10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the Quarterly Period Ended March 31, 2013

Or

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

For the transition period from                      to                     .

(Exact name of registrant as specified in its charter)

Delaware	1-16811	25-1897152
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

600 Grant Street, Pittsburgh, PA	15219-2800
(Address of principal executive offices)	(Zip Code)

(412) 433-1121

(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 Ö  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 [ Ö ] 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 the definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  Ö	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 Act).

Yes     No Ö 

Common stock outstanding at April 25, 2013 – 144,284,576 shares

INDEX

			Page
PART I – FINANCIAL INFORMATION
	Item 1.	Financial Statements:
		Consolidated Statement of Operations (Unaudited)		1
		Consolidated Statement of Comprehensive Income (Loss) (Unaudited)		2
		Consolidated Balance Sheet (Unaudited)		3
		Consolidated Statement of Cash Flows (Unaudited)		4
		Notes to Consolidated Financial Statements (Unaudited)		5
	Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		28
	Item 3.	Quantitative and Qualitative Disclosures about Market Risk		44
	Item 4.	Controls and Procedures		45
		Supplemental Statistics (Unaudited)		46
PART II – OTHER INFORMATION
	Item 1.	Legal Proceedings		47
	Item 4.	Mine Safety Disclosure		55
	Item 5.	Other Information		55
	Item 6.	Exhibits		56
SIGNATURE				57
WEB SITE POSTING				57

UNITED STATES STEEL CORPORATION

CONSOLIDATED STATEMENT OF OPERATIONS

(Unaudited)

	Three Months Ended March 31,
(Dollars in millions, except per share amounts)	2013			2012
Net sales:
Net sales	$	4,317		$	4,833
Net sales to related parties (Note 19)		278			339
Total		4,595			5,172
Operating expenses (income):
Cost of sales (excludes items shown below)		4,242			4,626
Selling, general and administrative expenses		145			173
Depreciation, depletion and amortization		171			163
Income from investees		(8	)		(24	)
Net loss on disposal of assets (Note 4)		1			309
Other expense (income), net		6			(2	)
Total		4,557			5,245
Income (loss) from operations		38			(73	)
Interest expense		85			49
Interest income		(1	)		(4	)
Other financial costs		20			5
Net interest and other financial costs (Note 7)		104			50
Loss before income taxes		(66	)		(123	)
Income tax provision (Note 8)		7			96
Net loss		(73	)		(219	)
Less: Net income attributable to noncontrolling interests		-			-
Net loss attributable to United States Steel Corporation	$	(73	)	$	(219	)
Loss per common share (Note 10):
Net loss per share attributable to United States Steel Corporation shareholders:
- Basic	$	(0.51	)	$	(1.52	)
- Diluted	$	(0.51	)	$	(1.52	)

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

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UNITED STATES STEEL CORPORATION

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS)

(Unaudited)

	Three Months Ended, March 31,
(Dollars in millions)	2013			2012
Net loss	$	(73	)	$	(219	)
Other comprehensive income (loss), net of tax:
Changes in foreign currency translation adjustments		(37	)		107
Changes in pension and other employee benefit accounts		69			70
Total other comprehensive income, net of tax		32			177
Comprehensive loss including noncontrolling interest		(41	)		(42	)
Comprehensive loss attributable to noncontrolling interest		-			-
Comprehensive loss attributable to United States Steel Corporation	$	(41	)	$	(42	)

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

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UNITED STATES STEEL CORPORATION

CONSOLIDATED BALANCE SHEET

(Dollars in millions)	(Unaudited) March 31, 2013			December 31, 2012
Assets
Current assets:
Cash and cash equivalents	$	733		$	570
Receivables, less allowance of $54 and $55		2,119			1,872
Receivables from related parties (Note 19)		155			218
Inventories (Note 11)		2,316			2,503
Deferred income tax benefits (Note 8)		169			171
Other current assets		62			40
Total current assets		5,554			5,374
Property, plant and equipment		16,845			16,906
Less accumulated depreciation and depletion		10,599			10,498
Total property, plant and equipment, net		6,246			6,408
Investments and long-term receivables, less allowance of $3 in both periods		624			609
Intangibles – net (Note 5)		249			253
Goodwill (Note 5)		1,808			1,822
Deferred income tax benefits (Note 8)		366			424
Other noncurrent assets		304			327
Total assets	$	15,151		$	15,217
Liabilities
Current liabilities:
Accounts payable and other accrued liabilities	$	1,788		$	1,722
Accounts payable to related parties (Note 19)		91			78
Bank checks outstanding		48			15
Payroll and benefits payable		947			977
Accrued taxes		147			146
Accrued interest		64			50
Short-term debt and current maturities of long-term debt (Note 13)		2			2
Total current liabilities		3,087			2,990
Long-term debt, less unamortized discount (Note 13)		3,932			3,936
Employee benefits		4,263			4,416
Deferred credits and other noncurrent liabilities		398			397
Total liabilities		11,680			11,739
Contingencies and commitments (Note 20)
Stockholders’ Equity (Note 17):
Common stock (150,925,911 shares issued) (Note 10)		151			151
Treasury stock, at cost (6,641,532 and 6,643,553 shares)		(520	)		(521	)
Additional paid-in capital		3,693			3,652
Retained earnings		3,382			3,463
Accumulated other comprehensive loss (Note 18)		(3,236	)		(3,268	)
Total United States Steel Corporation stockholders’ equity		3,470			3,477
Noncontrolling interests		1			1
Total liabilities and stockholders’ equity	$	15,151		$	15,217

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

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UNITED STATES STEEL CORPORATION

CONSOLIDATED STATEMENT OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
(Dollars in millions)	2013			2012
Increase (decrease) in cash and cash equivalents
Operating activities:
Net loss	$	(73	)	$	(219	)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, depletion and amortization		171			163
Provision for doubtful accounts		(1	)		(3	)
Pensions and other postretirement benefits		(11	)		(131	)
Deferred income taxes		4			44
Net loss on disposal of assets (Note 4)		1			309
Currency remeasurement loss (gain)		19			(13	)
Distributions received, net of equity investees income		(5	)		7
Changes in:
Current receivables		(203	)		(175	)
Inventories		166			264
Current accounts payable and accrued expenses		135			87
Income taxes receivable/payable		(16	)		54
Bank checks outstanding		33			33
All other, net		13			6
Net cash provided by operating activities		233			426
Investing activities:
Capital expenditures		(116	)		(189	)
Disposal of assets		-			131
Change in restricted cash, net		27			4
Investments, net		(3	)		(2	)
Net cash used in investing activities		(92	)		(56	)
Financing activities:
Revolving credit facilities – borrowings		-			522
– repayments		-			(652	)
Receivables Purchase Agreement payments		-			(380	)
Issuance of long-term debt, net of financing costs		578			392
Repayment of long-term debt		(542	)		(4	)
Dividends paid		(7	)		(7	)
Net cash provided by (used in) financing activities		29			(129	)
Effect of exchange rate changes on cash		(7	)		3
Net increase in cash and cash equivalents		163			244
Cash and cash equivalents at beginning of year		570			408
Cash and cash equivalents at end of period	$	733		$	652

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

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Notes to Consolidated Financial Statements (Unaudited)

1. Basis of Presentation

United States Steel Corporation (U. S. Steel) produces and sells steel mill products, including flat-rolled and tubular products, in North America and Central Europe. Operations in North America also include transportation services (railroad and barge operations) and real estate operations.

The year-end consolidated balance sheet data was derived from audited statements but does not include all disclosures required for complete financial statements by accounting principles generally accepted in the United States of America (U.S. GAAP). The other information in these financial statements is unaudited but, in the opinion of management, reflects all adjustments necessary for a fair presentation of the results for the periods covered. All such adjustments are of a normal recurring nature unless disclosed otherwise. These financial statements, including notes, have been prepared in accordance with the applicable rules of the Securities and Exchange Commission and do not include all of the information and disclosures required by accounting principles generally accepted in the United States of America for complete financial statements. Additional information is contained in the United States Steel Corporation Annual Report on Form 10-K for the year ended December 31, 2012 which should be read in conjunction with these financial statements.

Reclassifications

Certain reclassifications of prior years’ data have been made to conform to the current year presentation.

2. New Accounting Standards

On February 5, 2013, the FASB issued Accounting Standards Update No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02). ASU 2013-02 requires companies to present information about reclassification adjustments from accumulated other comprehensive income, including the amount of the reclassification and the income statement line items affected by the reclassification. The information must be presented in the financial statements in a single note or on the face of the financial statements. ASU 2013-02 is effective for interim and annual periods beginning after December 15, 2012. U. S. Steel adopted ASU 2013-02 effective January 1, 2013 and has provided the required disclosures in Note 18.

3. Segment Information

U. S. Steel has three reportable segments: Flat-rolled Products (Flat-rolled), U. S. Steel Europe (USSE), and Tubular Products (Tubular). The results of several other operating segments that do not constitute reportable segments are combined and disclosed in the Other Businesses category. Prior to January 31, 2012, our USSE reportable segment consisted of U. S. Steel Košice (USSK) and U. S. Steel Serbia (USSS). On January 31, 2012, U. S. Steel sold USSS (see Note 4). The USSE segment information subsequent to January 31, 2012 reflects the results of USSK only.

The chief operating decision maker evaluates performance and determines resource allocations based on a number of factors, the primary measure being income (loss) from operations. Income (loss) from operations for reportable segments and Other Businesses does not include net interest and other financial costs (income), income taxes, postretirement benefit expenses (other than service cost and amortization of prior service cost for active employees) and certain other items that management believes are not indicative of future results. Information on segment assets is not disclosed, as it is not reviewed by the chief operating decision maker.

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The accounting principles applied at the operating segment level in determining income (loss) from operations are generally the same as those applied at the consolidated financial statement level. The transfer value for steel rounds from Flat-rolled to Tubular is based on cost. All other intersegment sales and transfers are accounted for at market-based prices and are eliminated at the corporate consolidation level. Corporate-level selling, general and administrative expenses and costs related to certain former businesses are allocated to the reportable segments and Other Businesses based on measures of activity that management believes are reasonable.

The results of segment operations for the three months ended March 31, 2013 and 2012 are:

(In millions) First Quarter 2013	Customer Sales		Intersegment Sales			Net Sales			Income (loss) from investees			Income (loss) from operations
Flat-rolled	$	3,103	$	335		$	3,438		$	10		$	(13	)
USSE		783		1			784			-			38
Tubular		686		1			687			(1	)		64
Total reportable segments		4,572		337			4,909			9			89
Other Businesses		23		34			57			(1	)		5
Reconciling Items and Eliminations		-		(371	)		(371	)		-			(56	)
Total	$	4,595	$	-		$	4,595		$	8		$	38
First Quarter 2012
Flat-rolled	$	3,300	$	463		$	3,763		$	28		$	183
USSE		815		49			864			-			(34	)
Tubular		946		1			947			(3	)		129
Total reportable segments		5,061		513			5,574			25			278
Other Businesses		111		56			167			(1	)		17
Reconciling Items and Eliminations		-		(569	)		(569	)		-			(368	)
Total	$	5,172	$	-		$	5,172		$	24		$	(73	)

The following is a schedule of reconciling items to income (loss) from operations:

	Three Months Ended March 31,
(In millions)	2013			2012
Items not allocated to segments:
Postretirement benefit expense (a)	$	(56	)	$	(77	)
Other items not allocated to segments:
Net loss on the sale of assets (Note 4)	$	-		$	(310	)
Property tax settlements		-			19
Total other items not allocated to segments		-			(291	)
Total reconciling items	$	(56	)	$	(368	)

^(a)  Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active employees, associated with our pension, retiree health care and life insurance benefit plans.

- 6 -

4. Dispositions

The net loss on disposal of assets for the first three months of 2012 primarily relates to the following dispositions:

U. S. Steel Serbia

On January 31, 2012, U. S. Steel sold USSS to the Republic of Serbia for a purchase price of one dollar. In addition, USSK received a $40 million payment for certain intercompany balances owed by USSS for raw materials and support services. As a result of this transaction, U. S. Steel recorded a total non-cash pretax charge of $399 million.

Birmingham Southern Railroad Company

On February 1, 2012, U. S. Steel completed the sale of the majority of the operating assets of Birmingham Southern Railroad Company and the Port Birmingham Terminal. As a result of the transaction, U. S. Steel recorded a pretax gain of $89 million.

5. Goodwill and Intangible Assets

The changes in the carrying amount of goodwill by segment for the three months ended March 31, 2013 are as follows:

	Flat-rolled Segment			USSE Segment		Tubular Segment		Total
Balance at December 31, 2012	$	984		$	4	$	834	$	1,822
Currency translation		(14	)		-		-		(14	)
Balance at March 31, 2013	$	970		$	4	$	834	$	1,808

Goodwill represents the excess of the cost over the fair value of acquired identifiable tangible and intangible assets and liabilities assumed from businesses acquired. We have two reporting units that include nearly all of our goodwill: our Flat-rolled reporting unit and our Texas Operations reporting unit, which is part of our Tubular operating segment.

Goodwill is tested for impairment at the reporting unit level annually in the third quarter and whenever events or circumstances indicate that the carrying value may not be recoverable. U. S. Steel completed its annual goodwill impairment evaluation during the third quarter of 2012 and determined, on the basis of a number of economic, cost, market and other qualitative factors, that there was no indication of goodwill impairment for any of the reporting units. Goodwill impairment tests in prior years also indicated that goodwill was not impaired for any reporting unit.

Amortizable intangible assets are being amortized on a straight-line basis over their estimated useful lives and are detailed below:

			As of March 31, 2013						As of December 31, 2012
(In millions)	Useful Lives		Gross Carrying Amount		Accumulated Amortization		Net Amount		Gross Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships		22-23 Years	$	219	$	56	$	163	$	221	$	54	$	167
Other		2-20 Years		23		12		11		22		11		11
Total amortizable intangible assets			$	242	$	68	$	174	$	243	$	65	$	178

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The carrying amount of acquired water rights with indefinite lives as of March 31, 2013 and December 31, 2012 totaled $75 million. The water rights are tested for impairment annually in the third quarter. U. S. Steel completed its annual evaluation during the third quarter of 2012 by performing a qualitative assessment which indicated that the water rights were not impaired. Prior year impairment tests also indicated that the water rights were not impaired.

Amortization expense was $3 million in both the three months ended March 31, 2013 and 2012. The estimated future amortization expense of identifiable intangible assets during the next five years is $8 million for the remaining portion of 2013 and $11 million each year from 2014 to 2017.

6. Pensions and Other Benefits

The following table reflects the components of net periodic benefit cost for the three months ended March 31, 2013 and 2012:

	Pension Benefits						Other Benefits
(In millions)	2013			2012			2013			2012
Service cost	$	32		$	29		$	7		$	7
Interest cost		101			116			35			45
Expected return on plan assets		(154	)		(153	)		(33	)		(28	)
Amortization of prior service cost		6			5			(3	)		6
Amortization of actuarial net loss		92			88			8			-
Net periodic benefit cost, excluding below		77			85			14			30
Multiemployer plans		18			17			-			-
Settlement, termination and curtailment gains		-			(2	)		-			-
Net periodic benefit cost	$	95		$	100		$	14		$	30

Employer Contributions

During the first three months of 2013, U. S. Steel made $23 million in required cash contributions to the USSC pension plans, cash payments of $18 million to the Steelworkers’ Pension Trust and $3 million of pension payments not funded by trusts.

During the first three months of 2013, cash payments of $67 million were made for other postretirement benefit payments not funded by trusts. In addition, U. S. Steel made a required contribution of $10 million in the first quarter of 2013 to our trust for represented retiree health care and life insurance benefits.

Company contributions to defined contribution plans totaled $11 million and $10 million for the three months ended March 31, 2013 and 2012, respectively.

7. Net Interest and Other Financial Costs

Net interest and other financial costs includes interest expense, interest income, financing costs, derivatives gains and losses and foreign currency remeasurement gains and losses. Foreign currency gains and losses are a result of foreign currency denominated assets and liabilities that require remeasurement. During the three months ended March 31, 2013 and 2012, net foreign currency remeasurement losses of $9 million and gains of $2 million, respectively, were recorded in other financial costs. For the three months ended March 31, 2013, net interest and other financial costs also includes a charge of $34 million related to repurchases of approximately $542 million aggregate principal amount of our 4.00% Senior Convertible Notes due May 15, 2014. See Note 13 for further details.

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See Note 12 for additional information on U. S. Steel’s use of derivatives to mitigate its foreign currency exchange rate exposure.

8. Income Taxes

Tax provision

For the three months ended March 31, 2013 and 2012, we recorded a tax provision of $7 million on our pretax loss of $66 million and a tax provision of $96 million on our pretax loss of $123 million, respectively. The tax provision does not reflect any tax benefit for pretax losses in Canada and Serbia (USSS was sold on January 31, 2012), which are jurisdictions where we have, or had, recorded full valuation allowances on deferred tax assets, and also does not reflect any tax provision or benefit for certain foreign currency remeasurement gains and losses that are not recognized in any tax jurisdiction. In addition, no significant tax benefit was recorded on the $399 million loss on the sale of USSS.

The tax provision for the first three months of 2013 is based on an estimated annual effective rate, which requires management to make its best estimate of annual pretax income or loss. During the year, management regularly updates forecasted annual pretax results for the various countries in which we operate based on changes in factors such as prices, shipments, product mix, plant operating performance and cost estimates. To the extent that actual 2013 pretax results for U.S. and foreign income or loss vary from estimates applied herein, the actual tax provision or benefit recognized in 2013 could be materially different from the forecasted amount used to estimate the tax provision for the three months ended March 31, 2013.

Unrecognized tax benefits

Unrecognized tax benefits are the differences between a tax position taken, or expected to be taken, in a tax return and the benefit recognized for accounting purposes pursuant to the guidance found in ASC Topic 740 on income taxes. The total amount of gross unrecognized tax benefits was $84 million at March 31, 2013 and $85 million at December 31, 2012. The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $65 million as of both March 31, 2013 and December 31, 2012.

U. S. Steel records interest related to uncertain tax positions as a part of net interest and other financial costs in the Statement of Operations. Any penalties are recognized as part of selling, general and administrative expenses. As of both March 31, 2013 and December 31, 2012, U. S. Steel had accrued liabilities of $7 million for interest related to uncertain tax positions. U. S. Steel currently does not have a liability for tax penalties.

It is reasonably expected that during the next 12 months unrecognized tax benefits related to income tax issues will decrease by approximately $10 million.

Deferred taxes

As of March 31, 2013, the net domestic deferred tax asset was $477 million compared to $538 million at December 31, 2012. A substantial amount of U. S. Steel’s domestic deferred tax assets relates to employee benefits that will become deductible for tax purposes over an extended period of time as cash contributions are made to employee benefit plans and retiree benefits are paid in the future. We continue to believe it is more likely than not that the net domestic deferred tax asset will be realized.

As of March 31, 2013, the net foreign deferred tax asset was $58 million, net of established valuation allowances of $1,109 million. At December 31, 2012, the net foreign deferred tax asset was $57 million, net of established valuation allowances of $1,099 million. The net foreign deferred

- 9 -

tax asset will fluctuate as the value of the U.S. dollar changes with respect to the euro and the Canadian dollar. At December 31, 2012, a full valuation allowance was recorded for the net Canadian deferred tax asset primarily due to cumulative losses in Canada in recent years.

If evidence changes and it becomes more likely than not that the Company will realize the net Canadian deferred tax asset, the valuation allowance would be partially or fully reversed. Any reversal of this amount would result in a decrease to income tax expense. The Slovak income tax rate increased from 19% to 23% starting in 2013. This change had an insignificant impact on deferred taxes at the end of 2012.

9. Significant Equity Investments

Summarized unaudited income statement information for our significant equity investments for the three months ended March 31, 2013 and 2012 is reported below (in millions, amounts represent 100% of investee financial information):

	2013		2012
Net sales	$	291	$	181
Cost of sales		185		170
Operating income		104		10
Net income		104		10
Net income attributable to significant equity investments		104		10

U. S. Steel’s portion of the equity in net income of the significant equity investments above was $5 million for both the three months ended March 31, 2013 and 2012, which is included in the income from investees line on the Consolidated Statement of Operations.

10. Income and Dividends Per Common Share

Net Income (Loss) Per Share Attributable to United States Steel Corporation Shareholders

Basic net income (loss) per common share is based on the weighted average number of common shares outstanding during the period.

