are subject to master netting arrangements and qualify for net presentation in the consolidated balance sheet.

(b) As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market commodity future contracts.

12

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Gains (losses) for our mark-to market derivatives for the three months ended March 31, 2012 and 2011, were as follows (in millions):

	Three Months Ended
	March 31,
Mark-to-Market Derivatives:	2012			2011
Commodity Futures Contracts	$	(12	)	$	(56	)
Commodity OTC Swap Contracts	(6		)	(1		)
Commodity Forward Contracts	(3		)	7
Foreign Currency Forward Contracts	1			1
Total Mark-to-Market Derivatives	$	(20	)	$	(49	)

The income statement location of gains (losses) for our mark-to market derivatives above were as follows (in millions):

	Three Months Ended
	March 31,
Income Statement Location:	2012			2011
Revenues	$	(10	)	$	(16	)
Cost of sales	(11		)	(34		)
Interest, financing and other costs	1			1
Total Loss on Mark-to-Market Derivatives	$	(20	)	$	(49	)

Losses on our derivatives designated for hedge accounting during the three months ended March 31, 2012, were as follows (in millions).

Derivatives Designated for Hedge Accounting:	Amount of Loss Recognized in Income on Derivatives			Amount of Loss Recognized in Income on Hedged Item		Amount of Loss Recognized in Income on Ineffective Portion of Derivative (b)
Three months ended March 31, 2012
Commodity Futures Contracts (a)	$	—		$	—	$	—
Three months ended March 31, 2011
Commodity Futures Contracts (a)	$	(1	)	$	—	$	(1	)

________________

(a) Losses recognized in income on the derivative and the hedged item are included in cost of sales in the statements of consolidated operations.

(b) For fair value hedges, no component of the derivative instruments' gains or losses was excluded from the assessment of hedge effectiveness. No amounts were recognized in income for hedged firm commitments that no longer qualify as fair value hedges.

13

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Open Long (Short) Positions

All of our open positions are scheduled to mature within two years. As of March 31, 2012, we had an open forward contract to purchase CAD $44 million that matured on April 25, 2012. The information below presents the net volume of outstanding commodity contracts by type of instrument and year of maturity as of March 31, 2012 (volumes in thousands of barrels):

Derivatives Designated for Hedge Accounting		Mark-to-Market Derivatives
Derivative instrument and Year of maturity	Long (Short) Contract Volumes	Derivative instrument and Year of maturity	Long (Short) Contract Volumes
Swaps		Swaps
2012	—	2012	1,021
2013	—	2013	—
Futures		Futures
2012	—	2012	(3,734)
2013	—	2013	(50)
Forwards		Forwards
2012	—	2012	—

NOTE G – DEBT

Our total debt at March 31, 2012 and December 31, 2011, was comprised of the following (in millions):

Debt, including current maturities:	March 31, 2012		December 31, 2011
Tesoro Corporation Revolving Credit Facility	$	—	$	—
Tesoro Panama Company S.A. (“TPSA”) Revolving Credit Facility	90		117
TLLP Revolving Credit Facility	50		50
6¼% Senior Notes Due 2012	299		299
65/8% Senior Notes Due 2015	450		450
6½% Senior Notes Due 2017	473		473
9¾% Senior Notes Due 2019 (net of unamortized discount of $9 million)	291		291
Capital Lease Obligations and Other	21		21
Total Debt	$	1,674	$	1,701

For additional information regarding our outstanding debt, see “Capital Resources and Liquidity” in Management's Discussion and Analysis of Financial Condition and Results of Operations in Item 2.

From time to time, we may purchase our Senior Notes in the open market or in privately negotiated transactions. The timing and amount of repurchases, if any, will depend on available cash, market conditions and other considerations.

14

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Credit Facilities Overview

Our credit facilities as of March 31, 2012, were subject to the following expenses and fees.

Credit Facility	30 day Eurodollar (LIBOR) Rate	Eurodollar Margin	Base Rate	Base Rate Margin	Commitment Fee (unused portion)
Tesoro Corporation Revolving Credit Facility ($1.85 billion) (a)	0.24%	1.75%	3.25%	0.75%	0.375%
TPSA Revolving Credit Facility ($500 million) (a)	0.24%	2.75%	3.25%	1.75%	N/A
TLLP Revolving Credit Facility ($300 million) (a)	0.24%	2.50%	3.25%	1.50%	0.50%

________________

(a) We have the option to elect if the borrowings will bear interest at either a base rate plus the base rate margin, or a Eurodollar rate, for the applicable period, plus, the Eurodollar margin at the time of the borrowing. Letters of credit outstanding under the Tesoro Corporation Revolving Credit Facility and the TPSA Revolving Credit Facility incur fees at the Eurodollar margin rate and the base rate margin, respectively.

Tesoro Corporation Revolving Credit Facility (“Revolving Credit Facility”)

The Revolving Credit Facility is guaranteed by substantially all of Tesoro's active domestic subsidiaries, excluding Tesoro Logistics GP (“TLGP”) and TLLP and its subsidiaries, and is secured by substantially all of the crude oil and refined product inventories, cash and receivables of Tesoro's active domestic subsidiaries. TPSA is also not a guarantor of the Revolving Credit Facility. For additional information regarding TLLP, see Note B.

At March 31, 2012, our Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base of approximately $3.5 billion, consisting of Tesoro's eligible cash and cash equivalents, receivables and petroleum inventories (based upon a West Texas Intermediate crude oil price of $107 per barrel), net of the standard reserve as defined, or the Revolving Credit Facility's total capacity of $1.85 billion. The total available capacity can be increased up to an aggregate amount of $2.25 billion, subject to receiving increased commitments. As of March 31, 2012, we had no borrowings and $1.03 billion in letters of credit outstanding under the Revolving Credit Facility, resulting in total unused credit availability of approximately $819 million or 44% of the eligible borrowing base.

Our committed Revolving Credit Facility is scheduled to mature on March 16, 2016. The Revolving Credit Facility will terminate if the Company does not (a) refinance or pay in full, the Company's 6 1/4% notes due November 2012 on or prior to the stated maturity date, or (b) refinance or pay in full, the Company's 6 5/8% notes due November 2015 on or prior to the stated maturity date.

Our Revolving Credit Agreement and senior notes each limit our restricted payments (as defined) including our ability to pay cash dividends, repurchase stock or make voluntary repayments of subordinate debt. The aggregate amount of restricted payments cannot exceed an amount defined in each of the debt agreements. The indentures for our senior notes also limit our subsidiaries ability to make certain payments and distributions.

Letter of Credit Agreements

The Revolving Credit Facility allows us to obtain letters of credit under separate letter of credit agreements for foreign crude oil purchases. As of March 31, 2012, our four separate uncommitted letter of credit agreements had $445 million outstanding. Letters of credit outstanding under these agreements incur fees and are secured by the petroleum inventories for which they are issued. Capacity under these letter of credit agreements is available on an uncommitted basis and can be terminated by either party, at any time.

15

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

TPSA Revolving Credit Facility

TPSA, a directly and wholly owned subsidiary of Tesoro, entered into a 364-day uncommitted, secured revolving credit agreement in October 2011. TPSA is an unrestricted subsidiary under Tesoro's outstanding indentures. The TPSA Revolving Credit Facility is non-recourse to Tesoro and is guaranteed by TPSA's assets. The TPSA Revolving Credit Facility includes two uncommitted facilities, which provide for revolving borrowings, swing line loans and daylight overdraft loans and letters of credit.

The maximum capacity of these facilities as of March 31, 2012, was $500 million, consisting of $350 million under the first facility and $150 million under the second facility. Our total capacity under the TPSA facilities can be further increased up to $700 million provided the facilities' maximum amounts do not exceed $550 million and $350 million, respectively. At March 31, 2012, our TPSA Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base consisting of TPSA eligible receivables and petroleum inventories, net of reserves, or the agreement's capacity based on the net worth of TPSA. We had $90 million in borrowings outstanding under this agreement and letters of credit outstanding of $38 million at March 31, 2012.

TLLP Revolving Credit Facility

TLLP amended the TLLP Revolving Credit Facility effective March 30, 2012. Concurrent with the execution of the amendment, and pursuant to the terms of the original agreement, TLLP exercised its option to increase the total loan availability under the TLLP Credit Agreement from $150 million to an aggregate of $300 million. The amendment allows TLLP to request that the availability be increased up to an aggregate of $450 million, subject to receiving increased commitments from the lenders, compared to the original agreement which allowed an aggregate capacity of $300 million. TLLP had $50 million in borrowings outstanding under this facility at March 31, 2012.

The TLLP Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of TLLP’s subsidiaries and secured by substantially all of TLLP's assets. Borrowings available under the TLLP Revolving Credit Facility are up to the total available revolving capacity of the facility. The TLLP Revolving Credit Facility is scheduled to mature on April 25, 2014.

NOTE H - PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment, at cost, is as follows (in millions):

	March 31, 2012			December 31, 2011
Refining	$	6,247		$	6,161
Retail	717			679
Corporate	216			215
Property, plant and equipment, at cost	7,180			7,055
Accumulated depreciation	(1,968		)	(1,907		)
Net property, plant and equipment	$	5,212		$	5,148

We capitalize interest as part of the cost of major projects during the construction period. Capitalized interest totaled $4 million for both the three months ended March 31, 2012 and 2011, and is recorded as a reduction to interest and financing costs.

NOTE I – BENEFIT PLANS

Tesoro sponsors the following four defined benefit pension plans: the funded qualified employee retirement plan, the unfunded nonqualified executive security plan, the unfunded nonqualified restoration retirement plan and the unfunded nonqualified supplemental executive retirement plan. Although our funded employee retirement plan fully meets all funding requirements under applicable laws and regulations, during the three months ended March 31, 2012, we voluntarily contributed $12 million to improve the funded status of the plan.

16

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The components of pension benefit expense and other postretirement benefit expense included in the condensed statements of consolidated operations for the three months ended March 31, 2012 and 2011, were (in millions):

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2012			2011			2012			2011
Service cost	$	7		$	7		$	1		$	1
Interest cost	7			7			1			1
Expected return on plan assets	(6		)	(5		)	—			—
Amortization of prior service credit	—			—			(9		)	(9		)
Recognized net actuarial loss	6			5			3			3
Recognized curtailment loss	—			2			—			—
Net Periodic Benefit Expense (Income)	$	14		$	16		$	(4	)	$	(4	)

NOTE J - COMMITMENTS AND CONTINGENCIES

Environmental and Tax Matters

We are a party to various litigation and contingent loss situations, including environmental and income tax matters, arising in the ordinary course of business. Although we cannot predict the ultimate outcomes of these matters with certainty, we have accrued for the estimated liabilities, when appropriate. We believe that the outcome of these matters will not have a material impact on our liquidity or financial position, although the resolution of certain of these matters could have a material impact on our interim or annual results of operations. Additionally, if applicable, we accrue receivables for probable insurance or other third-party recoveries.

We are subject to extensive federal, state and local environmental laws and regulations. These laws, which change frequently, regulate the discharge of materials into the environment and may require us to remove or mitigate the environmental effects of the disposal or release of petroleum or chemical substances at various sites, install additional controls, or make other modifications to certain emission sources, equipment or facilities.

We are subject to extensive federal, state and foreign tax laws and regulations. Newly enacted tax laws and regulations, and changes in existing tax laws and regulations, could result in increased expenditures in the future. We are also subject to audits by federal, state and foreign taxing authorities in the normal course of business. It is possible that tax audits could result in claims against us in excess of recorded liabilities. We believe that resolution of any such claim(s) would not have a material impact on our financial position, results of operations and liquidity. We do not expect our unrecognized tax benefits to change significantly over the next twelve months.

Environmental Liabilities

We are incurring and expect to continue to incur expenses for environmental liabilities at a number of currently and previously owned or operated refining, pipeline, terminal and retail station properties. We have accrued liabilities for these expenses and believe these accruals are adequate based on current information and projections that can be reasonably estimated. Our environmental accruals are based on estimates including engineering assessments, and it is possible that our projections will change and that additional costs will be recorded as more information becomes available.

17

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

At both March 31, 2012 and December 31, 2011, our accruals for environmental expenditures totaled $93 million. These accruals include $55 million for both periods, related to environmental liabilities for site cleanup activities assumed from a prior owner, arising from operations at our Martinez refinery prior to August 2000. Certain projects at the Martinez refinery are subject to a cost-share agreement where we are responsible for 75% of the expenditures. Approximately $46 million of our obligations are related to this agreement. We cannot reasonably determine the full extent of remedial activities that may be required at the Martinez refinery. Therefore, it is possible that we will identify additional investigation and remediation costs as more information becomes available. We have filed insurance claims under environmental insurance policies that provide coverage up to $190 million for expenditures in excess of $50 million in self-insurance, but the insurer has challenged coverage and filed a declaratory relief action in federal court. We have not recognized possible insurance recoveries related to this matter.

We have investigated conditions at certain active wastewater treatment units at our Martinez refinery.  The investigation was driven by an order received in 2004 from the San Francisco Bay Regional Water Quality Control Board. The order named us as well as two previous owners of the Martinez refinery.  We cannot currently estimate the amount of the ultimate resolution of the order, but we believe it will not have a material adverse impact on our financial position, results of operations or liquidity.

Washington Refinery Fire

The naphtha hydrotreater unit at our Washington refinery was involved in a fire in April 2010, which fatally injured seven employees and rendered the unit inoperable. The Washington State Department of Labor & Industries (“L&I”), the U.S. Chemical Safety and Hazard Investigation Board (“CSB”) and the EPA initiated separate investigations of the incident. L&I completed its investigation in October 2010, issued citations and assessed a $2.4 million fine, which we appealed. L&I reassumed jurisdiction of the citation and affirmed the allegations in December 2010. We disagree with L&I's characterizations of operations at our Washington refinery and believe, based on available evidence and scientific reviews, that many of the agency's conclusions are mistaken. We filed an appeal of the citation in January 2011. The EPA and CSB investigations are ongoing.

In February 2011, Tesoro Corporation, Tesoro Refining and Marketing Company and other defendants were named in a lawsuit brought by the estates and families of the seven fatally injured employees arising from the April 2010 incident at our Washington refinery. In addition, a third-party truck driver has alleged damages in the lawsuit. The lawsuit includes allegations of negligence, premises liability, strict liability, product liability and seeks unspecified compensatory and punitive damages. This case, Donald and Peggy Zimmerman et al. v. Tesoro Corporation and Tesoro Refining and Marketing et al., is proceeding in the Superior Court of the State of Washington, Skagit County. The Company believes that it has defenses to the allegations contained in the lawsuit. While we cannot currently estimate the amount or timing of the resolution of this matter, and currently believe that the outcome of this matter will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations.

Our business interruption insurance deductible is satisfied after we have exceeded both 60 days of operational disruption and $25 million in losses primarily based on the operating plan that existed prior to the incident. We have filed business interruption insurance claims and collected $87 million in business interruption insurance recoveries in 2010 and 2011. As of March 31, 2012, certain business interruption claims remain open.

Other Matters

In the ordinary course of business, we become party to lawsuits, administrative proceedings and governmental investigations, including environmental, regulatory and other matters. Large, and sometimes unspecified, damages or penalties may be sought from us in some matters. We have not established accruals for these matters unless a loss is probable and the amount of loss is currently estimable. On the basis of existing information, we believe that the resolution of these matters, individually or in the aggregate, will not have a material adverse impact on our financial position, results of operations or liquidity.

18

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Legal

We are a defendant, along with other manufacturing, supply and marketing defendants, in three remaining lawsuits alleging methyl tertiary butyl ether (“MTBE”) contamination in groundwater. The defendants are being sued for having manufactured MTBE and having manufactured, supplied and distributed gasoline containing MTBE. The plaintiffs in the remaining cases, all in California, are municipalities and governmental authorities. The plaintiffs allege, in part, that the defendants are liable for manufacturing or distributing a defective product. The suits generally seek individual, unquantified compensatory and punitive damages and attorney's fees. We intend to vigorously assert our defenses against these claims. While we cannot currently estimate the amount or timing of the resolution of the remaining matters, we have established an accrual for this matter and believe that the outcome will not have a material impact our financial position, results of operations or liquidity.

During 2009, Chevron filed a lawsuit against us claiming they are entitled to a share of the refunds we received in 2008 from the owners of the Trans Alaska Pipeline System (“TAPS”). We received $50 million in 2008, net of contingent legal fees, for excessive intrastate rates charged by TAPS during 1997 through 2000, and the period of 2001 through June 2003. Chevron is asserting that it is entitled to a share of its portion of the refunds for retroactive price adjustments under our previous crude oil contracts with them. The trial court judge granted Chevron's motion for summary judgment and awarded them $16 million, including interest in September 2010. We disagree with the trial court and have appealed the decision to the Alaska Supreme Court in which the proceeding is now pending. We have established an accrual for this matter and believe that the outcome will not have a material impact on our financial position, results of operations or liquidity.

Environmental

The EPA has alleged that we have violated certain Clean Air Act regulations at our Alaska, Washington, Martinez, Hawaii and Utah refineries. We are continuing discussions of the EPA's claims with the EPA and the U.S. Department of Justice (“DOJ”). We previously received a notice of violation (“NOV”) in March 2011 from the EPA alleging violations of Title V of the Clean Air Act at our Alaska refinery. The alleged violations in the NOV arise from a 2007 state of Alaska inspection and inspections by the EPA in 2008 and 2010. We also previously received NOV's in 2005 and 2008 alleging violations of the Clean Air Act at our Washington refinery. We are evaluating all of these allegations. The ultimate resolution of these matters could require us to incur material capital expenditures and/or civil penalties. While we cannot currently estimate the amount or timing of the resolution of these matters, and currently believe that the outcome of these matters will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations.

NOTE K - STOCKHOLDERS' EQUITY

See Note L for information relating to stock-based compensation and common stock reserved for exercise of options. Changes to equity during the three months ended March 31, 2012, are presented below:

	Tesoro Corporation Stockholders' Equity			Noncontrolling Interest			Total Equity
Balance at December 31, 2011	$	3,668		$	310		$	3,978
Net earnings	56			6			62
Shares issued for equity-based compensation awards	15			—			15
Excess tax benefits from stock-based compensation arrangements	3			—			3
Amortization of equity settled awards	7			—			7
Purchases of common stock	(10		)	—			(10		)
Distributions to noncontrolling interest	—			(6		)	(6		)
Balance at March 31, 2012	$	3,739		$	310		$	4,049

19

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

We issued 0.9 million and 1.6 million shares primarily for stock option exercises under our equity-based compensation plans during the three months ended March 31, 2012 and twelve months ended December 31, 2011, respectively. 

During 2011, our Board of Directors approved a program designed to offset the dilutive effect of future stock-based compensation awards. We entered into a program to purchase approximately 1 million shares during 2012 to offset the impact of 2012 stock-based compensation awards grants.  We purchased 321,000 shares of common stock at a weighted average price of $28.22 per share for approximately $9 million during the three months ended March 31, 2012, for this program.

Our Revolving Credit Agreement and senior notes each limit our ability to pay cash dividends or repurchase stock. The limitation in each of our debt agreements is based on limits on restricted payments (as defined in our debt agreements), which include dividends, stock repurchases or voluntary prepayments of subordinate debt. The aggregate amount of restricted payments cannot exceed an amount defined in each of the debt agreements. The indentures for our senior notes also limit our subsidiaries ability to make certain payments and distributions. We do not believe that the limitations will restrict our ability to pay dividends or repurchase stock under our current programs.

NOTE L - STOCK-BASED COMPENSATION

Stock-based compensation expense included in our condensed statements of consolidated operations was as follows (in millions):    

	Three Months Ended
	March 31,
	2012		2011
Stock appreciation rights	$	12	$	35
Phantom stock options	—		11
Market stock units	3		—
Performance share awards	2		—
Other stock-based awards	4		2
Total Stock-Based Compensation Expense	$	21	$	48

We have aggregated expenses for certain award types as they are not considered significant. The income tax effect recognized in the income statement for stock-based compensation was a $8 million and a $18 million benefit for the three months ended March 31, 2012 and 2011, respectively. The income tax benefit recognized from tax deductions resulting from exercises and vestings under all of our stock-based compensation arrangements totaled $10 million for both the three months ended March 31, 2012 and 2011.

Stock Appreciation Rights

A stock appreciation right (“SAR”) entitles an employee to receive cash in an amount equal to the excess of the fair market value of one share of common stock on the date of exercise over the grant price of the SAR. The fair value of each SAR is estimated at the end of each reporting period using the Black-Scholes option-pricing model. We did not grant SARs to our employees during the three months ended March 31, 2012. We paid cash of $9 million to settle approximately 629,000 SARs that were exercised during the three months ended March 31, 2012. We had $58 million and $55 million recorded in accrued liabilities associated with our SARs awards at March 31, 2012 and December 31, 2011, respectively.

20

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Market Stock Units

We granted market stock units under the 2011 Long-Term Incentive Plan (“2011 Plan”) in February 2012. These market stock units represent the right to receive a target number of shares that will vest at the end of a three-year performance period. The number of shares ultimately issued will be based on Tesoro's stock price changes over the performance period. The market stock units' potential payout can range from 50-200% of targeted award value, unless the average closing stock price at vesting has decreased more than 50% from the average closing stock price at the grant date, then no market stock units will be paid out. The

fair value of each market stock unit is estimated on the grant date using a Monte Carlo simulation model. The estimated fair value of these market stock units is amortized over a three-year vesting period using the straight-line method. As of March 31, 2012, the estimated weighted average payout percentage for these awards was 115%. Total unrecognized compensation cost related to non-vested market stock units totaled $28 million as of March 31, 2012, which is expected to be recognized over a weighted average period of 2.6 years.

A summary of our market stock unit award activity, assuming a 100% payout, is set forth below (units in thousands):

	Number of Units		Weighted Average Grant-Date Fair Value		Intrinsic Value
					(In millions)
Nonvested at January 1, 2012	424		$	34.22	$	9
Granted	665		$	33.93
Forfeited	(11	)	$	34.29
Nonvested at March 31, 2012	1,078		$	34.04	$	33

Performance Share Awards

Performance Conditions

We granted performance condition performance share awards under the 2011 Plan in February 2012. The vesting percentages of these equity awards, range from 0-200%, and are tied to performance conditions over a three-year period. These performance share awards vest at the end of the performance period. The fair value of performance share awards tied to performance measures is estimated using the market price of our common stock on the grant date. The estimated fair value of these performance share awards is amortized over a three-year vesting period using the straight-line method. The value of the award ultimately paid will be based on return on capital employed, which is measured against the performance peer group.

Market Conditions

We granted market condition performance share awards under the 2011 Plan in February 2012. The vesting percentages of these equity awards, range from 0-200%, and are tied to market conditions over a three-year performance period. These performance share awards vest at the end of the performance period. The fair value of each performance share award is estimated using a Monte Carlo simulation model and is estimated at the end of each reporting period. The estimated fair value of these performance share awards is amortized over a three-year vesting period using the straight-line method. The value of the award ultimately paid will be based on relative total shareholder return, which is measured against the performance peer group and the S&P 500 Index.

21

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Total unrecognized compensation cost related to all non-vested performance share awards totaled $16 million as of March 31, 2012, which is expected to be recognized over a weighted average period of 2.5 years. As of March 31, 2012, the estimated weighted average payout percentage for these awards was approximately 103%. A summary of our performance share award activity, assuming a 100% payout, is set forth below (shares in thousands):

	Number of Shares		Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2012	274		$	31.53
Granted	380		$	30.98
Forfeited	(3	)	$	31.90
Nonvested at March 31, 2012	651		$	31.20

NOTE M - OPERATING SEGMENTS

The Company's revenues are derived from two operating segments, refining and retail. We own and operate seven petroleum refineries located in California, Washington, Alaska, Hawaii, North Dakota and Utah. These refineries manufacture gasoline and gasoline blendstocks, jet fuel, diesel fuel, residual fuel oil and other refined products. We sell these refined products, together with refined products purchased from third-parties, at wholesale through terminal facilities and other locations. Our refining segment also sells refined products to unbranded marketers and occasionally exports refined products to foreign markets. Our retail segment sells gasoline, diesel fuel and convenience store items through company-operated retail stations and branded jobber/dealers in 18 states. We do not have significant operations in foreign countries. Therefore, revenue in foreign countries and long-lived assets located in foreign countries are not material to our operations.

We evaluate the performance of our segments based primarily on segment operating income. Segment operating income includes those revenues and expenses that are directly attributable to management of the respective segment. Intersegment sales from refining to retail are made at prevailing market rates. Income taxes, other income, foreign currency exchange gain (loss), interest and financing costs, interest income, corporate depreciation and corporate general and administrative expenses are excluded from segment operating income. Identifiable assets are those used by the segments, whereas corporate assets are principally cash and other assets that are not associated with a specific operating segment.

22

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Segment information is as follows:

	Three Months Ended
	March 31,
	2012			2011
Revenues	(In millions)
Refining:
Refined products	$	7,562		$	6,270
Crude oil resales and other	156			155
Retail:
Fuel (a)	1,306			1,115
Merchandise and other	55			52
Intersegment sales from Refining to Retail	(1,259		)	(1,066		)
Total Revenues	$	7,820		$	6,526
Segment Operating Income (Loss)
Refining	$	191		$	303
Retail	(4		)	2
Total Segment Operating Income	187			305
Corporate and unallocated costs	(53		)	(86		)
Operating Income	134			219
Interest, financing and other costs	(36		)	(42		)
Interest income and other	1			—
Earnings Before Income Taxes	$	99		$	177
Depreciation and Amortization Expense
Refining	$	91		$	91
Retail	10			9
Corporate	2			3
Total Depreciation and Amortization Expense	$	103		$	103
Capital Expenditures
Refining	$	91		$	38
Retail	8			3
Corporate	3			1
Total Capital Expenditures	$	102		$	42

______________

(a) 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, excluding credits, totaled $99 million and $91 million for the three months ended March 31, 2012 and 2011.

	March 31,		December 31,
	2012		2011
Identifiable Assets:
Refining	$	8,236	$	8,152
Retail	703		644
Corporate	969		1,096
Total Assets	$	9,908	$	9,892

23

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE N - ACQUISITION

Retail Acquisition

In January 2012, we acquired 49 retail stations located primarily in Washington, Oregon, California, Nevada, Idaho, Utah and Wyoming, from SUPERVALU, Inc. We paid approximately $37 million for the assets, including inventories of approximately $3 million. We assumed the obligations under the seller's leases and other agreements arising after the closing date. SUPERVALU, Inc. retained certain pre-closing liabilities, including environmental matters. We have spent approximately $4 million to replace the dispensers at these stations. This acquisition added ratable and profitable supply outlets for our refined products, further strengthening our refining and marketing integration.

Pro forma information has not been presented for the acquisition as it is not material to our consolidated financial statements.

NOTE O - SUBSEQUENT EVENTS

Contribution of Martinez Crude Oil Marine Terminal

Effective April 1, 2012, we entered into a transaction (the “Contribution”) through TLGP to contribute the Martinez Crude Oil Marine Terminal and associated assets (the “Terminal”) in Martinez, California to TLLP. The Contribution was made in exchange for consideration from TLLP of $75 million, comprised of $67.5 million in cash financed with borrowings under the TLLP Revolving Credit Facility and the issuance of equity with a combined fair value of $7.5 million. The equity issued is comprised of 206,362 common units, representing an approximate 1% limited partner interest in TLLP, and 4,212 general partner units. The assets included in the Contribution include a single-berth dock, which has an estimated throughput capacity of approximately 145 thousand barrels per day (“Mbpd”), five associated crude oil storage tanks with a combined capacity of 425,000 barrels, two firewater tanks with 48,000 barrels of shell capacity and related pipelines that receive crude oil from third-party vessels for delivery to our Martinez refinery and a third-party terminal.

In connection with the Contribution, we entered into a 10-year use and throughput agreement under which the pipelines and tanks at the Terminal will be dedicated and used exclusively for the throughput and storage of our crude oil and refined products. Under the agreement, we are obligated to transport an average of at least 65 Mbpd of crude oil per month at a throughput and tankage fee of $0.55 per barrel. The fees under the agreement are indexed for inflation and the agreement gives us the option to renew for two five-year terms.

We also amended and restated the omnibus agreement (“Amended Omnibus Agreement”) in connection with the Contribution of the Terminal. Additional contributions from the Company and its affiliates to TLLP, including the assets in the Contribution, are governed by the Amended Omnibus Agreement. The fee payable to us for the provision of various general and administrative services under the Amended Omnibus Agreement did not change.

NOTE P - CONDENSED CONSOLIDATING FINANCIAL INFORMATION

Separate condensed consolidating financial information of Tesoro Corporation (the “Parent”), subsidiary guarantors and non-guarantors are presented below. Tesoro and certain subsidiary guarantors have fully and unconditionally guaranteed our 6 1/4% senior notes due 2012, 6 5/8% senior notes due 2015, 6 1/2% senior notes due 2017, and 9 3/4% senior notes due 2019. TLLP, in which we have a 52% ownership interest, and other subsidiaries have not guaranteed these obligations. As a result of these guarantee arrangements, we are required to present the following condensed consolidating financial information. The following condensed consolidating financial information should be read in conjunction with the accompanying condensed consolidated financial statements and notes. The following condensed consolidating financial information is provided as an alternative to providing separate financial statements for guarantor subsidiaries. Separate financial statements of Tesoro's subsidiary guarantors are not included because the guarantees are full and unconditional and these subsidiary guarantors are 100% owned and jointly and severally liable for Tesoro's outstanding senior notes. The information is presented using the equity method of accounting for investments in subsidiaries.