Diluted net income (loss) per common share assumes the exercise of stock options, the vesting of restricted stock units and performance awards and the conversion of convertible notes, provided in each case the effect is dilutive. The “if-converted” method is used to calculate the dilutive effect of the Senior Convertible Notes due in 2014 and the “treasury stock” method is used to calculate the dilutive effect of the Senior Convertible Notes due in 2019 (due to our current intent and policy, among other factors, to settle the principal amount of the 2019 Senior Convertible Notes in cash upon conversion).

- 10 -

The computations for basic and diluted income (loss) per common share from continuing operations are as follows:

	Three Months Ended March 31,
(Dollars in millions, except per share amounts)	2013			2012
Net loss attributable to United States Steel
Corporation shareholders	$	(73	)	$	(219	)
Plus income effect of assumed conversion-interest on convertible notes		-			-
Net loss after assumed conversion	$	(73	)	$	(219	)
Weighted-average shares outstanding (in thousands):
Basic		144,353			144,075
Effect of convertible notes		-			-
Effect of stock options, restricted stock units and performance awards		-			-
Adjusted weighted-average shares outstanding, diluted		144,353			144,075
Basic loss per common share	$	(0.51	)	$	(1.52	)
Diluted loss per common share	$	(0.51	)	$	(1.52	)

U. S. Steel had a consolidated net loss for the first quarter of 2013 and 2012. As a result of the net loss, outstanding stock options, unvested restricted stock units, unvested performance awards and convertible notes were antidilutive for both quarters and were not included in the computation of diluted weighted average shares. The following table summarizes the securities that were antidilutive:

	Three Months Ended March 31,
(in thousands)	2013			2012
Securities granted under the 2005 Stock Incentive Plan		5,537			3,864
Securities convertible under the Senior Convertible Notes		26,114	(a)		27,059
Total		31,651			30,923

^(a) On March 27, 2013, we repurchased approximately $542 million aggregate principal amount of our 4% Senior Convertible Notes due in 2014. If the repurchases had occurred on January 1, 2013, the antidilutive securities would be 10,058 for the three months ended March 31, 2013.

Dividends Paid Per Share

The dividend for the first quarter of 2013 and 2012 was five cents per common share.

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11. Inventories

Inventories are carried at the lower of cost or market. The first-in, first-out method is the predominant method of inventory costing in Europe and Canada. The last-in, first-out (LIFO) method is the predominant method of inventory costing in the United States. At March 31, 2013 and December 31, 2012, the LIFO method accounted for 61 percent and 56 percent of total inventory values, respectively.

(In millions)	March 31, 2013		December 31, 2012
Raw materials	$	691	$	945
Semi-finished products		932		883
Finished products		585		573
Supplies and sundry items		108		102
Total	$	2,316	$	2,503

Current acquisition costs were estimated to exceed the above inventory values by $1.0 billion at both March 31, 2013 and December 31, 2012. The effect of liquidations of LIFO inventories was insignificant in both the three months ended March 31, 2013 and 2012.

Inventory includes $97 million and $86 million of land held for residential or commercial development as of March 31, 2013 and December 31, 2012, respectively.

12. Derivative Instruments

U. S. Steel is exposed to foreign currency exchange rate risks as a result of our European and Canadian operations. USSE’s revenues are primarily in euros and costs are primarily in U.S. dollars and euros. USSC’s revenues and costs are denominated in both Canadian and U.S. dollars. In addition, foreign cash requirements have been, and in the future, may be funded by intercompany loans, creating intercompany monetary assets and liabilities in currencies other than the functional currency of the entities involved, which can affect income when remeasured at the end of each period.

U. S. Steel uses euro forward sales contracts with maturities no longer than 12 months to exchange euros for U.S. dollars to manage our currency requirements and exposure to foreign currency exchange rate fluctuations. Derivative instruments are required to be recognized at fair value in the balance sheet. U. S. Steel has not elected to designate these euro forward sales contracts as hedges. Therefore, changes in their fair value are recognized immediately in the results of operations. The gains and losses recognized on these euro forward sales contracts may also partially offset the accounting remeasurement gains and losses recognized on intercompany loans.

As of March 31, 2013, U. S. Steel held euro forward sales contracts with a total notional value of approximately $353 million. We mitigate the risk of concentration of counterparty credit risk by purchasing our forward sales contracts from several counterparties.

Additionally, we routinely enter into fixed-price forward physical purchase contracts to partially manage our exposure to price risk related to the purchases of natural gas and certain nonferrous metals used in the production process. During 2013 and 2012, the forward physical purchase contracts for natural gas and nonferrous metals qualified for the normal purchases and normal sales exemption described in ASC Topic 815 and were not subject to mark-to-market accounting.

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The following summarizes the location and amounts of the fair values and gains or losses related to derivatives included in U. S. Steel’s financial statements as of March 31, 2013 and December 31, 2012 and for the three months ended March 31, 2013 and 2012:

(In millions)	Balance Sheet Location	Fair Value March 31, 2013		Fair Value December 31, 2012
Foreign exchange forward contracts	Accounts receivable	$	4	$	-
Foreign exchange forward contracts	Accounts payable	$	3	$	12

	Statement of Operations Location	Amount of Gain (Loss)		Amount of Gain (Loss)
(In millions)		Three Months ended March 31, 2013		Three Months ended March 31, 2012
Foreign exchange forward contracts	Other financial costs		$11		($13	)

In accordance with the guidance found in ASC Topic 820 on fair value measurements and disclosures, the fair value of our euro forward sales contracts was determined using Level 2 inputs, which are defined as “significant other observable” inputs. The inputs used are from market sources that aggregate data based upon market transactions.

13. Debt

(In millions)	Interest Rates %	Maturity	March 31, 2013		December 31, 2012
2037 Senior Notes	6.65	2037	$	350	$	350
2022 Senior Notes	7.50	2022		400		400
2021 Senior Notes	6.875	2021		275		-
2020 Senior Notes	7.375	2020		600		600
2018 Senior Notes	7.00	2018		500		500
2017 Senior Notes	6.05	2017		450		450
2019 Senior Convertible Notes	2.75	2019		316		-
2014 Senior Convertible Notes	4.00	2014		321		863
Province Note (C$150 million)	1.00	2015		148		151
Environmental Revenue Bonds	5.38 - 6.88	2015 - 2042		549		549
Recovery Zone Facility Bonds	6.75	2040		70		70
Fairfield Caster Lease		2022		35		35
Other capital leases and all other obligations		2013 - 2014		1		1
Amended Credit Agreement	Variable	2016		-		-
USSK Revolver	Variable	2013		-		-
USSK credit facilities	Variable	2015		-		-
Total Debt				4,015		3,969
Less Province Note fair value adjustment				21		23
Less unamortized discount				60		8
Less short-term debt and long-term debt due within one year				2		2
Long-term debt			$	3,932	$	3,936

To the extent not otherwise discussed below, information concerning the Senior Notes, the 2014 Senior Convertible Notes and other listed obligations can be found in Note 14 of the audited financial statements in the 2012 Annual Report on Form 10-K.

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2021 Senior Notes

On March 26, 2013, U. S. Steel issued $275 million of 6.875% Senior Notes due April 1, 2021 (2021 Senior Notes). U. S. Steel received net proceeds from the offering of $270 million after fees of $5 million related to the underwriting discount and third party expenses. The net proceeds from the issuance of the 2021 Senior Notes, together with the net proceeds of the concurrent 2019 Senior Convertible Notes offering (see below), were used to repurchase a portion of our 4.00% Senior Convertible Notes due May 15, 2014 (the 2014 Senior Convertible Notes). U. S. Steel will pay interest on the notes semi-annually in arrears on April 1^st and October 1^st of each year, commencing on October 1, 2013.

U. S. Steel may redeem the 2021 Senior Notes, in whole or in part, at our option at any time and from time to time on or after April 1, 2017 at the redemption price for such notes set forth below as a percentage of the principal amount, plus accrued and unpaid interest to, but excluding, the redemption date, if redeemed during the twelve-month period beginning April 1 of the years indicated below:

Year	Redemption Price
2017		103.438	%
2018		101.719	%
2019 and thereafter		100.000	%

2019 Senior Convertible Notes

On March 26, 2013, U. S. Steel issued $316 million of 2.75% Senior Convertible Notes due April 1, 2019 (the 2019 Senior Convertible Notes). U. S. Steel received net proceeds from the offering of $308 million after fees of $8 million related to the underwriting discount and third party expenses. The net proceeds from the issuance of the 2019 Senior Convertible Notes, together with the net proceeds of the concurrent 2021 Senior Notes offering (see above), were used to repurchase a portion of our 2014 Senior Convertible Notes. Interest on the 2019 Senior Convertible Notes is payable semi-annually on April 1^st and October 1^st of each year, commencing on October 1, 2013.

The initial conversion rate for the 2019 Senior Convertible Notes is 39.5491 shares of U. S. Steel common stock per $1,000 principal amount, equivalent to an initial conversion price of approximately $25.29 per share of common stock, subject to adjustment as defined in the 2019 Senior Convertible Notes. On the issuance date of the 2019 Senior Convertible Notes, the market price of U. S. Steel’s common stock was below the stated conversion price of $25.29 and therefore, there was no beneficial conversion option to the holders. Based on the initial conversion rate, the 2019 Senior Convertible Notes are convertible into 12,507,403 shares of U. S. Steel common stock and we reserved for the possible issuance of 16,259,615 shares, which is the maximum amount that could be issued upon conversion. Holders may convert their notes at their option prior to the close of business on the business day immediately preceding October 1, 2018 only under certain circumstances (as described in the 2019 Senior Convertible Notes). On or after October 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2019 Senior Convertible Notes at any time. Upon conversion, we will satisfy our conversion obligation by paying or delivering, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock at our election. Any unconverted 2019 Senior Convertible Notes mature at par on April 1, 2019.

U. S. Steel may not redeem the 2019 Senior Convertible Notes prior to April 5, 2017. On or after April 5, 2017, we may redeem for cash all or part of the 2019 Senior Convertible Notes, at our

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option, under certain circumstances. The redemption price will equal 100% of the principal amount of the 2019 Senior Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

If U. S. Steel undergoes a fundamental change, as defined in the 2019 Senior Convertible Notes, holders may require us to repurchase the 2019 Senior Convertible Notes in whole or in part for cash at a price equal to 100% of the principal amount of the 2019 Senior Convertible Notes to be purchased plus any accrued and unpaid interest (including additional interest, if any) up to, but excluding the repurchase date.

Although the 2019 Senior Convertible Notes were issued at par, for accounting purposes the proceeds received from the issuance of the notes are allocated between debt and equity to reflect the fair value of the conversion option embedded in the notes and the fair value of similar debt without the conversion option. As a result, $53 million of the gross proceeds of the 2019 Senior Convertible Notes was recorded as an increase in additional paid-in capital with the offsetting amount recorded as a debt discount. The debt discount will be amortized over the term of the 2019 Senior Convertible Notes using an interest rate of 6.2% (the estimated effective borrowing rate for nonconvertible debt at the time of issuance) which will accrete the carrying value of the notes to the principal amount at maturity. As of March 31, 2013, the remaining unamortized debt discount was $53 million and the net carrying amount of the 2019 Senior Convertible Notes was $263 million.

Similar to our other senior notes, the 2019 Senior Convertible Notes and the 2021 Senior Notes contain covenants limiting our ability to create liens, to enter into sale-leaseback transactions and to consolidate, merge or transfer all, or substantially all of our assets. They also contain provisions requiring the purchase of the notes upon a change in control under certain specified circumstances, as well as other customary provisions. In addition, certain payment defaults on other indebtedness are a default under the 2019 Senior Convertible Notes.

2014 Senior Convertible Notes

In March 2013, U. S. Steel repurchased approximately $542 million aggregate principal amount of our 4.00% Senior Convertible Notes due 2014, reducing the outstanding principal amount of the notes to $321 million.

The repurchases were funded with the net proceeds from the 2021 Senior Notes and the 2019 Senior Convertible Notes and cash. The aggregate purchase price, including accrued and unpaid interest and fees, for the convertible notes repurchased was approximately $580 million. U. S. Steel recorded a pretax charge of $34 million to net interest and other financial costs (see Note 7) in the first quarter of 2013 related mainly to the repurchase premiums.

Amended Credit Agreement

As of March 31, 2013, there were no amounts drawn on the Amended Credit Agreement, which expires July 20, 2016, and inventory values calculated in accordance with the Amended Credit Agreement supported the full $875 million of the facility. Under the Amended Credit Agreement, U. S. Steel must maintain a fixed charge coverage ratio (as further defined in the Amended Credit Agreement) of at least 1.00 to 1.00 for the most recent four consecutive quarters when availability under the Amended Credit Agreement is less than the greater of 10% of the total aggregate commitments and $87.5 million. Since availability was greater than $87.5 million, compliance with the fixed charge coverage ratio covenant was not applicable. If the value of inventory does not support the full amount of the facility or we are not able to meet this covenant in the future, the full amount of this facility would not be available to the Company.

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Receivables Purchase Agreement

As of March 31, 2013, U. S. Steel has a Receivables Purchase Agreement (RPA) under which eligible trade accounts receivable are sold, on a daily basis without recourse, to U. S. Steel Receivables, LLC (USSR), a wholly owned, bankruptcy-remote, special purpose entity used only for the securitization program. As U. S. Steel accesses this facility, USSR sells senior undivided interests in the receivables to certain third-party commercial paper conduits, while maintaining a subordinated undivided interest in a portion of the receivables. U. S. Steel has agreed to continue servicing the sold receivables at market rates.

At both March 31, 2013 and December 31, 2012, eligible accounts receivable supported $625 million of availability under the RPA and there were no receivables sold to third-party conduits under this facility.

USSR pays the conduits a discount based on the conduits’ borrowing costs plus incremental fees. We paid $1 million in each of the three month periods ended March 31, 2013 and 2012. These costs are included in other financial costs in the statement of operations.

Generally, the facility provides that as payments are collected from the sold accounts receivables, USSR may elect to have the conduits reinvest the proceeds in new eligible accounts receivable. As there was no activity under this facility during the three months ended March 31, 2013, there were no collections reinvested. During the three months ended March 31, 2012, collection of accounts receivable of approximately $1,175 million were reinvested.

The eligible accounts receivable and receivables sold to third-party conduits are summarized below:

(In millions)	March 31, 2013		December 31, 2012
Balance of accounts receivable-net, eligible for sale to third-party conduits	$	1,192	$	1,127
Accounts receivable sold to third-party conduits		-		-
Balance included in Receivables on the balance sheet of U. S. Steel	$	1,192	$	1,127

The net book value of U. S. Steel’s retained interest in the receivables represents the best estimate of the fair market value due to the short-term nature of the receivables. The retained interest in the receivables is recorded net of the allowance for bad debts, which historically have not been significant.

The facility may be terminated on the occurrence and failure to cure certain events, including, among others, failure of USSR to maintain certain ratios related to the collectability of the receivables and failure to make payment under its material debt obligations and may also be terminated upon a change of control. The facility expires on July 18, 2014.

Change in control event

In the event of a change in control of U. S. Steel, debt obligations totaling $3,212 million at March 31, 2013, which includes the Senior Notes and Senior Convertible Notes, may be declared immediately due and payable. In addition, the Amended Credit Agreement and the RPA may be terminated and any amount outstanding thereunder may be declared immediately due and payable. In such event, U. S. Steel may also be required to either repurchase the leased Fairfield slab caster for $20 million or provide a letter of credit to secure the remaining obligation.

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U. S. Steel Košice (USSK) credit facilities

At March 31, 2013, USSK had no borrowings under its €200 million (approximately $256 million) unsecured revolving credit facility.

At March 31, 2013, USSK had no borrowings under its €20 million unsecured credit facilities (which approximated $25 million) and the availability was approximately $24 million due to approximately $1 million of customs and other guarantees outstanding.

14. Asset Retirement Obligations

U. S. Steel’s asset retirement obligations (AROs) primarily relate to mine and landfill closure and post-closure costs. The following table reflects changes in the carrying values of AROs:

(In millions)	March 31, 2013			December 31, 2012
Balance at beginning of year	$	33		$	38
Additional obligations incurred		-			2
Obligations settled		(2	)		(9	)  (a)
Accretion expense		1			2
Balance at end of period	$	32		$	33

^(a) Includes $2 million as a result of the sale of USSS on January 31, 2012. See Note 4 for additional details.

Certain AROs related to disposal costs of the majority of fixed assets at our integrated steel facilities have not been recorded because they have an indeterminate settlement date. These AROs will be initially recognized in the period in which sufficient information exists to estimate their fair value.

15. 2012 Labor Agreements

Effective September 1, 2012, U. S. Steel and its U. S. Steel Tubular Products, Inc. subsidiary reached new labor agreements with the United Steelworkers (USW), which cover approximately 16,600 employees at our flat-rolled, tubular, coke-making and iron ore operations in the United States (the 2012 Labor Agreements). The 2012 Labor Agreements expire on September 1, 2015. The agreements provided for a $2,000 lump sum payment that was paid to each covered active USW member in October 2012, which resulted in U. S. Steel recognizing a pretax charge of $35 million in the third quarter of 2012. The agreements also provide for a lump sum payment of $500, effective April 1, 2014, to each covered USW member active on that date which is being accrued over the requisite service period.

The 2012 Labor Agreements contain no-strike provisions and include wage increases of 2.0 percent on September 1, 2013 and 2.5 percent on January 1, 2015. The 2012 Labor Agreements also provide for pension and other benefit changes for both current employees and retirees.

16. Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, current accounts and notes receivable, accounts payable, bank checks outstanding and accrued interest included in the Consolidated Balance Sheet approximate fair value. See Note 12 for disclosure of U. S. Steel’s derivative instruments, which are accounted for at fair value on a recurring basis.

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The following table summarizes U. S. Steel’s financial assets and liabilities that were not carried at fair value at March 31, 2013 and December 31, 2012.

	March 31, 2013				December 31, 2012
(In millions)	Fair Value		Carrying Amount		Fair Value		Carrying Amount
Financial assets:
Investments and long-term receivables (a)	$	41	$	41	$	39	$	39
Financial liabilities:
Debt (b)	$	4,082	$	3,898	$	4,113	$	3,902

^(a)  Excludes equity method investments.

^(b)  Excludes capital lease obligations.

The following methods and assumptions were used to estimate the fair value of financial instruments included in the table above:

Investments and long-term receivables: Fair value was based on Level 2 inputs which were discounted cash flows. U. S. Steel is subject to market risk and liquidity risk related to its investments.

Long-term debt instruments: Fair value was determined using Level 2 inputs which were derived from quoted market prices and is based on the yield on public debt where available or current borrowing rates available for financings with similar terms and maturities.

Fair value of the financial assets and liabilities disclosed herein is not necessarily representative of the amount that could be realized or settled, nor does the fair value amount consider the tax consequences of realization or settlement.

Financial guarantees are U. S. Steel’s only unrecognized financial instrument. For details relating to financial guarantees see Note 20.

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17. Statement of Changes in Stockholders’ Equity

The following table reflects the first three months of 2013 and 2012 reconciliation of the carrying amount of total equity, equity attributable to United States Steel Corporation and equity attributable to the noncontrolling interests:

Three Months Ended March 31, 2013	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,478					$	3,463		$	(3,268	)	$	151	$	(521	)	$	3,652	$	1
Comprehensive income:
Net loss		(73	)		(73	)		(73	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		69			69						69
Currency translation adjustment		(37	)		(37	)					(37	)
Issuance of conversion option in Senior Convertible Notes, net of tax		32																	32
Employee stock plans		10														1			9
Dividends paid on common stock		(7	)					(7	)
Other		(1	)					(1	)
Balance at March 31, 2013	$	3,471		$	(41	)	$	3,382		$	(3,236	)	$	151	$	(520	)	$	3,693	$	1

Three Months Ended March 31, 2012	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,501					$	3,616		$	(3,367	)	$	151	$	(550	)	$	3,650	$	1
Comprehensive income:
Net loss		(219	)		(219	)		(219	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		70			70						70
Currency translation adjustment		107			107						107
Employee stock plans		9														1			8
Dividends paid on common stock		(7	)					(7	)
Balance at March 31, 2012	$	3,461		$	(42	)	$	3,390		$	(3,190	)	$	151	$	(549	)	$	3,658	$	1

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18. Reclassifications from Accumulated Other Comprehensive Income (AOCI)

(in millions) (a)	Pension and Other Benefit Items			Foreign Currency Items			Total
Balance at December 31, 2012	$	(3,613	)	$	345		$	(3,268	)
Other comprehensive income before reclassifications		-			(37	)		(37	)
Amounts reclassified from AOCI (b)		69			-			69
Net current-period other comprehensive income		69			(37	)		32
Balance at March 31, 2013	$	(3,544	)	$	308		$	(3,236	)

^(a) All amounts are net of tax. Amounts in parentheses indicate debits.

^(b) See table below for further details.

(In millions) (a)	Details about AOCI components	Amount reclassified from AOCI
	Amortization of pension and other benefit items
	Prior service costs	$	(3	)  (b)
	Actuarial gains/(losses)		(100	)  (b)
	Total before tax		(103	)
	Tax benefit		34
	Net of tax	$	(69	)

^(a) Amounts in parentheses indicate debits to income/loss.

^(b) These AOCI components are included in the computation of net periodic pension cost (see Note 6 for additional details).

19. Related Party Transactions

Net sales to related parties and receivables from related parties primarily reflect sales of steel products to equity investees. Generally, transactions are conducted under long-term market-based contractual arrangements. Related party sales and service transactions were $278 million and $339 million for the three months ended March 31, 2013 and 2012, respectively.

Purchases from related parties for outside processing services provided by equity investees amounted to $19 million and $13 million for the three months ended March 31, 2013 and 2012, respectively. Purchases of iron ore pellets from related parties amounted to $64 million and $59 million for the three months ended March 31, 2013 and 2012, respectively.

Accounts payable to related parties include amounts collected on behalf of PRO-TEC Coating Company (PRO-TEC) of $88 million and $75 million at March 31, 2013 and December 31, 2012, respectively. U. S. Steel, as PRO-TEC’s exclusive sales agent, is responsible for credit risk related to PRO-TEC’s receivables. U. S. Steel also provides PRO-TEC marketing, selling and customer service functions. Payables to other related parties totaled $3 million at both March 31, 2013 and December 31, 2012.

20. Contingencies and Commitments

U. S. Steel is the subject of, or party to, a number of pending or threatened legal actions, contingencies and commitments involving a variety of matters, including laws and regulations relating to the environment. Certain of these matters are discussed below. The ultimate resolution

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of these contingencies could, individually or in the aggregate, be material to the consolidated financial statements. However, management believes that U. S. Steel will remain a viable and competitive enterprise even though it is possible that these contingencies could be resolved unfavorably.

U. S. Steel accrues for estimated costs related to existing lawsuits, claims and proceedings when it is probable that it will incur these costs in the future.

Asbestos matters – As of March 31, 2013, U. S. Steel was a defendant in approximately 780 active cases involving approximately 3,320 plaintiffs. Many of these cases involve multiple defendants (typically from fifty to more than one hundred). About 2,560, or approximately 77 percent, of these plaintiff claims are currently pending in jurisdictions which permit filings with massive numbers of plaintiffs. Based upon U. S. Steel’s experience in such cases, it believes that the actual number of plaintiffs who ultimately assert claims against U. S. Steel will likely be a small fraction of the total number of plaintiffs. During the three months ended March 31, 2013, U. S. Steel paid approximately $1 million in settlements. These settlements and other dispositions resolved approximately 75 claims. New case filings in the first three months of 2013 added approximately 65 claims. At December 31, 2012, U. S. Steel was a defendant in approximately 790 active cases involving approximately 3,330 plaintiffs. During 2012, U. S. Steel paid approximately $15 million in settlements. These settlements and other dispositions resolved approximately 190 claims. New case filings in the year ended December 31, 2012 added approximately 285 claims. Most claims filed in 2013 and 2012 involved individual or small groups of claimants as many jurisdictions no longer permit the filing of mass complaints.

Historically, these claims against U. S. Steel fall into three major groups: (1) claims made by persons who allegedly were exposed to asbestos at U. S. Steel facilities (referred to as “premises claims”); (2) claims made by industrial workers allegedly exposed to products manufactured by U. S. Steel; and (3) claims made under certain federal and general maritime laws by employees of former operations of U. S. Steel. In general, the only insurance available to U. S. Steel with respect to asbestos claims is excess casualty insurance, which has multi-million dollar retentions. To date, U. S. Steel has received minimal payments under these policies relating to asbestos claims.

These asbestos cases allege a variety of respiratory and other diseases based on alleged exposure to asbestos. U. S. Steel is currently a defendant in cases in which a total of approximately 265 plaintiffs allege that they are suffering from mesothelioma. The potential for damages against defendants may be greater in cases in which the plaintiffs can prove mesothelioma.

In many cases in which claims have been asserted against U. S. Steel, the plaintiffs have been unable to establish any causal relationship to U. S. Steel or its products or premises; however, with the decline in mass plaintiff cases, the incidence of claimants actually alleging a claim against U. S. Steel is increasing. In addition, in many asbestos cases, the claimants have been unable to demonstrate that they have suffered any identifiable injury or compensable loss at all; that any injuries that they have incurred did in fact result from alleged exposure to asbestos; or that such alleged exposure was in any way related to U. S. Steel or its products or premises.

The amount U. S. Steel has accrued for pending asbestos claims is not material to U. S. Steel’s financial position. U. S. Steel does not accrue for unasserted asbestos claims because it is not possible to determine whether any loss is probable with respect to such claims or even to estimate the amount or range of any possible losses. The vast majority of pending claims against U. S. Steel allege so-called “premises” liability-based alleged exposure on U. S. Steel’s current or

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former premises. These claims are made by an indeterminable number of people such as truck drivers, railroad workers, salespersons, contractors and their employees, government inspectors, customers, visitors and even trespassers. In most cases the claimant also was exposed to asbestos in non-U. S. Steel settings; the relative periods of exposure between U. S. Steel and non-U. S. Steel settings vary with each claimant; and the strength or weakness of the causal link between U. S. Steel exposure and any injury vary widely as do the nature and severity of the injury claimed.

We are unable to estimate the ultimate outcome of asbestos-related lawsuits, claims and proceedings due to the unpredictable nature of personal injury litigation. Despite this uncertainty, management believes that the ultimate resolution of these matters will not have a material adverse effect on U. S. Steel’s financial condition, although the resolution of such matters could significantly impact results of operations for a particular quarter. Among the factors considered in reaching this conclusion are: (1) it has been many years since U. S. Steel employed maritime workers or manufactured or sold asbestos containing products; (2) most asbestos containing material was removed or remediated at U. S. Steel facilities many years ago; and (3) U. S. Steel’s history of trial outcomes, settlements and dismissals.

Environmental matters – U. S. Steel is subject to federal, state, local and foreign laws and regulations relating to the environment. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for noncompliance. Changes in accrued liabilities for remediation activities are summarized in the following table:

(In millions)	Three Months Ended March 31, 2013
Beginning of period	$	203
Accruals for environmental remediation deemed probable and reasonably estimable		4
Payments		(4	)
End of period	$	203

Accrued liabilities for remediation activities are included in the following balance sheet lines:

(In millions)	March 31, 2013		December 31, 2012
Accounts payable	$	18	$	21
Deferred credits and other noncurrent liabilities		185		182
Total	$	203	$	203

Expenses related to remediation are recorded in cost of sales and totaled $4 million and $3 million for the three months ended March 31, 2013 and 2012, respectively. It is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred. Due to uncertainties inherent in remediation projects and the associated liabilities, it is possible that total remediation costs for active matters and projects with ongoing study and scope development may exceed the accrued liabilities by as much as 15 to 30 percent.

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Remediation Projects

U. S. Steel is involved in environmental remediation projects at or adjacent to several current and former U. S. Steel facilities and other locations that are in various stages of completion ranging from initial characterization through post-closure monitoring. Based on the anticipated scope and degree of uncertainty of projects, we categorize projects as follows:

(1) Projects with Ongoing Study and Scope Development are those projects which are still in the study and development phase. For these projects the extent of remediation that may be required is not yet known, the remediation methods and plans are not yet developed, and cost estimates cannot be determined. Therefore, material costs, in addition to the accrued liabilities for these projects, are reasonably possible.

(2) Significant Projects with Defined Scope are those projects with significant accrued liabilities, a defined scope and little likelihood of material additional costs.

(3) Other Projects are those projects with relatively small accrued liabilities for which we believe that, while additional costs are possible, they are not likely to be material, and those projects for which we do not yet possess sufficient information to estimate potential costs to U. S. Steel.

Projects with Ongoing Study and Scope Development – There are five environmental remediation projects where reasonably possible additional costs for completion are not currently estimable, but could be material. These projects are four Resource Conservation and Recovery Act (RCRA) programs (at Fairfield Works, Lorain Tubular, USS-POSCO Industries (UPI) and the Fairless Plant) and a voluntary remediation program at the former steel making plant at Joliet, Illinois. As of March 31, 2013, accrued liabilities for these projects totaled $3 million for the costs of ongoing studies, investigations, and design. It is reasonably possible that additional liabilities associated with future requirements regarding studies, investigations, design and remediation for these projects could be as much as $25 million to $45 million. Depending on agency negotiations and other factors, the UPI project may become defined in 2013.

Significant Projects with Defined Scope – As of March 31, 2013, a total of $60 million was accrued for projects at or related to Gary Works where the scope of work is defined.

Additional projects with defined scope greater than or equal to $5 million are the St. Louis Estuary and Upland Project in Duluth, Minnesota and a project at U. S. Steel’s former Geneva Works in Geneva, Utah. As of March 31, 2013, accrued liabilities for these two additional projects totaled $86 million. U. S. Steel does not expect material additional costs related to these projects.

Other Projects – There are six other environmental remediation projects which each had an accrued liability of between $1 million and $5 million. The total accrued liability for these projects at March 31, 2013 was $13 million. These projects have progressed through a significant portion of the design phase and material additional costs are not expected.

The remaining environmental remediation projects each had an accrued liability of less than $1 million. The total accrued liability for these projects at March 31, 2013 was $7 million. We do not foresee material additional liabilities for any of these sites.

Post-Closure Costs – Accrued liabilities for post-closure site monitoring and other costs at various closed landfills totaled $28 million at March 31, 2013 and were based on known scopes of work.

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Administrative and Legal Costs – As of March 31, 2013, U. S. Steel had an accrued liability of $6 million for administrative and legal costs related to environmental remediation projects. These accrued liabilities were based on projected administrative and legal costs for the next three years and do not change significantly from year to year.

Capital Expenditures – For a number of years, U. S. Steel has made substantial capital expenditures to bring existing facilities into compliance with various laws relating to the environment. In the first three months of 2013 and 2012, such capital expenditures totaled $10 million and $16 million, respectively. U. S. Steel anticipates making additional such expenditures in the future; however, the exact amounts and timing of such expenditures are uncertain because of the continuing evolution of specific regulatory requirements.

CO₂ Emissions – Current and potential regulation of Greenhouse Gas (GHG) emissions remains a significant issue for the steel industry, particularly for integrated steel producers such as U. S. Steel. The regulation of carbon dioxide (CO₂) emissions has either become law or is being considered by legislative bodies of many nations, including countries where we have operating facilities. The European Union (EU) has established GHG regulations based upon national allocations and a cap and trade system. In Canada, both the federal and Ontario governments have issued proposed requirements for GHG emissions. In the United States, the Environmental Protection Agency (EPA) has published rules for regulating GHG emissions for certain facilities and has implemented various reporting requirements as further described below. In 2010, GHG legislation was passed in the House of Representatives and introduced in the Senate. The federal courts are considering several suits that challenge the EPA’s authority to regulate GHG emissions under the Clean Air Act. We do not know what action, if any, may be taken by the current or future sessions of Congress.

The EU has issued regulations under their cap and trade system for the period 2013-2020 (NAP III) that are more stringent than those in NAP II. USSK has not yet been advised of its free allocation for NAP III.

On May 13, 2010, the EPA published its final Greenhouse Gas Tailoring Rule establishing a mechanism for regulating GHG emissions from facilities through the Clean Air Act’s Prevention of Significant Deterioration (PSD) permitting process. U. S. Steel reported its emissions under these rules in accordance with the regulation and its deadlines. Since 2011, new projects that increase GHG emissions by more than 75,000 tons per year have new PSD requirements based on best available control technology (BACT), but only if the project also significantly increases emissions of at least one non-GHG pollutant. Only existing sources with Title V permits or new sources obtaining Title V permits for non-GHG pollutants will also be required to address GHG emissions. As of July 1, 2011, new sources not already subject to Title V requirements that emit over 100,000 tons per year, or modifications to existing permits that increase GHG emissions by more than 75,000 tons per year, are subject to PSD and Title V requirements. On November 17, 2010 the EPA issued its “PSD and Title V Permitting Guidance for Greenhouse Gases” and “Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry.” With this guidance, EPA intends to help state and local air permitting authorities identify greenhouse gas reductions under the Clean Air Act. Additionally, the EPA revised the National Ambient Air Quality Standards (NAAQS) for nitrogen oxide, sulfur dioxide and lead in 2010 and is in the process of revising the NAAQS for 2.5 micron particulate matter, ozone and sulfur dioxides.

It is impossible to estimate the timing or impact of these or other future government action on U. S. Steel, although it could be significant. Such impacts may include substantial capital expenditures, costs for emission allowances, restriction of production, and higher prices for coking coal, natural gas and electricity generated by carbon based systems.

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European Union (EU) Environmental Requirements – Slovakia is currently considering a law implementing an EU Waste Framework Directive that would more strictly regulate waste disposal and increase fees for waste disposed of in landfills including privately owned landfills. The intent of the waste directive is to encourage recycling and because Slovakia has not adopted implementing legislation, we cannot estimate the full financial impact of this prospective legislation at this time.

The EU’s Industry Emission Directive will require implementation of EU determined best available techniques (BATs) to reduce environmental impacts as well as compliance with BAT associated emission levels. It contains operational requirements for air emissions, waste water discharges, solid waste disposal and energy conservation, dictates certain operating practices and imposes stricter emission limits. Producers will be required to be in compliance with the iron and steel BAT by March 8, 2016. We are evaluating the costs of complying with BAT, but our most recent broad estimate of likely capital expenditures is $300 million to $400 million over the 2013 to 2016 period. We are currently investigating the possibility of obtaining EU grants to fund a portion of those capital expenditures. We also believe that there will be increased operating costs, such as increased energy and maintenance costs, but we are currently unable to reliably estimate this amount.

Environmental and other indemnifications – Throughout its history, U. S. Steel has sold numerous properties and businesses and many of these sales included indemnifications and cost sharing agreements related to the assets that were sold. These indemnifications and cost sharing agreements have related to the condition of the property, the approved use, certain representations and warranties, matters of title and environmental matters. While most of these provisions have not specifically dealt with environmental issues, there have been transactions in which U. S. Steel indemnified the buyer for non-compliance with past, current and future environmental laws related to existing conditions and there can be questions as to the applicability of more general indemnification provisions to environmental matters. Most recent indemnifications and cost sharing agreements are of a limited nature only applying to non-compliance with past and/or current laws. Some indemnifications and cost sharing agreements only run for a specified period of time after the transactions close and others run indefinitely. In addition, current owners of property formerly owned by U. S. Steel may have common law claims and contribution rights against U. S. Steel for environmental matters. The amount of potential environmental liability associated with these transactions and properties is not estimable due to the nature and extent of the unknown conditions related to the properties sold. Aside from the environmental liabilities already recorded as a result of these transactions due to specific environmental remediation activities and cases (included in the $203 million of accrued liabilities for remediation discussed above), there are no other known environmental liabilities related to these transactions.

Guarantees – The maximum guarantees of the indebtedness of unconsolidated entities of U. S. Steel totaled $29 million at March 31, 2013. In the event that any default related to the guaranteed indebtedness occurs, U. S. Steel has access to its interest in the assets of the investees to reduce its potential losses under the guarantees.

Antitrust Class Actions – In a series of lawsuits filed in federal court in the Northern District of Illinois beginning September 12, 2008, individual direct or indirect buyers of steel products have asserted that eight steel manufacturers, including U. S. Steel, conspired in violation of antitrust laws to restrict the domestic production of raw steel and thereby to fix, raise, maintain or stabilize the price of steel products in the United States. The cases are filed as class actions and claim treble damages for the period 2005 to present, but do not allege any damage amounts. U. S. Steel is vigorously defending these lawsuits and does not believe that it is probable a liability regarding these matters has been incurred. We are unable to estimate a range of possible loss at this time.

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EPA Region V Federal Lawsuit – On August 1, 2012, the U.S. government, joined by the States of Illinois, Indiana and Michigan, filed a complaint in the Northern District of Indiana alleging various CAA and State air regulatory violations that were to have allegedly occurred at Gary Works, Granite City Works, and Great Lakes Works, our three integrated iron and steel facilities located in EPA Region V. The Complaint alleges that Gary Works failed to obtain the proper pre-construction permit for a routine reline of its Blast Furnace No. 4 in 1990, and that the three facilities failed to meet certain operational, maintenance, opacity, and recordkeeping requirements under the CAA and its implementing regulations. The Complaint requests relief in the form of statutory penalties for each violation and for injunctive relief. U. S. Steel believes that the claims asserted in the Complaint are not justified and are without statutory foundation. On September 21, 2012, U. S. Steel filed a motion to dismiss the U.S. government’s claims for relief regarding the 1990 reline of the Gary Blast Furnace No. 4 and filed an answer to the remaining allegations in the Complaint. On January 24, 2013, the Court heard oral arguments regarding the motion to dismiss. The motion is still pending before the Court. U. S. Steel will continue to vigorously defend against these claims. At this time, the potential outcome is not reasonably estimable.

Randle Reef – The Canadian and Ontario governments have identified for remediation a sediment deposit, commonly referred to as Randle Reef, in Hamilton Harbor near USSC’s Hamilton Works, for which the regulatory agencies estimate expenditures with a net present value of approximately C$120 million (approximately $118 million). The national and provincial governments have each allocated C$40 million (approximately $39 million) for this project. Local sources, including industry, have also agreed to provide funding of C$40 million (approximately $39 million) for this project. USSC has committed to contribute approximately 11,000 tons of hot rolled steel and to fund C$2 million (approximately $2 million). The steel contribution is expected to be made in 2014. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $10 million reflecting the contribution commitment.

Other contingencies – Under certain operating lease agreements covering various equipment, U. S. Steel has the option to renew the lease or to purchase the equipment at the end of the lease term. If U. S. Steel does not exercise the purchase option by the end of the lease term, U. S. Steel guarantees a residual value of the equipment as determined at the lease inception date (totaling approximately $12 million at March 31, 2013). No liability has been recorded for these guarantees as the potential loss is not probable.

Insurance – U. S. Steel maintains insurance for certain property damage, equipment, business interruption and general liability exposures; however, insurance is applicable only after certain deductibles and retainages. U. S. Steel is self-insured for certain other exposures including workers’ compensation (where permitted by law) and auto liability. Liabilities are recorded for workers’ compensation and personal injury obligations. Other costs resulting from losses under deductible or retainage amounts or not otherwise covered by insurance are charged against income upon occurrence.

U. S. Steel uses surety bonds, trusts and letters of credit to provide whole or partial financial assurance for certain obligations such as workers’ compensation. The total amount of active surety bonds, trusts and letters of credit being used for financial assurance purposes was approximately $165 million as of March 31, 2013, which reflects U. S. Steel’s maximum exposure under these financial guarantees, but not its total exposure for the underlying obligations. Most of the trust arrangements and letters of credit are collateralized by restricted cash. Restricted cash, which is recorded in other current and noncurrent assets, totaled $153 million at March 31, 2013, of which $4 million was classified as current, and $181 million at December 31, 2012, of which $5 million was classified as current. Restricted cash at March 31, 2013 also includes $62 million to fund certain capital projects at Gary Works, our Clairton Plant and Granite City Works. The proceeds become unrestricted as capital expenditures for these projects are made.

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Capital Commitments – At March 31, 2013, U. S. Steel’s contractual commitments to acquire property, plant and equipment totaled $254 million.

Contractual Purchase Commitments – U. S. Steel is obligated to make payments under contractual purchase commitments, including unconditional purchase obligations. Payments for contracts with remaining terms in excess of one year are summarized below (in millions):

Remainder of 2013	2014	2015	2016	2017	Later Years	Total
$672	$704	$337	$322	$310	$1,722	$	4,067

The majority of U. S. Steel’s unconditional purchase obligations relates to the supply of industrial gases, energy and utility services with terms ranging from two to 15 years. Unconditional purchase obligations also include coke and steam purchase commitments related to a coke supply agreement with Gateway Energy & Coke Company LLC under which Gateway is obligated to supply 90 percent to 105 percent of the expected annual capacity of the heat recovery coke plant, and U. S. Steel is obligated to purchase the coke from Gateway at the contract price. As of March 31, 2013, a maximum default payment of approximately $255 million would apply if U. S. Steel terminates the agreement.