24

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Condensed Consolidating Balance Sheet as of March 31, 2012

(In millions)

	Parent		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	661		$	49	$	—		$	710
Receivables, less allowance for doubtful accounts	1		1,315			48		—			1,364
Inventories	—		1,427			288		—			1,715
Prepayments and other	118		86			21		—			225
Total Current Assets	119		3,489			406		—			4,014
Net Property, Plant and Equipment	—		4,991			221		—			5,212
Investment in Subsidiaries	4,492		(299		)	313		(4,506		)	—
Long-Term Receivables from Affiliates	2,000		—			—		(2,000		)	—
Other Noncurrent Assets	40		640			52		(50		)	682
Total Assets	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	115	$	2,468		$	201	$	—		$	2,784
Current maturities of debt	299		2			90		—			391
Total Current Liabilities	414		2,470			291		—			3,175
Long-Term Payables to Affiliates	—		1,961			39		(2,000		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,221		177			3		—			1,401
Equity-Tesoro Corporation	3,752		4,194			299		(4,506		)	3,739
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908

25

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Condensed Consolidating Balance Sheet as of December 31, 2011

(In millions)

	Tesoro Corporation		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	805		$	95	$	—		$	900
Receivables, less allowance for doubtful accounts	1		1,189			82		—			1,272
Inventories	—		1,416			347		—			1,763
Prepayments and other	106		88			22		—			216
Total Current Assets	107		3,498			546		—			4,151
Net Property, Plant and Equipment	—		4,925			223		—			5,148
Investment in Subsidiaries	4,436		(284		)	282		(4,434		)	—
Long-Term Receivables from Affiliates	1,944		—			—		(1,944		)	—
Other Noncurrent Assets	42		548			53		(50		)	593
Total Assets	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	85	$	2,420		$	326	$	—		$	2,831
Current maturities of debt	299		2			117		—			418
Total Current Liabilities	384		2,422			443		—			3,249
Long-Term Payables to Affiliates	—		1,922			22		(1,944		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,200		177			5		—			1,382
Equity-Tesoro Corporation	3,681		4,147			274		(4,434		)	3,668
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892

26

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	9,633		$	596		$	(2,409	)	$	7,820
Costs and expenses	2			9,506			587			(2,409		)	7,686
OPERATING INCOME (LOSS)	(2		)	127			9			—			134
Equity in earnings (loss) of subsidiaries	59			(13		)	31			(77		)	—
Other expense	(1		)	(32		)	(2		)	—			(35		)
EARNINGS (LOSS) BEFORE INCOME TAXES	56			82			38			(77		)	99
Income tax expense (a)	—			35			2			—			37
NET EARNINGS (LOSS)	56			47			36			(77		)	62
Less net income attributable to noncontrolling interest	—			—			6			—			6
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION STOCKHOLDERS	$	56		$	47		$	30		$	(77	)	$	56
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	56		$	47		$	36		$	(77	)	$	62
Less noncontrolling interest in comprehensive income	—			—			6			—			6
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	$	56		$	47		$	30		$	(77	)	$	56

_______________

(a) 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.

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	8,241		$	688		$	(2,403	)	$	6,526
Costs and expenses	4			8,023			683			(2,403		)	6,307
OPERATING INCOME (LOSS)	(4		)	218			5			—			219
Equity in earnings (loss) of subsidiaries	109			(12		)	—			(97		)	—
Other expense	—			(40		)	(2		)	—			(42		)
EARNINGS (LOSS) BEFORE INCOME TAXES	105			166			3			(97		)	177
Income tax expense (benefit) (a)	(2		)	71			1			—			70
NET EARNINGS (LOSS)	$	107		$	95		$	2		$	(97	)	$	107
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	107		$	95		$	2		$	(97	)	$	107
TOTAL COMPREHENSIVE INCOME (LOSS)	$	107		$	95		$	2		$	(97	)	$	107

_______________

(a) The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from subsidiaries.

27

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	13		$	(12	)	$	(16	)	$	—		$	(15	)
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(107		)	(4		)	—			(111		)
Acquisitions	—			(37		)	—			—			(37		)
Intercompany notes, net	(20		)	—			—			20			—
Net cash from (used in) investing activities	(20		)	(144		)	(4		)	20			(148		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			85			—			85
Repayments on revolving credit agreements	—			—			(112		)	—			(112		)
Proceeds from stock options exercised	14			—			—			—			14
Excess tax benefits from stock-based compensation arrangements	—			3			—			—			3
Distributions to noncontrolling interest	—			—			(6		)	—			(6		)
Purchases of common stock	(10		)	—			—			—			(10		)
Net intercompany borrowings (repayments)	—			6			14			(20		)	—
Distributions to Subordinated unitholders	3			3			(6		)	—			—
Financing costs and other	—			—			(1		)	—			(1		)
Net cash from (used in) financing activities	7			12			(26		)	(20		)	(27		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			(144		)	(46		)	—			(190		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			805			95			—			900
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	661		$	49		$	—		$	710

28

TESORO CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	5		$	422		$	(216	)	$	—		$	211
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(48		)	—			—			(48		)
Intercompany notes, net	16			—			—			(16		)	—
Net cash from (used in) investing activities	16			(48		)	—			(16		)	(48		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			60			—			60
Repayments on revolving credit agreements	—			—			(130		)	—			(130		)
Proceeds from stock options exercised	4			—			—			—			4
Purchases of common stock	(3		)	—			—			—			(3		)
Excess tax benefits from stock-based compensation arrangements	—			4			—			—			4
Net intercompany borrowings (repayments)	—			(291		)	275			16			—
Financing costs and other	(22		)	—			—			—			(22		)
Net cash from (used in) financing activities	(21		)	(287		)	205			16			(87		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			87			(11		)	—			76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			612			36			—			648
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	699		$	25		$	—		$	724

29

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Those statements in this section that are not historical in nature should be deemed forward-looking statements that are inherently uncertain. See “Important Information Regarding Forward-Looking Statements” on page 49 for a discussion of the factors that could cause actual results to differ materially from those projected in these statements. This section should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2011.

BUSINESS STRATEGY AND OVERVIEW

Strategy and Goals

Our vision is to be the premier low-cost supplier of transportation fuels in the refining and marketing business within our markets, providing value for our customers while delivering industry leading returns for our shareholders and conducting ourselves responsibly in the communities in which we operate. To achieve these goals we are pursuing the following strategic priorities:

• improve operational efficiency and effectiveness by focusing on safety and reliability, system improvements and cost leadership;

• drive commercial excellence by strengthening our supply and trading activities to provide additional value to the business;

• strengthen our financial position by exercising capital discipline and focusing on improving our liquidity; and

• capture value-driven growth through a focus on our logistics assets and growing our marketing business.

Our goals were focused on these strategic priorities and we accomplished the following in the first quarter of 2012:

	Operational Efficiency & Effectiveness	Commercial Excellence	Financial Discipline	Value Driven Growth
Decreased manufacturing costs per barrel by approximately 5% compared to the first quarter of 2011	l
Leveraged our logistics operations to strategically source advantaged crude and provide market optionality for the sale of refined products		l
Completed planned turnaround activity at our Martinez refinery and made significant progress on our large capital refinery projects	l			l
Began to purchase shares of common stock to offset the dilutive effects of new stock-based compensation awards granted in 2012			l
Amended the TLLP Revolving Credit Facility and increased the capacity up to $300 million to support logistics growth			l	l
Strengthened refining and marketing integration with the successful acquisition of 49 retail stations during the first quarter				l

30

Tesoro Logistics LP

As part of our business strategy, we formed Tesoro Logistics LP (“TLLP”) to own, operate, develop and acquire logistics assets to gather crude oil and distribute, transport and store crude oil and refined products. Tesoro Logistics GP, LLC (“TLGP”), a 100% consolidated subsidiary, serves as the general partner of TLLP. As of March 31, 2012, TLLP's assets consist of a crude oil gathering system in the Bakken Shale/Williston Basin area, eight refined products terminals in the western United States, a crude oil and refined products storage facility and five related short-haul pipelines in Utah. We held an approximate 52% interest in TLLP, including the interest of the general partner, as of March 31, 2012.

Effective April 1, 2012, we contributed the Martinez Crude Oil Marine Terminal to TLLP for total consideration of $75 million, consisting of $67.5 million of cash and $7.5 million of TLLP equity. The terminal consists of a single-berth dock, five crude oil storage tanks with a combined storage capacity of 425,000 barrels, two firewater tanks with 48,000 barrels of shell capacity and related pipelines that receive crude oil from third-party marine vessels for delivery to our Martinez refinery and a third-party terminal. Total throughput capacity for the terminal is estimated to be approximately 145,000 barrels per day (“Mbpd”).

TLLP amended its senior secured revolving credit agreement ("TLLP Revolving Credit Facility") effective March 30, 2012. Concurrent with the execution of the amendment, and pursuant to the terms of the original agreement, TLLP exercised its option to increase the total loan availability under the TLLP Credit Agreement from $150 million to an aggregate of $300 million. The amendment allows TLLP to request that the availability be increased up to an aggregate of $450 million, subject to receiving increased commitments from the lenders, compared to the original agreement which allowed an aggregate capacity of $300 million. On April 2, 2012, TLLP borrowed and distributed to us $67.5 million from the TLLP Revolving Credit Facility, for the contribution of the Martinez Crude Oil Marine Terminal discussed above. The TLLP Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of TLLP's subsidiaries and secured by substantially all of TLLP's assets. For additional information regarding our credit facilities, see “Capital Resources and Liquidity.”

Labor Negotiations

The collective bargaining agreements for hourly represented employees located at six of our seven refineries expired in 2012.  We have been engaged in negotiations with the United Steelworkers (“USW”) local representatives at our Anacortes, Washington; Kapolei, Hawaii; Mandan, North Dakota; Martinez, California; Los Angeles, California and Salt Lake City, Utah refineries.  Negotiations resulted in ratification of the three-year contracts at our Kapolei, Hawaii and Salt Lake City, Utah refineries.  We are continuing negotiations with hourly represented employees at our Anacortes, Washington; Mandan, North Dakota; Martinez, California and Los Angeles, California refineries. We have offered contract terms, consistent with the terms of the national pattern agreement already accepted by the refining industry and the international USW at three locations covering approximately 800 employees.  We believe that our offers at these refineries are fair, competitive and consistent with other national agreements accepted by the USW.  Negotiations with the USW local representatives at our Los Angeles, California refinery are at an earlier stage of the process since the agreement, which covers approximately 250 employees, expired on April 30, 2012.

We continue to bargain in good faith at all remaining locations and work toward ratification of these agreements; however, there is no assurance an agreement will be reached without a strike, work stoppage or other labor action at any of these locations.   In the event of a work stoppage, we plan to safely operate our refineries at Anacortes, Washington; Mandan, North Dakota and Los Angeles, California.  We initially plan to operate our Martinez, California refinery as a product terminal, allowing us to meet customer commitments while we begin training to return the refinery to production.   Any prolonged strike, work stoppage or other labor action at any of these locations could have an adverse effect on our financial condition or results of operations.

31

Industry Overview

Our profitability is heavily influenced by the cost of crude oil and the aggregate value of the products we make from that crude oil and is affected by changes in economic conditions. Product values and crude oil costs are set by the market and are outside of the control of independent refiners.

West Coast Average Key Commodity Prices and Differentials

(Dollars per barrel)

Crude Oil and Product Price Analysis

Persistent moderate to high unemployment in the U.S. and high retail gasoline prices continue to suppress demand. Global concerns, including the on-going European debt crisis and heightened tensions in the Middle East contributed to market volatility during the first quarter of 2012. The nationwide unemployment rate fell by 0.3% over the course of the first quarter of 2012. In California, a key market area for Tesoro, the state's unemployment rate was 11.0% at the end of the quarter, down from 11.9% in the 2011 first quarter.

Global product demand growth continues to be driven largely by emerging markets as Asia and Latin America continue to show stronger growth than developed countries. This strong growth rate combined with refinery reliability issues in those emerging markets, primarily in Latin America, have provided an export opportunity for U.S. light products, particularly diesel exports. Exports to these markets continue to provide an outlet for U.S. refining capacity, which has supported margins during this time.

During the first quarter of 2012, seasonal declines in demand were offset by lower refinery production due to refinery turnarounds and downtime. Average U.S. West Coast benchmark diesel fuel margins remained relatively flat compared to the fourth quarter of 2011. Increased diesel exports to foreign countries have driven refiners to shift production capacity to capture these opportunities. The resulting increase in inventories, coupled with seasonally low domestic demand kept diesel fuel margins in line with the fourth quarter of 2011. However, U.S. West Coast benchmark gasoline margins more than doubled to almost $14 per barrel compared to $6 per barrel in the fourth quarter of 2011. West Coast refiners also benefited from lower prices for heavy California crude oils relative to the fourth quarter of 2011, as discounts relative to Brent crude oil ("Brent") increased to about $8 per barrel.

32

Mid-Continent Average Key Commodity Prices and Differentials

(Dollars per barrel)

The price differential between Mid-Continent crudes and waterborne crudes rebounded during the first quarter of 2012, contributing to strong refining margins in the Mid-Continent region. The West Texas Intermediate (“WTI”) to Brent differential widened to nearly $19 per barrel at the end of the first quarter of 2012, compared to only $8 per barrel at the end of December 2011. During the first quarter of 2012, we began to base the pricing of a portion of our waterborne crude oil purchases off of Brent. Also contributing to strong refining margins in the Mid-Continent and Pacific Northwest regions, were advantaged price differentials for Bakken and Canadian crudes in the first quarter of 2012. The Bakken to WTI differential widened to $12 per barrel at the end of the first quarter, compared to $3 per barrel at the end of December 2011. Our North Dakota refinery currently runs 100% Bakken crude oil. The Canadian Light Sweet to WTI differential widened to $11 per barrel at the end of the first quarter, compared to $4 per barrel at the end of December 2011. Our Washington refinery runs a significant amount of Canadian Light Sweet crude oil.   

Outlook

Volatility in commodity prices, disruptions to supply chains and general uncertainty has impacted businesses across the globe, slowing the recovery in both mature and emerging markets. It is to be expected that commodity price volatility will continue to remain high. In the outlook for 2012, demand for oil is expected to weaken slightly because of slower economic growth in developed countries, offset by increased energy needs of developing countries, as well as the restocking of inventories in anticipation of summer driving months. Although political turmoil has eased in the Middle East and North Africa, there remains the possibility that oil supplies from one or more countries could be disrupted as mounting tensions with Iran could yield a sharp increase in prices.

In addition to current market conditions, there are long-term factors that may impact the supply and demand of refined products in the U.S. including:

• world crude oil prices;

• increased federal fuel efficiency standards for motor vehicles;

• increased volumes of renewable fuels, mandated by the federal Clean Air Act;

• various regulations of greenhouse gas emissions from stationary and mobile sources by the U.S. Environmental Protection Agency (“EPA”) pursuant to the Federal Clean Air Act and California statute;

• potential enactment of federal climate change legislation; and

• possible promulgation of national regulations relative to gasoline composition and ozone standards under the federal Clean Air Act.

33

RESULTS OF OPERATIONS - THREE MONTHS ENDEDMARCH 31, 2012, COMPARED WITH THREE MONTHS ENDEDMARCH 31, 2011

A discussion and analysis of the factors contributing to our results of operations is presented below. The accompanying condensed consolidated financial statements, together with the following information, are intended to provide investors with a reasonable basis for assessing our historical operations, but should not serve as the only criteria for predicting our future performance. Revenue and income generated by TLLP was not significant to our consolidated results of operations.

Summary

Our net earnings were $56 million ($0.39 per diluted share) for the three months ended March 31, 2012 (“2012 Quarter”), compared with net earnings of $107 million ($0.74 per diluted share) for the three months ended March 31, 2011 (“2011 Quarter”). The decrease in net earnings of $0.35 per diluted share during the 2012 Quarter was primarily due to the following:

• lower throughputs and gross refining margins in the California region as a result of a major planned turnaround at our Martinez refinery; and

• lower industry margins in California as a result of increased crude oil prices relative to refined product prices.

The decrease in net earnings during the 2012 Quarter relative to the 2011 Quarter was partially offset by the following:

• strong gross refining margins in the Mid-Continent and Pacific Northwest regions driven by feedstock advantages from local crude discounts and increased throughputs;

• higher throughputs in the Mid-Continent and Pacific Northwest regions; and

• a $30 million decrease in incentive and stock-based compensation expense, primarily resulting from less significant increases in Tesoro stock prices during the 2012 Quarter as compared to the 2011 Quarter.

34

Refining Segment

	Three Months Ended
	March 31,
	2012			2011
	(Dollars in millions except per barrel amounts)
Revenues
Refined products (a)	$	7,562		$	6,270
Crude oil resales and other (b)	156			155
Total Revenues	$	7,718		$	6,425
Throughput (thousand barrels per day)
Heavy crude (c)	142			186
Light crude	358			338
Other feedstocks	29			37
Total Throughput	529			561
% Heavy Crude Oil of Total Refining Throughput (c)	27		%	33		%
Yield (thousand barrels per day)
Gasoline and gasoline blendstocks	253			289
Jet fuel	83			79
Diesel fuel	105			126
Heavy oils, residual products, internally produced fuel and other	114			100
Total Yield	555			594
Gross refining margin ($/throughput barrel) (d)	$	12.15		$	14.33
Manufacturing Cost before Depreciation and Amortization Expense ($/throughput barrel) (d)	$	4.97		$	5.22

________________

(a) Refined products sales includes intersegment sales to our retail segment at prices, which approximate market of $1.3 billion and $1.1 billion for the three months ended March 31, 2012 and 2011.

(b) Crude oil resales and other includes third-party revenues earned by TLLP. Consolidated revenues for the refining segment include $1 million from TLLP for the three months ended March 31, 2012, and $1 million from TLLP's predecessor for the three months ended March 31, 2011. Amounts recorded for TLLP are included in our regional refining operating data.

(c) We define heavy crude oil as crude oil with an American Petroleum Institute gravity of 24 degrees or less. The decrease in heavy crude oil throughput and heavy crude oil as a percentage of total refining throughput during the three months ended March 31, 2012, was primarily a result of the turnaround at the Martinez refinery which runs a high proportion of heavy crude oil.

(d) Management uses gross refining margin per barrel to evaluate performance and compare profitability to other companies in the industry. There are a variety of ways to calculate gross refining margin per barrel; different companies may calculate it in different ways. We calculate gross refining margin per barrel by dividing gross refining margin (revenues less costs of feedstocks, purchased refined products, transportation and distribution) by total refining throughput. Management uses manufacturing costs per barrel to evaluate the efficiency of refining operations. There are a variety of ways to calculate manufacturing costs per barrel; different companies may calculate it in different ways. We calculate manufacturing costs per barrel by dividing manufacturing costs by total refining throughput. Investors and analysts use these financial measures to help analyze and compare companies in the industry on the basis of operating performance. These financial measures should not be considered alternatives to segment operating income, revenues, costs of sales and operating expenses or any other measure of financial performance presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).

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Refining Segment

	Three Months Ended
	March 31,
	2012		2011
	(Dollars in millions except per barrel amounts)
Segment Operating Income
Gross refining margin (e)	$	585	$	724
Expenses
Manufacturing costs	239		264
Other operating expenses	52		56
Selling, general and administrative expenses	9		8
Depreciation and amortization expense (f)	91		91
Loss on asset disposals and impairments	3		2
Segment Operating Income	$	191	$	303
Refined Product Sales (thousand barrels per day) (g)
Gasoline and gasoline blendstocks	342		325
Jet fuel	94		86
Diesel fuel	131		130
Heavy oils, residual products and other	90		74
Total Refined Product Sales	657		615
Refined Product Sales Margin ($/barrel) (g)
Average sales price	$	127.11	$	113.33
Average costs of sales	117.75		99.98
Refined Product Sales Margin	$	9.36	$	13.35

_______________

(e) Consolidated gross refining margin combines gross refining margin for each of our regions adjusted for other amounts not directly attributable to a specific region. Other amounts resulted in a decrease of $1 million and increase of $5 million for the three months ended March 31, 2012 and 2011, respectively. Gross refining margin includes the effect of intersegment sales to the retail segment at prices, which approximate market. Gross refining margin approximates total refining throughput multiplied by the gross refining margin per barrel.

(f) Includes manufacturing depreciation and amortization expense per throughput barrel of approximately $1.80 and $1.72 for the three months ended March 31, 2012 and 2011.

(g) Sources of total refined product sales include refined products manufactured at our refineries and refined products purchased from third-parties. Total refined product sales margins include margins on sales of manufactured and purchased refined products.

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Refining Data by Region

	Three Months Ended
	March 31,
	2012		2011
	(Dollars in millions except per barrel amounts)
California (Martinez and Los Angeles)
Refining throughput (thousand barrels per day) (h)	189		248
Gross refining margin	$	138	$	372
Gross refining margin ($/throughput barrel) (d)	$	7.98	$	16.66
Manufacturing cost before depreciation and amortization expense (d) ($/throughput barrel)	$	7.34	$	6.68
Pacific Northwest (Washington and Alaska)
Refining throughput (thousand barrels per day)	155		135
Gross refining margin	$	183	$	163
Gross refining margin ($/throughput barrel) (d)	$	12.96	$	13.39
Manufacturing cost before depreciation and amortization expense (d) ($/throughput barrel)	$	3.83	$	4.08
Mid-Pacific (Hawaii)
Refining throughput (thousand barrels per day)	67		69
Gross refining margin	$	13	$	(19	)
Gross refining margin ($/throughput barrel) (d)	$	2.07	$	(3.05	)
Manufacturing cost before depreciation and amortization expense (d) ($/throughput barrel)	$	3.51	$	4.69
Mid-Continent (North Dakota and Utah)
Refining throughput (thousand barrels per day)	118		109
Gross refining margin	$	252	$	203
Gross refining margin ($/throughput barrel) (d)	$	23.51	$	20.77
Manufacturing cost before depreciation and amortization expense (d) ($/throughput barrel)	$	3.47	$	3.65

____________________

(h) We experienced reduced throughput due to a scheduled turnaround at our Martinez refinery during the 2012 first quarter.

Three Months EndedMarch 31, 2012, Compared with Three Months EndedMarch 31, 2011

Overview. Operating income for our refining segment decreased by $112 million, or 37%, to $191 million during the 2012 Quarter as compared to the 2011 Quarter. The decrease is primarily due to lower industry margins, lower refinery throughput rates and negative yield impacts as a result of major planned turnaround activity at our Martinez refinery during the 2012 Quarter.

Gross Refining Margins. Our gross refining margin per barrel decreased by $2.18 per barrel, or 15%, to $12.15 per barrel in the 2012 Quarter as compared to the 2011 Quarter, in line with lower industry margins. Industry distillate margins on the U.S. West Coast decreased approximately 13% as a result of seasonally high inventory early in the 2012 Quarter and lower diesel demand driven by lower West Coast port container traffic. Industry gasoline margins on the U.S. West Coast declined approximately 3% during the 2012 Quarter as compared to the 2011 Quarter as a result of lower demand due to high unemployment and rising retail street prices driven by increased crude costs. In the California region, gross refining margin per barrel was negatively affected by lower light product yields impact as a result of the planned turnaround at our Martinez refinery.

Partially offsetting lower industry margin product yields were advantaged crude costs relative to industry benchmarks and benefits from ethanol blending during the quarter. Mid-Continent crude oil logistic constraints continued to elevate the price spread between crude oil priced off WTI as compared to crude oil priced off waterborne crude oil benchmarks, such as Brent, during the 2012 Quarter. This situation has decreased the relative crude oil costs for our Mid-Continent refineries, which increased refining margin per barrel 13% in this region. The increase in gross refining margin per barrel positively impacted total Mid-Continent gross refining margins by $49 million during the 2012 Quarter as compared to the 2011 Quarter.

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We use non-trading derivative instruments to manage exposure to commodity price risks associated with the purchase or sale of crude oil and finished products. We also use non-trading derivative instruments to manage price risks associated with inventories above or below our target levels. Losses associated with our commodity derivative instruments are included in gross refining margin. Our losses totaled $21 million and $51 million during the 2012 and 2011 Quarter, respectively, due to price movements of crude oil and refined products.

Refining Throughput. Total refining throughput decreased 32 Mbpd, or 6%, to 529 Mbpd during the 2012 Quarter as compared to the 2011 Quarter. The decrease was primarily the result of our Martinez refinery operating at reduced rates during the 2012 Quarter due to a major scheduled turnaround.

Refined Products Sales. Revenues from sales of refined products increased $1.3 billion, or 21% to $7.6 billion in the 2012 Quarter as compared to the 2011 Quarter, primarily due to significantly higher average refined product sales prices and increased refined product sales volumes. Our average product sales price increased $13.78 per barrel, or 12%, to $127.11 per barrel in the 2012 Quarter as compared to the 2011 Quarter, as higher crude oil prices put upward pressure on product prices. Total refined product sales increased by 42 Mbpd, or 7%, to 657 Mbpd in the 2012 Quarter as compared to the 2011 Quarter. Refined product sales volumes were impacted by increased demand for diesel fuel and gasoline.

Costs of Sales and Expenses. Our average costs of sales increased by $17.77 per barrel, or 18%, to $117.75 per barrel during the 2012 Quarter as compared to the 2011 Quarter, reflecting higher crude oil prices impacted by global market events discussed in “Business Strategy and Overview.” Manufacturing and other operating expenses decreased by $29 million, to $291 million in the 2012 Quarter as compared to the 2011 Quarter reflecting lower energy and natural gas costs during the 2012 Quarter as compared to the 2011 Quarter.

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Retail Segment

	Three Months Ended
	March 31,
	2012			2011
	(Dollars in millions except per gallon amounts)
Revenues
Fuel	$	1,306		$	1,115
Merchandise and other	55			52
Total Revenues	$	1,361		$	1,167
Fuel Sales (millions of gallons)	379			355
Fuel Margin ($/gallon) (a)	$	0.12		$	0.14
Merchandise Margin	$	12		$	12
Merchandise Margin (percent of revenues)	25		%	26		%
Average Number of Stations (during the period)
Company-operated	413			380
Branded jobber/dealer	794			719
Total Average Retail Stations (b)	1,207			1,099
Segment Operating Income (Loss)
Gross Margins
Fuel (a)	$	47		$	49
Merchandise and other non-fuel	19			18
Total Gross Margins	66			67
Expenses
Operating expenses	54			51
Selling, general and administrative expenses	4			4
Depreciation and amortization expense	10			9
Loss on asset disposals and impairments	2			1
Segment Operating Income (Loss)	$	(4	)	$	2

_________

(a) Management uses fuel margin per gallon to compare profitability to other companies in the industry. There are a variety of ways to calculate fuel margin per gallon; different companies may calculate it in different ways. We calculate fuel margin per gallon by dividing fuel gross margin by fuel sales volumes. Investors and analysts use fuel margin per gallon to help analyze and compare companies in the industry on the basis of operating performance. This financial measure should not be considered as an alternative to segment operating income and revenues or any other measure of financial performance presented in accordance with U.S. GAAP. Fuel and fuel margin per gallon include the effect of intersegment purchases from the refining segment at prices which approximate market.

(b) Reflects the acquisition of 49 stations from SUPERVALU, Inc. during the first quarter of 2012.

Three Months EndedMarch 31, 2012, Compared with Three Months EndedMarch 31, 2011

Operating Income. Operating income for our retail segment decreased $6 million to a $4 million operating loss during the 2012 Quarter as compared to the 2011 Quarter. Total gross margin decreased $1 million, or 1%, to $66 million during the 2012 Quarter as compared to the 2011 Quarter. Retail fuel margin per gallon decreased 14% to $0.12 per gallon during the 2012 Quarter causing fuel gross margins to decrease $2 million from the 2011 Quarter. During the 2012 Quarter, rising wholesale fuel costs outpaced increases in retail street prices, which negatively impacted operating income and retail margins. This was partially offset by a 24 million gallon, or 7%, increase in fuel sales volumes during the 2012 Quarter as compared to the 2011 Quarter reflecting additional volumes as a result of the higher average station count due to our recent acquisition in the 2012 Quarter. Merchandise and other non-fuel gross margin remained flat between the 2011 and 2012 Quarters as our recently acquired stations do not have significant merchandise sales.

Fuel sales revenues increased $191 million, or 17%, to $1.3 billion in the 2012 Quarter as compared to $1.1 billion in the 2011 Quarter, reflecting significantly higher average sales prices and increased fuel sales volumes as a result of the higher average station count during the 2012 Quarter. Costs of sales increased from the 2011 Quarter due to higher prices for purchased fuel. Our other expenses remained relatively consistent as compared to the 2011 Quarter.

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Consolidated Results of Operations

Selling, General and Administrative Expenses. Our selling, general and administrative expenses decreased $33 million, or 35% to $62 million in the 2012 Quarter from $95 million in the 2011 Quarter. The decrease was primarily attributable to lower stock-based compensation expense recorded for our stock appreciation rights, which decreased by $23 million. Our stock appreciation rights are adjusted to fair value at the end of each reporting period using a Black-Scholes model where stock price is a significant assumption. Our stock price increased only 15% during the 2012 Quarter, as compared to a 45% increase during the 2011 Quarter. Additionally, expense related to our phantom stock options decreased by $11 million, as there were no phantom stock options outstanding and no associated expense in the 2012 Quarter, compared to $11 million of expense incurred for these awards during the 2011 Quarter.

Interest, Financing and Other Costs. Interest, financing and other costs decreased $6 million, or 14%, to $36 million in the 2012 Quarter from $42 million during the 2011 Quarter. The decrease reflects lower interest expense resulting from the overall reduction in debt outstanding in the 2012 Quarter due to the early redemption of our Junior Subordinated Notes during the second quarter of 2011 and the repurchase of a portion of our 6 1/4% Notes and 6 1/2% Notes during the third quarter of 2011.

Income Tax Provision. Our income tax expense totaled $37 million in the 2012 Quarter versus $70 million in the 2011 Quarter. The combined federal and state effective income tax rate was 37% and 40% during the 2012 Quarter and the 2011 Quarter, respectively. The decline in the effective tax rate was primarily due to the inclusion of non-taxable earnings, attributable to noncontrolling interests, in the calculation of the 2012 effective tax rate.

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CAPITAL RESOURCES AND LIQUIDITY

Overview

We operate in an environment where our capital resources and liquidity are impacted by changes in the price of crude oil and refined products, availability of trade credit, market uncertainty and a variety of additional factors beyond our control. These factors include the level of consumer demand for transportation fuels, weather conditions, fluctuations in seasonal demand, governmental regulations, geo-political conditions and overall market and global economic conditions. See “Important Information Regarding Forward-Looking Statements” on page 49 for further information related to risks and other factors. Future capital expenditures, as well as borrowings under our credit agreement and other sources of capital, may be affected by these conditions.

Credit Facilities Overview

Our primary sources of liquidity have been cash flows from operations and borrowing availability under revolving lines of credit. We ended the first quarter of 2012 with $710 million of cash and cash equivalents, no borrowings under the Tesoro Corporation Revolving Credit Facility, $90 million in borrowings under the Tesoro Panama Company S.A. (“TPSA”) Revolving Credit Facility, and $50 million in borrowings under the TLLP Revolving Credit Facility. We believe available capital resources will be adequate to meet our capital expenditure, working capital and debt service requirements. We remain focused on strengthening our balance sheet, and anticipate retiring the remaining $299 million of 6 1/4% Senior Notes in 2012. We had borrowing ability under our committed credit agreements as follows (in millions):

	Total Capacity		Amount Borrowed as of March 31, 2012		Outstanding Letters of Credit		Available Capacity
Tesoro Corporation Revolving Credit Facility (a)	$	1,850	$	—	$	1,031	$	819
TPSA Revolving Credit Facility	500		90		38		372
TLLP Revolving Credit Facility	300		50		—		250
Letter of Credit Facilities	796		—		445		351
Total credit agreements	$	3,446	$	140	$	1,514	$	1,792

_______________

(a)Borrowing base is the lesser of the amount of the periodically adjusted borrowing base or the agreement's total capacity.

Our credit facilities as of March 31, 2012, were subject to the following expenses and fees.

Credit Facility	30 day Eurodollar (LIBOR) Rate	Eurodollar Margin	Base Rate	Base Rate Margin	Commitment Fee (unused portion)
Tesoro Corporation Revolving Credit Facility ($1.85 billion) (b)	0.24%	1.75%	3.25%	0.75%	0.375%
TPSA Revolving Credit Facility ($500 million) (b)	0.24%	2.75%	3.25%	1.75%	N/A
TLLP Revolving Credit Facility ($300 million) (b)	0.24%	2.50%	3.25%	1.50%	0.50%

_______________

(b) We have the option to elect if the borrowings will bear interest at either a base rate plus the base rate margin, or a Eurodollar rate, for the applicable period, plus, the Eurodollar margin at the time of the borrowing. Letters of credit outstanding under the Tesoro Corporation Revolving Credit Facility and the TPSA Revolving Credit Facility incur fees at the Eurodollar margin rate and the base rate margin, respectively.

Tesoro Corporation Revolving Credit Facility (“Revolving Credit Facility”)

At March 31, 2012, our Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base of approximately $3.5 billion, consisting of Tesoro's eligible cash and cash equivalents, receivables and petroleum inventories (based upon a West Texas Intermediate crude oil price of $107 per barrel), net of the standard reserve as defined, or the Revolving Credit Facility's total capacity of $1.85 billion. The total available capacity can be increased up to an aggregate amount of $2.25 billion, subject to receiving increased commitments. As of March 31, 2012, we had unused credit availability of approximately 44% of the eligible borrowing base.

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The Revolving Credit Facility is guaranteed by substantially all of Tesoro's active domestic subsidiaries, excluding TLGP and TLLP and its subsidiaries, and is secured by substantially all of the crude oil and refined product inventories, cash and receivables of Tesoro's active domestic subsidiaries. TPSA is also not a guarantor of the Revolving Credit Facility.

Borrowing availability under the Revolving Credit Facility is based on a minimum fixed charge coverage ratio. In addition, we have a default covenant, which requires us to maintain specified levels of tangible net worth. We were in compliance with our debt covenants as of and for the three months ended March 31, 2012.

Our committed Revolving Credit Facility is scheduled to mature on March 16, 2016. The Revolving Credit Facility will terminate if the Company does not (a) refinance or pay in full, the Company's 6 1/4% notes due November 2012 on or prior to the stated maturity date, or (b) refinance or pay in full, the Company's 6 5/8% notes due November 2015 on or prior to the stated maturity date.

Letter of Credit Agreements

The Revolving Credit Facility allows us to obtain letters of credit under separate letter of credit agreements for foreign crude oil purchases. As of March 31, 2012, our four separate uncommitted letter of credit agreements had $445 million outstanding. Letters of credit outstanding under these agreements incur fees and are secured by the petroleum inventories for which they are issued. Capacity under these letter of credit agreements is available on an uncommitted basis, and can be terminated by either party, at any time.

TPSA Revolving Credit Facility

As part of our business strategy, we formed TPSA, a directly and wholly owned subsidiary of Tesoro, to further utilize our leased pipeline and tank facilities in Panama. In October 2011, TPSA amended and restated its 364-day uncommitted, secured revolving credit agreement. TPSA is an unrestricted subsidiary under our outstanding indentures. The TPSA Revolving Credit Facility is non-recourse to Tesoro and is guaranteed by TPSA's assets. The TPSA Revolving Credit Facility includes two uncommitted facilities, which provide for revolving borrowings, swing line loans and daylight overdraft loans and letters of credit. The TPSA Revolving Credit Facility is scheduled to mature in October 2012.

The maximum capacity of these facilities as of March 31, 2012, was $500 million, consisting of $350 million under the first facility and $150 million under the second facility. Our total capacity under the TPSA facilities can be further increased up to $700 million provided the facilities' maximum amounts do not exceed $550 million and $350 million, respectively. At March 31, 2012, our TPSA Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base consisting of TPSA eligible receivables and petroleum inventories, net of reserves, or the agreement's capacity based on the net worth of TPSA. We had $90 million in borrowings outstanding under this agreement and letters of credit outstanding of $38 million at March 31, 2012. During the 2012 Quarter, we reduced our borrowings under this facility by $27 million.

The TPSA Revolving Credit Facility contains certain default covenants and conditions relative to TPSA's financial results that, among other things, limit TPSA's ability to incur indebtedness or carry inventory levels above certain defined maximums. TPSA is also required to maintain specified levels of adjusted tangible net worth (as defined), and adjusted net working capital (as defined). We were in compliance with all TPSA Revolving Credit Facility covenants and conditions as of and for the three months ended March 31, 2012.

TLLP Revolving Credit Facility

TLLP amended the TLLP Revolving Credit Facility effective March 30, 2012. Concurrent with the execution of the amendment, and pursuant to the terms of the original agreement, TLLP exercised its option to increase the total loan availability under the TLLP Credit Agreement from $150 million to an aggregate of $300 million. The amendment allows TLLP to request that the availability be increased up to an aggregate of $450 million, subject to receiving increased commitments from the lenders, compared to the original agreement which allowed an aggregate capacity of $300 million. TLLP had $50 million in borrowings outstanding under this facility at March 31, 2012. On April 2, 2012, TLLP borrowed $68 million on the TLLP Revolving Credit Facility and distributed $67.5 million to us, for the contribution of the Martinez Crude Oil Marine Terminal discussed above in "Business Strategy and Overview."

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The TLLP Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of TLLP's subsidiaries and secured by substantially all of TLLP's assets. Borrowings available under the TLLP Revolving Credit Facility are up to the total available revolving capacity of the facility. The TLLP Revolving Credit Facility is scheduled to mature on April 25, 2014.

The TLLP Revolving Credit Facility contains affirmative and negative covenants that, among other things, limit or restrict TLLP's ability (as well as those of TLLP's subsidiaries) to:

• incur additional indebtedness and incur liens on assets to secure certain debt;

• pay and make certain restricted payments;

• make distributions from its subsidiaries;

• dispose of assets unless the proceeds from those sales are used to repay debt or are reinvested in its business;

• make certain amendments, modifications or supplements to organization documents and material contracts;

• engage in certain business activities;

• engage in certain mergers or consolidations and transfers of assets; and

• enter into transactions with affiliates.

Additionally, covenants require TLLP to maintain certain interest coverage and leverage ratios. We were in compliance with all TLLP Revolving Credit Facility covenants and conditions as of March 31, 2012.

Capitalization

Our capital structure at March 31, 2012, was comprised of the following (in millions):

Debt, including current maturities:
Tesoro Corporation Revolving Credit Facility	$	—
TPSA Revolving Credit Facility	90
TLLP Revolving Credit Facility	50
6¼% Senior Notes Due 2012	299
65/8% Senior Notes Due 2015	450
6½% Senior Notes Due 2017	473
9¾% Senior Notes Due 2019 (net of unamortized discount of $9 million)	291
Capital lease obligations and other	21
Total Debt	1,674
Stockholders' Equity	4,049
Total Capitalization	$	5,723

At March 31, 2012, our debt to capitalization ratio had decreased to 29% compared to 30% at year-end 2011, reflecting earnings during the first three months of 2012, and a $27 million reduction in outstanding borrowings due to repayments on the TPSA Revolving Credit Facility.

From time to time, we may purchase our Senior Notes in the open market or in privately negotiated transactions. The timing and amount of repurchases, if any, will depend on available cash, market conditions and other considerations.

Anti-dilutive Share Buy-Back Program

During 2011, our Board of Directors approved a program designed to offset the dilutive effect of future stock-based compensation awards. We entered into a program to purchase approximately 1 million shares during 2012 to offset the impact of 2012 stock-based compensation awards grants.  We purchased 321,000 shares of common stock at a weighted average price of $28.22 per share for approximately $9 million during the three months ended March 31, 2012, for this program.

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Cash Flow Summary

Components of our cash flows are set forth below (in millions):

	Three Months Ended
	March 31,
	2012			2011
Cash Flows From (Used in):
Operating activities	$	(15	)	$	211
Investing activities	(148		)	(48		)
Financing activities	(27		)	(87		)
Increase (Decrease) in Cash and Cash Equivalents	$	(190	)	$	76

Net cash used in operating activities during the 2012 Quarter totaled $15 million, as compared to net cash from operating activities of $211 million in the 2011 Quarter. The significant decrease in net cash from operating activities of $226 million was primarily due to lower cash earnings and an increase in turnaround spending attributable to the turnaround during the 2012 Quarter at our Martinez refinery. Net cash used in investing activities increased $100 million to $148 million in the 2012 Quarter as compared to $48 million in the 2011 Quarter due to increased capital expenditures and the acquisition of 49 retail stations during the 2012 Quarter. Net cash used in financing activities during the 2012 Quarter totaled $27 million as compared to $87 million in the 2011 Quarter. In the 2012 Quarter and 2011 Quarter we reduced our borrowings under the TPSA Revolving Credit Facility by $27 million and $70 million, respectively. The decrease in payments under the TPSA Revolving Credit Facility along with higher financing costs related to our revolving credit facilities in the 2011 Quarter resulted in a decrease of net cash used in financing activities of $60 million.

Working capital (excluding cash) increased $127 million in the quarter ending March 31, 2012, primarily related to significant increases in crude oil and product prices, which impact inventory values, related payables and trade receivables. Additionally, refining feedstock inventory barrels increased by approximately 6% from December 31, 2011, in preparation for seasonally high demand periods during the summer months. The increase in working capital (excluding cash) was also driven by net repayments of $27 million of short-term borrowings on the TPSA Revolving Credit Facility.

Capital Expenditures

The projected cost estimates for the capital expenditures, including environmental projects, described below are subject to further review and analysis and permitting requirements. The amounts exclude estimates for capitalized interest and labor costs, however, actual spending amounts below include capitalized interest and labor costs. Our 2012 expected capital spending is $670 million, which includes the following significant projects:

Los Angeles Refinery. We intend to replace the vacuum distillation unit at our Los Angeles refinery. The capital investment for the unit upgrade is expected to be approximately $40 million, of which, approximately $7 million was spent in the first quarter of 2012. The project is currently scheduled to be completed in the fourth quarter of 2012.

Martinez Refinery. We intend to make capital improvements to our Avon marine wharf facility. The upgraded facility will allow us to maintain our ability to move products from our refinery, thus supporting higher utilization of our refining assets. The project cost is approximately $125 million. The project is expected to be completed in 2015.

North Dakota Refinery. We expect to complete a capital project to expand the crude oil throughput capacity of the Mandan, North Dakota refinery from 58 Mbpd to 68 Mbpd in the second quarter of 2012. The current expected capital investment for the expansion, is expected to be approximately $35 million, of which $6 million was spent in the first quarter of 2012. The expansion will allow the refinery to process additional crude from the nearby Bakken Shale/Williston Basin area delivered via the TLLP High Plains System. We also intend to spend approximately $35 million to expand the diesel desulfurization unit from 17 Mbpd to 22 Mbpd. We expect to complete the project in the third quarter of 2013.

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Washington Refinery. We have planned capital expenditures for an unloading facility at the Washington refinery to accommodate a unit train. This facility will allow the supply of crude oil from the Bakken Shale/Williston Basin region in North Dakota to our Washington refinery. We expect to offer the unit train unloading facility to TLLP. The construction of the facility is expected to be completed by the end of September 2012. We expect to spend approximately $65 million on this project, of which $7 million was spent in the first quarter of 2012.

Utah Refinery. We intend to make capital improvements to our Salt Lake City, Utah refinery. The conversion project is designed to improve yields of gasoline and diesel, improve the flexibility of processing crude feedstocks, and increase throughput capacity by 4 Mbpd. The estimated capital expenditure is approximately $180 million, of which $3 million was spent during the first quarter of 2012. The conversion project is expected to be completed in two stages in 2013 and 2014.

Retail. Weexpect to spend approximately $30 million to rebrand retail stations in southern California leased from Thrifty Oil Co. and certain of its affiliates, which are expected to be phased in during 2012 and 2014. We expect to spend $23 million related to the rebranding of approximately 175 of these stations in 2012.

We completed the acquisition of 49 retail stations in the first quarter of 2012. We paid approximately $37 million for the assets, including inventories of approximately $3 million. We have spent approximately $4 million to replace the dispensers at these stations and expect to spend approximately $5 million to rebrand the stations, of which $3 million was spent through March 31, 2012.

Environmental Capital Expenditures

The EPA issued regulations in February 2007 that require the reduction of benzene in gasoline. We expect to spend approximately $10 million through the second quarter of 2012 at our Alaska, Hawaii and Utah refineries to comply with the regulations, including $6 million spent in the first quarter of 2012. The project at our Utah refinery was completed at the end of the first quarter of 2012. Our California refineries do not require capital spending to meet the benzene reduction standards.

Capital spending during the 2012 Quarter was $102 million. Our 2012 Quarter and 2012 full-year expected capital spending amounts are comprised of the following project categories:

	Percent of 2012 Quarter Capital Spending	Percent of 2012 Expected Capital Spending
Project Category
Regulatory	21%	15%
Sustaining	21%	25%
Income Improvement	58%	60%

Refinery Turnaround Spending

We spent $126 million for refinery turnarounds and catalysts during the 2012 Quarter, primarily at our Martinez refinery. During the remainder of 2012, we expect to spend approximately $175 million, primarily at our Alaska, Hawaii and Los Angeles refineries. Refining throughput and yields will be affected by scheduled turnarounds at our Alaska and Hawaii refineries during the second quarter of 2012.

Off-Balance Sheet Arrangements

We have not entered into any transactions, agreements or other contractual arrangements that would result in off-balance sheet liabilities.

Environmental and Other Matters

We are a party to various litigation and contingent loss situations, including environmental and income tax matters, arising in the ordinary course of business. Although we cannot predict the ultimate outcomes of these matters with certainty, we have accrued for the estimated liabilities, when appropriate. We believe that the outcome of these matters will not have a material impact on our liquidity or financial position, although the resolution of certain of these matters could have a material impact on our interim or annual results of operations. Additionally, if applicable, we accrue receivables for probable insurance or other third-party recoveries.

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We are subject to extensive federal, state and local environmental laws and regulations. These laws, which change frequently, regulate the discharge of materials into the environment and may require us to remove or mitigate the environmental effects of the disposal or release of petroleum or chemical substances at various sites, install additional controls, or make other modifications to certain emission sources, equipment or facilities.

Future expenditures may be required to comply with the Clean Air Act and other federal, state and local requirements for our various sites, including our refineries, tank farms, pipelines, operating retail stations, closed retail stations, operating refined-products terminals and closed refined products terminals. The impact of these legislative and regulatory developments, including any greenhouse gas cap-and-trade program or low carbon fuel standards, could result in increased compliance costs, additional operating restrictions on our business and an increase in the cost of the products we manufacture, which could have a material adverse impact on our consolidated financial position, results of operations and liquidity.

In 2009, the EPA proposed regulating greenhouse gas emissions under the Clean Air Act. The first of these regulations, finalized on April 1, 2010, sets standards for the control of greenhouse gas emissions from light trucks and cars. It could reduce the demand for our manufactured transportation fuels. In addition, other finalized regulations include permitting requirements for stationary sources that emit greenhouse gases above a certain threshold. The resulting permitting requirements could impose emission controls that increase required capital expenditures at our refineries. We cannot currently predict its impact on our financial position, results of operations and liquidity.

In December 2007, the U.S. Congress passed the Energy Independence and Security Act that created a second Renewable Fuels Standard (“RFS2”). This standard requires the total volume of renewable transportation fuels (including ethanol and advanced biofuels) sold or introduced in the U.S. to reach 15.2 billion gallons in 2012 and to increase to 36 billion gallons by 2022. The requirements could reduce future demand growth for petroleum products that we manufacture. In the near term, the RFS2 presents ethanol production and logistics challenges for the ethanol, alternative fuel and refining and marketing industries. We are currently meeting the RFS2 requirements through a combination of blending renewable fuels and purchases of Renewable Identification Numbers in the open market. Additional expenditures could be required to logistically accommodate the increased use of renewable transportation fuels. We cannot currently predict its impact on our financial position, results of operations and liquidity.

In California, Assembly Bill 32 (“AB 32”) created a statewide cap on greenhouse gas emissions and requires that the state return to 1990 emissions levels by 2020. AB 32 focuses on using market mechanisms, such as a cap-and-trade program and a low carbon fuel standard (“LCFS”) to achieve emissions reduction targets. Although a court ruled the LCFS unconstitutional in January 2012, the California Air Resources Board has appealed the decision. On April 23, 2012 the U.S. 9^th Circuit Court of Appeals stayed the lower court's preliminary injunction of CARB's enforcement of the standard pending the appeal. The LCFS became effective in January 2010 and would have required a 10% reduction in the carbon intensity of gasoline and diesel fuel by 2020. Final regulations for all other aspects of AB 32, including cap-and-trade requirements, are being developed by the California Air Resources Board. These regulations should take effect in 2012 and are to be fully implemented by 2020. We cannot predict the ultimate outcome of the court's ruling on the LCFS and the implementation and implications of AB 32 will take many years to realize. Consequently, we cannot currently predict its impact on our financial position, results of operations and liquidity.

We are subject to extensive federal, state and foreign tax laws and regulations. Newly enacted tax laws and regulations, and changes in existing tax laws and regulations, could result in increased expenditures in the future. We are also subject to audits by federal, state and foreign taxing authorities in the normal course of business. It is possible that tax audits could result in claims against us in excess of recorded liabilities. We believe that resolution of any such claim(s) would not have a material impact on our financial position, results of operations and liquidity. We do not expect our unrecognized tax benefits to change significantly over the next twelve months.

Environmental Liabilities

We are incurring and expect to continue to incur expenses for environmental liabilities at a number of currently and previously owned or operated refining, pipeline, terminal and retail station properties. We have accrued liabilities for these expenses and believe these accruals are adequate based on current information and projections that can be reasonably estimated. Our environmental accruals are based on estimates including engineering assessments, and it is possible that our projections will change and that additional costs will be recorded as more information becomes available.

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At both March 31, 2012 and December 31, 2011, our accruals for environmental expenditures totaled $93 million. These accruals include $55 million for both periods, related to environmental liabilities for site cleanup activities assumed from a prior owner, arising from operations at our Martinez refinery prior to August 2000. Certain projects at the Martinez refinery are subject to a cost-share agreement where we are responsible for 75% of the expenditures. Approximately $46 million of our obligations are related to this agreement. We cannot reasonably determine the full extent of remedial activities that may be required at the Martinez refinery. Therefore, it is possible that we will identify additional investigation and remediation costs as more information becomes available. We have filed insurance claims under environmental insurance policies that provide coverage up to $190 million for expenditures in excess of $50 million in self-insurance, but the insurer has challenged coverage and filed a declaratory relief action in federal court. We have not recognized possible insurance recoveries related to this matter.

We have investigated conditions at certain active wastewater treatment units at our Martinez refinery.  The investigation was driven by an order received in 2004 from the San Francisco Bay Regional Water Quality Control Board. The order named us as well as two previous owners of the Martinez refinery.  We cannot currently estimate the amount of the ultimate resolution of the order, but we believe it will not have a material adverse impact on our financial position, results of operations or liquidity.

Washington Refinery Fire

In April 2010, the naphtha hydrotreater unit at our Washington refinery was involved in a fire, which fatally injured seven employees and rendered the unit inoperable. Subsequent to the incident, refinery processing was temporarily shut down until the unit reconstruction was completed. The Washington refinery resumed operations at planned rates in November 2010.

In February 2011, Tesoro Corporation, Tesoro Refining and Marketing Company and other defendants were named in a lawsuit brought by the estates and families of the seven fatally injured employees arising from the April 2010 incident at our Washington refinery. In addition, a third-party truck driver has alleged damages in the lawsuit. The lawsuit includes allegations of negligence, premises liability, strict liability, product liability and seeks unspecified compensatory and punitive damages. This case, Donald and Peggy Zimmerman et al. v. Tesoro Corporation and Tesoro Refining and Marketing et al., is proceeding in the Superior Court of the State of Washington, Skagit County. The Company believes that it has defenses to the allegations contained in the lawsuit. While we cannot currently estimate the amount or timing of the resolution of this matter, and currently believe that the outcome of this matter will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations.

We maintain comprehensive property (including business interruption), workers' compensation, and general liability insurance policies with significant loss limits. Our business interruption insurance deductible is satisfied after we have exceeded both 60 days of operational disruption and $25 million in losses primarily based on the operating plan that existed prior to the incident.

We have filed business interruption insurance claims related to this incident. We collected $87 million in business interruption insurance recoveries in 2010 and 2011, that relate to downtime from the incident, which were recorded as an offset to cost of sales in the consolidated statement of operations. As of March 31, 2012, certain business interruption claims remain open.

Other Matters

In the ordinary course of business, we become party to lawsuits, administrative proceedings and governmental investigations, including environmental, regulatory and other matters. Large, and sometimes unspecified, damages or penalties may be sought from us in some matters. We have not established accruals for these matters unless a loss is probable and the amount of loss is currently estimable. On the basis of existing information, we believe that the resolution of these matters, individually or in the aggregate, will not have a material adverse impact on our financial position, results of operations or liquidity.

In October 2011, MF Global Holding Ltd. (“MF Global”), a broker-dealer we used for derivatives transactions, announced filing under Chapter 11 of the U.S. Bankruptcy Code with the United States Bankruptcy court for the Southern District of New York. We ceased doing business with MF Global and liquidated all accounts during 2011. However, as of March 31, 2012, we had cash collateral remaining with them of approximately $24 million. We cannot currently estimate the amount or timing of the resolution of this matter.

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On July 21, 2010, the Dodd-Frank Wall Street Reform and Consumer Protection Act, also known as the Financial Reform Act of 2010, was signed into law. Key provisions of the act require that standardized swaps be cleared through a registered clearinghouse and executed on a registered trading platform with specific margin requirements. These requirements could make these products more complicated or costly by creating new regulatory risks and increasing reporting, capital, and administrative requirements for companies that use derivatives for hedging and trading activities. Final rules implementing this statute were approved by the Commodity Futures Trading Commission on October 19, 2011, and are expected to be effective in mid-2012, subject to potential legal challenge. Although we cannot predict the ultimate impact of these rules, and currently believe that the outcome will not have a material impact our liquidity or financial position, the final rules may result in increased hedging costs and cash collateral requirements, which could have a material impact on our interim or annual results of operations.

Legal

During 2009, Chevron filed a lawsuit against us claiming they are entitled to a share of the refunds we received in 2008 from the owners of the Trans Alaska Pipeline System (“TAPS”). We received $50 million in 2008, net of contingent legal fees, for excessive intrastate rates charged by TAPS during 1997 through 2000, and the period of 2001 through June 2003. Chevron is asserting that it is entitled to a share of its portion of the refunds for retroactive price adjustments under our previous crude oil contracts with them. The trial court judge granted Chevron's motion for summary judgment and awarded them $16 million, including interest in September 2010. We disagree with the trial court and have appealed the decision to the Alaska Supreme Court in which the proceeding is now pending. We have established an accrual for this matter and believe that the outcome will not have a material impact on our financial position, results of operations or liquidity.

We are a defendant, along with other manufacturing, supply and marketing defendants, in three remaining lawsuits alleging methyl tertiary butyl ether (“MTBE”)contamination in groundwater. The defendants are being sued for having manufactured MTBE and having manufactured, supplied and distributed gasoline containing MTBE. The plaintiffs in the remaining cases, all in California, are municipalities and governmental authorities. The plaintiffs allege, in part, that the defendants are liable for manufacturing or distributing a defective product. The suits generally seek individual, unquantified compensatory and punitive damages and attorney's fees. We intend to vigorously assert our defenses against these claims. While we cannot currently estimate the amount or timing of the resolution of this matter, we have established an accrual for this matter and believe that the outcome will not have a material impact on our financial position, results of operations or liquidity.

Environmental

The EPA has alleged that we have violated certain Clean Air Act regulations at our Alaska, Washington, Martinez, Hawaii and Utah refineries. We are continuing discussions of the EPA's claims with the EPA and the U.S. Department of Justice (“DOJ”). We previously received a notice of violation (“NOV”) in March 2011 from the EPA alleging violations of Title V of the Clean Air Act at our Alaska refinery. The alleged violations in the NOV arise from a 2007 state of Alaska inspection and inspections by the EPA in 2008 and 2010. We also previously received NOV's in 2005 and 2008 alleging violations of the Clean Air Act at our Washington refinery. We are evaluating all of these allegations. The ultimate resolution of these matters could require us to incur material capital expenditures and/or civil penalties. While we cannot currently estimate the amount or timing of the resolution of these matters, and currently believe that the outcome of these matters will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations.

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IMPORTANT INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q (including information incorporated by reference) includes and references “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These statements relate to, among other things, expectations regarding refining margins, revenues, cash flows, capital expenditures, turnaround expenses and other financial items. These statements also relate to our business strategy, goals and expectations concerning our market position, future operations, margins and profitability. We have used the words “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will,” “would” and similar terms and phrases to identify forward-looking statements in this Quarterly Report on Form 10-Q, which speak only as of the date the statements were made.

Although we believe the assumptions upon which these forward-looking statements are based are reasonable, any of these assumptions could prove to be inaccurate and the forward-looking statements based on these assumptions could be incorrect.

The matters discussed in these forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results and trends to differ materially from those made, projected, or implied in or by the forward-looking statements depending on a variety of uncertainties or other factors including, but not limited to:

• the constantly changing margin between the price we pay for crude oil and other refinery feedstocks, and the prices at which we are able to sell refined products;

• the timing and extent of changes in commodity prices and underlying demand for our refined products;

• changes in global economic conditions and the effects of the global economic downturn on our business, especially in California, and the business of our suppliers, customers, business partners and credit lenders;

• the availability and costs of crude oil, other refinery feedstocks and refined products;

• changes in fuel and utility costs for our facilities;

• changes in the cost or availability of third-party vessels, pipelines and other means of transporting crude oil feedstocks and refined products;

• actions of customers and competitors;

• state and federal environmental, economic, health and safety, energy and other policies and regulations, including those related to climate change and any changes therein, and any legal or regulatory investigations, delays or other factors beyond our control;

• adverse rulings, judgments, or settlements in litigation or other legal or tax matters, including unexpected environmental remediation costs in excess of any reserves;

• operational hazards inherent in refining operations and in transporting and storing crude oil and refined products;

• earthquakes or other natural disasters affecting operations;

• changes in our cash flow from operations;

• changes in capital requirements or in execution of planned capital projects;

• changes in our inventory levels and carrying costs;

• disruptions due to equipment interruption or failure at our facilities or third-party facilities;

• direct or indirect effects on our business resulting from actual or threatened terrorist incidents or acts of war;

• weather conditions affecting our operations or the areas in which our refined products are marketed; 

• seasonal variations in demand for refined products;

• risks related to labor relations and workplace safety; and

• political developments.

Many of these factors, as well as other factors, are described in our filings with the Securities and Exchange Commission (“SEC”).

All future written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the previous statements. The forward-looking statements in this Quarterly Report on Form 10-Q speak only as of the date of this Quarterly Report on Form 10-Q. We undertake no obligation to update any information contained herein or to publicly release the results of any revisions to any forward-looking statements that may be made to reflect events or circumstances that occur, or that we become aware of, after the date of this Quarterly Report on Form 10-Q.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our primary source of market risk is the difference between the prices we sell our refined products for and the prices we pay for crude oil and other feedstocks. We use derivative instruments to manage the risks from changes in the prices of crude oil and refined products, fluctuations in foreign currency exchange rates, or to capture market opportunities. We have a risk committee whose responsibilities include reviewing a quarterly assessment of risks to the corporation and presenting a quarterly risk update to executive management for consideration.

Commodity Price Risks

Our earnings and cash flows from operations depend on the margin, relative to fixed and variable expenses (including the costs of crude oil and other feedstocks), at which we are able to sell our refined products. The prices of crude oil and refined products have fluctuated substantially in recent years and depend on many factors. These factors include the global supply and demand for crude oil and refined products. This demand is impacted by changes in the global economy, the level of foreign and domestic production of crude oil and refined products, geo-political conditions, the availability of imports of crude oil and refined products, the relative strength of the U.S. dollar, the marketing of alternative and competing fuels and the impact of government regulations. The prices we sell our refined products for are also affected by local factors such as local market conditions and the level of operations of other suppliers in our markets.

Prices for refined products are influenced by the price of crude oil. Generally, an increase or decrease in the price of crude oil results in a corresponding increase or decrease in the price of gasoline and other refined products. The timing, direction and the overall change in refined product prices versus crude oil prices will impact profit margins and could have a significant impact on our earnings and cash flows. Assuming all other factors remained constant, a $1 per barrel change in average gross refining margins, based on our rolling 12-month average throughput of 571 thousand barrels per day (“Mbpd”), would change annualized pre-tax operating income by approximately $208 million.

We maintain inventories of crude oil, intermediate products and refined products, the values of which are subject to fluctuations in market prices. Our inventories of refinery feedstocks and refined products totaled 31 million barrels at both March 31, 2012 and December 31, 2011. The average cost of our refinery feedstocks and refined products at March 31, 2012, was approximately $52 per barrel on a last-in, first-out (“LIFO”) basis, compared to market prices of approximately $129 per barrel. If market prices decline to a level below the LIFO average cost of these inventories, we would be required to write down the carrying value of our inventory to market.

We use non-trading derivative instruments to manage exposure to commodity price risks associated with the purchase or sale of crude oil and finished products. We also use non-trading derivative instruments to manage price risks associated with inventories above or below our target levels. These derivative instruments typically involve exchange-traded futures and over-the-counter swaps, and physical commodity forward purchase and sale contracts, generally with durations of less than two years. Our hedging strategies are continuously monitored.