Total payments relating to unconditional purchase obligations were approximately $183 million and $185 million for the three months ended March 31, 2013 and 2012, respectively.

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

Certain sections of Management’s Discussion and Analysis include forward-looking statements concerning trends or events potentially affecting the businesses of United States Steel Corporation (U. S. Steel). These statements typically contain words such as “anticipates,” “believes,” “estimates,” “expects,” “intends” or similar words indicating that future outcomes are not known with certainty and are subject to risk factors that could cause these outcomes to differ significantly from those projected. In accordance with “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, these statements are accompanied by cautionary language identifying important factors, though not necessarily all such factors that could cause future outcomes to differ materially from those set forth in forward-looking statements. For discussion of risk factors affecting the businesses of U. S. Steel, see Item 1A. Risk Factors and “Supplementary Data – Disclosures About Forward-Looking Statements” in U. S. Steel’s Annual Report on Form 10-K for the year ended December 31, 2012. References in this Quarterly Report on Form 10-Q to “U. S. Steel,” “the Company,” “we,” “us” and “our” refer to U. S. Steel and its consolidated subsidiaries unless otherwise indicated by the context.

RESULTS OF OPERATIONS

Net sales by segment for the first quarter of 2013 and 2012 are set forth in the following table:

	Quarter Ended March 31,
(Dollars in millions, excluding intersegment sales)	2013		2012		% Change
Flat-rolled Products (Flat-rolled)	$	3,103	$	3,300		-6	%
U. S. Steel Europe (USSE)		783		815		-4	%
Tubular Products (Tubular)		686		946		-27	%
Total sales from reportable segments		4,572		5,061		-10	%
Other Businesses		23		111		-79	%
Net sales	$	4,595	$	5,172		-11	%

Management’s analysis of the percentage change in net sales for U. S. Steel’s reportable business segments for the quarter ended March 31, 2013 versus the quarter ended March 31, 2012 is set forth in the following table:

Quarter Ended March 31, 2013 versus Quarter Ended March 31, 2012

	Steel Products (a)
	Volume			Price			Mix			FX  (b)			Coke & Other			Net Change
Flat-rolled		-1	%		-6	%		0	%		0	%		1	%		-6	%
USSE		1	%		-4	%		-2	%		1	%		0	%		-4	%
Tubular		-18	%		-10	%		2	%		0	%		-1	%		-27	%

^(a) Excludes intersegment sales

^(b)  Foreign currency translation effects

Net sales were $4,595 million in the first quarter of 2013, compared with $5,172 million in the same quarter last year. The decrease in sales for the Flat-rolled segment reflected lower average realized prices (decrease of $45 per ton) as a result of lower spot market pricing during the first quarter of 2013 as compared to the comparable period in 2012 and decreased shipments (decrease of 74 thousand

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tons). The decrease in sales for the European segment was primarily due to decreased average realized euro-based prices (decrease of €27 per ton). The decrease in sales for the Tubular segment reflected lower average realized prices (decrease of $171 per ton) and deceased shipments (decrease of 101 thousand tons), primarily as a result of decreased drilling activity in the first quarter of 2013 as compared to the same period in 2012.

Pension and other benefits costs

Pension and other benefit costs are reflected in our cost of sales and selling, general and administrative expense line items in the Consolidated Statements of Operations.

Defined benefit and multiemployer pension plan costs totaled $95 million in the first quarter of 2013, compared to $100 million in the first quarter of 2012. The $5 million decrease is primarily due to the natural maturation of our pension plans and a higher market related value of assets.

Costs related to defined contribution plans totaled $11 million in the first quarter of 2013 compared to $10 million in the first quarter of 2012.

Other benefit costs totaled $14 million in the first quarter of 2013, compared to $30 million in the first quarter of 2012. The $16 million decrease is primarily due to program changes arising out of the 2012 Labor Agreements.

Net periodic pension cost, including multiemployer plans, is expected to total approximately $385 million in 2013. Total other benefits costs in 2013 are expected to total approximately $55 million.

A sensitivity analysis of the projected incremental effect of a hypothetical one percentage point change in the significant inputs used in the calculation of pension and other benefits net periodic benefit costs is provided in the following table:

	Hypothetical Rate Increase (Decrease)
(In millions of dollars)	1%			(-1%)
Expected return on plan assets
Incremental (decrease) increase in:
Net periodic pension cost	$	(103	)	$	103
Discount rate
Incremental (decrease) increase in:
Net periodic pension & other benefits costs	$	(58	)	$	53
Health care cost escalation trend rates
Incremental increase (decrease) in:
Service and interest cost components for 2013	$	11		$	(9	)

Selling, general and administrative expenses

Selling, general and administrative expenses were $145 million in the first quarter of 2013 compared to $173 million in the first quarter of 2012. The decrease is primarily related to lower other benefit costs as noted above.

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Income (loss) from operations by segment for the first quarter of 2013 and 2012 is set forth in the following table:

	Quarter Ended March 31,						% Change
(Dollars in millions)	2013			2012
Flat-rolled	$	(13	)	$	183			-107	%
USSE		38			(34	)(a)		212	%
Tubular		64			129			-50	%
Total income from reportable segments		89			278			-68	%
Other Businesses		5			17			-71	%
Segment income from operations		94			295			-68	%
Postretirement benefit expense		(56	)		(77	)		27	%
Other items not allocated to segments:
Net loss on sale of assets		—			(310	)
Property tax settlements		—			19
Total income (loss) from operations	$	38		$	(73	)		152	%

^(a)  Includes a loss from operations for USSK of ($17) million for the quarter ended March 31, 2012.

Segment results for Flat-rolled

	Quarter Ended March 31,						% Change
	2013			2012
(Loss) income from operations ($ millions)	$	(13	)	$	183			-107	%
Gross margin		5	%		11	%		-6	%
Raw steel production (mnt)		4,920			5,043			-2	%
Capability utilization		82	%		83	%		-1	%
Steel shipments (mnt)		4,018			4,092			-2	%
Average realized steel price per ton	$	719		$	764			-6	%

The decrease in Flat-rolled results in the first quarter of 2013 compared to the same period in 2012 resulted from a decrease in average realized prices (approximately $205 million), lower steel substrate sales to our Tubular segment (approximately $40 million), increased energy costs primarily due to higher natural gas costs (approximately $20 million), lower income from our joint ventures (approximately $15 million), increased facility repairs and maintenance and other operating costs (approximately $10 million) and a decrease in shipment volumes (approximately $10 million). These decreases were partially offset by lower raw materials costs (approximately $75 million) and lower costs for employee profit sharing (approximately $25 million).

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Segment results for USSE

	Quarter Ended March 31,
	2013			2012			% Change
Income (loss) from operations ($ millions)(a)	$	38		$	(34	)		212	%
Gross margin(a)		11	%		2	%		9	%
Raw steel production (mnt)(a)		1,203			1,240			-3	%
Capability utilization(a)		98	%		85	%		13	%
Steel shipments (mnt)(a)		1,048			1,045			—
Average realized steel price per ton(a)	$	718		$	749			-4	%

^(a)  The quarter ended March 31, 2012 includes one month of activity for USSS, which was sold on January 31, 2012 .

The improvement in USSE results in the first quarter of 2013 compared to the same period in 2012 was primarily due to lower raw materials costs (approximately $80 million), the elimination of operating losses subsequent to January 31, 2012 associated with our former Serbian operations (which were approximately $15 million) and decreased other operating costs (approximately $10 million). These improvements were partially offset by a decrease in average realized prices for USSK (approximately $35 million).

Segment results for Tubular

	Quarter Ended March 31,
	2013			2012			% Change
Income from operations ($ millions)	$	64		$	129			-50	%
Gross margin		14	%		17	%		-3	%
Steel shipments (mnt)		428			529			-19	%
Average realized steel price per ton	$	1,556		$	1,727			-10	%

The decrease in Tubular results in the first quarter of 2013 as compared to the same period in 2012 resulted mainly from a decrease in average realized prices (approximately $65 million) and a decrease in shipment volumes (approximately $30 million). These decreases were partially offset by lower substrate costs (approximately $30 million).

Results for Other Businesses

Other Businesses had income of $5 million in the first quarter of 2013, compared to income of $17 million in the first quarter of 2012.

Items not allocated to segments

The decrease in postretirement benefit expense in the first quarter of 2013 as compared to the same period in 2012 resulted from lower pension expense due to the natural maturation of the pension plans and lower retiree medical expense as a result of program changes, particularly the adoption of a fully insured plan for a large number of Medicare eligible participants.

We recorded a $310 million pretax net loss on the sale of assets in the first quarter of 2012 which consisted of a pretax loss of $399 million related to the sale of U. S. Steel Serbia (USSS) and a pretax gain of $89 million related to the sale of a majority of the operating assets of the Birmingham Southern Railroad.

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We recorded a pretax gain of $19 million related to property tax settlements that occurred in the first quarter of 2012. This was reflected as a reduction to our cost of sales.

Net interest and other financial costs

	Quarter Ended March 31,
(Dollars in millions)	2013			2012			% Change
Interest expense	$	85		$	49			73	%
Interest income		(1	)		(4	)		-75	%
Other financial costs		20			5			300	%
Total net interest and other financial costs (income)	$	104		$	50			108	%

The increase in net interest and other financial costs in the first quarter 2013 as compared to the same period last year was due to a $34 million charge related to the repurchases of a portion of our 4.00% Senior Convertible Notes due 2014 (see Note 13) and foreign currency remeasurement losses during the three months ended March 31, 2013 of $9 million as compared to remeasurement gains of $2 million during the three months ended March 31, 2012.

The income tax provision was $7 million in the first quarter of 2013 compared to $96 million in the first quarter of 2012. The tax provision does not reflect any tax benefit for pretax losses in Canada and Serbia (USSS was sold on January 31, 2012), which are jurisdictions where we have, or had, recorded a full valuation allowance on deferred tax assets, and also does not reflect any tax provision or benefit for certain foreign currency remeasurement gains and losses that are not recognized in any tax jurisdiction.

The tax provision for the first quarter of 2013 is based on an estimated annual effective rate, which requires management to make its best estimate of annual pretax income or loss. During the year, management regularly updates forecasted annual pretax results for the various countries in which we operate based on changes in factors such as prices, shipments, product mix, operating performance and cost estimates. To the extent that actual 2013 pretax results for U.S. and foreign income or loss vary from estimates used herein at the end of the most recent interim period, the actual tax provision or benefit recognized in 2013 could be materially different from the forecasted amount used to estimate the tax provision for the first quarter of 2013.

The net domestic deferred tax asset was $477 million at March 31, 2013 compared to $538 million at December 31, 2012. A substantial amount of U. S. Steel’s domestic deferred tax assets relates to employee benefits that will become deductible for tax purposes over an extended period of time as cash contributions are made to employee benefit plans and retiree benefits are paid in the future. We continue to believe it is more likely than not the net domestic deferred tax asset will be realized.

At March 31, 2013, the net foreign deferred tax asset was $58 million, net of established valuation allowances of $1,109 million. At December 31, 2012, the net foreign deferred tax asset was $57 million, net of established valuation allowances of $1,099 million. At December 31, 2012, a full valuation allowance was recorded for the net Canadian deferred tax asset primarily due to cumulative losses in Canada in recent years. The net foreign deferred tax asset will fluctuate as the value of the U.S. dollar changes with respect to the euro and the Canadian dollar. If evidence changes and it becomes more likely than not that the Company will realize the net Canadian deferred tax asset, the valuation allowance would be partially or fully reversed. Any reversal of this amount would result in a decrease to income tax expense.

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For further information on income taxes see Note 8 to the Consolidated Financial Statements.

Net loss attributable to United States Steel Corporation was $73 million in the first quarter of 2013, compared to a net loss of $219 million in the first quarter of 2012. The changes primarily reflect the factors discussed above.

BALANCE SHEET

Receivables increased by $184 million, or 9%, from year-end 2012. The increase in receivables at the end of the first quarter compared to year-end 2012 primarily reflects higher shipments during the first quarter of 2013 versus the fourth quarter of 2012.

Inventories decreased by $187 million from year-end 2012 primarily due to a reduction in raw material inventories.

Accounts Payable increased by $79 million from year-end 2012 primarily due to increased business volumes.

Long-term debt, less unamortized discount decreased by $4 million due to the issuance of $316 million 2.75% Senior Convertible Notes due 2019 ($263 million net of unamortized discount) and the issuance of $275 million 6.875% Senior Notes due 2021, offset by the repurchase of $542 million aggregate principal amount of our 4.00% Senior Notes due 2014 (see Note 13).

Employee benefits decreased by $153 million from year-end 2012 primarily due to benefit payments made in excess of the net periodic benefit expense recognized in the first quarter of 2013.

CASH FLOW

Net cash provided by operating activities was $233 million for the first quarter of 2013 compared to $426 million in the same period last year. The decrease is primarily due to lower financial results, excluding a net loss of $309 million on the sale of assets in the first quarter of 2012, and changes in working capital period over period. Additionally, in the first quarter of 2012, we made a $140 million voluntary pension contribution to our main defined benefit pension plan. There were no such contributions in the first quarter of 2013.

Changes in working capital can vary significantly depending on factors such as the timing of inventory production and purchases, which is affected by the length of our business cycles as well as our captive raw materials position, customer payments of accounts receivable and payments to vendors in the regular course of business.

Our key working capital components include accounts receivable and inventory. The accounts receivable and inventory turnover ratios for the three months and twelve months ended March 31, 2013 and 2012 are as follows:

	Three Months Ended March 31,				Twelve Months Ended March 31,
	2013		2012		2013		2012
Accounts Receivable Turnover		2.1		2.3		7.8		8.0
Inventory Turnover		1.8		1.8		7.3		7.8

Capital expenditures, in the first quarter of 2013, were $116 million, compared with $189 million in the same period in 2012. Flat-rolled capital expenditures were $96 million and included spending for

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construction of carbon alloy facilities (coke substitute) at Gary Works, trailing project costs primarily attributable to the completion of performance testing associated with our recently constructed, technologically and environmentally advanced coke battery at the Mon Valley Works’ Clairton Plant, ongoing implementation of an enterprise resource planning (ERP) system and various other infrastructure and environmental projects. Tubular capital expenditures of $8 million related to an upgrade to the Lorain No. 4 Seamless Hot Mill, infrastructure and environmental capital projects. USSE capital expenditures of $10 million consisted of spending for infrastructure and environmental projects.

U. S. Steel’s contractual commitments to acquire property, plant and equipment at March 31, 2013, totaled $254 million.

Capital expenditures, not including changes in accrued capital expenditures, for 2013 are expected to total approximately $750 million and remain focused largely on strategic, infrastructure and environmental projects. We have recently completed or neared completion on several key projects of strategic importance. We have made significant progress to improve our coke self-sufficiency and reduce our reliance on purchased coke for the steel making process through the application of advanced technologies, upgrades to our existing coke facilities and increased use of natural gas and pulverized coal in our operations. We have completed the construction of a technologically and environmentally advanced battery at the Mon Valley Works’ Clairton Plant with a projected capacity of 960,000 tons per year. Initial start-up of the battery began in November 2012. Full production is anticipated during the second quarter of 2013. We have been constructing a two module carbon alloy facility at Gary Works, which utilizes an environmentally compliant, energy efficient and flexible production technology to produce a coke substitute product. The facility has a projected capacity of 500,000 tons per year when both modules are completed. Construction of the first module is complete, and we continue to focus on the optimization and reliability of operations of that module. We are slowing construction activities on the second module at this time based on current economic conditions, our coke requirements in North America and additional work on the first module.

In an effort to increase our participation in the automotive market as vehicle emission and safety requirements become increasingly stringent, PRO-TEC Coating Company, our joint venture in Ohio with Kobe Steel, Ltd., has a new automotive continuous annealing line (CAL) that was financed at the joint venture level and began operations during the first quarter of 2013.

We are also continuing our efforts to implement an ERP system to replace our existing information technology systems, which will enable us to operate more efficiently. The completion of the ERP project is expected to provide further opportunities to streamline, standardize and centralize business processes in order to maximize cost effectiveness, efficiency and control across our global operations. We are also currently developing additional projects within our Tubular segment, such as facility enhancements and additional premium connections that will further enhance our ability to support our Tubular customers’ evolving needs.

Over the longer term, we are considering business strategies to leverage our significant iron ore position in the United States and to exploit opportunities related to the availability of reasonably priced natural gas as an alternative to coke in the iron reduction process to improve our cost competitiveness, while reducing our dependence on coal and coke. We are considering an expansion of our iron ore pellet operations at our Keewatin, MN (Keetac) facility which would increase our production capability by approximately 3.6 million tons thereby increasing our iron ore self-sufficiency. The total cost of this project as currently conceived is broadly estimated to be approximately $820 million. Final permitting for the expansion was completed in December 2011. We are examining alternative iron and steel making technologies such as gas-based, direct-reduced iron and electric arc furnace (EAF) steelmaking. Our capital investments in the future may reflect such strategies, although we expect that iron and steel-making through the blast furnace and basic oxygen furnace manufacturing processes will remain our primary processing technology for the long term.

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The foregoing statements regarding expected 2013 capital expenditures, capital projects and expected benefits from the implementation of the ERP project are forward-looking statements. Factors that may affect our capital spending and the projects include: (i) levels of cash flow from operations; (ii) changes in tax laws; (iii) general economic conditions; (iv) steel industry conditions; (v) cost and availability of capital; (vi) receipt of necessary permits; and (vii) unforeseen hazards such as contractor performance, material shortages, weather conditions, explosions or fires. There is also a risk that the completed projects will not produce at the expected levels and within the costs currently projected. Predictions regarding benefits resulting from the implementation of the ERP project are subject to uncertainties. Actual results could differ materially from those expressed in these forward-looking statements.

Restricted cash in the first quarter of 2013 primarily reflects a reduction in the use of collateralized letters of credit, which were replaced with surety bonds.

Disposal of assets in the first quarter of 2012 primarily reflects proceeds from the sale of the majority of the operating assets of Birmingham Southern Railroad Company and the Port Birmingham Terminal.

Borrowings against revolving credit facilities in the first quarter of 2012 reflect amounts drawn under USSK’s unsecured revolving credit facilities.

Repayments of revolving credit facilities in the first quarter of 2012 reflect USSK’s repayment of the outstanding borrowings under its unsecured revolving credit facilities.

Receivables Purchase Agreement Payments in the first quarter of 2012 reflect activity under the Receivables Purchase Agreement.

Issuance of long-term debt, net of financing costs in the first quarter of 2013 reflects the issuance of $316 million of 2.75% Senior Convertible Notes due 2019 and $275 million of 6.875% Senior Notes due April 2021. U. S. Steel received net proceeds of $578 million after fees related to the underwriting discounts and third party expenses. The first quarter of 2012 reflects the issuance of $400 million of 7.50% Senior Notes due 2022. U. S. Steel received net proceeds of $392 million after fees related to the underwriting discounts and third party expenses.

Repayment of long-term debt in the first quarter of 2013 reflects the repurchase of $542 million aggregate principal amount of our 4.00% Senior Convertible Notes.

LIQUIDITY AND CAPITAL RESOURCES

The following table summarizes U. S. Steel’s liquidity as of March 31, 2013:

(Dollars in millions)

Cash and cash equivalents	$	733
Amount available under $875 Million Credit Facility		875
Amount available under Receivables Purchase Agreement		625
Amount available under USSK credit facilities		280
Total estimated liquidity	$	2,513

As of March 31, 2013, $311 million of the total cash and cash equivalents was held by our foreign subsidiaries, which is indefinitely reinvested. Substantially all of the liquidity attributable to our foreign

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subsidiaries can be accessed without the imposition of income taxes through repayment of intercompany loans.

On March 26, 2013, U. S. Steel issued $316 million of 2.75% Convertible Senior Notes due 2019 and $275 million of 6.875% Senior Notes due 2021. U. S. Steel received net proceeds of $578 million from the issuances. The net proceeds were used to repurchase $542 million aggregate principal amount of our 4.00% Senior Convertible Notes due 2014.

As of March 31, 2013, there were no amounts drawn under our $875 million credit facility agreement (Amended Credit Agreement) and inventory values calculated in accordance with the Amended Credit Agreement supported the full $875 million of the facility. Under the Amended Credit Agreement, U. S. Steel must maintain a fixed charge coverage ratio (as further defined in the Amended Credit Agreement) of at least 1.00 to 1.00 for the most recent four consecutive quarters when availability under the Amended Credit Agreement is less than the greater of 10% of the total aggregate commitments and $87.5 million.