We mark-to-market our derivative instruments and recognize the changes in their fair value in our statements of consolidated operations. With the exception of a portion of our Tesoro Panama Company S.A. (“TPSA”) inventory, we elected not to designate derivative instruments as fair value hedges during the three months ended March 31, 2012 and 2011. We use fair value hedge accounting for a portion of our TPSA inventory.

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Net earnings during the 2012 and 2011first quarters included a net loss of $21 million and $51 million, respectively, on our commodity derivative positions comprised of the following (dollars in millions and volumes in millions of barrels):

	Three Months Ended
	March 31,
	2012				2011
	Contract Volumes	Net Gain (Loss)			Contract Volumes	Net Gain (Loss)
Unrealized gain carried on open derivative positions from prior period	4	$	38		5	$	11
Realized loss on settled derivative positions	91	(107		)	103	(18		)
Unrealized gain (loss) on open net short derivative positions	3	48			8	(44		)
Net Loss		$	(21	)		$	(51	)

_______

Note: This table includes derivative positions associated with crude oil hedges held by TPSA.

Our open positions at March 31, 2012, will expire at various times primarily during 2012 and 2013. We prepared a sensitivity analysis to estimate our exposure to market risk associated with our derivative instruments. This analysis may differ from actual results. Based on our open net positions of 3 million barrels at March 31, 2012, a $1.00 per-barrel change in quoted market prices of our derivative instruments, assuming all other factors remain constant, could change the fair value of our derivative instruments and pre-tax operating income by approximately $3 million.

Tesoro Panama Company S.A.

We formed TPSA to use our leased pipeline and tank facilities in Panama by enhancing strategic partnerships, developing economies of scale around freight and storage opportunities, providing discretionary crude oil trading, expanding global commercial relationships and evaluating opportunities to source crude from alternative supply markets. We may use our excess storage capacity in Panama to take advantage of contango markets when the price of crude oil is higher in the future than the current spot price. We use commodity derivatives to hedge crude oil held in connection with these arbitrage opportunities. The table above and sensitivity analysis includes approximately 1.9 million barrels in net open derivative positions at March 31, 2012, entered into to manage exposure to commodity price risks associated with TPSA.

We use fair value hedge accounting for certain derivative instruments acquired by TPSA and the crude oil inventories underlying these instruments. If we designate a hedging relationship as a fair value hedge, we record the changes in fair value of the hedged asset or liability and any ineffective portion in cost of sales in our statements of consolidated operations.

Risk Management

The Company has a system of governance and management oversight and has put in place a number of controls to ensure procedures are properly followed and accountability is present at the appropriate levels. For example, the Company has put in place controls designed to:

• create and maintain a comprehensive risk management policy;

• provide for authorization by the appropriate levels of management;

• provide for segregation of duties;

• maintain an appropriate level of knowledge regarding the execution of and the accounting for derivative instruments; and

• have key performance indicators in place to adequately measure the performance of its hedging activities.

The Company believes the governance structure that it has in place is adequate given the size and sophistication of its hedging program.

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Counterparty Credit Risk

We have exposure to concentrations of credit risk related to the ability of our counterparties to meet their contractual payment obligations, and the potential non-performance of counterparties to deliver contracted commodities or services at the contracted price. We have risk management policies in place, and continue to monitor closely the status of our counterparties. We perform ongoing credit evaluations of our customers' financial condition, and in certain circumstances, require prepayments, letters of credit or other collateral.

Foreign Currency Risk

We are exposed to exchange rate fluctuations on our purchases of Canadian crude oil. We enter into forward contracts of Canadian dollars to manage monthly exchange rate fluctuations. We had a $1 million gain related to these transactions for the both the three months ended March 31, 2012 and 2011. As of March 31, 2012, we had a forward contract to purchase CAD $44 million that matured on April 25, 2012. Based on our open forward contract position, a $0.01 change in the Canadian dollar to U.S. dollar exchange rate would change operating income by less than $1 million.

Interest Rate Risk

We utilize fixed-rate long-term debt obligations and other borrowings, which are subject to market risk from changes in interest rates. Changes in interest rates affect the interest expense we incur on our variable-rate debt, and the fair value of our fixed-rate debt. These changes also affect the rates used to discount liabilities which could result in lower or higher accretion expense over time.  The fair value of our debt was estimated primarily using quoted market prices.  Both the carrying value and fair value of our debt at March 31, 2012, were approximately $1.7 billion. The carrying value and fair value of our debt at December 31, 2011, were approximately $1.7 billion and $1.8 billion, respectively. We currently do not use interest rate swaps to manage our exposure to interest rate risk, however we continue monitor the market and our exposure, and in the future, we may enter into these transactions to mitigate risk. We believe in the short-term we have acceptable interest rate risk and continue to monitor the risk on our long-term obligations.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

We carried out an evaluation required by the Securities Exchange Act of 1934, as amended (“the Exchange Act”), under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) under the Exchange Act as of the end of the period. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effective. Our disclosure controls and procedures are designed to provide reasonable assurance that the information that we are required to disclose in reports we file under the Exchange Act is accumulated and communicated to management, as appropriate.

During the quarter ended March 31, 2012, there have been no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II — OTHER INFORMATION

ITEM 1.LEGAL PROCEEDINGS

In the ordinary course of business, we become party to lawsuits, administrative proceedings and governmental investigations, including environmental, regulatory and other matters. Large, and sometimes unspecified, damages or penalties may be sought from us in some matters and certain matters may require years to resolve. Although we cannot provide assurance, we believe that an adverse resolution of the matters described below will not have a material adverse impact on our consolidated financial position, results of operations or liquidity. The information below describes new proceedings or material developments in proceedings that we previously reported in our annual report on Form 10-K for the year ended December 31, 2011.

In March 2012, we received an offer from the U.S. Environmental Protection Agency (“EPA”) to settle alleged violations of the Renewable Fuel Standards (“RFS2”) for $321,000. The allegations relate to our use of renewal identification numbers (“RINs”) that EPA has alleged were fraudulently generated by third parties. We acquired the RINs from third parties to meet our 2010 renewable volumetric obligations to comply with the standard. We believe we have defenses to the allegations and are continuing to pursue a resolution of this matter with the EPA.

We are a defendant, along with other manufacturing, supply and marketing defendants, in three remaining lawsuits alleging methyl tertiary butyl ether (“MTBE”) contamination in groundwater. The defendants are being sued for having manufactured MTBE and having manufactured, supplied and distributed gasoline containing MTBE. The plaintiffs in the remaining cases, all in California, are municipalities and governmental authorities. The plaintiffs allege, in part, that the defendants are liable for manufacturing or distributing a defective product. The suits generally seek individual, unquantified compensatory and punitive damages and attorney's fees. We intend to vigorously assert our defenses against these claims. While we cannot currently estimate the amount or timing of the resolution of this matter, we have established an accrual for this matter and believe that the outcome will not have a material impact on our financial position, results of operations or liquidity.

The names of the courts in which the remaining proceedings are pending and the date instituted are as follows:

Name of Case	Name of Court where proceeding is pending	Date Instituted
City of Fresno v. Chevron USA Inc., et al., Tesoro Petroleum Corporation and Tesoro Refining and Marketing Company, Inc.	United States District Court of Southern District of New York	October 29, 2004
Orange County Water District v. Unocal Corporation et al., Tesoro Petroleum Corporation and Tesoro Refining and Marketing Company, Inc.	United States District Court of Southern District of New York	October 28, 2004
Great Oaks Water Company v. USA Petroleum Corporation, et al., Tesoro Corporation and Tesoro Refining and Marketing Company	Superior Court of California, County of Santa Clara	January 4, 2010

During the first quarter of 2012 we agreed to settle a NOV received from the California State Water Quality Control Board in November 2011, alleging violations of the California Health and Safety Code as a result of a release of naphtha from a tank at our Los Angeles refinery. To settle this matter we have agreed to pay $441,000 pending negotiation of the terms of the settlement agreement.

ITEM 1A.RISK FACTORS

There have been no significant changes from the risk factors previously disclosed in Item 1A of our 2011 Annual Report on Form 10‑K, other than the changes noted below:

Meeting the requirements of evolving environmental, health and safety laws andregulations including those related to climate change could adversely affect ourperformance.

Consistent with the experience of other U.S. refiners, environmental laws and regulations have raised operating costs and require significant capital investments at our refineries. We believe that existing physical facilities at our refineries are substantially adequate to maintain compliance with existing applicable laws and regulatory requirements. However, we may be required to address conditions that may be discovered in the future and require a response. Also, potentially material expenditures could be required in the future as a result of evolving environmental, health and safety, and energy laws, regulations or requirements that may be adopted or imposed in the future. Future developments in federal and state laws and regulations governing environmental, health and safety and energy matters are especially difficult to predict.

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Currently, multiple legislative and regulatory measures to address greenhouse gas emissions (including carbon dioxide, methane and nitrous oxides) are in various phases of consideration, promulgation or implementation. These include requirements effective in January 2010 to report emissions of greenhouse gases to the EPA and proposed federal legislation and regulation as well as state actions to develop statewide or regional programs, each of which require or could require reductions in our greenhouse gas emissions. Requiring reductions in our greenhouse gas emissions could result in increased costs to (i) operate and maintain our facilities, (ii) install new emission controls at our facilities and (iii) administer and manage any greenhouse gas emissions programs, including acquiring emission credits or allotments.

Requiring reductions in our greenhouse gas emissions and increased use of renewable fuels could also decrease the demand for our refined products, and could have a material adverse effect on our business, financial condition and results of operations. For example:

• In California, Assembly Bill 32 (“AB 32”), created a statewide cap on greenhouse gas emissions and requires that the state return to 1990 emission levels by 2020. AB 32 also created a low carbon fuel standard which would require a 10% reduction in the carbon intensity of fuels by 2020. Although a California court determined that this standard is unconstitutional in January 2012, the California Air Resources Board has appealed the decision. On April 23, 2012, the U.S. 9^th Circuit Court of Appeals stayed the lower court's preliminary injunction of CARB's enforcement of the standard pending the appeal and we cannot predict the outcome of the pending appeal.

• The U.S. Congress passed the Energy Independence and Security Act in December 2007, that created a second renewable fuels standard (“RFS2”). This standard requires the total volume of renewable transportation fuels (including ethanol and advanced biofuels) sold or introduced in the U.S. to reach 15.2 billion gallons in 2012 and rise to 36 billion gallons by 2022.

• The EPA proposed regulations in 2009, that would require the reduction of emissions of greenhouse gases from light trucks and cars, and would establish permitting thresholds for stationary sources that emit greenhouse gases and require emissions controls for those sources. Promulgation of the final rule on April 1, 2010, has resulted in a cascade of related rulemakings by the EPA pursuant to the Clean Air Act relative to controlling greenhouse gas emissions.

Our business may be negatively affected by work stoppages, slowdowns or strikes by our employees.

The collective bargaining agreements for our approximately 1,350 hourly represented employees expired in 2012. We have been engaged in negotiations with United Steelworkers (“USW”) local representatives, which resulted in ratification of the agreements covering approximately 270 employees at our Kapolei, Hawaii and Salt Lake City, Utah refineries. We are continuing negotiations with USW local representatives for hourly represented employees at our Anacortes, Washington; Mandan, North Dakota; Martinez, California and Los Angeles, California refineries and there is no assurance an agreement will be reached without a strike, work stoppage or other labor action at any of these locations. Any prolonged strike, work stoppage or other labor action at any of these locations could have an adverse effect on our financial condition or results of operations.

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ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The table below provides a summary of all purchases by Tesoro of its common stock during the three-month period ended March 31, 2012.

Period	Total Number of Shares Purchased*	Average Price Paid per Share
January 2012	—	$	—
February 2012	152,631	$	28.10
March 2012	237,957	$	28.38
Total	390,588

__________

* During 2011, our Board of Directors approved a program designed to offset the dilutive effect of future stock-based compensation awards. We entered into a program to purchase approximately 1 million shares during 2012 to offset the impact of 2012 stock-based compensation awards grants.  We purchased 321,000 shares of common stock for approximately $9 million during the three months ended March 31, 2012, for this program. The remaining shares were acquired from employees to satisfy tax withholding obligations in connection with the vesting of restricted stock issued to certain employees.

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ITEM 6. EXHIBITS

(a) Exhibits

Exhibit Number	Description of Exhibit
10.1	Contribution, Conveyance and Assumption Agreement, effective April 1, 2012, among Tesoro Logistics LP, Tesoro Logistics GP, LLC, Tesoro Logistics Operations LLC, Tesoro Corporation and Tesoro Refining and Marketing Company (incorporated by reference herein to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
*10.2	Amendment No. 1 to Omnibus Agreement, dated as of February 28, 2012, among Tesoro Corporation, Tesoro Refining and Marketing Company, Tesoro Companies, Inc., Tesoro Alaska Company, Tesoro Logistics LP and Tesoro Logistics GP, LLC.
10.3	Amended and Restated Omnibus Agreement, effective April 1, 2012, among Tesoro Corporation, Tesoro Refining and Marketing Company, Tesoro Companies, Inc., Tesoro Alaska Company, Tesoro Logistics LP and Tesoro Logistics GP, LLC (incorporated by reference herein to Exhibit 10.2 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
10.4	Amorco Marine Terminal Use and Throughput Agreement, effective April 1, 2012, between Tesoro Refining and Marketing Company and Tesoro Logistics Operations, LLC (incorporated by reference herein to Exhibit 10.3 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
10.5	Amendment No. 1 and Joinder to Credit Agreement, dated as of March 30, 2012, among Tesoro Logistics LP, certain subsidiaries of Tesoro Logistics LP party thereto, Bank of America, N.A., as administrative agent and L/C Issuer, and the lenders party thereto (incorporated by reference herein to Exhibit 10.4 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
*10.6	Terminal Expansion Agreement, dated as of February 27, 2012, between Tesoro Logistics Operations LLC and Tesoro Refining and Marketing Company.
*31.1	Certification by Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification by Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*32.1	Certification by Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification by Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**101.INS	XBRL Instance Document
**101.SCH	XBRL Taxonomy Extension Schema Document
**101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
**101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
**101.LAB	XBRL Taxonomy Extension Label Linkbase Document
**101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

___________________________

* Filed herewith.

** Submitted electronically herewith.

In accordance with Rule 402 of Regulation S-T, the XBRL information in Exhibit 101 to this Quarterly Report on Form 10-Q shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (Exchange Act), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

56

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		TESORO CORPORATION
Date:	May 3, 2012	/s/ GREGORY J. GOFF
		Gregory J. Goff
		President and Chief Executive Officer
		(Principal Executive Officer)
Date:	May 3, 2012	/s/ G. SCOTT SPENDLOVE
		G. Scott Spendlove
		Senior Vice President and Chief Financial Officer
		(Principal Financial Officer)

57

EXHIBIT INDEX

Exhibit Number	Description of Exhibit
10.1	Contribution, Conveyance and Assumption Agreement, effective April 1, 2012, among Tesoro Logistics LP, Tesoro Logistics GP, LLC, Tesoro Logistics Operations LLC, Tesoro Corporation and Tesoro Refining and Marketing Company (incorporated by reference herein to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
*10.2	Amendment No. 1 to Omnibus Agreement, dated as of February 28, 2012, among Tesoro Corporation, Tesoro Refining and Marketing Company, Tesoro Companies, Inc., Tesoro Alaska Company, Tesoro Logistics LP and Tesoro Logistics GP, LLC.
10.3	Amended and Restated Omnibus Agreement, effective April 1, 2012, among Tesoro Corporation, Tesoro Refining and Marketing Company, Tesoro Companies, Inc., Tesoro Alaska Company, Tesoro Logistics LP and Tesoro Logistics GP, LLC (incorporated by reference herein to Exhibit 10.2 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
10.4	Amorco Marine Terminal Use and Throughput Agreement, effective April 1, 2012, between Tesoro Refining and Marketing Company and Tesoro Logistics Operations, LLC (incorporated by reference herein to Exhibit 10.3 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
10.5	Amendment No. 1 and Joinder to Credit Agreement, dated as of March 30, 2012, among Tesoro Logistics LP, certain subsidiaries of Tesoro Logistics LP party thereto, Bank of America, N.A., as administrative agent and L/C Issuer, and the lenders party thereto (incorporated by reference herein to Exhibit 10.4 to the Company's Current Report on Form 8-K filed on April 3, 2012, File No. 1-3473).
*10.6	Terminal Expansion Agreement, dated as of February 27, 2012, between Tesoro Logistics Operations LLC and Tesoro Refining and Marketing Company.
*31.1	Certification by Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*31.2	Certification by Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
*32.1	Certification by Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
*32.2	Certification by Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
**101.INS	XBRL Instance Document
**101.SCH	XBRL Taxonomy Extension Schema Document
**101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
**101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
**101.LAB	XBRL Taxonomy Extension Label Linkbase Document
**101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

________________________

*
Filed herewith.

**

Submitted electronically herewith.

In accordance with Rule 402 of Regulation S-T, the XBRL information in Exhibit 101 to this Quarterly Report on Form 10-Q shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (Exchange Act), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

58

EX-10.2

Exhibit 10.2

AMENDMENT NO. 1 TO

OMNIBUS AGREEMENT

This Amendment No. 1, dated as of February 28, 2012 (this "Amendment"), to that certain Omnibus Agreement, dated as of April 26, 2011 (the "Omnibus Agreement"), by and among the parties thereto, is hereby adopted, executed and agreed to by and among Tesoro Corporation ("Tesoro"), Tesoro Refining and Marketing Company, Tesoro Companies, Inc., Tesoro Alaska Company, Tesoro Logistics LP, and Tesoro Logistics GP, LLC (each a "Party" and, collectively, the "Parties"). Capitalized terms used but not defined herein shall have the respective meanings given to such terms in the Omnibus Agreement.

WHEREAS, the Parties desire to amend the Omnibus Agreement in the manner herein provided in order to reflect the original intent of the Parties with respect to the allocation of certain severance and change-of-control benefits; and

WHEREAS, Section 9.5 of the Omnibus Agreement provides that the Omnibus Agreement may be amended or modified from time to time only by written agreement of all the Parties.

NOW, THEREFORE, in consideration of the premises contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

SECTION 1.Amendment to the Omnibus Agreement.

(a)The introductory portion of Section 4.1(c) of the Omnibus Agreement is hereby amended and restated in its entirety as follows:

"(c) The Partnership Group shall reimburse Tesoro for all other direct or allocated costs and expenses incurred by Tesoro and its Affiliates on behalf of the Partnership Group, including, but not limited to the following; provided, however, that the costs and expenses described in subsections (i) through (vi) below shall not apply with respect to employees of the General Partner, Tesoro or its Affiliates that are providing the services listed on Schedule IV:"

(b)Section 4.1(c)(ii) of the Omnibus Agreement is hereby amended and restated in its entirety as follows:

"(ii) except as otherwise provided in Section 4.1(c)(vi) below, the cost of employee benefits relating to employees of the General Partner, Tesoro or its Affiliates, including 401(k), pension, bonuses and health insurance benefits (but excluding Tesoro stock-based compensation expense), to the extent, but only to the extent, such employees perform services for the Partnership Group, provided that for employees that do not devote all of their business time to the Partnership Group, such expenses shall be based on the annual weighted average of time spent and number of employees devoting their services to the Partnership Group;"

(c)The following clause (vi) is hereby added to Section 4.1(c):

"(vi) any severance or similar amounts ("Severance Amounts") due to the President of the General Partner or the Vice President, Logistics of the General

Partner in the event of a Change of Control (or similar term, in each case as defined in the applicable management stability agreement) of Tesoro under the terms of their respective management stability agreements with Tesoro, provided that such reimbursement shall be based on the percentage of time spent by such employee on the business of the Partnership Group during the last completed payroll period immediately preceding the date of such Change of Control. Notwithstanding anything in this Agreement to the contrary, in no event will the Partnership Group reimburse Tesoro for, or otherwise in any way be responsible for, (A) any Severance Amounts due to any employee of the General Partner, Tesoro or its Affiliates (other than the President of the General Partner or the Vice President, Operations of the General Partner) in the event of a Change of Control (or similar term, in each case as defined in the applicable Employment Agreement) of Tesoro, or (B) any Tesoro stock-based compensation expense related to accelerated vesting of Tesoro equity awards. For the purposes of this Section 4.1(c)(vi), the term "Employment Agreement" shall include any employment agreement, management stability agreement or similar agreement between Tesoro and any employee of the General Partner, Tesoro or its Affiliates."

SECTION 2.Effective Date. Notwithstanding anything in this Amendment to the contrary, this Amendment is effective for all purposes as of the Closing Date.

SECTION 3.Effect of Amendment. Except as amended hereby, the Omnibus Agreement shall remain in full force and effect as previously executed.

SECTION 4.Governing Law. This Amendment shall be governed by, and construed in accordance with, the laws of the State of Texas, excluding any conflicts-of-law rule or principle that might refer the construction or interpretation of this Amendment to the laws of another state.

SECTION 5.Counterparts. This Amendment may be executed in any number of counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same instrument. Delivery of an executed signature page of this Amendment by facsimile transmission or in portable document format (.pdf) shall be as effective as delivery of a manually executed counterpart hereof.

[Remainder of page intentionally left blank]

IN WITNESS WHEREOF, the Parties have executed this Amendment as of the date first above written.

TESORO CORPORATION

By:/s/ CHARLES S. PARRISH

Charles S. Parrish

Executive Vice President, General Counsel and Secretary

TESORO REFINING AND MARKETING COMPANY

By:/s/ CHARLES S. PARRISH

Charles S. Parrish

Executive Vice President and Secretary

TESORO COMPANIES, INC.

By:/s/ CHARLES S. PARRISH

Charles S. Parrish

Executive Vice President, General Counsel and Secretary

TESORO ALASKA COMPANY

By:/s/ CHARLES S. PARRISH

Charles S. Parrish

Executive Vice President, General Counsel and Secretary

[Signature Page to Amendment No. 1 to Omnibus Agreement]

TESORO LOGISTICS LP

By: Tesoro Logistics GP, LLC,

its general partner

By:/s/ PHILLIP M. ANDERSON

Phillip M. Anderson

President

TESORO LOGISTICS GP, LLC

By:/s/ PHILLIP M. ANDERSON

Phillip M. Anderson

President

[Signature Page to Amendment No. 1 to Omnibus Agreement]

EX-10.6

Exhibit 10.6

TERMINAL EXPANSION AGREEMENT

This Terminal Expansion Agreement is dated this 27th day of February, 2012, by and between Tesoro Logistics Operations LLC ("TLO") and Tesoro Refining and Marketing Company ("TRMC").

WHEREAS, TLO and TRMC are parties to a Master Terminalling Services Agreement (the "MTSA") dated April 26, 2011, under which TLO provides dedicated Terminalling Services for TRMC and Tesoro Alaska Company (collectively "Tesoro") at certain petroleum products Terminals specified in the MTSA;

WHEREAS, the MTSA provides for an aggregate Minimum Throughput Commitment of 100,000 bbls/day in any month for all the Terminals covered thereby, of which 7,600 bbls/day is the Stipulated Volume allocated to throughput through the Stockton Terminal;

WHEREAS, the Stockton Terminal is operating at its current maximum operating capacity and TRMC is the only party utilizing the Stockton Terminal;

WHEREAS, TRMC desires to have the operating capacity of the Stockton Terminal increased in order to allow TRMC to throughput more petroleum products at the Stockton Terminal;

WHEREAS, TLO is willing to undertake the capital project required to expand capacity at the Stockton Terminal, as set forth below, provided that the Minimum Throughput Commitment under the MTSA is increased to reflect the increased throughput capacity at such Terminal;

NOW THEREFORE, in order to facilitate the expansion of operating capacity at the Stockton Terminal, TLO and TRMC agree as follows;

1.TLO shall promptly commence and diligently pursue to completion the capital project internally referenced as TLO's Tank Build and Rack Refurbishment Project (the "Stockton Expansion Project"), which includes the following work to expand capacity at the Stockton Terminal:

(a)Construction of two product storage tanks totaling 90,000 bbls of shell capacity:

(i)one 55,000 bbl CARB REG tank, and

(ii)one 35,000 bbl CARB Diesel tank;

(b)Replacement of the Vapor Recovery Unit with one of greater capacity;

(c) Installation of supporting piping, pumping, electrical and control systems infrastructure;

(d)Conversion of loading rack from bi-directional to uni-directional bays; and

(e) Routing loading arms from bay two to bay one, as additive system will be expanded to new loading arms.

2.Completion of the work will be subject to TLO obtaining all required permits and to force majeure. The Stockton Expansion Project is currently scheduled to become operational by November 1, 2012, at which time the throughput capacity of the Stockton Terminal will be increased from 7,600 bbls/day to 18,000 bbls/day.

3.Upon completion of the Stockton Expansion Project, the MTSA will be amended as follows:

(a)The Stipulated Volume for the Stockton Terminal listed under Schedule C will be increased to 16,000/bbls/day, and the aggregate Minimum Throughput Commitment under the MTSA will be increased by 8,400 bbls/day. Thus, provided that there are no other changes in the Minimum Throughput Capacity related to changes in the Stipulated Volume of other Terminals, the Minimum Throughput Capacity under the MTSA will be increased to 108,400 bbls/day.

(b)There shall be a specific commitment (the "Stockton Minimum Throughput Commitment") for TRMC to throughput at the Stockton Terminal a minimum volume of 13,600 barrels per day for each day in a Month, which will be supplemental to the overall Minimum Throughput Capacity for all Terminals subject to the MTSA, subject to the terms provided below.

(c)In any Month in which TRMC fails to throughput the Stockton Minimum Throughput Commitment at the Stockton Terminal, TRMC shall owe TLO the Stockton Shortfall Payment, which shall be the product of (i) the Stockton Throughput Fee (ii) times the difference between (A) the Stockton Minimum Throughput Commitment and (B) the actual throughput at the Stockton Terminal during such Month. {Stockton Shortfall Payment = Stockton Throughput Fee x (Stockton Minimum Throughput Commitment - actual Stockton throughput)}. The Stockton Throughput Fee shall be the applicable Throughput Fee listed on the first row of Schedule B to the MTSA, under the column heading Stockton, as it may be escalated as provided in the MTSA.

(d)The Stockton Shortfall Amount paid for any Month may be applied as credits to payment obligations of TRMC under the MTSA as follows:

(i)As a Credit against excess amounts (the "Stockton Excess Amount") owed by TRMC for volumes throughput at the Stockton Terminal in excess of the Stockton Minimum Throughput Commitment during the next succeeding three months, calculated in the same manner as is set forth in Section 7(b) of the MTSA, except that the Stockton Excess Amount shall be calculated by using the Stockton Throughput Fee rather than the weighted average Terminalling Service Fee for all Terminals, and

(ii)As an offset to any Shortfall Amounts owed under the MTSA for a failure to throughput the overall Minimum Throughput Commitment during the same Month for which the Stockton Shortfall Payment is owing, and

(iii)To the extent and only to the extent that the Stockton Shortfall Payment is applied as an offset against the overall Shortfall Payment under subparagraph (ii) above, as a Credit against future Excess Amounts owed by Tesoro during the next succeeding three Months, as provided in Section 7(b) of the MTSA.

4.TRMC and TLO agree to take all further steps necessary to implement the understandings reflected in this Terminal Expansion Agreement, including execution of an Amendment to the MTSA when the Stockton Expansion Project has been completed.

WITNESS our execution, effective as of the date stated above.

TESORO LOGISTICS OPERATIONS LLC

By: /s/ PHILLIP M. ANDERSON

Phillip M. Anderson

President

TESORO REFINING AND MARKETING COMPANY

By: /s/ GREGORY J. GOFF

Gregory J. Goff

President

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Gregory J. Goff, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Tesoro Corporation;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal controls over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this quarterly report based on such evaluation; and

(d) Disclosed in this quarterly report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 3, 2012	/s/ GREGORY J. GOFF
		Gregory J. Goff
		Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, G. Scott Spendlove, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Tesoro Corporation;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal controls over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this quarterly report based on such evaluation; and

(d) Disclosed in this quarterly report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	May 3, 2012	/s/ G. SCOTT SPENDLOVE
		G. Scott Spendlove
		Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Tesoro Corporation (the "Company") on Form 10-Q for the period ended March 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Gregory J. Goff, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15 (d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ GREGORY J. GOFF

Gregory J. Goff

Chief Executive Officer

May 3, 2012

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Tesoro Corporation (the "Company") on Form 10-Q for the period ended March 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, G. Scott Spendlove, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15 (d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ G. SCOTT SPENDLOVE

G. Scott Spendlove

Chief Financial Officer

May 3, 2012

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Tesoro Logistics LP, Contractual Terms Of Agreements With Tesoro Logistics LP (Details)			3 Months Ended
	Apr. 01, 2012	Mar. 31, 2012 pipelines terminals	Mar. 31, 2012 Various transportation, trucking, and services agreement [Domain] Y option	Mar. 31, 2012 High Plains transportation services agreement [Member] option Y	Mar. 31, 2012 Omnibus agreement with subsidiary [Member]
Long-term Purchase Commitment [Line Items]
Contribution date of Martinez Crude Oil Marine Terminal	4/1/2012
Number of refined products terminals		8
Number of short-haul pipelines		5
Agreement expiration dates			2016 through 2021
Long-term purchase commitment, description			5	5
Number of contract renewals			2	1
Omnibus or administrative fees received (in millions)					2.5

XML

Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Number of defined benefit plans sponsored	4
Pension Benefits [Member]
Pension and Other Postretirement Benefit Contributions [Abstract]
Employer contributions to employee retirement plan	$ 12
Components of Net Periodic Benefit Cost: [Abstract]
Service cost	7	7
Interest cost	7	7
Expected return on plan assets	(6)	(5)
Amortization of prior service credit	0	0
Recognized net actuarial loss	6	5
Recognized curtailment loss	0	2
Net Periodic Benefit Expense (Income)	14	16
Other Postretirement Benefits [Member]
Components of Net Periodic Benefit Cost: [Abstract]
Service cost	1	1
Interest cost	1	1
Expected return on plan assets	0	0
Amortization of prior service credit	(9)	(9)
Recognized net actuarial loss	3	3
Recognized curtailment loss	0	0
Net Periodic Benefit Expense (Income)	$ (4)	$ (4)

XML

Derivative Instruments, Derivative Gains and Losses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Derivatives Designated for Hedge Accounting [Member] | Commodity Futures Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 0	[1]	$ (1)	[1]
Amount of Loss Recognized In Income on Hedged Item	0	[1]	0	[1]
Amount of Loss Recognized in Income on Ineffective Portion of Derivative (b)	0	[1],[2]	(1)	[1],[2]
Mark-to-Market Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(20)		(49)
Mark-to-Market Derivatives [Member] | Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(10)		(16)
Mark-to-Market Derivatives [Member] | Cost of sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(11)		(34)
Mark-to-Market Derivatives [Member] | Interest, financing and other costs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	1		1
Mark-to-Market Derivatives [Member] | Commodity Futures Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(12)		(56)
Mark-to-Market Derivatives [Member] | Commodity OTC Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(6)		(1)
Mark-to-Market Derivatives [Member] | Commodity Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(3)		7
Mark-to-Market Derivatives [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 1		$ 1

[1] Losses recognized in income on the derivative and the hedged item are included in cost of sales in the statements of consolidated operations.

[2] For fair value hedges, no component of the derivative instruments' gains or losses was excluded from the assessment of hedge effectiveness. No amounts were recognized in income for hedged firm commitments that no longer qualify as fair value hedges.

XML

Commitments and Contingencies, Tax Matters (Details)	3 Months Ended
	Mar. 31, 2012
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Significant change in unrecognized tax matters	We do not expect our unrecognized tax benefits to change significantly over the next twelve months.

XML

Fair Value Measurements (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 D		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 28,000,000		$ 39,000,000
Total Liabilities	9,000,000		5,000,000
Cash collateral outstanding	18,000,000		75,000,000
Percent of trade receivables payables with balances outstanding	1.00%
Fair value adjustment to physical inventory	0		4,000,000
Days outstanding on trade receivables and payables	90
Carrying value of debt	1,700,000,000		1,700,000,000
Fair value of debt	1,700,000,000		1,800,000,000
Nonfinancial assets or liabilities measured at fair value	0
Commodity Futures Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	28,000,000		34,000,000
Total Liabilities	0		0
Commodity OTC Swap Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	0		1,000,000
Total Liabilities	2,000,000		1,000,000
Commodity Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets			4,000,000
Total Liabilities			1,000,000
RINs Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	7,000,000		3,000,000
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	174,000,000		86,000,000
Total Liabilities	168,000,000		130,000,000
Level 1 [Member] | Commodity Futures Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	174,000,000		86,000,000
Total Liabilities	168,000,000		130,000,000
Level 1 [Member] | Commodity OTC Swap Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0		0
Total Liabilities	0		0
Level 1 [Member] | Commodity Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset			0
Total Liabilities			0
Level 1 [Member] | RINs Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	0		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	8,000,000		16,000,000
Total Liabilities	13,000,000		13,000,000
Level 2 [Member] | Commodity Futures Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	7,000,000		9,000,000
Total Liabilities	3,000,000		6,000,000
Level 2 [Member] | Commodity OTC Swap Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,000,000		3,000,000
Total Liabilities	3,000,000		3,000,000
Level 2 [Member] | Commodity Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset			4,000,000
Total Liabilities			1,000,000
Level 2 [Member] | RINs Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	7,000,000		3,000,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0		0
Total Liabilities	0		0
Level 3 [Member] | Commodity Futures Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0		0
Total Liabilities	0		0
Level 3 [Member] | Commodity OTC Swap Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	0		0
Total Liabilities	0		0
Level 3 [Member] | Commodity Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset			0
Total Liabilities			0
Level 3 [Member] | RINs Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	0		0
Netting and Collateral (a) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	(154,000,000)	[1]	(63,000,000)	[1]
Total Liabilities	(172,000,000)	[1]	(138,000,000)	[1]
Netting and Collateral (a) [Member] | Commodity Futures Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	(153,000,000)	[1]	(61,000,000)	[1]
Total Liabilities	(171,000,000)	[1]	(136,000,000)	[1]
Netting and Collateral (a) [Member] | Commodity OTC Swap Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	(1,000,000)	[1]	(2,000,000)	[1]
Total Liabilities	(1,000,000)	[1]	(2,000,000)	[1]
Netting and Collateral (a) [Member] | Commodity Forward Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets			0	[1]
Total Liabilities			0	[1]
Netting and Collateral (a) [Member] | RINs Obligation [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Liabilities	$ 0	[1]	$ 0	[1]

[1] Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market derivative assets.

XML

Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Benefit Plans [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

The components of pension benefit expense and other postretirement benefit expense included in the condensed statements of consolidated operations for the three months ended March 31, 2012 and 2011, were (in millions):

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2012			2011			2012			2011
Service cost	$	7		$	7		$	1		$	1
Interest cost	7			7			1			1
Expected return on plan assets	(6		)	(5		)	—			—
Amortization of prior service credit	—			—			(9		)	(9		)
Recognized net actuarial loss	6			5			3			3
Recognized curtailment loss	—			2			—			—
Net Periodic Benefit Expense (Income)	$	14		$	16		$	(4	)	$	(4	)

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Commitments and Contingencies, Washington Refinery Fire (Details) (Washington Refinery Fire [Member], USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended	24 Months Ended
	Mar. 31, 2012 employees	Mar. 31, 2011	Jun. 30, 2010	Dec. 31, 2010	Dec. 31, 2011
Washington Refinery Fire [Member]
Washington Refinery Fire [Line Items]
Loss contingency, period of occurrence		2/1/2011	4/1/2010
Fines and penalties assessed				$ 2.4
Number of fatally injured employees in the refinery incident	7
Days of operational disruption	60
Losses incurred due to interruption	25
Insurance recoveries					$ 87

XML

Derivative Instruments Derivative Instruments (Policies)

3 Months Ended

Mar. 31, 2012

Derivative Instruments [Abstract]

Derivatives, Policy [Policy Text Block]

The accounting for changes in the fair value of a commodity derivative depends on whether the derivative has been designated in a hedging relationship and whether we have elected the normal purchases and normal sales exception. The accounting for the change in fair value can be summarized as follows:

Derivative Treatment	Accounting Method
Normal purchases and normal sales exception	Accrual accounting
Designated in qualifying hedging relationship	Hedge accounting
All other derivatives	Mark-to-market accounting

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Debt (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Tesoro Corporation Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Collateral	The Revolving Credit Facility is guaranteed by substantially all of Tesoro's active domestic subsidiaries, excluding Tesoro Logistics GP (“TLGP”) and TLLP and its subsidiaries, and is secured by substantially all of the crude oil and refined product inventories, cash and receivables of Tesoro's active domestic subsidiaries. TPSA is also not a guarantor of the Revolving Credit Facility.
Available borrowing capacity	$ 1,850,000,000
Letters of credit, amount outstanding	1,030,000,000
Maximum borrowing capacity	2,250,000,000
Adjusted borrowing base	3,500,000,000
West Texas Intermediate crude oil price	107
Unused credit availability	819,000,000
Remaining percentage of eligible borrowing base	44.00%
Expiration date	March 16, 2016
Line of credit facility, borrowing capacity, description	At March 31, 2012, our Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base of approximately $3.5 billion, consisting of Tesoro's eligible cash and cash equivalents, receivables and petroleum inventories (based upon a West Texas Intermediate crude oil price of $107 per barrel), net of the standard reserve as defined, or the Revolving Credit Facility's total capacity of $1.85 billion.
Tesoro Corporation Letter of Credit Agreements [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Collateral	Letters of credit outstanding under these agreements incur fees and are secured by the petroleum inventories for which they are issued.
Letters of credit, amount outstanding	445,000,000
Number of agreements	4
Tesoro Panama Company S.A. Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Collateral	TPSA is an unrestricted subsidiary under Tesoro's outstanding indentures. The TPSA Revolving Credit Facility is non-recourse to Tesoro and is guaranteed by TPSA's assets.
Available borrowing capacity	500,000,000
Letters of credit, amount outstanding	38,000,000
Maximum borrowing capacity	700,000,000
Line of credit facility, borrowing capacity, description	At March 31, 2012, our TPSA Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base consisting of TPSA eligible receivables and petroleum inventories, net of reserves, or the agreement's capacity based on the net worth of TPSA.
Length of Revolving Credit Facility	364
First facility [Member]
Line of Credit Facility [Line Items]
Available borrowing capacity	350,000,000
Maximum borrowing capacity	550,000,000
Second facility [Member]
Line of Credit Facility [Line Items]
Available borrowing capacity	150,000,000
Maximum borrowing capacity	350,000,000
Tesoro Logistics LP Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Collateral	The TLLP Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of TLLP’s subsidiaries and secured by substantially all of TLLP's assets.
Available borrowing capacity	300,000,000	150,000,000
Maximum borrowing capacity	450,000,000	300,000,000
Expiration date	April 25, 2014
Line of credit facility, borrowing capacity, description	Borrowings available under the TLLP Revolving Credit Facility are up to the total available revolving capacity of the facility.
9 3/4% Senior note [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Unamortized Discount	$ 9,000,000	$ 9,000,000

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Tesoro Logistics LP, Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 710	$ 900	$ 724	$ 648
Receivables, less allowance for doubtful accounts
Trade	1,364	1,272
Other Current Assets	225	216
Net Property, Plant and Equipment	5,212	5,148
Other Noncurrent Assets	459	367
TOTAL ASSETS	9,908	9,892
Accounts payable
Accrued liabilities	471	526
Debt	1,283	1,283
TOTAL LIABILITIES AND EQUITY	9,908	9,892
Tesoro Logistics LP
ASSETS
Cash and cash equivalents	21	18
Receivables, less allowance for doubtful accounts
Trade	1	1
Affiliate	8	11
Other Current Assets	0	1
Net Property, Plant and Equipment	137	136
Other Noncurrent Assets	2	3
TOTAL ASSETS	169	170
Accounts payable
Trade	4	6
Affiliate	3	3
Deferred revenue- affiliate	2	1
Accrued liabilities	0	1
Debt	50	50
Equity	110	109
TOTAL LIABILITIES AND EQUITY	$ 169	$ 170

XML

Condensed Consolidating Financial Information (Tables)

3 Months Ended

Mar. 31, 2012

Condensed Consolidating Financial Statements [Abstract]

Condensed Consolidated Balance Sheet [Table Text Block]

Condensed Consolidating Balance Sheet as of March 31, 2012

(In millions)

	Parent		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	661		$	49	$	—		$	710
Receivables, less allowance for doubtful accounts	1		1,315			48		—			1,364
Inventories	—		1,427			288		—			1,715
Prepayments and other	118		86			21		—			225
Total Current Assets	119		3,489			406		—			4,014
Net Property, Plant and Equipment	—		4,991			221		—			5,212
Investment in Subsidiaries	4,492		(299		)	313		(4,506		)	—
Long-Term Receivables from Affiliates	2,000		—			—		(2,000		)	—
Other Noncurrent Assets	40		640			52		(50		)	682
Total Assets	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	115	$	2,468		$	201	$	—		$	2,784
Current maturities of debt	299		2			90		—			391
Total Current Liabilities	414		2,470			291		—			3,175
Long-Term Payables to Affiliates	—		1,961			39		(2,000		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,221		177			3		—			1,401
Equity-Tesoro Corporation	3,752		4,194			299		(4,506		)	3,739
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908

Condensed Consolidating Balance Sheet as of December 31, 2011

(In millions)

	Tesoro Corporation		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	805		$	95	$	—		$	900
Receivables, less allowance for doubtful accounts	1		1,189			82		—			1,272
Inventories	—		1,416			347		—			1,763
Prepayments and other	106		88			22		—			216
Total Current Assets	107		3,498			546		—			4,151
Net Property, Plant and Equipment	—		4,925			223		—			5,148
Investment in Subsidiaries	4,436		(284		)	282		(4,434		)	—
Long-Term Receivables from Affiliates	1,944		—			—		(1,944		)	—
Other Noncurrent Assets	42		548			53		(50		)	593
Total Assets	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	85	$	2,420		$	326	$	—		$	2,831
Current maturities of debt	299		2			117		—			418
Total Current Liabilities	384		2,422			443		—			3,249
Long-Term Payables to Affiliates	—		1,922			22		(1,944		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,200		177			5		—			1,382
Equity-Tesoro Corporation	3,681		4,147			274		(4,434		)	3,668
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892

Condensed Consolidated Statement Of Operations [Table Text Block]

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	9,633		$	596		$	(2,409	)	$	7,820
Costs and expenses	2			9,506			587			(2,409		)	7,686
OPERATING INCOME (LOSS)	(2		)	127			9			—			134
Equity in earnings (loss) of subsidiaries	59			(13		)	31			(77		)	—
Other expense	(1		)	(32		)	(2		)	—			(35		)
EARNINGS (LOSS) BEFORE INCOME TAXES	56			82			38			(77		)	99
Income tax expense (a)	—			35			2			—			37
NET EARNINGS (LOSS)	56			47			36			(77		)	62
Less net income attributable to noncontrolling interest	—			—			6			—			6
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION STOCKHOLDERS	$	56		$	47		$	30		$	(77	)	$	56
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	56		$	47		$	36		$	(77	)	$	62
Less noncontrolling interest in comprehensive income	—			—			6			—			6
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	$	56		$	47		$	30		$	(77	)	$	56

_______________

(a) 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.

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	8,241		$	688		$	(2,403	)	$	6,526
Costs and expenses	4			8,023			683			(2,403		)	6,307
OPERATING INCOME (LOSS)	(4		)	218			5			—			219
Equity in earnings (loss) of subsidiaries	109			(12		)	—			(97		)	—
Other expense	—			(40		)	(2		)	—			(42		)
EARNINGS (LOSS) BEFORE INCOME TAXES	105			166			3			(97		)	177
Income tax expense (benefit) (a)	(2		)	71			1			—			70
NET EARNINGS (LOSS)	$	107		$	95		$	2		$	(97	)	$	107
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	107		$	95		$	2		$	(97	)	$	107
TOTAL COMPREHENSIVE INCOME (LOSS)	$	107		$	95		$	2		$	(97	)	$	107

_______________

(a) The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from subsidiaries.

Condensed Consolidated Statement Of Cash Flows [Table Text Block]

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	13		$	(12	)	$	(16	)	$	—		$	(15	)
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(107		)	(4		)	—			(111		)
Acquisitions	—			(37		)	—			—			(37		)
Intercompany notes, net	(20		)	—			—			20			—
Net cash from (used in) investing activities	(20		)	(144		)	(4		)	20			(148		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			85			—			85
Repayments on revolving credit agreements	—			—			(112		)	—			(112		)
Proceeds from stock options exercised	14			—			—			—			14
Excess tax benefits from stock-based compensation arrangements	—			3			—			—			3
Distributions to noncontrolling interest	—			—			(6		)	—			(6		)
Purchases of common stock	(10		)	—			—			—			(10		)
Net intercompany borrowings (repayments)	—			6			14			(20		)	—
Distributions to Subordinated unitholders	3			3			(6		)	—			—
Financing costs and other	—			—			(1		)	—			(1		)
Net cash from (used in) financing activities	7			12			(26		)	(20		)	(27		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			(144		)	(46		)	—			(190		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			805			95			—			900
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	661		$	49		$	—		$	710

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	5		$	422		$	(216	)	$	—		$	211
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(48		)	—			—			(48		)
Intercompany notes, net	16			—			—			(16		)	—
Net cash from (used in) investing activities	16			(48		)	—			(16		)	(48		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			60			—			60
Repayments on revolving credit agreements	—			—			(130		)	—			(130		)
Proceeds from stock options exercised	4			—			—			—			4
Purchases of common stock	(3		)	—			—			—			(3		)
Excess tax benefits from stock-based compensation arrangements	—			4			—			—			4
Net intercompany borrowings (repayments)	—			(291		)	275			16			—
Financing costs and other	(22		)	—			—			—			(22		)
Net cash from (used in) financing activities	(21		)	(287		)	205			16			(87		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			87			(11		)	—			76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			612			36			—			648
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	699		$	25		$	—		$	724

XML

Debt, Credit Facilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Dec. 31, 2011
Tesoro Corporation Revolving Credit Facility ($1.85 billion) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,250
Letters of credit outstanding, amount	1,030
Eurodollar Rate	0.24%	[1]
Eurodollar Margin	1.75%	[1]
Base Rate	3.25%	[1]
Base Rate Margin	0.75%	[1]
Commitment Fee (unused portion)	0.375%	[1]
Letter of Credit Agreements [Member]
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount	445
TPSA Revolving Credit Facility ($500 million) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	700
Letters of credit outstanding, amount	38
Eurodollar Rate	0.24%	[1]
Eurodollar Margin	2.75%	[1]
Base Rate	3.25%	[1]
Base Rate Margin	1.75%	[1]
TLLP Revolving Credit Facility ($150 million) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 450		$ 300
Eurodollar Rate	0.24%	[1]
Eurodollar Margin	2.50%	[1]
Base Rate	3.25%	[1]
Base Rate Margin	1.50%	[1]
Commitment Fee (unused portion)	0.50%	[1]

[1] We have the option to elect if the borrowings will bear interest at either a base rate plus the base rate margin, or a Eurodollar rate, for the applicable period, plus, the Eurodollar margin at the time of the borrowing. Letters of credit outstanding under the Tesoro Corporation Revolving Credit Facility and the TPSA Revolving Credit Facility incur fees at the Eurodollar margin rate and the base rate margin, respectively.

XML

Condensed Consolidating Financial Information, Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Current Assets: [Abstract]
Cash and cash equivalents	$ 710	$ 900	$ 724	$ 648
Receivables, less allowance for doubtful accounts	1,364	1,272
Inventories	1,715	1,763
Prepayments and other	225	216
Total Current Assets	4,014	4,151
Net property, plant and equipment	5,212	5,148
Investment in Subsidiaries	0	0
Long-Term Receivables from Affiliates	0	0
Other Noncurrent Assets	682	593
Total Assets	9,908	9,892
Current Liabilities: [Abstract]
Accounts payable and accrued liabilities	2,784	2,831
Current maturities of debt	391	418
Total Current Liabilities	3,175	3,249
Long-Term Payables to Affiliates	0	0
Debt	1,283	1,283
Other Noncurrent Liabilities	1,401	1,382
Equity - Tesoro Corporation	3,739	3,668
Equity - Noncontrolling interest	310	310
Total Liabilities and Stockholders' Equity	9,908	9,892
Tesoro Corporation [Member]
Current Assets: [Abstract]
Cash and cash equivalents	0	0	0	0
Receivables, less allowance for doubtful accounts	1	1
Inventories	0	0
Prepayments and other	118	106
Total Current Assets	119	107
Net property, plant and equipment	0	0
Investment in Subsidiaries	4,492	4,436
Long-Term Receivables from Affiliates	2,000	1,944
Other Noncurrent Assets	40	42
Total Assets	6,651	6,529
Current Liabilities: [Abstract]
Accounts payable and accrued liabilities	115	85
Current maturities of debt	299	299
Total Current Liabilities	414	384
Long-Term Payables to Affiliates	0	0
Debt	1,264	1,264
Other Noncurrent Liabilities	1,221	1,200
Equity - Tesoro Corporation	3,752	3,681
Equity - Noncontrolling interest	0	0
Total Liabilities and Stockholders' Equity	6,651	6,529
Guarantor Subsidiaries [Member]
Current Assets: [Abstract]
Cash and cash equivalents	661	805	699	612
Receivables, less allowance for doubtful accounts	1,315	1,189
Inventories	1,427	1,416
Prepayments and other	86	88
Total Current Assets	3,489	3,498
Net property, plant and equipment	4,991	4,925
Investment in Subsidiaries	(299)	(284)
Long-Term Receivables from Affiliates	0	0
Other Noncurrent Assets	640	548
Total Assets	8,821	8,687
Current Liabilities: [Abstract]
Accounts payable and accrued liabilities	2,468	2,420
Current maturities of debt	2	2
Total Current Liabilities	2,470	2,422
Long-Term Payables to Affiliates	1,961	1,922
Debt	19	19
Other Noncurrent Liabilities	177	177
Equity - Tesoro Corporation	4,194	4,147
Equity - Noncontrolling interest	0	0
Total Liabilities and Stockholders' Equity	8,821	8,687
Non-Guarantors [Member]
Current Assets: [Abstract]
Cash and cash equivalents	49	95	25	36
Receivables, less allowance for doubtful accounts	48	82
Inventories	288	347
Prepayments and other	21	22
Total Current Assets	406	546
Net property, plant and equipment	221	223
Investment in Subsidiaries	313	282
Long-Term Receivables from Affiliates	0	0
Other Noncurrent Assets	52	53
Total Assets	992	1,104
Current Liabilities: [Abstract]
Accounts payable and accrued liabilities	201	326
Current maturities of debt	90	117
Total Current Liabilities	291	443
Long-Term Payables to Affiliates	39	22
Debt	50	50
Other Noncurrent Liabilities	3	5
Equity - Tesoro Corporation	299	274
Equity - Noncontrolling interest	310	310
Total Liabilities and Stockholders' Equity	992	1,104
Eliminations [Member]
Current Assets: [Abstract]
Cash and cash equivalents	0	0	0	0
Receivables, less allowance for doubtful accounts	0	0
Inventories	0	0
Prepayments and other	0	0
Total Current Assets	0	0
Net property, plant and equipment	0	0
Investment in Subsidiaries	(4,506)	(4,434)
Long-Term Receivables from Affiliates	(2,000)	(1,944)
Other Noncurrent Assets	(50)	(50)
Total Assets	(6,556)	(6,428)
Current Liabilities: [Abstract]
Accounts payable and accrued liabilities	0	0
Current maturities of debt	0	0
Total Current Liabilities	0	0
Long-Term Payables to Affiliates	(2,000)	(1,944)
Debt	(50)	(50)
Other Noncurrent Liabilities	0	0
Equity - Tesoro Corporation	(4,506)	(4,434)
Equity - Noncontrolling interest	0	0
Total Liabilities and Stockholders' Equity	$ (6,556)	$ (6,428)

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Operating Segments, Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Segment Reporting Information, Operating Income (Loss) [Abstract]
Total Revenues	$ 7,820		$ 6,526
Total Segment Operating Income	187		305
Reconciliation of Operating Income from Segments to Consolidated [Abstract]
Corporate and unallocated costs	(53)		(86)
Operating Income	134		219
Segment Reporting Information, Income (Loss) before Income Taxes [Abstract]
Interest, financing and other costs	(36)		(42)
Interest income and other	1		0
Earnings Before Income Taxes	99		177
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Depreciation and Amortization Expense	103		103
Capital Expenditures	102		42
Identifiable Assets	9,908				9,892
Table Footnotes [Abstract]
Federal and state motor fuel taxes on sales by our retail segment	99		91
Refining: [Member]
Reconciliation of Operating Income from Segments to Consolidated [Abstract]
Operating Income	191		303
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Depreciation and Amortization Expense	91		91
Capital Expenditures	91		38
Identifiable Assets	8,236				8,152
Refined products [Member]
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenues	7,562		6,270
Crude oil resales and other [Member]
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenues	156		155
Retail: [Member]
Reconciliation of Operating Income from Segments to Consolidated [Abstract]
Operating Income	(4)		2
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Depreciation and Amortization Expense	10		9
Capital Expenditures	8		3
Identifiable Assets	703				644
Fuel (a) [Member]
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenues	1,306	[1]	1,115	[1]
Merchandise and other [Member]
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenues	55		52
Intersegment sales from Refining to Retail [Member]
Segment Reporting Information, Operating Income (Loss) [Abstract]
Intersegment sales	(1,259)		(1,066)
Corporate [Member]
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract]
Depreciation and Amortization Expense	2		3
Capital Expenditures	3		1
Identifiable Assets	$ 969				$ 1,096

[1] 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, excluding credits, totaled $99 million and $91 million for the three months ended March 31, 2012 and 2011.

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Derivative Instruments, Derivative Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative maturity dates (in years)	2
Total Net Fair Value of Derivatives: Assets	$ 28		$ 39
Liabilities, Fair Value Disclosure	9		5
Total Net Fair value of Derivatives: Liabilities	2		2
Derivative, Collateral [Abstract]
Cash collateral outstanding	18		75
Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	182	[1]	102	[1]
Derivative Liabilities	174	[1]	140	[1]
Commodity Futures Contracts [Member] | Other Current Assets [Member] | Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	181	[1]	95	[1]
Derivative Liabilities	171	[1]	136	[1]
Commodity OTC Swap Contracts [Member]
Derivative, Collateral [Abstract]
Cash collateral outstanding	0
Commodity OTC Swap Contracts [Member] | Accounts Payable [Member] | Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	[1]	2	[1]
Derivative Liabilities	3	[1]	3	[1]
Commodity OTC Swap Contracts [Member] | Receivables [Member] | Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	1	[1]	1	[1]
Derivative Liabilities	0	[1]	0	[1]
Commodity Forward Contracts [Member] | Accounts Payable [Member] | Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	[1]	0	[1]
Derivative Liabilities	0	[1]	1	[1]
Commodity Forward Contracts [Member] | Receivables [Member] | Mark-to-Market Derivatives (a) [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	0	[1]	4	[1]
Derivative Liabilities	0	[1]	0	[1]
Less: Counterparty Netting and Cash Collateral (b) [Member]
Derivatives, Fair Value [Line Items]
Total Net Fair Value of Derivatives: Assets	(154)	[2]	(63)	[2]
Liabilities, Fair Value Disclosure	$ (172)	[2]	$ (138)	[2]

[1] The above fair values are presented as gross amounts, including when the derivatives are subject to master netting arrangements and qualify for net presentation in the consolidated balance sheet.

[2] As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market commodity future contracts.

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Inventories (Notes)

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

INVENTORIES

INVENTORIES

Components of inventories were as follows (in millions):

	March 31, 2012		December 31, 2011
Domestic crude oil and refined products	$	1,283	$	1,273
Foreign subsidiary crude oil	288		346
Materials and supplies	88		87
Oxygenates and by-products	41		43
Merchandise	15		14
Total Inventories	$	1,715	$	1,763

We use the last-in, first-out (“LIFO”) cost method as the primary method to determine the cost of crude oil held by our U.S. subsidiaries (“Domestic crude oil”) and refined product inventories in our refining and retail segments. We determine the carrying value of inventories of crude oil held by our foreign subsidiaries (“Foreign subsidiary crude oil”), oxygenates, and by-products using the first-in, first-out (“FIFO”) cost method. The total carrying value of our crude oil and refined product inventories was less than replacement cost by approximately $2.2 billion and $1.7 billion at March 31, 2012 and December 31, 2011, respectively.

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Operating Segments (Details)	3 Months Ended
	Mar. 31, 2012 segments
Segment Reporting Information [Line Items]
Number of operating segments	2
Segment reporting, additional information about entity's reportable segments	We do not have significant operations in foreign countries. Therefore, revenue in foreign countries and long-lived assets located in foreign countries are not material to our operations.
Refining [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	We own and operate seven petroleum refineries located in California, Washington, Alaska, Hawaii, North Dakota and Utah. These refineries manufacture gasoline and gasoline blendstocks, jet fuel, diesel fuel, residual fuel oil and other refined products. We sell these refined products, together with refined products purchased from third-parties, at wholesale through terminal facilities and other locations. Our refining segment also sells refined products to unbranded marketers and occasionally exports refined products to foreign markets.
Number of refineries	7
Retail [Member]
Segment Reporting Information [Line Items]
Segment reporting information, description of products and services	Our retail segment sells gasoline, diesel fuel and convenience store items through company-operated retail stations and branded jobber/dealers in 18 states.
Number of states with retail sites	18

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Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Basic [Abstract]
Net earnings attributable to Tesoro Corporation stockholders	$ 56	$ 107
Weighted average common shares outstanding	139.5	141.6
Basic Earnings Per Share	$ 0.40	$ 0.76
Diluted [Abstract]
Net earnings attributable to Tesoro Corporation stockholders	$ 56	$ 107
Weighted average common shares outstanding	139.5	141.6
Common stock equivalents	2.3	2.4
Total diluted shares	141.8	144.0
Diluted Earnings (Loss) Per Share	$ 0.39	$ 0.74

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

Financial instruments recognized at their fair values in our consolidated balance sheets by level within the fair value hierarchy were as follows (in millions):

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of March 31, 2012
Assets:
Commodity Futures Contracts	$	174	$	7	$	—	$	(153	)	$	28
Commodity OTC Swap Contracts	—		1		—		(1		)	—
Total Assets	$	174	$	8	$	—	$	(154	)	$	28
Liabilities:
Commodity Futures Contracts	$	168	$	3	$	—	$	(171	)	$	—
Commodity OTC Swap Contracts	—		3		—		(1		)	2
RINs Obligation	—		7		—		—			7
Total Liabilities	$	168	$	13	$	—	$	(172	)	$	9

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of December 31, 2011
Assets:
Commodity Futures Contracts	$	86	$	9	$	—	$	(61	)	$	34
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		4		—		—			4
Total Assets	$	86	$	16	$	—	$	(63	)	$	39
Liabilities:
Commodity Futures Contracts	$	130	$	6	$	—	$	(136	)	$	—
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		1		—		—			1
RINs Obligation	—		3		—		—			3
Total Liabilities	$	130	$	13	$	—	$	(138	)	$	5

________________

(a) Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market derivative assets.

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Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Schedule of Inventory, Current [Table Text Block]

Components of inventories were as follows (in millions):

	March 31, 2012		December 31, 2011
Domestic crude oil and refined products	$	1,283	$	1,273
Foreign subsidiary crude oil	288		346
Materials and supplies	88		87
Oxygenates and by-products	41		43
Merchandise	15		14
Total Inventories	$	1,715	$	1,763

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Commitments and Contingencies, Environmental Liabilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 entities	Dec. 31, 2011
Environmental Exit Cost [Line Items]
Cost-share arrangement percentage responsible	.75
Reporting entity [Member]
Environmental Exit Cost [Line Items]
Accruals for environmental expenditures	$ 93	$ 93
Martinez refinery [Member]
Environmental Exit Cost [Line Items]
Accruals for environmental expenditures	55	55
Environmental accrual cost-share arrangment	46
Environmental insurance coverage ceiling	190
Self insurance deductible	$ 50
Number of previous owners	2

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Earnings Per Share, Potentially Dilutive Stock (Details) (Stock options [Member]) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	3.0	[1]	3.2	[1]

[1] Common stock options presented above were excluded as the exercise prices were greater than the average market price of the common stock during each respective reporting period.