As of March 31, 2013, U. S. Steel has a Receivables Purchase Agreement (RPA) that provides liquidity and letters of credit depending upon the number of eligible domestic receivables generated by U. S. Steel. As of March 31, 2013, eligible accounts receivable supported the maximum amount eligible for sale of $625 million and there were no outstanding borrowings under this facility.

At March 31, 2013, USSK had no borrowings under its €200 million (approximately $256 million) unsecured revolving credit facility.

At March 31, 2012, USSK had no borrowings under its €20 million unsecured credit facilities (which approximated $25 million) and the availability was approximately $24 million due to approximately $1 million of outstanding customs and other guarantees.

We may from time to time seek to retire or purchase our outstanding long-term debt in open market purchases, privately negotiated transactions, exchange transactions or otherwise. Such purchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors and may be commenced or suspended at any time. The amounts involved may be material.

We use surety bonds, trusts and letters of credit to provide financial assurance for certain transactions and business activities. The use of some forms of financial assurance and collateral have a negative impact on liquidity. U. S. Steel has committed $85 million of liquidity sources for financial assurance purposes as of March 31, 2013.

At March 31, 2013, in the event of a change in control of U. S. Steel, debt obligations totaling $3,212 million, which includes the Senior Notes and the Senior Convertible Notes, may be declared immediately due and payable. In such an event, U. S. Steel may also be required to either repurchase the leased Fairfield slab caster for $20 million or provide a letter of credit to secure the remaining obligation.

The maximum guarantees of the indebtedness of unconsolidated entities of U. S. Steel totaled $29 million at March 31, 2013. In the event that any default related to the guaranteed indebtedness occurs, U. S. Steel has access to its interest in the assets of the investees to reduce its potential losses under the guarantees.

Our major cash requirements in 2013 are expected to be for capital expenditures, employee benefits and operating costs, including purchases of raw materials. We finished the first quarter of 2013 with

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$733 million of cash and cash equivalents and $2.5 billion of total liquidity. Available cash is left on deposit with financial institutions or invested in highly liquid securities with parties we believe to be creditworthy.

U. S. Steel management believes that U. S. Steel’s liquidity will be adequate to satisfy our obligations for the foreseeable future, including obligations to complete currently authorized capital spending programs. Future requirements for U. S. Steel’s business needs, including the funding of acquisitions and capital expenditures, scheduled debt maturities, contributions to employee benefit plans, and any amounts that may ultimately be paid in connection with contingencies, are expected to be financed by a combination of internally generated funds (including asset sales), proceeds from the sale of stock, borrowings, refinancings and other external financing sources.

Our opinion regarding liquidity is a forward-looking statement based upon currently available information. To the extent that operating cash flow is materially lower than recent levels or external financing sources are not available on terms competitive with those currently available, future liquidity may be adversely affected.

Off-balance Sheet Arrangements

U. S. Steel did not enter into any new material off-balance sheet arrangements during the first quarter of 2013.

Environmental Matters, Litigation and Contingencies

U. S. Steel has incurred and will continue to incur substantial capital, operating and maintenance, and remediation expenditures as a result of environmental laws and regulations. In recent years, these expenditures have been mainly for process changes in order to meet Clean Air Act (CAA) obligations and similar obligations in Europe and Canada, although ongoing compliance costs have also been significant. To the extent that these expenditures, as with all costs, are not ultimately reflected in the prices of our products and services, operating results will be reduced. U. S. Steel believes that our major North American and many European integrated steel competitors are confronted by substantially similar conditions and thus does not believe that our relative position with regard to such competitors is materially affected by the impact of environmental laws and regulations. However, the costs and operating restrictions necessary for compliance with environmental laws and regulations may have an adverse effect on our competitive position with regard to domestic mini-mills, some foreign steel producers (particularly in developing economies such as China) and producers of materials which compete with steel, all of which may not be required to incur equivalent costs in their operations. In addition, the specific impact on each competitor may vary depending on a number of factors, including the age and location of its operating facilities and its production methods. U. S. Steel is also responsible for remediation costs related to our prior disposal of environmentally sensitive materials. Many of our competitors do not have similar historical liabilities.

Our U.S. facilities are subject to the U.S. environmental standards, including the CAA, the Clean Water Act (CWA), the Resource Conservation and Recovery Act (RCRA) and the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), as well as state and local laws and regulations.

U. S. Steel Canada (USSC) is subject to the environmental laws of Canada, which are comparable to environmental standards in the United States. Environmental regulation in Canada is an area of shared responsibility between the federal government and the provincial governments, which in turn delegate certain matters to municipal governments. Federal environmental statutes include the federal Canadian Environmental Protection Act, 1999 and the Fisheries Act. Various provincial statutes regulate

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environmental matters such as the release and remediation of hazardous substances; waste storage, treatment and disposal; and releases to air and water. As in the United States, Canadian environmental laws (federal, provincial and local) are undergoing revision and becoming more stringent.

USSK is subject to the environmental laws of Slovakia and the European Union (EU). A related law of the EU commonly known as Registration, Evaluation, Authorization and Restriction of Chemicals, Regulation 1907/2006 (REACH) requires the registration of certain substances that are produced in the EU or imported into the EU. Although USSK is currently compliant with REACH, this regulation is becoming increasingly stringent. Slovakia is also currently considering a law implementing an EU Waste Framework Directive that would more strictly regulate waste disposal and increase fees for waste disposed of in landfills including privately owned landfills. The intent of the waste directive is to encourage recycling and because Slovakia has not adopted implementing legislation, we cannot estimate the full financial impact of this prospective legislation at this time.

The EU’s Industry Emission Directive will require implementation of EU determined best available techniques (BATs) to reduce environmental impacts as well as compliance with BAT associated emission levels. It contains operational requirements for air emissions, wastewater discharges, solid waste disposal and energy conservation, dictates certain operating practices and imposes stricter emission limits. Producers will be required to be in compliance with the iron and steel BAT by March 8, 2016. We are currently evaluating the costs of complying with BAT, but our most recent broad estimate of likely capital expenditures is $300 million to $400 million over the 2013 to 2016 period. We are currently investigating the possibility of obtaining EU grants to fund a portion of those capital expenditures. We also believe there will be increased operating costs, such as increased energy and maintenance costs, but we are currently unable to reliably estimate this amount.

A Memorandum of Understanding was signed in March of 2013 between U. S. Steel and the government of Slovakia. The Memorandum of Understanding outlines areas in which the government and U. S. Steel will work together to help create a more competitive environment and conditions for USSK. Some of the incentives the government of Slovakia agreed to provide, as an effort to reduce USSK’s cost structure, include participation in a renewable energy program that provides the opportunity to reduce electricity costs as well as the potential for government grants and other support concerning investments in environmental control technology that may be required under the recently implemented BAT requirements. The ultimate economic value of these actions is subject to many developments and uncertainties but based on current electricity tariffs, management estimates annual energy savings of approximately €15 million, which are expected to begin in 2016. There are many conditions and uncertainties regarding the grants, including matters controlled by the EU, but the value could be as much as €75 million. In return, U. S. Steel agreed to achieve employment level reduction goals at USSK only through the use of natural attrition, except in cases of extreme economic conditions, as outlined in the current Collective Labor Agreement. Additionally, U. S. Steel agreed to pay the government of Slovakia specified declining amounts should U. S. Steel sell USSK within five years of signing the Memorandum of Understanding.

U. S. Steel has incurred and will continue to incur substantial capital, operating and maintenance and remediation expenditures as a result of environmental laws and regulations, which in recent years have been mainly for process changes in order to meet CAA obligations and similar obligations in Europe and Canada. In the future, compliance with carbon dioxide (CO₂) emission requirements may include substantial costs for emission allowances, restriction of production and higher prices for coking coal, natural gas and electricity generated by carbon based systems. Since it is difficult to predict what requirements will ultimately be imposed in the United States, Canada and Europe, it is difficult to estimate the likely impact on U. S. Steel, but it could be substantial. To the extent these expenditures, as with all costs, are not ultimately reflected in the prices of U. S. Steel’s products and services,

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operating results will be reduced. U. S. Steel believes that our major North American and many European integrated steel competitors are confronted with substantially similar conditions and thus does not believe that its relative position with regard to such competitors will be materially affected by the impact of environmental laws and regulations. However, if the final requirements do not recognize the fact that the integrated steel process involves a series of chemical reactions involving carbon that create CO₂ emissions, our competitive position relative to mini mills will be adversely impacted. Our competitive position compared to producers in developing nations, such as China and India, will be harmed unless such nations require commensurate reductions in CO₂ emissions. Competing materials such as plastics may not be similarly impacted. The specific impact on each competitor may vary depending on a number of factors, including the age and location of its operating facilities and its production methods. U. S. Steel is also responsible for remediation costs related to former and present operating locations and disposal of environmentally sensitive materials. Many of our competitors, including North American producers, or their successors, that have been the subject of bankruptcy relief have no or substantially lower liabilities for such matters.

Greenhouse Gas Emissions Regulation

The current and potential regulation of greenhouse gas emissions remains a significant issue for the steel industry, particularly for integrated steel producers such as U. S. Steel. The regulation of greenhouse gases such as CO₂ emissions has either become law or is being considered by legislative bodies of many nations, including countries where we have operating facilities. In the United States, the Environmental Protection Agency (EPA) has published rules for regulating greenhouse gas emissions for certain facilities and has implemented various reporting requirements as further described below.

In Utility Air Regulatory Group v. EPA, No. 11-1037 (consolidating various challenges); and Texas v. EPA, No. 10-1425, the U.S. Court of Appeals for the District of Columbia issued an opinion essentially upholding the EPA’s greenhouse gas authority. The court rejected challenges to the endangerment finding, giving the EPA authority to regulate greenhouse gases under the CAA on the basis that they pose a risk to human health. The court also rejected arguments by petitioners to dismiss inclusion of greenhouse emissions under the tailpipe rule, giving the EPA the authority to regulate greenhouse gas emissions from mobile sources and triggering regulation for stationary sources. The court dismissed challenges to the timing and tailoring rules citing that it lacked jurisdiction to decide the case on its merits since none of the petitioners had legal standing to challenge the timing and tailoring rules. Finally, the court declined to decide challenges to other State Implementation Plan (SIP) related rules issued by the EPA regarding greenhouse gas, stating that it also lacked jurisdiction over these SIP related rules. The rules are being challenged in different tribunals.

The EU has established greenhouse gas regulations for the EU member states, while in Canada, a regulatory framework for greenhouse gas emissions has been published, details of which are discussed below. International negotiations to supplement and eventually replace the 1997 Kyoto Protocol are ongoing.

Since 2009, the federal government has committed to reducing Canada’s total greenhouse gas emissions by 17 percent from 2005 levels by 2020. The Ontario government has committed to its own greenhouse gas emission reduction targets for the province. This plan announced greenhouse gas emission reduction targets of six percent below 1990 levels by 2014, 15 percent below 1990 levels by 2020 and 80 percent below 1990 levels by 2050. The Ontario government is currently seeking input from stakeholders, including industry, on the development of a greenhouse gas emission reduction program for Ontario.

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If federal or provincial greenhouse gas reduction legislation for the steel sector becomes law in Canada, it could have economic and operational consequences for U. S. Steel. At the present time, it is not possible to estimate the timing or impact of these or other future government actions on U. S. Steel.

The EPA has classified greenhouse gases such as CO₂ as harmful gases. Under this premise, it has implemented a greenhouse gas emission monitoring and reporting requirement for all facilities emitting 25,000 metric tons or more per year of carbon dioxide, methane and nitrous oxide in CO₂ equivalent quantities. In accordance with EPA greenhouse gas emissions reporting requirements, reports for the year 2012 were completed and submitted for all required facilities by the April 1, 2013 deadline. As with previous year’s reporting, fourteen facilities submitted reports including Gary Works, East Chicago Tin, Midwest Plant, Clairton Plant, Edgar Thomson Plant, Irvin Plant, Fairless Plant, Fairfield Sheet, Fairfield Tubular, Granite City Works, Great Lakes Works, Lorain Tubular, Minntac and Keetac. The Texas Operations is the only significant operation not required to report as its emissions were well below the 25,000 ton reporting threshold.

New requirements were adopted in 2011 related to monitoring and reporting of greenhouse gas emissions for vacuum degassing (decarburization), and methane emissions from on-site landfills. Facilities for which greenhouse gas emissions from decarburization were determined and reported included Gary Works, Great Lakes Works, and the Edgar Thomson Plant. Calculation of landfill methane emissions from U. S. Steel facilities were completed earlier this year. New provisions for incorporating electronic reporting of on-site landfill methane emissions were added in 2012 enabling those subject to the rule to report greenhouse gas emissions from on-site landfills for 2011.

In 2013, the EPA significantly expanded its reporting requirements to include inputs to the calculation, primarily related to methane emissions from landfills, which had previously been deferred. This meant that in addition to the 2012 reports, the 2010 and 2011 reports also had to be re-submitted for many of our facilities. New requirements were also imposed for the monitoring and reporting of greenhouse gas emissions from industrial landfills, including reporting specific categories and historical quantities of materials sent to our on-site landfills.

As with previous year’s reports, the EPA intends to make this information publicly available from all facilities.

The European Commission (EC) has created an Emissions Trading System (ETS) and subsequent to 2012, the ETS will employ centralized allocation, rather than national allocation plans, that are expected to be more stringent than the previous requirements. The new ETS also includes a cap designed to achieve an overall reduction of greenhouse gases for the ETS sectors of 21 percent in 2020 compared to 2005 emissions and auctioning as the basic principle for allocating emissions allowances, with some transitional free allocation provided on the basis of benchmarks for manufacturing industries under risk of carbon leakage. Manufacturing of sinter, coke oven products, basic iron and steel, ferro-alloys and cast iron tubes have all been recognized as exposing companies to a significant risk of carbon leakage, but the new ETS is still expected to lead to additional costs for steel companies in Europe. Because the final scheme has not yet been published, we cannot reliably estimate the future market value of CO₂ emission allowances and the cost of complying with the new ETS at this time.

Environmental Remediation

In the United States, U. S. Steel has been notified that we are a potentially responsible party (PRP) at 22 sites under CERCLA as of March 31, 2013. In addition, there are 12 sites related to U. S. Steel where we have received information requests or other indications that we may be a PRP under CERCLA but where sufficient information is not presently available to confirm the existence of liability

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or make any judgment as to the amount thereof. There are also 38 additional sites related to U. S. Steel where remediation is being sought under other environmental statutes, both federal and state, or where private parties are seeking remediation through discussions or litigation. At many of these sites, U. S. Steel is one of a number of parties involved and the total cost of remediation, as well as U. S. Steel’s share thereof, is frequently dependent upon the outcome of investigations and remedial studies. U. S. Steel accrues for environmental remediation activities when the responsibility to remediate is probable and the amount of associated costs is reasonably determinable. As environmental remediation matters proceed toward ultimate resolution or as additional remediation obligations arise, charges in excess of those previously accrued may be required. See Note 20 to the Consolidated Financial Statements.

For discussion of relevant environmental items, see “Part II. Other Information—Item 1. Legal Proceedings—Environmental Proceedings.”

During the first quarter of 2013, there was no change in our accrual balance for environmental matters for U.S. and international facilities. The total accrual for such liabilities at March 31, 2013 was $203 million. These amounts exclude liabilities related to asset retirement obligations, disclosed in Note 14 to the Consolidated Financial Statements.

U. S. Steel is the subject of, or a party to, a number of pending or threatened legal actions, contingencies and commitments involving a variety of matters, including laws and regulations relating to the environment. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the financial statements. However, management believes that U. S. Steel will remain a viable and competitive enterprise even though it is possible these contingencies could be resolved unfavorably.

OUTLOOK

We expect total reportable segment and Other Businesses operating results to be near breakeven for the second quarter. Results for our Tubular segment are projected to be comparable with the first quarter; however we expect lower results from our Flat-rolled and European segments.

While we project North American flat-rolled market conditions for the second quarter to be comparable to the first quarter, we expect an operating loss for our Flat-rolled segment primarily due to higher operating costs. Operating costs are projected to increase due primarily to higher repairs and maintenance costs as well as higher natural gas costs offset by lower raw materials costs. Repairs and maintenance costs are projected to be $75 million higher in the second quarter due to maintenance projects already largely completed at Gary Works and Lake Erie Works. Average realized prices, including the effect of a more favorable product mix, are expected to be comparable to the first quarter while shipments are projected to decrease slightly. The labor agreement covering our Lake Erie Works expired on April 15, 2013 and a successor agreement has not been reached. U. S. Steel Canada implemented a lockout of represented employees effective April 28, 2013.

Second quarter results for our European segment are projected to decline compared to the first quarter due to higher raw materials costs, primarily iron ore. Shipments and average realized euro-based prices are expected to be comparable to the first quarter as decreases in spot market prices are expected to be offset by the positive effect of a higher volume of value-added shipments.

We expect second quarter results for our Tubular segment to be comparable to the first quarter. Shipments are expected to increase compared to the first quarter to support a higher level of drilling activity while average realized prices are projected to be slightly lower, mainly due to increased shipments of welded product. Operating costs are expected to decrease due to operating efficiencies related to higher production volumes.

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Operating profit from Other Businesses is expected to increase approximately $30 million due to a real estate sale expected to occur in the second quarter.

We expect a minimal tax provision/benefit in the second quarter primarily due to the full valuation allowance on deferred tax assets in Canada.

INTERNATIONAL TRADE

Demand for flat-rolled products is influenced by a wide variety of factors, including but not limited to macro-economic drivers, the supply-demand balance, inventories, imports and exports, currency fluctuations, and the demand from flat-rolled consuming markets. The largest drivers of North American consumption have historically been the automotive and construction markets, which make up more than 50 percent of total sheet consumption. Other sheet consuming industries include appliance, converter, container, tin, energy, electrical equipment, agricultural, domestic and commercial equipment and industrial machinery.

USSE conducts business primarily in Europe. Like our domestic operations, USSE is affected by the cyclical nature of demand for steel products and the sensitivity of that demand to worldwide general economic conditions. The sovereign debt issues and the resulting economic uncertainties are adversely affecting markets in the EU. We are subject to market conditions in those areas, which are influenced by many of the same factors that affect U.S. markets, as well as matters specific to international markets such as quotas, tariffs and other protectionist measures.

Demand for energy related tubular products depends on several factors, most notably the number of oil and natural gas wells being drilled, completed and re-worked, the depth and drilling conditions of these wells and the drilling techniques utilized. The level of these activities depends primarily on the demand for natural gas and oil and expectations about future prices for these commodities. Demand for our tubular products is also affected by the continuing development of shale oil and gas resources, the level of production by domestic manufacturers, inventories maintained by manufacturers, distributors, and end users and by the level of new capacity and imports in the markets we serve.

In recent years, a significant number of steel imports have been found to violate U.S. or Canadian trade laws. Under these laws, duties can be imposed against dumped products, which are products sold at a price that is below that producer’s sales price in its home market or at a price that is lower than its cost of production. Countervailing duties (CVD) can be imposed against products that benefited from foreign government financial assistance for the production, manufacture, or exportation of the product. For many years, U. S. Steel, other producers, customers and the United Steel Workers have sought the imposition of duties and in many cases have been successful. Such duties are generally subject to review every five years and we actively participate in such review proceedings. As in the past, U. S. Steel continues to monitor unfairly traded imports and is prepared to seek appropriate remedies against such imports.

The following international trade orders of interest to U. S. Steel are currently undergoing five-year (sunset) reviews in the United States: (i) an AD order on welded large-diameter line pipe from Japan; (ii) an AD order on hot-rolled steel from China; (iii) AD and CVD orders on hot-rolled steel from India; (iv) AD and CVD orders on hot-rolled steel from Indonesia; (v) an AD order on hot-rolled steel from Taiwan; (vi) AD and CVD orders on hot-rolled steel from Thailand; and (vii) an AD order on hot-rolled steel from Ukraine.

Steel sheet imports to the United States accounted for an estimated 15 percent of the U.S. steel sheet market in 2012 and 13 percent of the U.S. steel sheet market in 2011 and 2010. Increases in future levels of imported steel could reduce future market prices and demand levels for steel produced in our North American facilities.

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Imports of flat-rolled steel to Canada accounted for an estimated 34 percent of the Canadian market for flat-rolled steel products in 2012, 35 percent in 2011 and 40 percent in 2010.

Total imports of flat-rolled carbon steel products (excluding quarto plates and wide flats) to the 27 countries currently comprising the EU were 11 percent of the EU market in 2012, 17 percent of the EU market in 2011 and 14 percent in 2010. Increases in future levels of imported steel could reduce market prices and demand levels for steel produced by USSE.

Energy related tubular products imported into the United States accounted for an estimated 52 percent of the U.S. domestic market in 2012, 47 percent in 2011 and 46 percent in 2010. Increases in future levels of imported steel could reduce future market prices and demand levels for steel produced in our North American facilities.

We expect to continue to experience competition from imports and will continue to closely monitor imports of products in which we have an interest. Additional complaints may be filed if unfairly-traded imports adversely impact, or threaten to adversely impact, our financial results.

NEW ACCOUNTING STANDARDS

See Note 2 to the Consolidated Financial Statements in Part I Item 1 of this Form 10-Q.

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Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There were no material changes in U. S. Steel’s exposure to market risk from December 31, 2012.

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Item 4. CONTROLS AND PROCEDURES

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

U. S. Steel has evaluated the effectiveness of the design and operation of its disclosure controls and procedures as of March 31, 2013. These disclosure controls and procedures are the controls and other procedures that were designed to ensure that information required to be disclosed in reports that are filed with or submitted to the U.S. Securities and Exchange Commission is: (1) accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosures and (2) recorded, processed, summarized and reported within the time periods specified in applicable law and regulations. Based on this evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of March 31, 2013, U. S. Steel’s disclosure controls and procedures were effective.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

There have not been any changes in U. S. Steel’s internal control over financial reporting that occurred during the fiscal quarter covered by this quarterly report, which have materially affected, or are reasonably likely to materially affect, U. S. Steel’s internal control over financial reporting.

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UNITED STATES STEEL CORPORATION

SUPPLEMENTAL STATISTICS (Unaudited)

	Quarter Ended March 31,
(Dollars in millions)	2013			2012
SEGMENT INCOME (LOSS) FROM OPERATIONS:
Flat-rolled	$	(13	)	$	183
U. S. Steel Europe		38			(34	)(a)
Tubular		64			129
Total reportable segments		89			278
Other Businesses		5			17
Items not allocated to segments
Postretirement benefit expense		(56	)		(77	)
Net loss on sale of assets		—			(310	)
Property tax settlements		—			19
Total income (loss) from operations	$	38		$	(73	)
CAPITAL EXPENDITURES
Flat-rolled	$	96		$	181
U. S. Steel Europe		10			2
Tubular		8			4
Other Businesses		2			2
Total	$	116		$	189
OPERATING STATISTICS
Average realized price: ($/net ton) (b)
Flat-rolled	$	719		$	764
U. S. Steel Europe		718			749
USSK		718			756
Tubular		1,556			1,727
Steel Shipments: (b)(c)
Flat-rolled		4,018			4,092
U. S. Steel Europe		1,048			1,045
USSK		1,048			972
Tubular		428			529
Raw Steel Production: (b)
Flat-rolled		4,920			5,043
U. S. Steel Europe		1,203			1,240
USSK		1,203			1,152
Raw Steel Capability Utilization: (d)
Flat-rolled		82	%		83	%
U. S. Steel Europe		98	%		85	%
USSK		98	%		92	%

^(a)  Includes a loss from operations for USSK of ($17) million for the quarter ended March 31, 2012.

^(b) Excludes intersegment transfers.

^(c) Thousands of net tons.

^(d)  Based on annual raw steel production capability of 24.3 million net tons for Flat-rolled and 5.0 million net tons for USSE. Prior to the sale of USSS on January 31, 2012, annual raw steel production capability for USSE was 7.4 million tons.

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PART II. OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS

GENERAL LITIGATION

In a series of lawsuits filed in federal court in the Northern District of Illinois beginning September 12, 2008, individual direct or indirect buyers of steel products have asserted that eight steel manufacturers, including U. S. Steel, conspired in violation of antitrust laws to restrict the domestic production of raw steel and thereby to fix, raise, maintain or stabilize the price of steel products in the United States. The cases are filed as class actions and claim treble damages for the period 2005 to present, but do not allege any damage amounts. U. S. Steel will vigorously defend these lawsuits and does not believe that it is probable a liability regarding these matters has been incurred. We are unable to estimate a range of possible loss at this time.

ENVIRONMENTAL PROCEEDINGS

Gary Works

On March 4, 2010 the EPA notified U. S. Steel that the requirements of the January 26, 1998 CWA consent decree in United States of America v. USX (Northern District of Indiana) had been satisfied. A joint motion to terminate the CWA consent decree was granted by the court on June 25, 2012, thereby terminating the consent decree in its entirety. As of March 31, 2013, project costs have amounted to $60.7 million. In 1998, U. S. Steel also entered into an additional consent decree with the public trustees, which resolves liability for natural resource damages on the same section of the Grand Calumet River. Work continues to complete and terminate the Natural Resource Damages order. U. S. Steel has released the $1 million payment to the public trustee for ecological monitoring. In addition, U. S. Steel is obligated to perform, and has completed the ecological restoration in this section of the Grand Calumet River. In total, the accrued liability for the above projects based on the estimated remaining costs was approximately $646,000 at March 31, 2013.

At Gary Works, U. S. Steel has agreed to close three hazardous waste disposal sites: D5, along with an adjacent solid waste disposal unit, Terminal Treatment Plant (TTP) Area; T2; and D2 combined with a portion of the Refuse Area, where a solid waste disposal unit overlaps with the hazardous waste disposal unit. The sites are located on plant property. The Indiana Department of Environmental Management (IDEM) has approved the closure plans for all three sites. U. S. Steel continues technical discussions with IDEM though on the conditions of the D2 approval. Closure is complete at D5, TTP and T2, with IDEM approval of the closure certification reports on February 1, 2012 (D5), April 3, 2012 (TTP) and November 1, 2012 (T2). As of March 31, 2013, the accrued liability for estimated costs to close these sites is approximately $15 million.

On October 23, 1998, EPA issued a final Administrative Order on Consent (Order) addressing Corrective Action for Solid Waste Management Units (SWMU) throughout Gary Works. This Order requires U. S. Steel to perform a RCRA Facility Investigation (RFI), a Corrective Measure Study (CMS) and Corrective Measure Implementation at Gary Works. Reports of field investigation findings for Phase I work plans have been submitted to the EPA. Through March 31, 2013, U. S. Steel had spent $44.6 million for corrective action studies, Vessel Slip Turning Basin interim measures and other corrective actions. U. S. Steel has completed the second year of a facility wide perimeter groundwater monitoring program and will be submitting a report with recommendations for future continuation of the program while also undertaking additional localized focused groundwater assessment work recently approved by the EPA. U. S. Steel has also submitted and partially completed a Baseline Ecological Risk Assessment work plan for addressing sediments behind the East Breakwall. In addition, U. S. Steel has received approval from the EPA to proceed with an interim stabilization measure to address certain components of the East Side Groundwater Solid Waste Management Area as required

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by the Order. Until the remaining Phase I work and Phase II field investigations are completed, it is not possible to assess what additional expenditures will be necessary for Corrective Action projects at Gary Works. In total, the accrued liability for projects is approximately $43 million as of March 31, 2013, based on the estimated remaining costs.

Mon Valley Works

On March 17, 2008, U. S. Steel entered a Consent Order and Agreement (COA) with the Allegheny County Health Department (ACHD) to resolve alleged opacity limitation and pushing and traveling violations from older coke oven batteries at its Clairton Plant and to resolve alleged opacity violations from its Edgar Thomson Plant. Under the COA, U. S. Steel paid a civil penalty of $301,800 on March 25, 2008. The COA requires U. S. Steel to conduct interim repairs on existing batteries and make improvements at the Ladle Metallurgical Facility and Steelmaking Shop at the Edgar Thomson Plant. The COA also required that Batteries 1, 2 and 3 be shutdown by August 11, 2015. On September 30, 2010, U. S. Steel and ACHD amended the COA to require U. S. Steel to install two new Low Emissions Quench Towers to replace existing towers and bring Batteries 1, 2 and 3 into compliance rather than shutting them down. We are repairing existing Batteries 19 and 20 and we continue to make improvements on Batteries 1, 2 and 3. Total costs for the quench towers are estimated to be approximately $68 million while the cost of improvements at Batteries 1, 2 and 3 cannot be estimated at this time. U. S. Steel is also completing upgrades at its Edgar Thomson Plant that would reduce emissions. U. S. Steel shut down Batteries 7, 8 and 9 in 2009 as required by the COA.

On October 8, 2009, Mon Valley Clairton Plant received an Notice of Violation (NOV) from ACHD alleging that the Clairton Plant was culpable for hydrogen sulfide (H₂S) Pennsylvania ambient air quality standard exceedances. The NOV requires U. S. Steel to submit a plan with milestones to reduce and minimize fugitive emissions of coke oven gas from the coke producing operations at Clairton including identification of coke oven gas emission sources and method of improved emission prevention and control. While U. S. Steel appealed the NOV on October 16, 2009, U. S. Steel submitted an Action Plan to ACHD that was required by the NOV. U. S. Steel and ACHD have performed H₂S modeling and are in the process of evaluating all potential sources of H₂S in the area. U. S. Steel and ACHD continue to meet and discuss resolution.

Midwest Plant

A former disposal area located on the east side of the Midwest Plant was designated a SWMU (East Side SWMU) by IDEM before U. S. Steel acquired this plant from National Steel Corporation. U. S. Steel submitted a Closure Plan to IDEM recommending consolidation and “in-place” closure of the East Side SWMU. IDEM approved the Closure Plan in January 2010. Implementation of the Closure Plan began during the third quarter of 2010 and fieldwork was completed early in the second quarter of 2011. A full vegetative cover over the project area is in place and the Closure Completion Report was approved by IDEM on November 21, 2011. As of March 31, 2013, $4.3 million has been spent on the project. The remaining cost is estimated to be $117,000 for post construction monitoring work and was recorded as an accrued liability as of March 31, 2013.

Fairless Plant

In January 1992, U. S. Steel commenced negotiations with the EPA regarding the terms of an Administrative Order on consent, pursuant to RCRA, under which U. S. Steel would perform an RFI and a CMS at our Fairless Plant. A Phase I RFI report was submitted during the third quarter of 1997. The cost to U. S. Steel to continue to maintain the interim measures, develop a Phase II/III RFI Work Plan and implement certain corrective measures is estimated to be $735,000. It is reasonably possible

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that additional costs of as much as $25 million to $45 million may be incurred at this site in combination with four other projects. See Note 20 to the Consolidated Financial Statements “Contingencies and Commitments – Environmental Matters – Remediation Projects – Projects with Ongoing Study and Scope Development.”

Fairfield Works

A consent decree was signed by U. S. Steel, the EPA and the U.S. Department of Justice (DOJ) and filed with the United States District Court for the Northern District of Alabama (United States of America v. USX Corporation) on December 11, 1997. In accordance with the consent decree, U. S. Steel initiated a RCRA corrective action program at the Fairfield Works facility. The Alabama Department of Environmental Management (ADEM) with the approval of the EPA assumed primary responsibility for regulation and oversight of the RCRA corrective action program at Fairfield Works. The Phase I RFI for waste disposed of at the Exum Materials Management Area was voluntarily implemented in October 2011, completed in December 2011 with the final completion report submitted to ADEM in June 2012. A Phase II RFI for the Fairfield Facility property was completed in December 2012 with the completion report scheduled for submittal to ADEM in the second quarter of 2013. In total, the accrued liability for remaining work under the Corrective Action Program including the former Ensley facility was $361,000 at March 31, 2013, based on estimated remaining costs. It is reasonably possible that additional costs of as much as $25 million to $45 million may be incurred at this site in combination with four other projects. See Note 20 to the Consolidated Financial Statements “Contingencies and Commitments – Environmental Matters – Remediation Projects – Projects with Ongoing Study and Scope Development.”

Lorain Tubular Operations

In September 2006, U. S. Steel received a letter from the Ohio Environmental Protection Agency (OEPA) inviting U. S. Steel to enter into discussions about RCRA Corrective Action at Lorain Tubular Operations. A Phase I RFI on the identified SWMUs and Area of Contamination was submitted in March 2012 and a Phase II workplan that addresses additional soil investigations, site wide groundwater and the pipe mill lagoon was submitted and approved by the OEPA. As of March 31, 2013, U. S. Steel has spent $831,000 on studies at this site. Costs to complete additional projects are estimated to be $409,000. It is reasonably possible that additional costs of as much as $25 million to $45 million may be incurred at this site in combination with four other projects. See Note 20 to the Consolidated Financial Statements “Contingencies and Commitments – Environmental Matters – Remediation Projects – Projects with Ongoing Study and Scope Development.”

Construction and start-up of a seep collection system at the D2 landfill was completed in the third and fourth quarters of 2011. The system was required by OEPA as part of a revised Post-Closure Care Plan for the landfill. Based on subsequent system influent and effluent water quality data, additional seep water treatment will be necessary to meet future permit limits. A permit to install was submitted to, and approved by the OEPA during the fourth quarter that permits installation of the new equipment. As of March 31, 2013, project costs have amounted to $1.4 million. The remaining cost of the project is expected to be $315,000 and was recorded as an accrued liability as of March 31, 2013.

Great Lakes Works

On February 13, 2007, Michigan Department of Environmental Quality (MDEQ) and U. S. Steel agreed to an Administrative Consent Order (the Order) that resolves alleged violations of CWA National Pollutant Discharge Elimination System permits at the Great Lakes Works facility. As required by the Order, U. S. Steel has paid a civil penalty of $300,000 and has reimbursed MDEQ $50,000 in costs. The Order identified certain compliance actions to address the alleged violations. U. S. Steel has

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completed work on most of these compliance actions, and has initiated work on the others. As of March 31, 2013, $1.8 million has been spent on the project. In addition, $161,000 remains accrued for possible additional requirements.

On April 20,2011, U. S. Steel Great Lakes Works received an NOV from MDEQ regarding an alleged Basic Oxygen Process (BOP) roof monitor opacity violation that was to have occurred on April 14, 2011. On May 11, 2011, U. S. Steel responded to the NOV stating that the alleged exceedance was caused by a desulfurization lance failure and that it has implemented corrective actions to prevent its recurrence.

On May 10, 2011, the MDEQ issued a violation notice alleging that fallout from a bleeder incident on April 20, 2011 caused an unreasonable interference with the comfortable enjoyment of life and property in Windsor, Canada. U. S. Steel responded to the notice to MDEQ.

On October 10, 2012, the MDEQ issued a violation notice alleging the No. 2 baghouse at the No. 2 BOP exceeded applicable emission limits based upon stack testing conducted earlier in 2012. On October 31, 2012, U. S. Steel responded to the notice indicating that corrective actions at the baghouse have been employed and stack tests conducted after the repairs were made to demonstrate the stack complies with emission limits.

Granite City Works

U. S. Steel received two NOVs, dated February 20, 2004 and March 25, 2004, for air violations at the coke batteries, the blast furnace and the steel shop at our Granite City Works facility. All of the issues have been resolved except for an issue relating to air emissions that occurs when coke is pushed out of the ovens, for which a compliance plan has been submitted to the Illinois Environmental Protection Agency (IEPA). On December 18, 2007, U. S. Steel and IEPA entered into a consent order (the Order) (State of Illinois ex. rel. Lisa Madigan vs. United States Steel Corporation), which resolved the issues raised in the two NOVs. The Order required that U. S. Steel: (1) pay a penalty of $300,000, which U. S. Steel paid on January 10, 2008; (2) demonstrate compliance with Coke Oven Pushing Operations in accordance with the compliance schedule provided in the Order; (3) comply with the basic oxygen furnace (BOF) opacity emissions in accordance with the schedule provided in the Order; and (4) submit to the IEPA a revised permit application with the correct sulfur dioxide emission factors. In February 2011, U. S. Steel demonstrated compliance with the applicable requirements and in March 2011, U. S. Steel certified compliance with the applicable regulations. U. S. Steel continues to negotiate permit modifications to address the blast furnace gas sulfur dioxide emission factor as required by the Order.

On July 1, 2010, U. S. Steel entered into a Memorandum of Understanding (MOU) with the IEPA that requires Granite City Works to achieve reductions in emissions of particulate matter. U. S. Steel will evaluate and install appropriate controls to achieve this purpose. To complete the obligations pursuant to the MOU, U. S. Steel anticipates incurring expenditures of approximately $55 million to install additional pollution controls at the BOF.

To comply with the Illinois State NOx RACT rule, U. S. Steel will install Flue Gas Recirculation and Continuous Emission Monitors on Boilers 11 and 12 at Granite City Works with expenditures of approximately $4 million. U. S. Steel will also install a NOx continuous emissions monitor for the slab reheat furnaces with expenditures of approximately $1 million.

On November 30, 2012, the IEPA issued a Violation Notice alleging violations of emission standards from the facility’s BOF. In the notice, the IEPA also alleged the facility failed to comply with associated CAA regulations and the facility did not use steam rings at the BOP as required by the facility’s

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Title V permit. U. S. Steel met with the IEPA on February 6, 2013 and provided a written response to the IEPA on February 27, 2013. To date, the IEPA has not responded to the U. S. Steel correspondence nor has any penalty been demanded.

Minnesota Ore Operations

On February 6, 2013, the EPA published a Federal Implementation Plan (FIP) that applies to taconite facilities in Minnesota. The FIP establishes and requires the use of low NOx burners on indurating furnaces as Best Available Retrofit Technology. While U. S. Steel has already installed low NOx burners on Minntac Lines 6 and 7 and is currently obligated to install low NOx burners on Lines 3, 4, and 5 pursuant to existing agreements and permits, the rule would require the installation of low NOx burners for the existing line at Keetac for which U. S. Steel did not have an otherwise existing obligation. U. S. Steel estimates the expenditures associated with the installation of low NOx burners are approximately $20 million.

On March 2, 2012, U. S. Steel’s Keetac facility received an NOV from the Minnesota Pollution Control Agency (MPCA) for alleged violations of the Minnesota Fugitive Dust Rule. U. S. Steel responded to the notice on March 30, 2012 in which it respectfully contested the allegations provided in the notice.

U. S. Steel and the MPCA reached agreement on a Schedule of Compliance (SOC) to reduce air emissions at the Minntac and Keetac facilities and to address alleged water quality issues at the Minntac facility. The SOC incorporates the Keetac Expansion Mercury Agreement associated with the MPCA’s mercury Total Maximum Daily Load requirements and Minntac’s Title V NOx reduction requirements. A dry control system will be installed at the Minntac facility to reduce PM, PM₁₀, PM_2.5, SO2, and mercury emissions. Parts of the SOC became effective on June 9, 2011, while other parts became effective on October 19, 2011. U. S. Steel expects expenditures of approximately $220 million to install dry waste gas controls at Minntac.

On January 20, 2013, U. S. Steel’s Keetac facility received an Alleged Violations Letter (AVL) from MPCA alleging a violation of Minnesota rules during a wind and fugitive dust event on the Keetac Taconite tailings basin in December 2012. In February 2013, U. S. Steel responded to the AVL indicating that no violation occurred; and also explained the actions taken by Keetac during the December wind event to minimize emissions. To date, no response from the MPCA has been received nor has any penalty been assessed.

Geneva Works

At U. S. Steel’s former Geneva Works, liability for environmental remediation, including the closure of three hazardous waste impoundments and facility-wide corrective action, has been allocated between U. S. Steel and the current property owner pursuant to an agreement and a permit issued by the Utah Department of Environmental Quality. As of March 31, 2013, U. S. Steel has spent $17.8 million to complete remediation on certain areas of the site. Having completed the investigation on a majority of the remaining areas identified in the permit, U. S. Steel has determined that the most effective means to address the remaining impacted material is to manage those materials in a previously approved on-site Corrective Action Management Unit. U. S. Steel has an accrued liability of $65 million as of March 31, 2013, for our estimated share of the remaining costs of remediation.

Duluth Works

The former U. S. Steel Duluth Works site was placed on the National Priorities List under CERCLA in 1983 and on the State of Minnesota’s Superfund list in 1984. Liability for environmental remediation at the site is governed by a Response Order by Consent executed with the MPCA in 1985 and a Record of Decision signed by MPCA in 1989. As of March 31, 2013, U. S. Steel has spent $21.6 million to

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complete remediation on certain areas of the site. Current activity at the site is focused on completing the feasibility study and remedial design of the two St. Louis River Estuary Operable Units (OUs) along with completing a feasibility study on several Upland OUs, as defined during the latest 5-year review of the site, conducted by the MPCA in 2008. The remaining cost of the project is estimated to be $21 million and was recorded as an accrued liability as of March 31, 2013.