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

Gains (losses) for our mark-to market derivatives for the three months ended March 31, 2012 and 2011, were as follows (in millions):

	Three Months Ended
	March 31,
Mark-to-Market Derivatives:	2012			2011
Commodity Futures Contracts	$	(12	)	$	(56	)
Commodity OTC Swap Contracts	(6		)	(1		)
Commodity Forward Contracts	(3		)	7
Foreign Currency Forward Contracts	1			1
Total Mark-to-Market Derivatives	$	(20	)	$	(49	)

The income statement location of gains (losses) for our mark-to market derivatives above were as follows (in millions):

	Three Months Ended
	March 31,
Income Statement Location:	2012			2011
Revenues	$	(10	)	$	(16	)
Cost of sales	(11		)	(34		)
Interest, financing and other costs	1			1
Total Loss on Mark-to-Market Derivatives	$	(20	)	$	(49	)

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

Losses on our derivatives designated for hedge accounting during the three months ended March 31, 2012, were as follows (in millions).

Derivatives Designated for Hedge Accounting:	Amount of Loss Recognized in Income on Derivatives			Amount of Loss Recognized in Income on Hedged Item		Amount of Loss Recognized in Income on Ineffective Portion of Derivative (b)
Three months ended March 31, 2012
Commodity Futures Contracts (a)	$	—		$	—	$	—
Three months ended March 31, 2011
Commodity Futures Contracts (a)	$	(1	)	$	—	$	(1	)

________________

(a) Losses recognized in income on the derivative and the hedged item are included in cost of sales in the statements of consolidated operations.

(b) For fair value hedges, no component of the derivative instruments' gains or losses was excluded from the assessment of hedge effectiveness. No amounts were recognized in income for hedged firm commitments that no longer qualify as fair value hedges.

Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table presents the fair value (in millions) of our derivative instruments as of March 31, 2012 and December 31, 2011. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with or received from brokers. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheet.

		Derivative Assets						Derivative Liabilities
	Balance Sheet Location	March 31, 2012			December 31, 2011			March 31, 2012			December 31, 2011
Mark-to-Market Derivatives (a):
Commodity Futures Contracts	Other Current Assets	$	181		$	95		$	171		$	136
Commodity OTC Swap Contracts	Receivables	1			1			—			—
Commodity OTC Swap Contracts	Accounts Payable	—			2			3			3
Commodity Forward Contracts	Receivables	—			4			—			—
Commodity Forward Contracts	Accounts Payable	—			—			—			1
Total Gross Mark-to-Market Derivatives		182			102			174			140
Less: Counterparty Netting and Cash Collateral (b)		(154		)	(63		)	(172		)	(138		)
Total Net Fair Value of Derivatives		$	28		$	39		$	2		$	2

________________

(a) The above fair values are presented as gross amounts, including when the derivatives are subject to master netting arrangements and qualify for net presentation in the consolidated balance sheet.

(b) As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market commodity future contracts.

Open Positions [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

All of our open positions are scheduled to mature within two years. As of March 31, 2012, we had an open forward contract to purchase CAD $44 million that matured on April 25, 2012. The information below presents the net volume of outstanding commodity contracts by type of instrument and year of maturity as of March 31, 2012 (volumes in thousands of barrels):

Derivatives Designated for Hedge Accounting		Mark-to-Market Derivatives
Derivative instrument and Year of maturity	Long (Short) Contract Volumes	Derivative instrument and Year of maturity	Long (Short) Contract Volumes
Swaps		Swaps
2012	—	2012	1,021
2013	—	2013	—
Futures		Futures
2012	—	2012	(3,734)
2013	—	2013	(50)
Forwards		Forwards
2012	—	2012	—

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Debt (Tables)

3 Months Ended

Mar. 31, 2012

Debt [Abstract]

Schedule of Debt [Table Text Block]

Our total debt at March 31, 2012 and December 31, 2011, was comprised of the following (in millions):

Debt, including current maturities:	March 31, 2012		December 31, 2011
Tesoro Corporation Revolving Credit Facility	$	—	$	—
Tesoro Panama Company S.A. (“TPSA”) Revolving Credit Facility	90		117
TLLP Revolving Credit Facility	50		50
6¼% Senior Notes Due 2012	299		299
65/8% Senior Notes Due 2015	450		450
6½% Senior Notes Due 2017	473		473
9¾% Senior Notes Due 2019 (net of unamortized discount of $9 million)	291		291
Capital Lease Obligations and Other	21		21
Total Debt	$	1,674	$	1,701

Schedule of Line of Credit Facilities [Table Text Block]

Our credit facilities as of March 31, 2012, were subject to the following expenses and fees.

Credit Facility	30 day Eurodollar (LIBOR) Rate	Eurodollar Margin	Base Rate	Base Rate Margin	Commitment Fee (unused portion)
Tesoro Corporation Revolving Credit Facility ($1.85 billion) (a)	0.24%	1.75%	3.25%	0.75%	0.375%
TPSA Revolving Credit Facility ($500 million) (a)	0.24%	2.75%	3.25%	1.75%	N/A
TLLP Revolving Credit Facility ($300 million) (a)	0.24%	2.50%	3.25%	1.50%	0.50%

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Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2012

Earnings Loss Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

We compute basic earnings per share by dividing net earnings attributable to Tesoro Corporation shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share include the effects of potentially dilutive shares, principally consisting of common stock options, unvested restricted stock, restricted stock units, market stock units and performance share awards outstanding during the period. Additionally, for the diluted earnings per share computation, net earnings attributable to Tesoro Corporation is reduced, where applicable, for the decrease in earnings from Tesoro's limited partner unit ownership in TLLP that would have resulted assuming the incremental units related to TLLP's equity incentive plans had been issued during the respective periods.

Share and per share calculations are presented below (in millions except per share amounts):

	Three Months Ended
	March 31,
	2012		2011
Basic:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Basic Earnings Per Share	$	0.40	$	0.76
Diluted:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Common stock equivalents	2.3		2.4
Total diluted shares	141.8		144.0
Diluted Earnings Per Share	$	0.39	$	0.74

Potentially dilutive common stock equivalents were excluded from the calculation of diluted earnings per share, as the effect of including such securities would have been anti-dilutive, were as follows (in millions):

	Three Months Ended
	March 31,
	2012	2011
Stock options (a)	3.0	3.2

________________

(a) Common stock options presented above were excluded as the exercise prices were greater than the average market price of the common stock during each respective reporting period.

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Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment, at cost, is as follows (in millions):

	March 31, 2012			December 31, 2011
Refining	$	6,247		$	6,161
Retail	717			679
Corporate	216			215
Property, plant and equipment, at cost	7,180			7,055
Accumulated depreciation	(1,968		)	(1,907		)
Net property, plant and equipment	$	5,212		$	5,148

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Tesoro Logistics LP, Schedule of Partner Units (Details)	3 Months Ended
	Mar. 31, 2012
Capital Unit [Line Items]
Limited partner common units outstanding	304,890
Subordinated units outstanding	15,254,890
General partner units outstanding	622,649
Limited Partner [Member]
Capital Unit [Line Items]
Percentage ownership	52.00%
General Partner [Member]
Capital Unit [Line Items]
Percentage ownership	2.00%

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Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Property Plant and Equipment, at cost [Abstract]
Property, plant and equipment, at cost	$ 7,180		$ 7,055
Accumulated depreciation	(1,968)		(1,907)
Net property, plant and equipment	5,212		5,148
Capitalized interest	4	4
Refining [Member]
Property Plant and Equipment, at cost [Abstract]
Property, plant and equipment, at cost	6,247		6,161
Retail [Member]
Property Plant and Equipment, at cost [Abstract]
Property, plant and equipment, at cost	717		679
Corporate [Member]
Property Plant and Equipment, at cost [Abstract]
Property, plant and equipment, at cost	$ 216		$ 215

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Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CURRENT ASSETS
Cash and cash equivalents	$ 710	$ 900
Receivables, less allowance for doubtful accounts	1,364	1,272
Inventories	1,715	1,763
Prepayments and other	225	216
Total Current Assets	4,014	4,151
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment, at cost	7,180	7,055
Less accumulated depreciation and amortization	(1,968)	(1,907)
Net Property, Plant and Equipment	5,212	5,148
OTHER NONCURRENT ASSETS
Acquired intangibles, net	223	226
Other, net	459	367
Total Other Noncurrent Assets	682	593
Total Assets	9,908	9,892
CURRENT LIABILITIES
Accounts payable	2,313	2,305
Accrued liabilities	471	526
Current maturities of debt	391	418
Total Current Liabilities	3,175	3,249
DEFERRED INCOME TAXES	837	815
OTHER NONCURRENT LIABILITIES	564	567
Debt	1,283	1,283
COMMITMENTS AND CONTINGENCIES (Note J)
TESORO CORPORATION STOCKHOLDERS' EQUITY
Common stock, par value $0.16 2/3; authorized 200,000,000 shares; 151,682,254 shares issued (150,733,991 in 2011)	25	25
Preferred stock, no par value; authorized 5,000,000 shares; 0 shares issued	0	0
Additional paid-in capital	1,025	1,000
Retained earnings	3,000	2,944
Treasury stock, 11,160,098 common shares (10,769,510 in 2011), at cost	(236)	(226)
Accumulated other comprehensive loss	(75)	(75)
Total Tesoro Corporation Stockholders' Equity	3,739	3,668
NONCONTROLLING INTEREST	310	310
Total Equity	4,049	3,978
Total Liabilities and Stockholders' Equity	$ 9,908	$ 9,892

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Inventories (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Domestic crude oil and refined products	$ 1,283,000,000	$ 1,273,000,000
Foreign subsidiary crude oil	288,000,000	346,000,000
Materials and supplies	88,000,000	87,000,000
Oxygenates and by-products	41,000,000	43,000,000
Merchandise	15,000,000	14,000,000
Total Inventories	1,715,000,000	1,763,000,000
Excess of replacement or current costs over stated LIFO value	$ 2,200,000,000	$ 1,700,000,000

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Basis of Presentation (Notes)

3 Months Ended

Mar. 31, 2012

Basis Of Presentation [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION

As used in this report, the terms “Tesoro,” “we,” “us” or “our” may refer to Tesoro Corporation, one or more of its consolidated subsidiaries or all of them taken as a whole. The words “we,” “us” or “our” generally include Tesoro Logistics LP (“TLLP”) and its subsidiaries as consolidated subsidiaries of Tesoro Corporation with certain exceptions where there are transactions or obligations between TLLP and Tesoro Corporation or its other subsidiaries. When used in descriptions of agreements and transactions, “TLLP” or the “Partnership” refers to TLLP and its consolidated subsidiaries.

The interim condensed consolidated financial statements and notes thereto of Tesoro Corporation and its subsidiaries have been prepared by management without audit according to the rules and regulations of the Securities and Exchange Commission (“SEC”). The accompanying condensed consolidated financial statements reflect all adjustments that, in the opinion of management, are necessary for a fair presentation of results for the periods presented. Such adjustments are of a normal recurring nature, unless otherwise disclosed.

The consolidated balance sheet at December 31, 2011, has been condensed from the audited consolidated financial statements at that date. Certain information and notes normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to the SEC's rules and regulations. However, management believes that the disclosures presented herein are adequate to fairly present the information. The accompanying condensed consolidated financial statements and notes should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2011.

We prepare our condensed consolidated financial statements in conformity with U.S. GAAP, which requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods presented. We review our estimates on an ongoing basis, based on currently available information. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates. The results of operations for any interim period are not necessarily indicative of results for the full year. Certain prior year balances have been aggregated in order to conform to the current year presentation.

Our consolidated financial statements include TLLP, a variable interest entity. As the general partner of TLLP, we have the sole ability to direct the activities of TLLP that most significantly impact its economic performance. We are also considered to be the primary beneficiary for accounting purposes and are TLLP's primary customer. Under our long-term transportation agreements with TLLP (discussed further below), transactions with us accounted for 97% of TLLP's total revenues for the three months ended March 31, 2012. As TLLP does not derive a significant amount of revenue from third parties, there is limited risk to Tesoro associated with TLLP's operations. However, in the event that TLLP incurs a loss, our operating results will reflect TLLP's loss, net of intercompany eliminations, to the extent of our ownership interest in TLLP.

New Accounting Standards

The Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) in December 2011, which requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of these arrangements on its financial position. The guidance requires entities to disclose both gross information and net information about both instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to an agreement similar to a master netting arrangement. These provisions are effective for interim and annual reporting periods beginning on January 1, 2013. The adoption of this guidance effective January 1, 2013 will not have a material impact on our financial position, but may result in additional disclosures.

The FASB issued an ASU in May 2011 related to fair value measurements and disclosures to achieve common fair value measurements and additional consistency of disclosures between U.S. GAAP and International Financial Reporting Standards. This standard includes amendments that clarify the application of existing fair value measurements and disclosure requirements, while other amendments change a principle or requirement for fair value measurements or disclosures. Some of the changes include (1) the application of the highest and best use and valuation premise concepts, (2) measuring the fair value of an instrument classified in a reporting entity’s shareholders’ equity, and (3) quantitative information required for fair value measurements categorized within level 3 of the fair value hierarchy. In addition, this standard requires additional disclosure for level 3 measurements regarding the sensitivity of fair value to changes in unobservable inputs and any interrelationships between those inputs. The adoption of this guidance effective January 1, 2012, did not have a material impact on our consolidated financial statements.

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Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Total Equity [Roll Forward]
Balance at December 31, 2011	$ 3,978
Net earnings	62	107
Shares issued for equity-based compensation awards	15
Excess tax benefits from stock-based compensation arrangements	3
Amortization of equity settled awards	7
Purchases of common stock	(10)	(3)
Distributions to noncontrolling interest	(6)	0
Balance at March 31, 2012	4,049		3,978
Shares issued for equity-based compensation plans	900,000		1,600,000
Equity awards granted, shares	1,000,000
Number of shares purchased	321,000
Average cost per share	$ 28.22
Amount paid for share purchases	9
Tesoro Corporation Stockholders' Equity [Member]
Total Equity [Roll Forward]
Balance at December 31, 2011	3,668
Net earnings	56
Shares issued for equity-based compensation awards	15
Excess tax benefits from stock-based compensation arrangements	3
Amortization of equity settled awards	7
Purchases of common stock	(10)
Distributions to noncontrolling interest	0
Balance at March 31, 2012	3,739
Noncontrolling Interest [Member]
Total Equity [Roll Forward]
Balance at December 31, 2011	310
Net earnings	6
Shares issued for equity-based compensation awards	0
Excess tax benefits from stock-based compensation arrangements	0
Amortization of equity settled awards	0
Purchases of common stock	0
Distributions to noncontrolling interest	(6)
Balance at March 31, 2012	$ 310

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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Stock Based Compensation [Abstract]

Summary of Stock-based Compensation Expense [Table Text Block]

Stock-based compensation expense included in our condensed statements of consolidated operations was as follows (in millions):    

	Three Months Ended
	March 31,
	2012		2011
Stock appreciation rights	$	12	$	35
Phantom stock options	—		11
Market stock units	3		—
Performance share awards	2		—
Other stock-based awards	4		2
Total Stock-Based Compensation Expense	$	21	$	48

Summary of Market Stock Units [Table Text Block]

A summary of our market stock unit award activity, assuming a 100% payout, is set forth below (units in thousands):

	Number of Units		Weighted Average Grant-Date Fair Value		Intrinsic Value
					(In millions)
Nonvested at January 1, 2012	424		$	34.22	$	9
Granted	665		$	33.93
Forfeited	(11	)	$	34.29
Nonvested at March 31, 2012	1,078		$	34.04	$	33

Summary of Performance Share Awards [Table Text Block]

A summary of our performance share award activity, assuming a 100% payout, is set forth below (shares in thousands):

	Number of Shares		Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2012	274		$	31.53
Granted	380		$	30.98
Forfeited	(3	)	$	31.90
Nonvested at March 31, 2012	651		$	31.20

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Subsequent Events Subsequent Events (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 01, 2012
Subsequent Event [Line Items]
Contribution date of Martinez Crude Oil Marine Terminal		4/1/2012
Consideration received from TLLP	$ 75.0
Long-term purchase commitment, minimum quantity required	65,000
Price per barrel under throughput agreement	0.55
Cash [Member]
Subsequent Event [Line Items]
Consideration received from TLLP	67.5
Issuance of Equity [Member]
Subsequent Event [Line Items]
Consideration received from TLLP	$ 7.5
Single-berth dock [Member]
Subsequent Event [Line Items]
Capacity		145,000
Crude oil storage tanks [Member]
Subsequent Event [Line Items]
Assets contributed		5
Capacity		425,000
Firewater tanks [Member]
Subsequent Event [Line Items]
Assets contributed		2
Capacity		48,000
Contribution of Martinez Crude Oil Terminal [Member]
Subsequent Event [Line Items]
Common units issued		206,362
General partners units issued		4,212
Limited partner ownership interest	1.00%
Throughput Agreement [Member]
Subsequent Event [Line Items]
Long-term purchase agreement time period	10

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2012

Basis Of Presentation [Abstract]

Basis of Presentation and Significant Accounting Policies [Text Block]

We prepare our condensed consolidated financial statements in conformity with U.S. GAAP, which requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods presented.

Use of Estimates, Policy [Policy Text Block]

We review our estimates on an ongoing basis, based on currently available information. Changes in facts and circumstances may result in revised estimates and actual results could differ from those estimates.

Consolidation, Variable Interest Entity, Policy [Policy Text Block]

Our consolidated financial statements include TLLP, a variable interest entity. As the general partner of TLLP, we have the sole ability to direct the activities of TLLP that most significantly impact its economic performance. We are also considered to be the primary beneficiary for accounting purposes and are TLLP's primary customer.

Description of New Accounting Pronouncements Not yet Adopted [Text Block]

The Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) in December 2011, which requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of these arrangements on its financial position. The guidance requires entities to disclose both gross information and net information about both instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to an agreement similar to a master netting arrangement. These provisions are effective for interim and annual reporting periods beginning on January 1, 2013. The adoption of this guidance effective January 1, 2013 will not have a material impact on our financial position, but may result in additional disclosures.

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

New Accounting Standards

The Financial Accounting Standards Board (“FASB”) issued an Accounting Standards Update (“ASU”) in December 2011, which requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of these arrangements on its financial position. The guidance requires entities to disclose both gross information and net information about both instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to an agreement similar to a master netting arrangement. These provisions are effective for interim and annual reporting periods beginning on January 1, 2013. The adoption of this guidance effective January 1, 2013 will not have a material impact on our financial position, but may result in additional disclosures.

The FASB issued an ASU in May 2011 related to fair value measurements and disclosures to achieve common fair value measurements and additional consistency of disclosures between U.S. GAAP and International Financial Reporting Standards. This standard includes amendments that clarify the application of existing fair value measurements and disclosure requirements, while other amendments change a principle or requirement for fair value measurements or disclosures. Some of the changes include (1) the application of the highest and best use and valuation premise concepts, (2) measuring the fair value of an instrument classified in a reporting entity’s shareholders’ equity, and (3) quantitative information required for fair value measurements categorized within level 3 of the fair value hierarchy. In addition, this standard requires additional disclosure for level 3 measurements regarding the sensitivity of fair value to changes in unobservable inputs and any interrelationships between those inputs. The adoption of this guidance effective January 1, 2012, did not have a material impact on our consolidated financial statements.

Inventory, Policy [Policy Text Block]

We use the last-in, first-out (“LIFO”) cost method as the primary method to determine the cost of crude oil held by our U.S. subsidiaries (“Domestic crude oil”) and refined product inventories in our refining and retail segments. We determine the carrying value of inventories of crude oil held by our foreign subsidiaries (“Foreign subsidiary crude oil”), oxygenates, and by-products using the first-in, first-out (“FIFO”) cost method.

Fair Value of Financial Instruments, Policy [Policy Text Block]

We classify financial assets and financial liabilities into the following fair value hierarchy:

• level 1 - quoted prices in active markets for identical assets and liabilities;

• level 2 - quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability; and

• level 3 - unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

We measure fair value using level 1 inputs, when available, because they provide the most reliable evidence of fair value. Derivative instruments and our Renewable Identification Numbers (“RINs”) are our only financial assets and financial liabilities measured at fair value on a recurring basis. See Note F for further information on the Company's derivative instruments.

Derivatives, Policy [Policy Text Block]

The accounting for changes in the fair value of a commodity derivative depends on whether the derivative has been designated in a hedging relationship and whether we have elected the normal purchases and normal sales exception. The accounting for the change in fair value can be summarized as follows:

Derivative Treatment	Accounting Method
Normal purchases and normal sales exception	Accrual accounting
Designated in qualifying hedging relationship	Hedge accounting
All other derivatives	Mark-to-market accounting

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Operating Segments (Tables)

3 Months Ended

Mar. 31, 2012

Operating Segments [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Segment information is as follows:

	Three Months Ended
	March 31,
	2012			2011
Revenues	(In millions)
Refining:
Refined products	$	7,562		$	6,270
Crude oil resales and other	156			155
Retail:
Fuel (a)	1,306			1,115
Merchandise and other	55			52
Intersegment sales from Refining to Retail	(1,259		)	(1,066		)
Total Revenues	$	7,820		$	6,526
Segment Operating Income (Loss)
Refining	$	191		$	303
Retail	(4		)	2
Total Segment Operating Income	187			305
Corporate and unallocated costs	(53		)	(86		)
Operating Income	134			219
Interest, financing and other costs	(36		)	(42		)
Interest income and other	1			—
Earnings Before Income Taxes	$	99		$	177
Depreciation and Amortization Expense
Refining	$	91		$	91
Retail	10			9
Corporate	2			3
Total Depreciation and Amortization Expense	$	103		$	103
Capital Expenditures
Refining	$	91		$	38
Retail	8			3
Corporate	3			1
Total Capital Expenditures	$	102		$	42

______________

(a) 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, excluding credits, totaled $99 million and $91 million for the three months ended March 31, 2012 and 2011.

	March 31,		December 31,
	2012		2011
Identifiable Assets:
Refining	$	8,236	$	8,152
Retail	703		644
Corporate	969		1,096
Total Assets	$	9,908	$	9,892

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Fair Value Measurements (Policies)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Financial Instruments [Policy Text Block]

We classify financial assets and financial liabilities into the following fair value hierarchy:

• level 1 - quoted prices in active markets for identical assets and liabilities;

• level 2 - quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability; and

• level 3 - unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

We measure fair value using level 1 inputs, when available, because they provide the most reliable evidence of fair value. Derivative instruments and our Renewable Identification Numbers (“RINs”) are our only financial assets and financial liabilities measured at fair value on a recurring basis. See Note F for further information on the Company's derivative instruments.

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Condensed Consolidating Financial Information, Statement of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Condensed Financial Statements, Captions [Line Items]
REVENUES (a)	$ 7,820		$ 6,526
Costs and expenses	7,686		6,307
OPERATING INCOME (LOSS)	134		219
Equity in earnings (loss) of subsidiaries	0		0
Other expense	(35)		(42)
EARNINGS (LOSS) BEFORE INCOME TAXES	99		177
Income tax expense (benefit) (a)	37	[1]	70	[2]
NET EARNINGS (LOSS)	62		107
Less net income attributable to noncontrolling interest	6		0
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	56		107
Total comprehensive income (loss)	62		107
Less noncontrolling interest in comprehensive income	6		0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	56		107
Tesoro Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
REVENUES (a)	0		0
Costs and expenses	2		4
OPERATING INCOME (LOSS)	(2)		(4)
Equity in earnings (loss) of subsidiaries	59		109
Other expense	(1)		0
EARNINGS (LOSS) BEFORE INCOME TAXES	56		105
Income tax expense (benefit) (a)	0	[1]	(2)	[2]
NET EARNINGS (LOSS)	56		107
Less net income attributable to noncontrolling interest	0
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	56
Total comprehensive income (loss)	56		107
Less noncontrolling interest in comprehensive income	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	56		107
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
REVENUES (a)	9,633		8,241
Costs and expenses	9,506		8,023
OPERATING INCOME (LOSS)	127		218
Equity in earnings (loss) of subsidiaries	(13)		(12)
Other expense	(32)		(40)
EARNINGS (LOSS) BEFORE INCOME TAXES	82		166
Income tax expense (benefit) (a)	35	[1]	71	[2]
NET EARNINGS (LOSS)	47		95
Less net income attributable to noncontrolling interest	0
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	47
Total comprehensive income (loss)	47		95
Less noncontrolling interest in comprehensive income	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	47		95
Non-Guarantors [Member]
Condensed Financial Statements, Captions [Line Items]
REVENUES (a)	596		688
Costs and expenses	587		683
OPERATING INCOME (LOSS)	9		5
Equity in earnings (loss) of subsidiaries	31		0
Other expense	(2)		(2)
EARNINGS (LOSS) BEFORE INCOME TAXES	38		3
Income tax expense (benefit) (a)	2	[1]	1	[2]
NET EARNINGS (LOSS)	36		2
Less net income attributable to noncontrolling interest	6
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	30
Total comprehensive income (loss)	36		2
Less noncontrolling interest in comprehensive income	6
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	30		2
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
REVENUES (a)	(2,409)		(2,403)
Costs and expenses	(2,409)		(2,403)
OPERATING INCOME (LOSS)	0		0
Equity in earnings (loss) of subsidiaries	(77)		(97)
Other expense	0		0
EARNINGS (LOSS) BEFORE INCOME TAXES	(77)		(97)
Income tax expense (benefit) (a)	0	[1]	0	[2]
NET EARNINGS (LOSS)	(77)		(97)
Less net income attributable to noncontrolling interest	0
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	(77)
Total comprehensive income (loss)	(77)		(97)
Less noncontrolling interest in comprehensive income	0
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	$ (77)		$ (97)

[1] 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.

[2] The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from subsidiaries.

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Tesoro Logistics LP (Notes)

3 Months Ended

Mar. 31, 2012

Initial Public Offering Subsidiary [Abstract]

TESORO LOGISTICS LP

TESORO LOGISTICS LP

Tesoro Logistics LP, is a publicly traded limited partnership that was formed to own, operate, develop and acquire logistics assets. Its assets are integral to the success of Tesoro's refining and marketing operations and are used to gather crude oil and distribute, transport and store crude oil and refined products. Prior to April 1, 2012, its assets consisted of a crude oil gathering system in the Bakken Shale/Williston Basin area of North Dakota and Montana, eight refined products terminals in the midwestern and western United States, and a crude oil and refined products storage facility and five related short-haul pipelines in Utah. Effective April 1, 2012, Tesoro contributed to TLLP the Martinez Crude Oil Marine Terminal and associated pipelines as discussed in Note O.

As of March 31, 2012, we owned a 52% interest in TLLP, including the 2% general partner interest. We are TLLP's primary beneficiary and therefore we consolidate TLLP into our financial results. Our interest includes 304,890 common units, 15,254,890 subordinated units and 622,649 general partner units as of March 31, 2012. All intercompany transactions with TLLP are eliminated in our consolidated balances.

TLLP generates revenue by charging fees for gathering, transporting and storing crude oil and for terminalling, transporting and storing refined products. We do not provide financial or equity support through any liquidity arrangements and/or financial guarantees to TLLP.

TLLP provides us with various pipeline transportation, trucking, terminal distribution and storage services under various long-term, fee-based commercial agreements expiring 2016 through 2021. Each agreement contains minimum volume commitments with the exception of the Salt Lake City storage and transportation services agreement. Each agreement, with the exception of the trucking transportation agreement, has fees that are indexed for inflation and provides us with options to renew for two additional five-year terms. The fees under the trucking transportation agreement are adjusted annually as a result of a competitive bidding process, and the agreement will renew automatically for onefive-year term unless earlier terminated by us or TLLP.

In addition weentered into an omnibus agreement which, among other things, addresses the payment of an annual fee to us, initially in the amount of $2.5 million, for the provision of various general and administrative services. Under the operational services agreement with TLLP, TLLP reimburses us for the provision of certain operational services in support of their pipelines, terminals and storage facility.

Effective March 30, 2012, TLLP amended its senior secured revolving credit agreement (“TLLP Revolving Credit Facility”) with a syndicate of banks and financial institutions. TLLP is an excluded subsidiary under our Revolving Credit Facility. For additional information regarding our credit facilities and the TLLP Revolving Credit Facility amendment, see Note G.

TLLP is a consolidated variable interest entity. With the exception of affiliate balances, which are eliminated in consolidation, and their impact on equity, the TLLP condensed consolidated balance sheets as of March 31, 2012 and December 31, 2011, as presented below, are included in the condensed consolidated balance sheets of Tesoro Corporation.

	March 31, 2012		December 31, 2011
	(In millions)
ASSETS
Cash and cash equivalents	$	21	$	18
Receivables, less allowance for doubtful accounts
Trade	1		1
Affiliate	8		11
Other Current Assets	—		1
Net Property, Plant and Equipment	137		136
Other Noncurrent Assets	2		3
Total Assets	$	169	$	170
LIABILITIES AND EQUITY
Accounts payable
Trade	$	4	$	6
Affiliate	3		3
Deferred revenue - affiliate	2		1
Accrued liabilities	—		1
Debt	50		50
Equity	110		109
Total Liabilities and Equity	$	169	$	170

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Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (Tesoro Corporation Stockholders' Equity [Member], USD $)	Mar. 31, 2012	Dec. 31, 2011
Tesoro Corporation Stockholders' Equity [Member]
TESORO CORPORATION STOCKHOLDERS' EQUITY
Common stock, par value	$ 0.167	$ 0.167
Common stock, authorized shares	200,000,000	200,000,000
Common stock, shares issued	151,682,254	150,733,991
Preferred stock, no par value	$ 0	$ 0
Preferred stock, authorized shares	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Treasury stock, common shares	11,160,098	10,769,510

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Stock-Based Compensation (Notes)

3 Months Ended

Mar. 31, 2012

Stock Based Compensation [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION

Stock-based compensation expense included in our condensed statements of consolidated operations was as follows (in millions):    

	Three Months Ended
	March 31,
	2012		2011
Stock appreciation rights	$	12	$	35
Phantom stock options	—		11
Market stock units	3		—
Performance share awards	2		—
Other stock-based awards	4		2
Total Stock-Based Compensation Expense	$	21	$	48

We have aggregated expenses for certain award types as they are not considered significant. The income tax effect recognized in the income statement for stock-based compensation was a $8 million and a $18 million benefit for the three months ended March 31, 2012 and 2011, respectively. The income tax benefit recognized from tax deductions resulting from exercises and vestings under all of our stock-based compensation arrangements totaled $10 million for both the three months ended March 31, 2012 and 2011.

Stock Appreciation Rights

A stock appreciation right (“SAR”) entitles an employee to receive cash in an amount equal to the excess of the fair market value of one share of common stock on the date of exercise over the grant price of the SAR. The fair value of each SAR is estimated at the end of each reporting period using the Black-Scholes option-pricing model. We did not grant SARs to our employees during the three months ended March 31, 2012. We paid cash of $9 million to settle approximately 629,000 SARs that were exercised during the three months ended March 31, 2012. We had $58 million and $55 million recorded in accrued liabilities associated with our SARs awards at March 31, 2012 and December 31, 2011, respectively.