Municipal Industrial Disposal Company (MIDC)

MIDC was a licensed disposal facility where U. S. Steel disposed coal tar and other wastes. The site was mismanaged by the operator and subsequently on August 30, 2002, U. S. Steel entered into a COA with the Pennsylvania Department of Environmental Protection to address the environmental issues at the site. While U. S. Steel was not the only entity to use the facility, U. S. Steel is the single remaining viable company responsible for the cleanup. An engineered remedy for the three locations at the site requiring remediation was implemented in July 2011 and completed in December 2011. The final completion report was submitted to the agency in December 2012. As of March 31, 2013, U. S. Steel has spent $12 million related to the project. The remaining cost of the project is estimated to be $181,000 and was recorded as an accrued liability as of March 31, 2013.

USS-POSCO Industries (UPI)

At UPI, a joint venture between subsidiaries of U. S. Steel and POSCO, corrective measures have been implemented for the majority of the former SWMUs. Prior to the formation of UPI, U. S. Steel owned and operated the Pittsburg, California facility and retained responsibility for the existing environmental conditions. Seven SWMUs remain at the facility. Based on their constituents, six of these SWMUs have been combined into two groups of three, while one SWMU remains a single entity. Investigation of the single SWMU is complete and an engineered remedy is in development for submission to the Department of Toxic Substances Control (DTSC). Investigation for the second SWMU group is also complete with recommendations, limited to future monitoring only, currently under review by the California DTSC. Investigations continue for the remaining SWMU group and it is likely that corrective measures will be required, but it is not possible at this time to define a scope or estimate costs for what may be required by the DTSC. As of March 31, 2013, $1 million remains for ongoing environmental studies and investigations. It is reasonably possible that additional costs of as much as $25 million to $45 million may be incurred at this site in combination with four other projects. See Note 20 to the Consolidated Financial Statements “Contingencies and Commitments – Environmental Matters – Remediation Projects – Projects with Ongoing Study and Scope Development.”

EPA Region V Federal Lawsuit

On August 1, 2012, the U.S. government, joined by the States of Illinois, Indiana and Michigan, filed a complaint in the Northern District of Indiana alleging various CAA and State air regulatory violations that were to have allegedly occurred at Gary Works, Granite City Works, and Great Lakes Works, our three integrated iron and steel facilities located in the EPA’s Region V. The Complaint alleges that Gary Works failed to obtain the proper pre-construction permit for a routine reline of its Blast Furnace No. 4 in 1990, and that the three facilities failed to meet certain operational, maintenance, opacity, and recordkeeping requirements under the CAA and its implementing regulations. The Complaint requests relief in the form of statutory penalties for each violation and for injunctive relief. U. S. Steel believes that the claims asserted in the complaint are not justified and are without statutory foundation. On September 21, 2012, U. S. Steel filed a motion to dismiss the U.S. government’s claims for relief regarding the 1990 reline of the Gary Blast Furnace No. 4 and filed an answer to the remaining allegations in the Complaint. On January 24, 2013, the Court heard oral arguments regarding the motion to dismiss. The motion is still pending before the Court. U. S. Steel will continue to vigorously defend against these claims. At this time, the potential outcome is not reasonably estimable.

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Other

In April 2003, U. S. Steel and Salomon Smith Barney Holdings, Inc. (SSB) entered into a consent order with the Kansas Department of Health & Environment (KDHE) concerning a former zinc smelting operation in Cherryvale, Kansas. Remediation was essentially completed in 2007 and U. S. Steel and SSB continue to work with KDHE to address the remaining issues. As such, the Consent Order is being renegotiated to investigate potential contamination beyond the boundary of the former zinc smelting operation. An amended Consent Order is expected to be approved by KDHE in the second quarter of 2013. At March 31, 2013, an accrual of $264,000 remains available for addressing these outstanding issues.

On January 18, 2011, KDHE signed a Consent Agreement and Final Order (CAFO), which obligates U. S. Steel to prepare and implement a corrective action plan for two sites in Girard, Kansas. The sites are referred to as the Girard Zinc Works and the Cherokee Lanyon #2 site. The CAFO recognizes a single project incorporating the corrective action for both sites. An addendum to the May 2012 Final Corrective Action Completion Report summarizing completion of fieldwork was submitted to KDHE on March 18, 2013 and subsequently approved by KDHE on March 22, 2013. U. S. Steel is currently working with KDHE in developing a long term care agreement to address post closure items for the site. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $71,000.

In January of 2004, U. S. Steel received notice of a claim from the Texas Commission on Environmental Quality (TCEQ) and notice of claims from citizens of a cap failure at the Dayton Landfill. U. S. Steel’s allocated share is approximately 16 percent. The Remedial Action Plan for the site was approved by TCEQ in June 2009. Implementation of remedial measures was initiated in July 2010 and all fieldwork was completed in November 2011. On March 18, 2013, TCEQ approved the Response Action Completion Report. The accrued liability for U. S. Steel’s share to implement the post-closure monitoring program was $774,000 as of March 31, 2013.

In May 2010, MPCA notified Canadian National Railroad Company (CN) of apparent environmental impacts on their property adjacent to the former U. S. Steel Duluth Works. U. S. Steel subsequently obtained information indicating U. S. Steel’s connection to the site as well as reviewed a site investigation report that CN prepared and submitted to MPCA in August 2011. On December 6, 2011, U. S. Steel agreed to purchase the site and to take responsibility for addressing the identified environmental impacts. The property transaction was closed on June 26, 2012. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $2 million.

The Canadian and Ontario governments have identified for remediation a sediment deposit, commonly referred to as Randle Reef, in Hamilton Harbor near USSC’s Hamilton Works, for which the regulatory agencies estimate expenditures with a net present value of approximately C$120 million (approximately $118 million). The national and provincial governments have each allocated C$40 million (approximately $39 million) for this project. Local sources, including industry, have also agreed to provide funding of C$40 million (approximately $39 million) for the project. USSC has committed to contribute approximately 11,000 tons of hot rolled steel and to fund C$2 million (approximately $2 million). The steel contribution is expected to be made in 2014. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $10 million reflecting the contribution commitment.

U. S. Steel is identified as a PRP at the former Breslube-Penn operating site, an oil recycling and solvent recovery operation located in Coraopolis, PA. U. S. Steel’s allocated share of the cost among the participating PRPs is approximately 29 percent. A Record of Decision was issued by the EPA in

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August 2007 and a Remedial Design was preliminarily approved in 2011 and is still under review by the agencies. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $2 million reflecting U. S. Steel’s share of the cost to implement remedial measures at the site.

ASBESTOS LITIGATION

At March 31, 2013, U. S. Steel was a defendant in approximately 780 active cases involving approximately 3,320 plaintiffs. As of December 31, 2012, U. S. Steel was a defendant in approximately 790 active cases involving approximately 3,330 plaintiffs. For the period ended March 31, 2013, settlements and dismissals resulted in the disposition of approximately 75 claims and U. S. Steel paid approximately $1 million in settlements. New filings added approximately 65 claims.

About 2,560, or approximately 77 percent, of these claims are currently pending in jurisdictions which permit filings with massive numbers of plaintiffs. Based upon U. S. Steel’s experience in such cases, it believes the actual number of plaintiffs who ultimately assert claims against U. S. Steel will likely be a small fraction of the total number of plaintiffs. Most of the claims filed in recent years involve individual or small groups of claimants.

Historically, these claims against U. S. Steel fall into three major groups: (1) claims made by persons who allegedly were exposed to asbestos at U. S. Steel facilities (referred to as “premises claims”); (2) claims made by industrial workers allegedly exposed to products formerly manufactured by U. S. Steel; and (3) claims made under certain federal and general maritime laws by employees of former operations of U. S. Steel. The ultimate outcome of any claim depends upon a myriad of legal and factual issues, including whether the plaintiff can prove actual disease, if any; actual exposure, if any, to U. S. Steel products; the duration of exposure to asbestos, if any, on U. S. Steel’s premises and the plaintiff’s exposure to other sources of asbestos. In general, the only insurance available to U. S. Steel with respect to asbestos claims is excess casualty insurance, which has multi-million dollar self-insured retentions. To date, U. S. Steel has received minimal payments under these policies relating to asbestos claims.

These asbestos cases allege a variety of respiratory and other diseases based on alleged exposure to asbestos. U. S. Steel is currently a defendant in cases in which a total of approximately 265 plaintiffs allege that they are suffering from mesothelioma. The potential for damages against defendants may be greater in cases in which the plaintiffs can prove mesothelioma.

In many cases in which claims have been asserted against U. S. Steel, the plaintiffs have been unable to establish any causal relationship to U. S. Steel or our products or premises; however, with the decline in mass plaintiff cases, the incidence of claimants actually alleging a claim against U. S. Steel is increasing. In addition, in many asbestos cases, the plaintiffs have been unable to demonstrate they have suffered any identifiable injury or compensable loss at all; that any injuries they have incurred did in fact result from alleged exposure to asbestos; or that such alleged exposure was in any way related to U. S. Steel or our products or premises.

In every asbestos case in which U. S. Steel is named as a party, the complaints are filed against numerous named defendants and generally do not contain allegations regarding specific monetary damages sought. To the extent that any specific amount of damages is sought, the amount applies to claims against all named defendants and in no case is there any allegation of monetary damages against U. S. Steel. Historically, approximately 89 percent of the cases against U. S. Steel did not specify any damage amount or stated that the damages sought exceeded the amount required to establish jurisdiction of the court in which the case was filed. (Jurisdictional amounts generally range from $25,000 to $75,000). U. S. Steel does not consider the amount of damages alleged, if any, in a complaint to be relevant in assessing our potential exposure to asbestos liabilities.

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U. S. Steel aggressively pursues grounds for the dismissal of U. S. Steel from pending cases and litigates cases to verdict where we believe litigation is appropriate. U. S. Steel also makes efforts to settle appropriate cases, especially mesothelioma cases, for reasonable, and frequently nominal, amounts.

The following table shows activity with respect to asbestos litigation:

Period ended	Opening Number of Claims		Claims Dismissed, Settled and Resolved		New Claims		Closing Number of Claims		Amounts Paid to Resolve Claims (in millions)
December 31, 2010		3,040		200		250		3,090	$	8
December 31, 2011		3,090		130		275		3,235	$	8
December 31, 2012		3,235		190		285		3,330	$	15
March 31, 2013		3,330		75		65		3,320	$	1

The amount U. S. Steel has accrued for pending asbestos claims is not material to U. S. Steel’s financial position. U. S. Steel does not accrue for unasserted asbestos claims because it is not possible to determine whether any loss is probable with respect to such claims or even to estimate the amount or range of any possible losses. The vast majority of pending claims against us allege so-called “premises” liability-based exposure on U. S. Steel’s current or former premises. These claims may be made by an indeterminable number of people such as truck drivers, railroad workers, salespersons, contractors and their employees, government inspectors, customers, visitors and even trespassers. In most cases, the claimant also was exposed to asbestos in non-U. S. Steel settings; the relative periods of exposure between U. S. Steel and non-U. S. Steel settings vary with each claimant; and the strength or weakness of the causal link between U. S. Steel exposure and any injury vary widely as do the nature and severity of the injury claimed.

We are unable to estimate the ultimate outcome of asbestos-related lawsuits, claims and proceedings due to the unpredictable nature of personal injury litigation. Despite this uncertainty, management believes that the ultimate resolution of these matters will not have a material adverse effect on the Company’s financial condition, although the resolution of such matters could significantly impact results of operations for a particular period. Among the factors considered in reaching this conclusion are: (1) it has been many years since U. S. Steel employed maritime workers or manufactured or sold asbestos containing products; (2) most asbestos containing material was removed or remediated at U. S. Steel facilities many years ago and (3) U. S. Steel’s history of trial outcomes, settlements and dismissals.

The foregoing statements of belief are forward-looking statements. Predictions as to the outcome of pending litigation are subject to substantial uncertainties with respect to (among other things) factual and judicial determinations, and actual results could differ materially from those expressed in these forward-looking statements.

Item 4. MINE SAFETY DISCLOSURES

The information concerning mine safety violations and other regulatory matters required by Section 150 of the Dodd-Frank Wall Street Reform Act (the Act) and Item 104 of Regulation S-K is included in Exhibit 95 to this Form 10-Q.

Item 5. OTHER INFORMATION

(a) On March 5, 2013, U. S. Steel received an Imminent Danger Order under Section 107(a) of the Federal Mine Safety and Health Act of 1977 (30 U.S.C. 817(a)) from the Mine Safety and Health Administration of the Department of Labor (“MSHA”) in connection with its operation of the Minntac Mine in Mt. Iron, Minnesota (Mine ID: 21-00282). The Order was vacated by MSHA on March 21, 2013.

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Item 6. EXHIBITS

4.1	Sixth Supplemental Indenture dated as of March 26, 2013 between United States Steel Corporation and The Bank of New York Mellon, formerly known as The Bank of New York, regarding 6.875% Senior Notes due April 1, 2021. Incorporated by reference to Exhibit 4.1 to United States Steel Corporation’s Form 8-K filed on March 27, 2013, Commission File Number 1-16811.
4.2	Seventh Supplemental Indenture dated as of March 26, 2013 between United States Steel Corporation and The Bank of New York Mellon, formerly known as The Bank of New York, regarding 2.75% Senior Convertible Notes due April 1, 2019. Incorporated by reference to Exhibit 4.2 to United States Steel Corporation’s Form 8-K filed on March 27, 2013, Commission File Number 1-16811.
10.1	Base Salaries of Named Executive Officers.
31.1	Certification of Chief Executive Officer required by Rules 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as promulgated by the Securities and Exchange Commission pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer required by Rules 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as promulgated by the Securities and Exchange Commission pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of 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 of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
95	Mine Safety Disclosure required under Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act.
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

- 56 -

SIGNATURE

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 chief accounting officer thereunto duly authorized.

UNITED STATES STEEL CORPORATION
By	/s/ Gregory A. Zovko
	Gregory A. Zovko
	Vice President and Controller

April 30, 2013

WEB SITE POSTING

This Form 10-Q will be posted on the U. S. Steel web site, www.ussteel.com, within a few days of its filing.

- 57 -

EX-10.1

Exhibit 10.1

BASE SALARIES OF, AND OTHER ARRANGEMENTS WITH,

NAMED EXECUTIVE OFFICERS

On April 29, 2013, the Compensation & Organization Committee of the Board of Directors approved the annual base salaries for executive management effective May 1, 2013. There was no increase in the base salary for Mr. Surma, the Chief Executive Officer, or any other named executive officer except for Mr. Garraux. Effective May 1, 2013, the base salaries for the named executive officers are as follows:

J. P. Surma	$	1,260,000
M. Longhi	$	820,000
G. R. Haggerty	$	621,180
J. D. Garraux	$	599,872
D. H. Lohr	$	550,800

The named executive officers listed above are also provided the following perquisites: limited personal use of corporate aircraft and automobiles; dining privileges; club memberships; financial planning and tax preparation services; parking expenses; company-paid physicals; limited personal use of corporate properties; use of sports and entertainment tickets; matching contributions to charities; relocation expenses; and, in the case of executives on foreign assignment, foreign service premiums, the services of a driver, security, housing and utility benefits, foreign service cost of living adjustment and allowances for communications and home leave. Additionally, there are tax gross ups and reimbursements associated with foreign service.

EX-31.1

Exhibit 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, John P. Surma, certify that:

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

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this 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 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 15d-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 report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control 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 report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this 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 fiscal 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 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.

April 30, 2013	/s/ John P. Surma
	John P. Surma
	Chairman of the Board of Directors
	and Chief Executive Officer

EX-31.2

Exhibit 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, Gretchen R. Haggerty, certify that:

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

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this 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 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 15d-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 report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control 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 report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this 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 fiscal 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 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.

April 30, 2013	/s/ Gretchen R. Haggerty
	Gretchen R. Haggerty
	Executive Vice President
	and Chief Financial Officer

EX-32.1

Exhibit 32.1

CHIEF EXECUTIVE OFFICER

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

I, John P. Surma, Chairman of the Board of Directors and Chief Executive Officer of United States Steel Corporation, certify that:

(1) The Quarterly Report on Form 10-Q of United States Steel Corporation for the period ending March 31, 2013, 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 foregoing report fairly presents, in all material respects, the financial condition and results of operations of United States Steel Corporation.

/s/ John P. Surma

 John P. Surma

 Chairman of the Board of Directors

 and Chief Executive Officer

April 30, 2013

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to United States Steel Corporation and will be retained by United States Steel Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CHIEF FINANCIAL OFFICER

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

I, Gretchen R. Haggerty, Executive Vice President and Chief Financial Officer of United States Steel Corporation, certify that:

(1) The Quarterly Report on Form 10-Q of United States Steel Corporation for the period ending March 31, 2013, 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 foregoing report fairly presents, in all material respects, the financial condition and results of operations of United States Steel Corporation.

/s/ Gretchen R. Haggerty

 Gretchen R. Haggerty

 Executive Vice President

 and Chief Financial Officer

April 30, 2013

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to United States Steel Corporation and will be retained by United States Steel Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-95

Exhibit 95

United States Steel Corporation

Mine Safety Disclosure

(Unaudited)

For the quarter ended March 31, 2013

Mine (Federal Mine Safety and Health Administration (MSHA) ID)	Total # of Significant & Substantial violations under §104 (a)	Total # of orders under §104(b) (a)	Total # of unwarrantable failure citations and orders under §104(d) (a)	Total # of violations under §110(b)(2) (a)	Total # of orders under §107(a) (a)	Total dollar value of proposed assessments from MSHA	Total # of mining related fatalities	Received Notice of Pattern of Violations under §104(e) (a) (yes/no)?	Received Notice of Potential to have Pattern under §104(e) (a) (yes/no)?	Total # of Legal Actions Pending with the Mine Safety and Health Review Commission as of Last Day of Period (b)	Legal Actions Initiated During Period	Legal Actions Resolved During Period
Mt. Iron (2100819, 2100820, 2100282)	22	0	0	0	1	$46,313	0	no	no	124	17	60
Keewatin (2103352)	9	0	0	0	0	$21,457	0	no	no	28	4	11

^(a)  References to Section numbers are to sections of the Federal Mine Safety and Health Act of 1977.

^(b)  Includes all legal actions pending before the Federal Mine Safety and Health Review Commission, together with the Administrative Law Judges thereof, for each of our iron ore operations. These actions may have been initiated in prior quarters. All of the legal actions were initiated by us to contest citations, orders or proposed assessments issued by the Federal Mine Safety and Health administration, and if we are successful, may result in the reduction or dismissal of those citations, orders or assessments. As of the last day of the period, all 152 legal actions were to contest citations and proposed assessments.

XML

Reclassifications from Accumulated Other Comprehensive Income (AOCI) (Tables)

3 Months Ended

Mar. 31, 2013

Other Comprehensive Income Activity Net of Tax

(in millions) (a)	Pension and Other Benefit Items			Foreign Currency Items			Total
Balance at December 31, 2012	$	(3,613	)	$	345		$	(3,268	)
Other comprehensive income before reclassifications		-			(37	)		(37	)
Amounts reclassified from AOCI (b)		69			-			69
Net current-period other comprehensive income		69			(37	)		32
Balance at March 31, 2013	$	(3,544	)	$	308		$	(3,236	)

^(a) All amounts are net of tax. Amounts in parentheses indicate debits.

^(b) See table below for further details.

Defined Benefit Plan In other Comprehensive Income

(In millions) (a)	Details about AOCI components	Amount reclassified from AOCI
	Amortization of pension and other benefit items
	Prior service costs	$	(3	)  (b)
	Actuarial gains/(losses)		(100	)  (b)
	Total before tax		(103	)
	Tax benefit		34
	Net of tax	$	(69	)

^(a) Amounts in parentheses indicate debits to income/loss.

^(b) These AOCI components are included in the computation of net periodic pension cost (see Note 6 for additional details).