Market Stock Units

We granted market stock units under the 2011 Long-Term Incentive Plan (“2011 Plan”) in February 2012. These market stock units represent the right to receive a target number of shares that will vest at the end of a three-year performance period. The number of shares ultimately issued will be based on Tesoro's stock price changes over the performance period. The market stock units' potential payout can range from 50-200% of targeted award value, unless the average closing stock price at vesting has decreased more than 50% from the average closing stock price at the grant date, then no market stock units will be paid out. The

fair value of each market stock unit is estimated on the grant date using a Monte Carlo simulation model. The estimated fair value of these market stock units is amortized over a three-year vesting period using the straight-line method. As of March 31, 2012, the estimated weighted average payout percentage for these awards was 115%. Total unrecognized compensation cost related to non-vested market stock units totaled $28 million as of March 31, 2012, which is expected to be recognized over a weighted average period of 2.6 years.

A summary of our market stock unit award activity, assuming a 100% payout, is set forth below (units in thousands):

	Number of Units		Weighted Average Grant-Date Fair Value		Intrinsic Value
					(In millions)
Nonvested at January 1, 2012	424		$	34.22	$	9
Granted	665		$	33.93
Forfeited	(11	)	$	34.29
Nonvested at March 31, 2012	1,078		$	34.04	$	33

Performance Share Awards

Performance Conditions

We granted performance condition performance share awards under the 2011 Plan in February 2012. The vesting percentages of these equity awards, range from 0-200%, and are tied to performance conditions over a three-year period. These performance share awards vest at the end of the performance period. The fair value of performance share awards tied to performance measures is estimated using the market price of our common stock on the grant date. The estimated fair value of these performance share awards is amortized over a three-year vesting period using the straight-line method. The value of the award ultimately paid will be based on return on capital employed, which is measured against the performance peer group.

Market Conditions

We granted market condition performance share awards under the 2011 Plan in February 2012. The vesting percentages of these equity awards, range from 0-200%, and are tied to market conditions over a three-year performance period. These performance share awards vest at the end of the performance period. The fair value of each performance share award is estimated using a Monte Carlo simulation model and is estimated at the end of each reporting period. The estimated fair value of these performance share awards is amortized over a three-year vesting period using the straight-line method. The value of the award ultimately paid will be based on relative total shareholder return, which is measured against the performance peer group and the S&P 500 Index.

Total unrecognized compensation cost related to all non-vested performance share awards totaled $16 million as of March 31, 2012, which is expected to be recognized over a weighted average period of 2.5 years. As of March 31, 2012, the estimated weighted average payout percentage for these awards was approximately 103%. A summary of our performance share award activity, assuming a 100% payout, is set forth below (shares in thousands):

	Number of Shares		Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2012	274		$	31.53
Granted	380		$	30.98
Forfeited	(3	)	$	31.90
Nonvested at March 31, 2012	651		$	31.20

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Document and Entity Information	3 Months Ended
	Mar. 31, 2012	Apr. 27, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	TESORO CORP /NEW/
Entity Central Index Key	0000050104
Document Type	10-Q
Document Period End Date	Mar. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		140,333,989

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Operating Segments (Notes)

3 Months Ended

Mar. 31, 2012

Operating Segments [Abstract]

OPERATING SEGMENTS [Text Block]

OPERATING SEGMENTS

The Company's revenues are derived from two operating segments, refining and retail. We own and operate seven petroleum refineries located in California, Washington, Alaska, Hawaii, North Dakota and Utah. These refineries manufacture gasoline and gasoline blendstocks, jet fuel, diesel fuel, residual fuel oil and other refined products. We sell these refined products, together with refined products purchased from third-parties, at wholesale through terminal facilities and other locations. Our refining segment also sells refined products to unbranded marketers and occasionally exports refined products to foreign markets. Our retail segment sells gasoline, diesel fuel and convenience store items through company-operated retail stations and branded jobber/dealers in 18 states. We do not have significant operations in foreign countries. Therefore, revenue in foreign countries and long-lived assets located in foreign countries are not material to our operations.

We evaluate the performance of our segments based primarily on segment operating income. Segment operating income includes those revenues and expenses that are directly attributable to management of the respective segment. Intersegment sales from refining to retail are made at prevailing market rates. Income taxes, other income, foreign currency exchange gain (loss), interest and financing costs, interest income, corporate depreciation and corporate general and administrative expenses are excluded from segment operating income. Identifiable assets are those used by the segments, whereas corporate assets are principally cash and other assets that are not associated with a specific operating segment.

Segment information is as follows:

	Three Months Ended
	March 31,
	2012			2011
Revenues	(In millions)
Refining:
Refined products	$	7,562		$	6,270
Crude oil resales and other	156			155
Retail:
Fuel (a)	1,306			1,115
Merchandise and other	55			52
Intersegment sales from Refining to Retail	(1,259		)	(1,066		)
Total Revenues	$	7,820		$	6,526
Segment Operating Income (Loss)
Refining	$	191		$	303
Retail	(4		)	2
Total Segment Operating Income	187			305
Corporate and unallocated costs	(53		)	(86		)
Operating Income	134			219
Interest, financing and other costs	(36		)	(42		)
Interest income and other	1			—
Earnings Before Income Taxes	$	99		$	177
Depreciation and Amortization Expense
Refining	$	91		$	91
Retail	10			9
Corporate	2			3
Total Depreciation and Amortization Expense	$	103		$	103
Capital Expenditures
Refining	$	91		$	38
Retail	8			3
Corporate	3			1
Total Capital Expenditures	$	102		$	42

______________

(a) 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, excluding credits, totaled $99 million and $91 million for the three months ended March 31, 2012 and 2011.

	March 31,		December 31,
	2012		2011
Identifiable Assets:
Refining	$	8,236	$	8,152
Retail	703		644
Corporate	969		1,096
Total Assets	$	9,908	$	9,892

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Condensed Statements of Consolidated Operations and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
REVENUES (a)	$ 7,820		$ 6,526
COSTS AND EXPENSES:
Cost of sales (a)	7,168		5,735
Operating expenses	347		371
Selling, general and administrative expenses	62		95
Depreciation and amortization expense	103		103
Loss on asset disposals and impairments	6		3
OPERATING INCOME	134		219
Interest, financing and other costs	(36)		(42)
Interest income and other	1		0
EARNINGS BEFORE INCOME TAXES	99		177
Income tax expense	37	[1]	70	[2]
NET EARNINGS	62		107
Less net income attributable to noncontrolling interest	6		0
NET EARNINGS ATTRIBUTABLE TO TESORO CORPORATION	56		107
NET EARNINGS PER SHARE:
Basic	$ 0.40		$ 0.76
Diluted	$ 0.39		$ 0.74
WEIGHTED AVERAGE COMMON SHARES:
Basic	139.5		141.6
Diluted	141.8		144.0
COMPREHENSIVE INCOME
Total comprehensive income	62		107
Less noncontrolling interest in comprehensive income	6		0
COMPREHENSIVE INCOME ATTRIBUTABLE TO TESORO CORPORATION	56		107
SUPPLEMENTAL INFORMATION:
(a) Includes excise taxes collected by our retail segment (excluding credits)	$ 99		$ 91

[1] 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.

[2] The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from subsidiaries.

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Debt (Notes)

3 Months Ended

Mar. 31, 2012

Long-term Debt, Unclassified [Abstract]

DEBT

DEBT

Our total debt at March 31, 2012 and December 31, 2011, was comprised of the following (in millions):

Debt, including current maturities:	March 31, 2012		December 31, 2011
Tesoro Corporation Revolving Credit Facility	$	—	$	—
Tesoro Panama Company S.A. (“TPSA”) Revolving Credit Facility	90		117
TLLP Revolving Credit Facility	50		50
6¼% Senior Notes Due 2012	299		299
65/8% Senior Notes Due 2015	450		450
6½% Senior Notes Due 2017	473		473
9¾% Senior Notes Due 2019 (net of unamortized discount of $9 million)	291		291
Capital Lease Obligations and Other	21		21
Total Debt	$	1,674	$	1,701

For additional information regarding our outstanding debt, see “Capital Resources and Liquidity” in Management's Discussion and Analysis of Financial Condition and Results of Operations in Item 2.

From time to time, we may purchase our Senior Notes in the open market or in privately negotiated transactions. The timing and amount of repurchases, if any, will depend on available cash, market conditions and other considerations.

Credit Facilities Overview

Our credit facilities as of March 31, 2012, were subject to the following expenses and fees.

Credit Facility	30 day Eurodollar (LIBOR) Rate	Eurodollar Margin	Base Rate	Base Rate Margin	Commitment Fee (unused portion)
Tesoro Corporation Revolving Credit Facility ($1.85 billion) (a)	0.24%	1.75%	3.25%	0.75%	0.375%
TPSA Revolving Credit Facility ($500 million) (a)	0.24%	2.75%	3.25%	1.75%	N/A
TLLP Revolving Credit Facility ($300 million) (a)	0.24%	2.50%	3.25%	1.50%	0.50%

________________

(a) We have the option to elect if the borrowings will bear interest at either a base rate plus the base rate margin, or a Eurodollar rate, for the applicable period, plus, the Eurodollar margin at the time of the borrowing. Letters of credit outstanding under the Tesoro Corporation Revolving Credit Facility and the TPSA Revolving Credit Facility incur fees at the Eurodollar margin rate and the base rate margin, respectively.

Tesoro Corporation Revolving Credit Facility (“Revolving Credit Facility”)

The Revolving Credit Facility is guaranteed by substantially all of Tesoro's active domestic subsidiaries, excluding Tesoro Logistics GP (“TLGP”) and TLLP and its subsidiaries, and is secured by substantially all of the crude oil and refined product inventories, cash and receivables of Tesoro's active domestic subsidiaries. TPSA is also not a guarantor of the Revolving Credit Facility. For additional information regarding TLLP, see Note B.

At March 31, 2012, our Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base of approximately $3.5 billion, consisting of Tesoro's eligible cash and cash equivalents, receivables and petroleum inventories (based upon a West Texas Intermediate crude oil price of $107 per barrel), net of the standard reserve as defined, or the Revolving Credit Facility's total capacity of $1.85 billion. The total available capacity can be increased up to an aggregate amount of $2.25 billion, subject to receiving increased commitments. As of March 31, 2012, we had no borrowings and $1.03 billion in letters of credit outstanding under the Revolving Credit Facility, resulting in total unused credit availability of approximately $819 million or 44% of the eligible borrowing base.

Our committed Revolving Credit Facility is scheduled to mature on March 16, 2016. The Revolving Credit Facility will terminate if the Company does not (a) refinance or pay in full, the Company's 6 1/4% notes due November 2012 on or prior to the stated maturity date, or (b) refinance or pay in full, the Company's 6 5/8% notes due November 2015 on or prior to the stated maturity date.

Our Revolving Credit Agreement and senior notes each limit our restricted payments (as defined) including our ability to pay cash dividends, repurchase stock or make voluntary repayments of subordinate debt. The aggregate amount of restricted payments cannot exceed an amount defined in each of the debt agreements. The indentures for our senior notes also limit our subsidiaries ability to make certain payments and distributions.

Letter of Credit Agreements

The Revolving Credit Facility allows us to obtain letters of credit under separate letter of credit agreements for foreign crude oil purchases. As of March 31, 2012, our four separate uncommitted letter of credit agreements had $445 million outstanding. Letters of credit outstanding under these agreements incur fees and are secured by the petroleum inventories for which they are issued. Capacity under these letter of credit agreements is available on an uncommitted basis and can be terminated by either party, at any time.

TPSA Revolving Credit Facility

TPSA, a directly and wholly owned subsidiary of Tesoro, entered into a 364-day uncommitted, secured revolving credit agreement in October 2011. TPSA is an unrestricted subsidiary under Tesoro's outstanding indentures. The TPSA Revolving Credit Facility is non-recourse to Tesoro and is guaranteed by TPSA's assets. The TPSA Revolving Credit Facility includes two uncommitted facilities, which provide for revolving borrowings, swing line loans and daylight overdraft loans and letters of credit.

The maximum capacity of these facilities as of March 31, 2012, was $500 million, consisting of $350 million under the first facility and $150 million under the second facility. Our total capacity under the TPSA facilities can be further increased up to $700 million provided the facilities' maximum amounts do not exceed $550 million and $350 million, respectively. At March 31, 2012, our TPSA Revolving Credit Facility provided for borrowings (including letters of credit) up to the lesser of the amount of a periodically adjusted borrowing base consisting of TPSA eligible receivables and petroleum inventories, net of reserves, or the agreement's capacity based on the net worth of TPSA. We had $90 million in borrowings outstanding under this agreement and letters of credit outstanding of $38 million at March 31, 2012.

TLLP Revolving Credit Facility

TLLP amended the TLLP Revolving Credit Facility effective March 30, 2012. Concurrent with the execution of the amendment, and pursuant to the terms of the original agreement, TLLP exercised its option to increase the total loan availability under the TLLP Credit Agreement from $150 million to an aggregate of $300 million. The amendment allows TLLP to request that the availability be increased up to an aggregate of $450 million, subject to receiving increased commitments from the lenders, compared to the original agreement which allowed an aggregate capacity of $300 million. TLLP had $50 million in borrowings outstanding under this facility at March 31, 2012.

The TLLP Revolving Credit Facility is non-recourse to Tesoro, except for TLGP, and is guaranteed by all of TLLP’s subsidiaries and secured by substantially all of TLLP's assets. Borrowings available under the TLLP Revolving Credit Facility are up to the total available revolving capacity of the facility. The TLLP Revolving Credit Facility is scheduled to mature on April 25, 2014

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Derivative Instruments (Notes)

3 Months Ended

Mar. 31, 2012

Derivative Instruments and Hedges, Assets [Abstract]

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS

The timing, direction and overall change in refined product prices versus crude oil prices impacts profit margins and has a significant impact on our earnings and cash flows. Consequently, we use non-trading derivative instruments to manage exposure to commodity price risks associated with the purchase or sale of feedstocks, products and energy supplies to or from the Company's refineries, terminals, retail operations and customers. We also use non-trading derivative instruments to manage price risks associated with inventories above or below our target levels. To achieve our objectives, we use derivative instruments such as Futures Contracts, OTC Swap Contracts and Forward Contracts, all generally with maturity dates of less than two years. We believe that there is minimal credit risk with respect to our counterparties.

We may use our excess storage capacity in Panama to take advantage of contango markets when the future price of crude oil is higher than the current spot price. We use commodity derivatives to manage price risk and hedge crude oil held in connection with these arbitrage opportunities.

We are exposed to exchange rate fluctuations on our purchases of Canadian crude oil. We enter into forward contracts of Canadian dollars to manage monthly exchange rate fluctuations.

The accounting for changes in the fair value of a commodity derivative depends on whether the derivative has been designated in a hedging relationship and whether we have elected the normal purchases and normal sales exception. The accounting for the change in fair value can be summarized as follows:

Derivative Treatment	Accounting Method
Normal purchases and normal sales exception	Accrual accounting
Designated in qualifying hedging relationship	Hedge accounting
All other derivatives	Mark-to-market accounting

The primary derivative instruments that we use have the following characteristics. Futures Contracts include a requirement to buy or sell the commodity at a fixed price in the future. OTC Swap Contracts and Forward Contracts require cash settlement for the commodity based on the difference between a fixed or floating price and the market price on the settlement date. Certain of these contracts require cash collateral if our liability position exceeds specified thresholds. At March 31, 2012, we had no cash collateral outstanding related to our OTC Swap Contracts.

The following table presents the fair value (in millions) of our derivative instruments as of March 31, 2012 and December 31, 2011. The fair value amounts below are presented on a gross basis and do not reflect the netting of asset and liability positions permitted under the terms of our master netting arrangements including cash collateral on deposit with or received from brokers. We have elected to offset the recognized fair value amounts for multiple derivative instruments executed with the same counterparty in our financial statements. As a result, the asset and liability amounts below will not agree with the amounts presented in our consolidated balance sheet.

		Derivative Assets						Derivative Liabilities
	Balance Sheet Location	March 31, 2012			December 31, 2011			March 31, 2012			December 31, 2011
Mark-to-Market Derivatives (a):
Commodity Futures Contracts	Other Current Assets	$	181		$	95		$	171		$	136
Commodity OTC Swap Contracts	Receivables	1			1			—			—
Commodity OTC Swap Contracts	Accounts Payable	—			2			3			3
Commodity Forward Contracts	Receivables	—			4			—			—
Commodity Forward Contracts	Accounts Payable	—			—			—			1
Total Gross Mark-to-Market Derivatives		182			102			174			140
Less: Counterparty Netting and Cash Collateral (b)		(154		)	(63		)	(172		)	(138		)
Total Net Fair Value of Derivatives		$	28		$	39		$	2		$	2

________________

(a) The above fair values are presented as gross amounts, including when the derivatives are subject to master netting arrangements and qualify for net presentation in the consolidated balance sheet.

(b) As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market commodity future contracts.

Gains (losses) for our mark-to market derivatives for the three months ended March 31, 2012 and 2011, were as follows (in millions):

	Three Months Ended
	March 31,
Mark-to-Market Derivatives:	2012			2011
Commodity Futures Contracts	$	(12	)	$	(56	)
Commodity OTC Swap Contracts	(6		)	(1		)
Commodity Forward Contracts	(3		)	7
Foreign Currency Forward Contracts	1			1
Total Mark-to-Market Derivatives	$	(20	)	$	(49	)

The income statement location of gains (losses) for our mark-to market derivatives above were as follows (in millions):

	Three Months Ended
	March 31,
Income Statement Location:	2012			2011
Revenues	$	(10	)	$	(16	)
Cost of sales	(11		)	(34		)
Interest, financing and other costs	1			1
Total Loss on Mark-to-Market Derivatives	$	(20	)	$	(49	)

Losses on our derivatives designated for hedge accounting during the three months ended March 31, 2012, were as follows (in millions).

Derivatives Designated for Hedge Accounting:	Amount of Loss Recognized in Income on Derivatives			Amount of Loss Recognized in Income on Hedged Item		Amount of Loss Recognized in Income on Ineffective Portion of Derivative (b)
Three months ended March 31, 2012
Commodity Futures Contracts (a)	$	—		$	—	$	—
Three months ended March 31, 2011
Commodity Futures Contracts (a)	$	(1	)	$	—	$	(1	)

________________

(a) Losses recognized in income on the derivative and the hedged item are included in cost of sales in the statements of consolidated operations.

(b) For fair value hedges, no component of the derivative instruments' gains or losses was excluded from the assessment of hedge effectiveness. No amounts were recognized in income for hedged firm commitments that no longer qualify as fair value hedges.

Open Long (Short) Positions

All of our open positions are scheduled to mature within two years. As of March 31, 2012, we had an open forward contract to purchase CAD $44 million that matured on April 25, 2012. The information below presents the net volume of outstanding commodity contracts by type of instrument and year of maturity as of March 31, 2012 (volumes in thousands of barrels):

Derivatives Designated for Hedge Accounting		Mark-to-Market Derivatives
Derivative instrument and Year of maturity	Long (Short) Contract Volumes	Derivative instrument and Year of maturity	Long (Short) Contract Volumes
Swaps		Swaps
2012	—	2012	1,021
2013	—	2013	—
Futures		Futures
2012	—	2012	(3,734)
2013	—	2013	(50)
Forwards		Forwards
2012	—	2012	—

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Inventories Inventories (Policies)

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Inventory, Policy [Policy Text Block]

We use the last-in, first-out (“LIFO”) cost method as the primary method to determine the cost of crude oil held by our U.S. subsidiaries (“Domestic crude oil”) and refined product inventories in our refining and retail segments. We determine the carrying value of inventories of crude oil held by our foreign subsidiaries (“Foreign subsidiary crude oil”), oxygenates, and by-products using the first-in, first-out (“FIFO”) cost method.

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Acquisition (Notes)

3 Months Ended

Mar. 31, 2012

Acquisition [Abstract]

AQUISITION [Text Block]

ACQUISITION

Retail Acquisition

In January 2012, we acquired 49 retail stations located primarily in Washington, Oregon, California, Nevada, Idaho, Utah and Wyoming, from SUPERVALU, Inc. We paid approximately $37 million for the assets, including inventories of approximately $3 million. We assumed the obligations under the seller's leases and other agreements arising after the closing date. SUPERVALU, Inc. retained certain pre-closing liabilities, including environmental matters. We have spent approximately $4 million to replace the dispensers at these stations. This acquisition added ratable and profitable supply outlets for our refined products, further strengthening our refining and marketing integration.

Pro forma information has not been presented for the acquisition as it is not material to our consolidated financial statements.

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Commitments and Contingencies (Notes)

3 Months Ended

Mar. 31, 2012

Commitments And Contingencies [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Environmental and Tax Matters

We are a party to various litigation and contingent loss situations, including environmental and income tax matters, arising in the ordinary course of business. Although we cannot predict the ultimate outcomes of these matters with certainty, we have accrued for the estimated liabilities, when appropriate. We believe that the outcome of these matters will not have a material impact on our liquidity or financial position, although the resolution of certain of these matters could have a material impact on our interim or annual results of operations. Additionally, if applicable, we accrue receivables for probable insurance or other third-party recoveries.

We are subject to extensive federal, state and local environmental laws and regulations. These laws, which change frequently, regulate the discharge of materials into the environment and may require us to remove or mitigate the environmental effects of the disposal or release of petroleum or chemical substances at various sites, install additional controls, or make other modifications to certain emission sources, equipment or facilities.

We are subject to extensive federal, state and foreign tax laws and regulations. Newly enacted tax laws and regulations, and changes in existing tax laws and regulations, could result in increased expenditures in the future. We are also subject to audits by federal, state and foreign taxing authorities in the normal course of business. It is possible that tax audits could result in claims against us in excess of recorded liabilities. We believe that resolution of any such claim(s) would not have a material impact on our financial position, results of operations and liquidity. We do not expect our unrecognized tax benefits to change significantly over the next twelve months.

Environmental Liabilities

We are incurring and expect to continue to incur expenses for environmental liabilities at a number of currently and previously owned or operated refining, pipeline, terminal and retail station properties. We have accrued liabilities for these expenses and believe these accruals are adequate based on current information and projections that can be reasonably estimated. Our environmental accruals are based on estimates including engineering assessments, and it is possible that our projections will change and that additional costs will be recorded as more information becomes available.

At both March 31, 2012 and December 31, 2011, our accruals for environmental expenditures totaled $93 million. These accruals include $55 million for both periods, related to environmental liabilities for site cleanup activities assumed from a prior owner, arising from operations at our Martinez refinery prior to August 2000. Certain projects at the Martinez refinery are subject to a cost-share agreement where we are responsible for 75% of the expenditures. Approximately $46 million of our obligations are related to this agreement. We cannot reasonably determine the full extent of remedial activities that may be required at the Martinez refinery. Therefore, it is possible that we will identify additional investigation and remediation costs as more information becomes available. We have filed insurance claims under environmental insurance policies that provide coverage up to $190 million for expenditures in excess of $50 million in self-insurance, but the insurer has challenged coverage and filed a declaratory relief action in federal court. We have not recognized possible insurance recoveries related to this matter.

We have investigated conditions at certain active wastewater treatment units at our Martinez refinery.  The investigation was driven by an order received in 2004 from the San Francisco Bay Regional Water Quality Control Board. The order named us as well as two previous owners of the Martinez refinery.  We cannot currently estimate the amount of the ultimate resolution of the order, but we believe it will not have a material adverse impact on our financial position, results of operations or liquidity.

Washington Refinery Fire

The naphtha hydrotreater unit at our Washington refinery was involved in a fire in April 2010, which fatally injured seven employees and rendered the unit inoperable. The Washington State Department of Labor & Industries (“L&I”), the U.S. Chemical Safety and Hazard Investigation Board (“CSB”) and the EPA initiated separate investigations of the incident. L&I completed its investigation in October 2010, issued citations and assessed a $2.4 million fine, which we appealed. L&I reassumed jurisdiction of the citation and affirmed the allegations in December 2010. We disagree with L&I's characterizations of operations at our Washington refinery and believe, based on available evidence and scientific reviews, that many of the agency's conclusions are mistaken. We filed an appeal of the citation in January 2011. The EPA and CSB investigations are ongoing.

In February 2011, Tesoro Corporation, Tesoro Refining and Marketing Company and other defendants were named in a lawsuit brought by the estates and families of the seven fatally injured employees arising from the April 2010 incident at our Washington refinery. In addition, a third-party truck driver has alleged damages in the lawsuit. The lawsuit includes allegations of negligence, premises liability, strict liability, product liability and seeks unspecified compensatory and punitive damages. This case, Donald and Peggy Zimmerman et al. v. Tesoro Corporation and Tesoro Refining and Marketing et al., is proceeding in the Superior Court of the State of Washington, Skagit County. The Company believes that it has defenses to the allegations contained in the lawsuit. While we cannot currently estimate the amount or timing of the resolution of this matter, and currently believe that the outcome of this matter will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations.

Our business interruption insurance deductible is satisfied after we have exceeded both 60 days of operational disruption and $25 million in losses primarily based on the operating plan that existed prior to the incident. We have filed business interruption insurance claims and collected $87 million in business interruption insurance recoveries in 2010 and 2011. As of March 31, 2012, certain business interruption claims remain open.

Other Matters

In the ordinary course of business, we become party to lawsuits, administrative proceedings and governmental investigations, including environmental, regulatory and other matters. Large, and sometimes unspecified, damages or penalties may be sought from us in some matters. We have not established accruals for these matters unless a loss is probable and the amount of loss is currently estimable. On the basis of existing information, we believe that the resolution of these matters, individually or in the aggregate, will not have a material adverse impact on our financial position, results of operations or liquidity.

Legal

We are a defendant, along with other manufacturing, supply and marketing defendants, in three remaining lawsuits alleging methyl tertiary butyl ether (“MTBE”) contamination in groundwater. The defendants are being sued for having manufactured MTBE and having manufactured, supplied and distributed gasoline containing MTBE. The plaintiffs in the remaining cases, all in California, are municipalities and governmental authorities. The plaintiffs allege, in part, that the defendants are liable for manufacturing or distributing a defective product. The suits generally seek individual, unquantified compensatory and punitive damages and attorney's fees. We intend to vigorously assert our defenses against these claims. While we cannot currently estimate the amount or timing of the resolution of the remaining matters, we have established an accrual for this matter and believe that the outcome will not have a material impact our financial position, results of operations or liquidity.

During 2009, Chevron filed a lawsuit against us claiming they are entitled to a share of the refunds we received in 2008 from the owners of the Trans Alaska Pipeline System (“TAPS”). We received $50 million in 2008, net of contingent legal fees, for excessive intrastate rates charged by TAPS during 1997 through 2000, and the period of 2001 through June 2003. Chevron is asserting that it is entitled to a share of its portion of the refunds for retroactive price adjustments under our previous crude oil contracts with them. The trial court judge granted Chevron's motion for summary judgment and awarded them $16 million, including interest in September 2010. We disagree with the trial court and have appealed the decision to the Alaska Supreme Court in which the proceeding is now pending. We have established an accrual for this matter and believe that the outcome will not have a material impact on our financial position, results of operations or liquidity.

Environmental

The EPA has alleged that we have violated certain Clean Air Act regulations at our Alaska, Washington, Martinez, Hawaii and Utah refineries. We are continuing discussions of the EPA's claims with the EPA and the U.S. Department of Justice (“DOJ”). We previously received a notice of violation (“NOV”) in March 2011 from the EPA alleging violations of Title V of the Clean Air Act at our Alaska refinery. The alleged violations in the NOV arise from a 2007 state of Alaska inspection and inspections by the EPA in 2008 and 2010. We also previously received NOV's in 2005 and 2008 alleging violations of the Clean Air Act at our Washington refinery. We are evaluating all of these allegations. The ultimate resolution of these matters could require us to incur material capital expenditures and/or civil penalties. While we cannot currently estimate the amount or timing of the resolution of these matters, and currently believe that the outcome of these matters will not have a material impact on our liquidity or financial position, the ultimate resolution could have a material impact on our interim or annual results of operations

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Stock-Based Compensation, Summary of Stock-Based Compensation Expense (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 21	$ 48
Income tax benefit for stock-based compensation arrangements	8	18
Tax benefit realized from exercise of stock-based compensation arrangements	10	10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Granted	1,000,000
Stock appreciation rights [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	12	35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Cash paid to settle awards	9
Number of awards settled	629,000
Stock based compensation liability	58		55
Phantom stock options [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0	11
Market Stock Units [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3	0
Payout Percentage Assumption	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding at January 1, 2012	424,000
Granted	665,000
Forfeited	(11,000)
Outstanding at March 31, 2012	1,078,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Weighted Average Grant-Date Fair Value, Nonvested at January 1, 2012	$ 34.22
Weighted Average Grant-Date Fair Value, Granted	$ 33.93
Weighted Average Grant-Date Fair Value, Forfeited	$ 34.29
Weighted Average Grant-Date Fair Value, Nonvested at March 31, 2012	$ 34.04
Market condition market stock units	50.00%
Total unrecognized compensation cost related to unvested awards	28
Total unrecognized compensation cost, period for recognition	2.6
Intrinsic Value	$ 33,000,000		$ 9,000,000
Award vesting period	3
Weighted average payout percentage	115.00%
Market Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Vesting percentages of stock based compensation arrangements	50.00%
Market Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Vesting percentages of stock based compensation arrangements	200.00%
Performance Share Awards [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2	0
Payout Percentage Assumption	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding at January 1, 2012	274,000
Granted	380,000
Forfeited	(3,000)
Outstanding at March 31, 2012	651,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Weighted Average Grant-Date Fair Value, Nonvested at January 1, 2012	$ 31.53
Weighted Average Grant-Date Fair Value, Granted	$ 30.98
Weighted Average Grant-Date Fair Value, Forfeited	$ 31.90
Weighted Average Grant-Date Fair Value, Nonvested at March 31, 2012	$ 31.20
Total unrecognized compensation cost related to unvested awards	16
Total unrecognized compensation cost, period for recognition	2.5
Award vesting period	3
Weighted average payout percentage	103.00%
Performance Share Awards [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Vesting percentages of stock based compensation arrangements	0.00%
Performance Share Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Vesting percentages of stock based compensation arrangements	200.00%
Other stock-based awards [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 4	$ 2

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Property, Plant and Equipment (Notes)

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment, at cost, is as follows (in millions):

	March 31, 2012			December 31, 2011
Refining	$	6,247		$	6,161
Retail	717			679
Corporate	216			215
Property, plant and equipment, at cost	7,180			7,055
Accumulated depreciation	(1,968		)	(1,907		)
Net property, plant and equipment	$	5,212		$	5,148

We capitalize interest as part of the cost of major projects during the construction period. Capitalized interest totaled $4 million for both the three months ended March 31, 2012 and 2011, and is recorded as a reduction to interest and financing costs.

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Benefit Plans (Notes)

3 Months Ended

Mar. 31, 2012

Benefit Plans [Abstract]

BENEFIT PLANS

BENEFIT PLANS

Tesoro sponsors the following four defined benefit pension plans: the funded qualified employee retirement plan, the unfunded nonqualified executive security plan, the unfunded nonqualified restoration retirement plan and the unfunded nonqualified supplemental executive retirement plan. Although our funded employee retirement plan fully meets all funding requirements under applicable laws and regulations, during the three months ended March 31, 2012, we voluntarily contributed $12 million to improve the funded status of the plan.

The components of pension benefit expense and other postretirement benefit expense included in the condensed statements of consolidated operations for the three months ended March 31, 2012 and 2011, were (in millions):

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2012			2011			2012			2011
Service cost	$	7		$	7		$	1		$	1
Interest cost	7			7			1			1
Expected return on plan assets	(6		)	(5		)	—			—
Amortization of prior service credit	—			—			(9		)	(9		)
Recognized net actuarial loss	6			5			3			3
Recognized curtailment loss	—			2			—			—
Net Periodic Benefit Expense (Income)	$	14		$	16		$	(4	)	$	(4	)

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Stockholders' Equity (Notes)

3 Months Ended

Mar. 31, 2012

Stockholders' Equity Attributable to Parent [Abstract]

STOCKHOLDERS' EQUITY [Text Block]

STOCKHOLDERS' EQUITY

See Note L for information relating to stock-based compensation and common stock reserved for exercise of options. Changes to equity during the three months ended March 31, 2012, are presented below:

	Tesoro Corporation Stockholders' Equity			Noncontrolling Interest			Total Equity
Balance at December 31, 2011	$	3,668		$	310		$	3,978
Net earnings	56			6			62
Shares issued for equity-based compensation awards	15			—			15
Excess tax benefits from stock-based compensation arrangements	3			—			3
Amortization of equity settled awards	7			—			7
Purchases of common stock	(10		)	—			(10		)
Distributions to noncontrolling interest	—			(6		)	(6		)
Balance at March 31, 2012	$	3,739		$	310		$	4,049

We issued 0.9 million and 1.6 million shares primarily for stock option exercises under our equity-based compensation plans during the three months ended March 31, 2012 and twelve months ended December 31, 2011, respectively. 

During 2011, our Board of Directors approved a program designed to offset the dilutive effect of future stock-based compensation awards. We entered into a program to purchase approximately 1 million shares during 2012 to offset the impact of 2012 stock-based compensation awards grants.  We purchased 321,000 shares of common stock at a weighted average price of $28.22 per share for approximately $9 million during the three months ended March 31, 2012, for this program.

Our Revolving Credit Agreement and senior notes each limit our ability to pay cash dividends or repurchase stock. The limitation in each of our debt agreements is based on limits on restricted payments (as defined in our debt agreements), which include dividends, stock repurchases or voluntary prepayments of subordinate debt. The aggregate amount of restricted payments cannot exceed an amount defined in each of the debt agreements. The indentures for our senior notes also limit our subsidiaries ability to make certain payments and distributions. We do not believe that the limitations will restrict our ability to pay dividends or repurchase stock under our current programs.

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Condensed Consolidating Financial Information, Narrative (Details)	3 Months Ended
	Mar. 31, 2012
6 1/4% Senior note [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6 1/4
Year of maturity	2012
6 5/8% Senior note [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6 5/8
Year of maturity	2015
6 1/2% Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6 1/2
Year of maturity	2017
9 3/4% Senior note [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	9 3/4
Year of maturity	2019

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Condensed Consolidating Financial Information, Guarantors and Non-Guarantors (Details) (Guarantor subsidiaries [Member])	3 Months Ended
	Mar. 31, 2012
Guarantor subsidiaries [Member]
Related Party Transaction [Line Items]
Subsidiary or equity method investee, cumulative percentage ownership after all transactions	100.00%

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Acquisition Aquisition (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 stores
Business Acquisition [Line Items]
Number of stations	49
Cost of acquired assets	$ 37
Value of inventory acquired	3
Payments to replace dispensers at stations	$ 4

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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2012

Stockholders' Equity Attributable to Parent [Abstract]

Stockholders' equity and noncontrolling interest [Table Text Block]

Changes to equity during the three months ended March 31, 2012, are presented below:

	Tesoro Corporation Stockholders' Equity			Noncontrolling Interest			Total Equity
Balance at December 31, 2011	$	3,668		$	310		$	3,978
Net earnings	56			6			62
Shares issued for equity-based compensation awards	15			—			15
Excess tax benefits from stock-based compensation arrangements	3			—			3
Amortization of equity settled awards	7			—			7
Purchases of common stock	(10		)	—			(10		)
Distributions to noncontrolling interest	—			(6		)	(6		)
Balance at March 31, 2012	$	3,739		$	310		$	4,049

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Debt, Total Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Total Debt	$ 1,674	$ 1,701
Tesoro Corporation Revolving Credit Facility [Member]
Line of Credit Facility	0	0
Tesoro Panama Company S.A. Revolving Credit Facility [Member]
Line of Credit Facility	90	117
Tesoro Logistics LP Revolving Credit Facility [Member]
Line of Credit Facility	50	50
6 1/4% Senior Notes Due 2012 [Member]
Long-term debt	299	299
Debt instrument interest rate	6 1/4
Year of maturity	2012
6 5/8% Senior Notes Due 2015 [Member]
Long-term debt	450	450
Debt instrument interest rate	6 5/8
Year of maturity	2015
6 1/2% Senior Notes Due 2017 [Member]
Long-term debt	473	473
Debt instrument interest rate	6 1/2
Year of maturity	2017
9 3/4% Senior Notes Due 2019 (net of unamortized discount of $9 million) Member]
Long-term debt	291	291
Debt instrument, unamortized discount	9	9
Debt instrument interest rate	9 3/4
Year of maturity	2019
Capital lease obligations and other [Member]
Capital lease obligations and other	$ 21	$ 21

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Subsequent Events

3 Months Ended

Mar. 31, 2012

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS

Contribution of Martinez Crude Oil Marine Terminal

Effective April 1, 2012, we entered into a transaction (the “Contribution”) through TLGP to contribute the Martinez Crude Oil Marine Terminal and associated assets (the “Terminal”) in Martinez, California to TLLP. The Contribution was made in exchange for consideration from TLLP of $75 million, comprised of $67.5 million in cash financed with borrowings under the TLLP Revolving Credit Facility and the issuance of equity with a combined fair value of $7.5 million. The equity issued is comprised of 206,362 common units, representing an approximate 1% limited partner interest in TLLP, and 4,212 general partner units. The assets included in the Contribution include a single-berth dock, which has an estimated throughput capacity of approximately 145 thousand barrels per day (“Mbpd”), five associated crude oil storage tanks with a combined capacity of 425,000 barrels, two firewater tanks with 48,000 barrels of shell capacity and related pipelines that receive crude oil from third-party vessels for delivery to our Martinez refinery and a third-party terminal.

In connection with the Contribution, we entered into a 10-year use and throughput agreement under which the pipelines and tanks at the Terminal will be dedicated and used exclusively for the throughput and storage of our crude oil and refined products. Under the agreement, we are obligated to transport an average of at least 65 Mbpd of crude oil per month at a throughput and tankage fee of $0.55 per barrel. The fees under the agreement are indexed for inflation and the agreement gives us the option to renew for two five-year terms.

We also amended and restated the omnibus agreement (“Amended Omnibus Agreement”) in connection with the Contribution of the Terminal. Additional contributions from the Company and its affiliates to TLLP, including the assets in the Contribution, are governed by the Amended Omnibus Agreement. The fee payable to us for the provision of various general and administrative services under the Amended Omnibus Agreement did not change.

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Tesoro Logistics LP (Tables)

3 Months Ended

Mar. 31, 2012

Initial Public Offering Subsidiary [Abstract]

Subsidiary Balance Sheet [Table Text Block]

With the exception of affiliate balances, which are eliminated in consolidation, and their impact on equity, the TLLP condensed consolidated balance sheets as of March 31, 2012 and December 31, 2011, as presented below, are included in the condensed consolidated balance sheets of Tesoro Corporation.

	March 31, 2012		December 31, 2011
	(In millions)
ASSETS
Cash and cash equivalents	$	21	$	18
Receivables, less allowance for doubtful accounts
Trade	1		1
Affiliate	8		11
Other Current Assets	—		1
Net Property, Plant and Equipment	137		136
Other Noncurrent Assets	2		3
Total Assets	$	169	$	170
LIABILITIES AND EQUITY
Accounts payable
Trade	$	4	$	6
Affiliate	3		3
Deferred revenue - affiliate	2		1
Accrued liabilities	—		1
Debt	50		50
Equity	110		109
Total Liabilities and Equity	$	169	$	170

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Derivative Instruments, Open Positions (Details) (CAD) In Millions, unless otherwise specified	Mar. 31, 2012
Derivative [Line Items]
Open positions maturity dates	2
Maturity of foreign currency derivatives	April 25, 2012
Forward contract to purchase Canadian dollars	44
Derivatives Designated for Hedge Accounting [Member] | Forwards [Member] | 2012 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	0
Derivatives Designated for Hedge Accounting [Member] | Futures [Member] | 2012 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	0
Derivatives Designated for Hedge Accounting [Member] | Futures [Member] | 2013 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	0
Derivatives Designated for Hedge Accounting [Member] | Swaps [Member] | 2012 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	0
Derivatives Designated for Hedge Accounting [Member] | Swaps [Member] | 2013 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	0
Mark-to-Market Derivatives [Member] | Futures [Member] | 2012 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	(3,734,000)
Mark-to-Market Derivatives [Member] | Futures [Member] | 2013 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	(50,000)
Mark-to-Market Derivatives [Member] | Swaps [Member] | 2012 [Member]
Derivative [Line Items]
Long (Short) Contract Volumes (in thousands of barrels)	1,021,000

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Tesoro Logistics LP, Credit Facility (Details) (Tesoro Logistics LP Revolving Credit Facility [Member])	Mar. 31, 2012
Tesoro Logistics LP Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amended date	3/30/2012

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Condensed Statements of Consolidated Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net earnings	$ 62	$ 107
Adjustments to reconcile net earnings to net cash from (used in) operating activities: [Abstract]
Depreciation and amortization expense	103	103
Amortization of debt issuance costs and discounts	3	6
Loss on asset disposals and impairments	6	3
Stock-based compensation expense	21	48
Deferred income taxes	24	60
Excess tax benefits from stock-based compensation arrangements	(3)	(4)
Other changes in non-current assets and liabilities	(133)	(9)
Changes in current assets and current liabilities:
Receivables	(92)	(323)
Inventories	51	(210)
Prepayments and other	(10)	(54)
Accounts payable and accrued liabilities	(47)	484
Net cash from (used in) operating activities	(15)	211
CASH FLOWS USED IN INVESTING ACTIVITIES
Capital expenditures	(111)	(48)
Acquisitions	(37)	0
Net cash used in investing activities	(148)	(48)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	85	60
Repayments on revolving credit agreements	(112)	(130)
Proceeds from stock options exercised	14	4
Distributions to noncontrolling interest	(6)	0
Purchases of common stock	(10)	(3)
Excess tax benefits from stock-based compensation arrangements	3	4
Financing costs and other	(1)	(22)
Net cash used in financing activities	(27)	(87)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(190)	76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	900	648
CASH AND CASH EQUIVALENTS, END OF PERIOD	710	724
SUPPLEMENTAL CASH FLOW DISCLOSURES
Interest paid, net of capitalized interest	(2)	(2)
Income taxes paid, net	0	1
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING ACTIVITIES
Capital expenditures included in accounts payable and accrued liabilities at end of period	$ 36	$ 17

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Fair Value Measurements (Notes)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

FAIR VALUE MEASUREMENTS [Text Block]

FAIR VALUE MEASUREMENTS

We classify financial assets and financial liabilities into the following fair value hierarchy:

• level 1 - quoted prices in active markets for identical assets and liabilities;

• level 2 - quoted prices for similar assets and liabilities in active markets, and inputs other than quoted prices that are observable for the asset or liability; and

• level 3 - unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

We measure fair value using level 1 inputs, when available, because they provide the most reliable evidence of fair value. Derivative instruments and our Renewable Identification Numbers (“RINs”) are our only financial assets and financial liabilities measured at fair value on a recurring basis. See Note F for further information on the Company's derivative instruments.

Our derivative instruments consist primarily of exchange-traded futures (“Futures Contracts”), over-the-counter swaps (“OTC Swap Contracts”), and physical commodity forward purchase and sale contracts (“Forward Contracts”). Futures Contracts are valued based on quoted prices from exchanges and are categorized in level 1 or level 2 of the fair value hierarchy based on the liquidity of the instrument. OTC Swap Contracts and Forward Contracts are valued using third-party broker quotes, industry pricing services and price curves derived from commodity exchange postings, with consideration of counterparty credit risk. These quotes are corroborated with market data and are categorized in level 2 of the fair value hierarchy. We did not have any derivative assets or liabilities classified as level 3 at March 31, 2012 or December 31, 2011.

Our RINs obligation represents a liability for the purchase of RINs to satisfy our obligation to blend biofuels into the products we produce.  A RIN is assigned to each gallon of biofuel produced or imported into the U.S. as required by the U.S. Environmental Protection Agency's (“EPA's”) Renewable Fuel Standard, which was implemented in accordance with the Energy Policy Act of 2005 and expanded by the Energy Independence and Security Act of 2007.  The EPA sets annual quotas for the percentage of biofuels that must be blended into transportation fuels consumed in the U.S., and as a producer of transportation fuels from petroleum, we are obligated to blend biofuels into the products we produce at a rate that is at least equal to the EPA's quota.  To the degree we are unable to blend at that rate, we must purchase RINs in the open market to satisfy our obligation.  Our RINs obligation is based on our RINs deficiency and the price of those RINs as of the balance sheet date.  Our RINs obligation is categorized in Level 2 of the fair value hierarchy and is measured at fair value using the market approach based on quoted prices from an independent pricing service.

Financial instruments recognized at their fair values in our consolidated balance sheets by level within the fair value hierarchy were as follows (in millions):

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of March 31, 2012
Assets:
Commodity Futures Contracts	$	174	$	7	$	—	$	(153	)	$	28
Commodity OTC Swap Contracts	—		1		—		(1		)	—
Total Assets	$	174	$	8	$	—	$	(154	)	$	28
Liabilities:
Commodity Futures Contracts	$	168	$	3	$	—	$	(171	)	$	—
Commodity OTC Swap Contracts	—		3		—		(1		)	2
RINs Obligation	—		7		—		—			7
Total Liabilities	$	168	$	13	$	—	$	(172	)	$	9

	Level 1		Level 2		Level 3		Netting and Collateral (a)			Total as of December 31, 2011
Assets:
Commodity Futures Contracts	$	86	$	9	$	—	$	(61	)	$	34
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		4		—		—			4
Total Assets	$	86	$	16	$	—	$	(63	)	$	39
Liabilities:
Commodity Futures Contracts	$	130	$	6	$	—	$	(136	)	$	—
Commodity OTC Swap Contracts	—		3		—		(2		)	1
Commodity Forward Contracts	—		1		—		—			1
RINs Obligation	—		3		—		—			3
Total Liabilities	$	130	$	13	$	—	$	(138	)	$	5

________________

(a) Represents the impact of netting assets, liabilities and cash collateral when a legal right of offset exists. As of March 31, 2012 and December 31, 2011, cash collateral amounts of $18 million and $75 million, respectively are being netted with mark-to-market derivative assets.

Certain of our derivative contracts, under master netting arrangements, include both asset and liability positions. We have elected to offset both the fair value amounts and any related cash collateral amounts recognized for multiple derivative instruments executed with the same counterparty when there is a legally enforceable right and an intention to settle net or simultaneously.

The physical inventory associated with the futures contracts included in the above table and selected for fair value hedge accounting treatment is adjusted to fair value at the end of the period. At December 31, 2011, the fair value adjustment related to the physical inventory was approximately $4 million. There were no fair value adjustments to the physical inventory at March 31, 2012.

We believe the carrying value of our financial instruments, including cash and cash equivalents, receivables, accounts payable and certain accrued liabilities approximate fair value. Our fair value assessment incorporates a variety of considerations, including:

• the short term duration of the instruments (less than one percent of our trade receivables and payables are outstanding for greater than 90 days); and

• the expected future insignificance of bad debt expense, which includes an evaluation of counterparty credit risk.

The fair value of our debt is based on prices from recent trade activity and is categorized in Level 2 of the fair value hierarchy. Both the carrying value and fair value of our debt at March 31, 2012, were approximately $1.7 billion. The carrying value and fair value of our debt at December 31, 2011, were approximately $1.7 billion and $1.8 billion, respectively.

There were no material nonfinancial assets or liabilities that were measured at fair value during the three months ended March 31, 2012.

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Commitments and Contingencies, Other Matters (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2009	Dec. 31, 2008	Mar. 31, 2012
MTBE Contaimination Litigation [Member]
Other Matters [Line Items]
Loss contingency, pending claims, number			3
TAPS Litigation [Member]
Other Matters [Line Items]
Loss contingency, lawsuit filing date	December 31, 2009
Gain (loss) related to litigation settlement		$ 50
Loss contingency, estimate of possible loss			$ 16

XML

Condensed Consolidating Financial Information, Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash from (used in) operating activities	$ (15)	$ 211
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	(111)	(48)
Acquisitions	(37)	0
Intercompany notes, net	0	0
Net cash from (used in) investing activities	(148)	(48)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under revolving credit agreements	85	60
Repayments on revolving credit agreements	(112)	(130)
Proceeds from stock options exercised	14	4
Excess tax benefits from equity-based compensation arrangements	3	4
Distributions to noncontrolling interest	(6)	0
Purchases of common stock	(10)	(3)
Net intercompany borrowings (repayments)	0	0
Distributions to Subordinated unitholders	0
Financing costs and other	(1)	(22)
Net cash from (used in) financing activities	(27)	(87)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(190)	76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	900	648
CASH AND CASH EQUIVALENTS, END OF PERIOD	710	724
Tesoro Corporation [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash from (used in) operating activities	13	5
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	0	0
Acquisitions	0
Intercompany notes, net	(20)	16
Net cash from (used in) investing activities	(20)	16
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under revolving credit agreements	0	0
Repayments on revolving credit agreements	0	0
Proceeds from stock options exercised	14	4
Excess tax benefits from equity-based compensation arrangements	0	0
Purchases of common stock	(10)	(3)
Net intercompany borrowings (repayments)	0	0
Distributions to Subordinated unitholders	3
Financing costs and other	0	(22)
Net cash from (used in) financing activities	7	(21)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	0	0
Guarantor Subsidiaries [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash from (used in) operating activities	(12)	422
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	(107)	(48)
Acquisitions	(37)
Intercompany notes, net	0	0
Net cash from (used in) investing activities	(144)	(48)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under revolving credit agreements	0	0
Repayments on revolving credit agreements	0	0
Proceeds from stock options exercised	0	0
Excess tax benefits from equity-based compensation arrangements	3	4
Purchases of common stock	0	0
Net intercompany borrowings (repayments)	6	(291)
Distributions to Subordinated unitholders	3
Financing costs and other	0	0
Net cash from (used in) financing activities	12	(287)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(144)	87
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	805	612
CASH AND CASH EQUIVALENTS, END OF PERIOD	661	699
Non-Guarantors [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash from (used in) operating activities	(16)	(216)
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	(4)	0
Acquisitions	0
Intercompany notes, net	0	0
Net cash from (used in) investing activities	(4)	0
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under revolving credit agreements	85	60
Repayments on revolving credit agreements	(112)	(130)
Proceeds from stock options exercised	0	0
Excess tax benefits from equity-based compensation arrangements	0	0
Purchases of common stock	0	0
Net intercompany borrowings (repayments)	14	275
Distributions to Subordinated unitholders	(6)
Financing costs and other	(1)	0
Net cash from (used in) financing activities	(26)	205
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(46)	(11)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	95	36
CASH AND CASH EQUIVALENTS, END OF PERIOD	49	25
Eliminations [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net cash from (used in) operating activities	0	0
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures	0	0
Acquisitions	0
Intercompany notes, net	20	(16)
Net cash from (used in) investing activities	20	(16)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Borrowings under revolving credit agreements	0	0
Repayments on revolving credit agreements	0	0
Proceeds from stock options exercised	0	0
Excess tax benefits from equity-based compensation arrangements	0	0
Purchases of common stock	0	0
Net intercompany borrowings (repayments)	(20)	16
Distributions to Subordinated unitholders	0
Financing costs and other	0	0
Net cash from (used in) financing activities	(20)	16
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 0	$ 0

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Loss Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Share and per share calculations are presented below (in millions except per share amounts):

	Three Months Ended
	March 31,
	2012		2011
Basic:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Basic Earnings Per Share	$	0.40	$	0.76
Diluted:
Net earnings attributable to Tesoro Corporation stockholders	$	56	$	107
Weighted average common shares outstanding	139.5		141.6
Common stock equivalents	2.3		2.4
Total diluted shares	141.8		144.0
Diluted Earnings Per Share	$	0.39	$	0.74

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Potentially dilutive common stock equivalents were excluded from the calculation of diluted earnings per share, as the effect of including such securities would have been anti-dilutive, were as follows (in millions):

	Three Months Ended
	March 31,
	2012	2011
Stock options (a)	3.0	3.2

________________

(a) Common stock options presented above were excluded as the exercise prices were greater than the average market price of the common stock during each respective reporting period.

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Basis of Presentation Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2012
Variable Interest Entity [Line Items]
Variable interest entity, measure of activity, revenues	97.00%

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Condensed Consolidating Financial Information (Notes)

3 Months Ended

Mar. 31, 2012

Condensed Consolidating Financial Information [Abstract]

CONDENSED CONSOLIDATING FINANCIAL INFORMATION

CONDENSED CONSOLIDATING FINANCIAL INFORMATION

Separate condensed consolidating financial information of Tesoro Corporation (the “Parent”), subsidiary guarantors and non-guarantors are presented below. Tesoro and certain subsidiary guarantors have fully and unconditionally guaranteed our 6 1/4% senior notes due 2012, 6 5/8% senior notes due 2015, 6 1/2% senior notes due 2017, and 9 3/4% senior notes due 2019. TLLP, in which we have a 52% ownership interest, and other subsidiaries have not guaranteed these obligations. As a result of these guarantee arrangements, we are required to present the following condensed consolidating financial information. The following condensed consolidating financial information should be read in conjunction with the accompanying condensed consolidated financial statements and notes. The following condensed consolidating financial information is provided as an alternative to providing separate financial statements for guarantor subsidiaries. Separate financial statements of Tesoro's subsidiary guarantors are not included because the guarantees are full and unconditional and these subsidiary guarantors are 100% owned and jointly and severally liable for Tesoro's outstanding senior notes. The information is presented using the equity method of accounting for investments in subsidiaries.

Condensed Consolidating Balance Sheet as of March 31, 2012

(In millions)

	Parent		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	661		$	49	$	—		$	710
Receivables, less allowance for doubtful accounts	1		1,315			48		—			1,364
Inventories	—		1,427			288		—			1,715
Prepayments and other	118		86			21		—			225
Total Current Assets	119		3,489			406		—			4,014
Net Property, Plant and Equipment	—		4,991			221		—			5,212
Investment in Subsidiaries	4,492		(299		)	313		(4,506		)	—
Long-Term Receivables from Affiliates	2,000		—			—		(2,000		)	—
Other Noncurrent Assets	40		640			52		(50		)	682
Total Assets	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	115	$	2,468		$	201	$	—		$	2,784
Current maturities of debt	299		2			90		—			391
Total Current Liabilities	414		2,470			291		—			3,175
Long-Term Payables to Affiliates	—		1,961			39		(2,000		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,221		177			3		—			1,401
Equity-Tesoro Corporation	3,752		4,194			299		(4,506		)	3,739
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,651	$	8,821		$	992	$	(6,556	)	$	9,908

Condensed Consolidating Balance Sheet as of December 31, 2011

(In millions)

	Tesoro Corporation		Guarantor Subsidiaries			Non-Guarantors		Eliminations			Consolidated
ASSETS
Current Assets:
Cash and cash equivalents	$	—	$	805		$	95	$	—		$	900
Receivables, less allowance for doubtful accounts	1		1,189			82		—			1,272
Inventories	—		1,416			347		—			1,763
Prepayments and other	106		88			22		—			216
Total Current Assets	107		3,498			546		—			4,151
Net Property, Plant and Equipment	—		4,925			223		—			5,148
Investment in Subsidiaries	4,436		(284		)	282		(4,434		)	—
Long-Term Receivables from Affiliates	1,944		—			—		(1,944		)	—
Other Noncurrent Assets	42		548			53		(50		)	593
Total Assets	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892
LIABILITIES AND EQUITY
Current Liabilities:
Accounts payable and accrued liabilities	$	85	$	2,420		$	326	$	—		$	2,831
Current maturities of debt	299		2			117		—			418
Total Current Liabilities	384		2,422			443		—			3,249
Long-Term Payables to Affiliates	—		1,922			22		(1,944		)	—
Debt	1,264		19			50		(50		)	1,283
Other Noncurrent Liabilities	1,200		177			5		—			1,382
Equity-Tesoro Corporation	3,681		4,147			274		(4,434		)	3,668
Equity-Noncontrolling interest	—		—			310		—			310
Total Liabilities and Equity	$	6,529	$	8,687		$	1,104	$	(6,428	)	$	9,892

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	9,633		$	596		$	(2,409	)	$	7,820
Costs and expenses	2			9,506			587			(2,409		)	7,686
OPERATING INCOME (LOSS)	(2		)	127			9			—			134
Equity in earnings (loss) of subsidiaries	59			(13		)	31			(77		)	—
Other expense	(1		)	(32		)	(2		)	—			(35		)
EARNINGS (LOSS) BEFORE INCOME TAXES	56			82			38			(77		)	99
Income tax expense (a)	—			35			2			—			37
NET EARNINGS (LOSS)	56			47			36			(77		)	62
Less net income attributable to noncontrolling interest	—			—			6			—			6
NET EARNINGS (LOSS) ATTRIBUTABLE TO TESORO CORPORATION STOCKHOLDERS	$	56		$	47		$	30		$	(77	)	$	56
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	56		$	47		$	36		$	(77	)	$	62
Less noncontrolling interest in comprehensive income	—			—			6			—			6
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO TESORO CORPORATION	$	56		$	47		$	30		$	(77	)	$	56

_______________

(a) 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.

Condensed Consolidating Statement of Operations and

Comprehensive Income for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non- Guarantors			Eliminations			Consolidated
REVENUES	$	—		$	8,241		$	688		$	(2,403	)	$	6,526
Costs and expenses	4			8,023			683			(2,403		)	6,307
OPERATING INCOME (LOSS)	(4		)	218			5			—			219
Equity in earnings (loss) of subsidiaries	109			(12		)	—			(97		)	—
Other expense	—			(40		)	(2		)	—			(42		)
EARNINGS (LOSS) BEFORE INCOME TAXES	105			166			3			(97		)	177
Income tax expense (benefit) (a)	(2		)	71			1			—			70
NET EARNINGS (LOSS)	$	107		$	95		$	2		$	(97	)	$	107
COMPREHENSIVE INCOME (LOSS)
Total comprehensive income (loss)	$	107		$	95		$	2		$	(97	)	$	107
TOTAL COMPREHENSIVE INCOME (LOSS)	$	107		$	95		$	2		$	(97	)	$	107

_______________

(a) The income tax expense (benefit) reflected in each column does not include any tax effect of the equity in earnings from subsidiaries.

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2012

(In millions)

	Parent			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	13		$	(12	)	$	(16	)	$	—		$	(15	)
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(107		)	(4		)	—			(111		)
Acquisitions	—			(37		)	—			—			(37		)
Intercompany notes, net	(20		)	—			—			20			—
Net cash from (used in) investing activities	(20		)	(144		)	(4		)	20			(148		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			85			—			85
Repayments on revolving credit agreements	—			—			(112		)	—			(112		)
Proceeds from stock options exercised	14			—			—			—			14
Excess tax benefits from stock-based compensation arrangements	—			3			—			—			3
Distributions to noncontrolling interest	—			—			(6		)	—			(6		)
Purchases of common stock	(10		)	—			—			—			(10		)
Net intercompany borrowings (repayments)	—			6			14			(20		)	—
Distributions to Subordinated unitholders	3			3			(6		)	—			—
Financing costs and other	—			—			(1		)	—			(1		)
Net cash from (used in) financing activities	7			12			(26		)	(20		)	(27		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			(144		)	(46		)	—			(190		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			805			95			—			900
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	661		$	49		$	—		$	710

Condensed Consolidating Statement of Cash Flows for the Three Months EndedMarch 31, 2011

(In millions)

	Tesoro Corporation			Guarantor Subsidiaries			Non-Guarantors			Eliminations			Consolidated
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES
Net cash from (used in) operating activities	$	5		$	422		$	(216	)	$	—		$	211
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES
Capital expenditures	—			(48		)	—			—			(48		)
Intercompany notes, net	16			—			—			(16		)	—
Net cash from (used in) investing activities	16			(48		)	—			(16		)	(48		)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES
Borrowings under revolving credit agreements	—			—			60			—			60
Repayments on revolving credit agreements	—			—			(130		)	—			(130		)
Proceeds from stock options exercised	4			—			—			—			4
Purchases of common stock	(3		)	—			—			—			(3		)
Excess tax benefits from stock-based compensation arrangements	—			4			—			—			4
Net intercompany borrowings (repayments)	—			(291		)	275			16			—
Financing costs and other	(22		)	—			—			—			(22		)
Net cash from (used in) financing activities	(21		)	(287		)	205			16			(87		)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	—			87			(11		)	—			76
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	—			612			36			—			648
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	—		$	699		$	25		$	—		$	724