XML

Computations for Basic and Diluted Income (Loss) Per Common Share from Continuing Operations (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share Disclosure [Line Items]
Net loss attributable to United States Steel Corporation shareholders	$ (73)	$ (219)
Plus income effect of assumed conversion-interest on convertible notes
Net loss after assumed conversion	$ (73)	$ (219)
Weighted-average shares outstanding (in thousands):
Basic	144,353	144,075
Effect of convertible notes
Effect of stock options, restricted stock units and performance awards
Adjusted weighted-average shares outstanding, diluted	144,353	144,075
Basic loss per common share	$ (0.51)	$ (1.52)
Diluted loss per common share	$ (0.51)	$ (1.52)

XML

Net Periodic Benefit Costs (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 32	$ 29
Interest cost	101	116
Expected return on plan assets	(154)	(153)
Amortization of prior service cost	6	5
Amortization of actuarial net loss	92	88
Net periodic benefit cost, excluding below	77	85
Multiemployer plans	18	17
Settlement, termination and curtailment gains		(2)
Net periodic benefit cost	95	100
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	7	7
Interest cost	35	45
Expected return on plan assets	(33)	(28)
Amortization of prior service cost	(3)	6
Amortization of actuarial net loss	8
Net periodic benefit cost, excluding below	14	30
Net periodic benefit cost	$ 14	$ 30

XML

Financial Assets and Liabilities Not Carried at Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Financial assets:
Investments and long-term receivables	$ 624		$ 609
Fair Value
Financial assets:
Investments and long-term receivables	41	[1]	39	[1]
Financial liabilities:
Debt	4,082	[2]	4,113	[2]
Carrying Amount
Financial assets:
Investments and long-term receivables	41	[1]	39	[1]
Financial liabilities:
Debt	$ 3,898	[2]	$ 3,902	[2]

[1] Excludes equity method investments.

[2] Excludes capital lease obligations.

XML

Antidilutive Securities that were Not Included in Computations of Diluted Income (Loss) Per Common Share (Detail) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	31,651		30,923
Securities granted under the 2005 Stock Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	5,537		3,864
Securities convertible under the Senior Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	26,114	[1]	27,059

[1] On March 27, 2013, we repurchased approximately $542 million aggregate principal amount of our 4% Senior Convertible Notes due in 2014. If the repurchases had occurred on January 1, 2013, the antidilutive securities would be 10,058 for the three months ended March 31, 2013.

XML

Payments for Contracts with Remaining Terms in Excess of One Year (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Unrecorded Unconditional Purchase Obligation [Line Items]
2013	$ 672
2014	704
2015	337
2016	322
2017	310
Later Years	1,722
Total	$ 4,067

XML

Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Segment	Mar. 31, 2012	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Line Items]
Number of reporting units that have a significant amount of goodwill	2
Carrying amount of acquired water rights with indefinite lives	$ 75		$ 75
Amortization expense	3	3
Expected amortization expense, remainder of current year	8
Expected amortization expense, for 2014	11
Expected amortization expense, for 2015	11
Expected amortization expense, for 2016	11
Expected amortization expense, for 2017	$ 11

XML

Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories

(In millions)	March 31, 2013		December 31, 2012
Raw materials	$	691	$	945
Semi-finished products		932		883
Finished products		585		573
Supplies and sundry items		108		102
Total	$	2,316	$	2,503

XML

Defined Benefit Plan In Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Amortization of pension and other benefit items
Prior service costs	$ (3)	[1],[2]
Actuarial gains/(losses)	(100)	[1],[2]
Total before tax	(103)	[1]
Tax benefit	34	[1]
Net of tax	$ (69)	[1]

[1] Amounts in parentheses indicate debits to income/loss.

[2] These AOCI components are included in the computation of net periodic pension cost (see Note 6 for additional details).

XML

Income and Dividends Per Common Share - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share Disclosure [Line Items]
Quarterly dividend per common share	$ 0.05	$ 0.05

XML

Changes in Accrued Liabilities for Remediation Activities (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Commitments and Contingencies Disclosure [Line Items]
Beginning of period	$ 203
Accruals for environmental remediation deemed probable and reasonably estimable	4
Payments	(4)
End of period	$ 203

XML

Accrued Liabilities for Remediation Activities Included in Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Line Items]
Accounts payable, Deferred credits and other non-current liabilities	$ 203	$ 203
Accounts Payable
Commitments and Contingencies Disclosure [Line Items]
Accounts payable, Deferred credits and other non-current liabilities	18	21
Deferred credits and other noncurrent liabilities
Commitments and Contingencies Disclosure [Line Items]
Accounts payable, Deferred credits and other non-current liabilities	$ 185	$ 182

XML

Consolidated Statement of Changes in Equity (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended												3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Comprehensive (Loss) Income	Mar. 31, 2012 Comprehensive (Loss) Income	Mar. 31, 2013 Retained Earnings	Mar. 31, 2012 Retained Earnings	Mar. 31, 2013 Accumulated Other Comprehensive Income (Loss)	Mar. 31, 2012 Accumulated Other Comprehensive Income (Loss)	Mar. 31, 2013 Common Stock	Dec. 31, 2012 Common Stock	Mar. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Mar. 31, 2013 Treasury Stock	Mar. 31, 2012 Treasury Stock	Mar. 31, 2013 Additional Paid-in Capital	Mar. 31, 2012 Additional Paid-in Capital	Mar. 31, 2013 Noncontrolling Interest	Dec. 31, 2012 Noncontrolling Interest	Mar. 31, 2012 Noncontrolling Interest	Dec. 31, 2011 Noncontrolling Interest
Stockholders Equity Note [Line Items]
Beginning balance	$ 3,478	$ 3,501			$ 3,463	$ 3,616	$ (3,268)	$ (3,367)	$ 151	$ 151	$ 151	$ 151	$ (521)	$ (550)	$ 3,652	$ 3,650	$ 1	$ 1	$ 1	$ 1
Comprehensive income:
Net loss	(73)	(219)	(73)	(219)	(73)	(219)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments	69	70	69	70			69	70
Currency translation adjustment	(37)	107	(37)	107			(37)	107
Issuance of conversion option in Senior Convertible Notes, net of tax	32														32
Employee stock plans	10	9											1	1	9	8
Dividends paid on common stock	(7)	(7)			(7)	(7)
Other	(1)				(1)
Ending balance	$ 3,471	$ 3,461	$ (41)	$ (42)	$ 3,382	$ 3,390	$ (3,236)	$ (3,190)	$ 151	$ 151	$ 151	$ 151	$ (520)	$ (549)	$ 3,693	$ 3,658	$ 1	$ 1	$ 1	$ 1

XML

Related Party Transactions

3 Months Ended

Mar. 31, 2013

Related Party Transactions

19. Related Party Transactions

Net sales to related parties and receivables from related parties primarily reflect sales of steel products to equity investees. Generally, transactions are conducted under long-term market-based contractual arrangements. Related party sales and service transactions were $278 million and $339 million for the three months ended March 31, 2013 and 2012, respectively.

Purchases from related parties for outside processing services provided by equity investees amounted to $19 million and $13 million for the three months ended March 31, 2013 and 2012, respectively. Purchases of iron ore pellets from related parties amounted to $64 million and $59 million for the three months ended March 31, 2013 and 2012, respectively.

Accounts payable to related parties include amounts collected on behalf of PRO-TEC Coating Company (PRO-TEC) of $88 million and $75 million at March 31, 2013 and December 31, 2012, respectively. U. S. Steel, as PRO-TEC’s exclusive sales agent, is responsible for credit risk related to PRO-TEC’s receivables. U. S. Steel also provides PRO-TEC marketing, selling and customer service functions. Payables to other related parties totaled $3 million at both March 31, 2013 and December 31, 2012.

XML

Net Interest and Other Financial Costs - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest Expense [Line Items]
Foreign currency transaction gain (losses)realized	$ (9)	$ 2
2014 Senior Convertible Notes
Interest Expense [Line Items]
Premium on repurchase of senior notes	34
Repurchased face amount of senior notes	$ 542
Senior notes stated interest rate	4.00%
Senior notes, Maturity Date	May 15, 2014

XML

Results of Segment Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Customer Sales	$ 4,595	$ 5,172
Net Sales	4,595	5,172
Income (loss) from investees	8	24
Income (loss) from operations	38	(73)
Total Reportable Segments
Segment Reporting Information [Line Items]
Customer Sales	4,572	5,061
Intersegment Sales	337	513
Net Sales	4,909	5,574
Income (loss) from investees	9	25
Income (loss) from operations	89	278
Total Reportable Segments | Flat-rolled
Segment Reporting Information [Line Items]
Customer Sales	3,103	3,300
Intersegment Sales	335	463
Net Sales	3,438	3,763
Income (loss) from investees	10	28
Income (loss) from operations	(13)	183
Total Reportable Segments | USSE
Segment Reporting Information [Line Items]
Customer Sales	783	815
Intersegment Sales	1	49
Net Sales	784	864
Income (loss) from operations	38	(34)
Total Reportable Segments | Tubular
Segment Reporting Information [Line Items]
Customer Sales	686	946
Intersegment Sales	1	1
Net Sales	687	947
Income (loss) from investees	(1)	(3)
Income (loss) from operations	64	129
Other Businesses
Segment Reporting Information [Line Items]
Customer Sales	23	111
Intersegment Sales	34	56
Net Sales	57	167
Income (loss) from investees	(1)	(1)
Income (loss) from operations	5	17
Reconciling Items and Eliminations
Segment Reporting Information [Line Items]
Intersegment Sales	(371)	(569)
Net Sales	(371)	(569)
Income (loss) from operations	$ (56)	$ (368)

XML

Contingencies and Commitments - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended										3 Months Ended		3 Months Ended						3 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2013 USD ($) Micron T	Mar. 31, 2012 USD ($)	Dec. 31, 2012 USD ($)	Mar. 31, 2013 Randle Reef USD ($)	Mar. 31, 2013 Randle Reef CAD	Mar. 31, 2013 National Government Randle Reef USD ($)	Mar. 31, 2013 National Government Randle Reef CAD	Mar. 31, 2013 Provincial Government Randle Reef USD ($)	Mar. 31, 2013 Provincial Government Randle Reef CAD	Mar. 31, 2013 Local Sources Randle Reef USD ($)	Mar. 31, 2013 Local Sources Randle Reef CAD	Mar. 31, 2013 U. S. Steel Canada Inc. Randle Reef USD ($) T	Mar. 31, 2013 U. S. Steel Canada Inc. Randle Reef CAD	Mar. 31, 2013 Minimum USD ($)	Mar. 31, 2013 Minimum Gateway Energy and Coke Company, LLC	Mar. 31, 2013 Maximum USD ($)	Mar. 31, 2013 Maximum Gateway Energy and Coke Company, LLC	Mar. 31, 2013 Antitrust Class Actions LegalMatter	Mar. 31, 2013 Environmental Remediation Expense USD ($)	Mar. 31, 2012 Environmental Remediation Expense USD ($)	Mar. 31, 2013 Projects with Ongoing Study and Scope Development USD ($) Project	Mar. 31, 2013 Projects with Ongoing Study and Scope Development Resource Conservation and Recovery Act (RCRA) Programs Project	Mar. 31, 2013 Projects with Ongoing Study and Scope Development Voluntary Remediation Program Project	Mar. 31, 2013 Projects with Ongoing Study and Scope Development Minimum USD ($)	Mar. 31, 2013 Projects with Ongoing Study and Scope Development Maximum USD ($)	Mar. 31, 2013 Environmental Remediation Projects Less Than One Million USD ($)	Mar. 31, 2013 Environmental Remediation Projects Less Than One Million Maximum USD ($)	Mar. 31, 2013 Asbestos Matters USD ($) LegalMatter Plaintiff	Dec. 31, 2012 Asbestos Matters USD ($) Plaintiff LegalMatter	Mar. 31, 2013 Asbestos Matters Allege Suffering from Mesothelioma Plaintiff	Mar. 31, 2013 Asbestos Matters Minimum Defendant	Mar. 31, 2013 Asbestos Matters Maximum Defendant	Mar. 31, 2013 Gary Works, Project with Defined Scope USD ($)	Mar. 31, 2013 Other Project with Defined Scope Greater Than or Equal to $5 Million USD ($) Project	Mar. 31, 2013 Other Project with Defined Scope Greater Than or Equal to $5 Million Minimum USD ($)	Mar. 31, 2013 Environmental Remediation Other Projects USD ($) Project	Mar. 31, 2013 Environmental Remediation Other Projects Minimum USD ($)	Mar. 31, 2013 Environmental Remediation Other Projects Maximum USD ($)	Mar. 31, 2013 Surety Bonds USD ($)	Mar. 31, 2013 Restricted Cash To Fund Certain Capital Projects USD ($)
Loss Contingencies [Line Items]
Asbestos matters																												As of March 31, 2013, U. S. Steel was a defendant in approximately 780 active cases involving approximately 3,320 plaintiffs. Many of these cases involve multiple defendants (typically from fifty to more than one hundred).
Active cases brought against U.S. Steel																												780	790
Number of plaintiffs involved																												3,320	3,330	265
Number of defendants involved																		8													50	100
Number of claims pending in jurisdictions																												2,560
Percentage of claims pending in jurisdictions																												77.00%
Payment in settlement of claims																												$ 1	$ 15
Cases resolved upon payment																												75	190
Number of cases added and resulted in claims																												65	285
Expenses related to remediation included in cost of sales																			4	3
Projected percentage remediation costs may exceed accrued liabilities														15.00%		30.00%
Environmental remediation projects																					5	4	1											2		6
Accrued liabilities for remediation activities	203		203																		3					7	1						60	86	5	13	1	5
Environment exit costs, possible additional loss																								25	45
Accrued liabilities for post-closure site monitoring and other costs	28
Accrued liability for administrative and legal costs	6
Capital expenditures	10	16
Requirements of Environmental Protection Agency	On May 13, 2010, the EPA published its final Greenhouse Gas Tailoring Rule establishing a mechanism for regulating GHG emissions from facilities through the Clean Air Act’s Prevention of Significant Deterioration (PSD) permitting process. U. S. Steel reported its emissions under these rules in accordance with the regulation and its deadlines. Starting in 2011, new projects that increase GHG emissions by more than 75,000 tons per year have new PSD requirements based on best available control technology (BACT), but only if the project also significantly increases emissions of at least one non-GHG pollutant. Only existing sources with Title V permits or new sources obtaining Title V permits for non-GHG pollutants will also be required to address GHG emissions. Starting July 1, 2011, new sources not already subject to Title V requirements that emit over 100,000 tons per year, or modifications to existing permits that increase GHG emissions by more than 75,000 tons per year, will be subject to PSD and Title V requirements. On November 17, 2010 the EPA issued its “PSD and Title V Permitting Guidance for Greenhouse Gases” and “Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry.” With this guidance, EPA intends to help state and local air permitting authorities identify greenhouse gas reductions under the Clean Air Act. Additionally, the EPA revised the National Ambient Air Quality Standards (NAAQS) for nitrogen oxide, sulfur dioxide and lead in 2010 and is in the process of revising the NAAQS for 2.5 micron particulate matter, ozone and sulfur dioxides.
Minimum annual emission of new sources subject to PSD and Title V requirement	100,000
Minimum annual increment in GHG emission due to modifications to existing permits subject to Title V and PSD requirement if only project significantly increases emissions of at least one non-GHG pollutant	75,000
NAAQS micron particulate matter in revision process	2.5
Estimated capital expenditures of complying with BAT over 2013 to 2016 period														300		400
Financial assurance guarantees, maximum	29																																						165
Regulatory agencies estimate expenditures amount				118	120
Committed contribution						39	40	39	40	39	40
Liability accrued related to committed contributions												10
Contributions made during the period, cash												2	2
Contributions made during the period, hot rolled steel												11,000	11,000
Expected date of committed contribution												2014	2014
Residual value of equipment	12
Restricted cash	153		181																																					62
Restricted cash current	4		5
Contract commitments to acquire property, plant and equipment	254
Unconditional purchase obligation term														2 years		15 years
Maximum default payment on termination of agreement	255
Percentage of purchase obligation															90.00%		105.00%
Total payment under take-or-pay contracts	$ 183	$ 185

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Financial Assets and Liabilities Not Carried at Fair Value

The following table summarizes U. S. Steel’s financial assets and liabilities that were not carried at fair value at March 31, 2013 and December 31, 2012.

	March 31, 2013				December 31, 2012
(In millions)	Fair Value		Carrying Amount		Fair Value		Carrying Amount
Financial assets:
Investments and long-term receivables (a)	$	41	$	41	$	39	$	39
Financial liabilities:
Debt (b)	$	4,082	$	3,898	$	4,113	$	3,902

^(a)  Excludes equity method investments.

^(b)  Excludes capital lease obligations.

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Summarized Unaudited Income Statement Information for Significant Equity Investments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Net sales	$ 291	$ 181
Cost of sales	185	170
Operating income	104	10
Net income	104	10
Net income attributable to significant equity investments	$ 104	$ 10

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Changes in Carrying Values of Asset Retirement Obligations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Reconciliation of Changes in Asset Retirement Obligations [Line Items]
Balance at beginning of year	$ 33	$ 38
Additional obligations incurred		2
Obligations settled	(2)	(9)	[1]
Accretion expense	1	2
Balance at end of period	$ 32	$ 33

[1] Includes $2 million as a result of the sale of USSS on January 31, 2012. See Note 4 for additional details.

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Location and Amounts of Fair Values and Gains Or Losses Related to Derivatives in Financial Statements (Detail) (Foreign Exchange Forward Contracts, USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts Receivable
Derivative [Line Items]
Fair value of derivatives	$ 4
Accounts Payable
Derivative [Line Items]
Fair value of derivatives	$ 3	$ 12

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Amortizable Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified					3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Customer Relationships	Dec. 31, 2012 Customer Relationships	Mar. 31, 2013 Customer Relationships Minimum	Mar. 31, 2013 Customer Relationships Maximum	Mar. 31, 2013 Other Intangible Assets	Dec. 31, 2012 Other Intangible Assets	Mar. 31, 2013 Other Intangible Assets Minimum	Mar. 31, 2013 Other Intangible Assets Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Lives (in years)					22 years	23 years			2 years	20 years
Gross Carrying Amount	$ 242	$ 243	$ 219	$ 221			$ 23	$ 22
Accumulated Amortization	68	65	56	54			12	11
Net Amount	$ 174	$ 178	$ 163	$ 167			$ 11	$ 11

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Segment Information

3 Months Ended

Mar. 31, 2013

Segment Information

3. Segment Information

U. S. Steel has three reportable segments: Flat-rolled Products (Flat-rolled), U. S. Steel Europe (USSE), and Tubular Products (Tubular). The results of several other operating segments that do not constitute reportable segments are combined and disclosed in the Other Businesses category. Prior to January 31, 2012, our USSE reportable segment consisted of U. S. Steel Košice (USSK) and U. S. Steel Serbia (USSS). On January 31, 2012, U. S. Steel sold USSS (see Note 4). The USSE segment information subsequent to January 31, 2012 reflects the results of USSK only.

The chief operating decision maker evaluates performance and determines resource allocations based on a number of factors, the primary measure being income (loss) from operations. Income (loss) from operations for reportable segments and Other Businesses does not include net interest and other financial costs (income), income taxes, postretirement benefit expenses (other than service cost and amortization of prior service cost for active employees) and certain other items that management believes are not indicative of future results. Information on segment assets is not disclosed, as it is not reviewed by the chief operating decision maker.

The accounting principles applied at the operating segment level in determining income (loss) from operations are generally the same as those applied at the consolidated financial statement level. The transfer value for steel rounds from Flat-rolled to Tubular is based on cost. All other intersegment sales and transfers are accounted for at market-based prices and are eliminated at the corporate consolidation level. Corporate-level selling, general and administrative expenses and costs related to certain former businesses are allocated to the reportable segments and Other Businesses based on measures of activity that management believes are reasonable.

The results of segment operations for the three months ended March 31, 2013 and 2012 are:

(In millions) First Quarter 2013	Customer Sales		Intersegment Sales			Net Sales			Income (loss) from investees			Income (loss) from operations
Flat-rolled	$	3,103	$	335		$	3,438		$	10		$	(13	)
USSE		783		1			784			-			38
Tubular		686		1			687			(1	)		64
Total reportable segments		4,572		337			4,909			9			89
Other Businesses		23		34			57			(1	)		5
Reconciling Items and Eliminations		-		(371	)		(371	)		-			(56	)
Total	$	4,595	$	-		$	4,595		$	8		$	38
First Quarter 2012
Flat-rolled	$	3,300	$	463		$	3,763		$	28		$	183
USSE		815		49			864			-			(34	)
Tubular		946		1			947			(3	)		129
Total reportable segments		5,061		513			5,574			25			278
Other Businesses		111		56			167			(1	)		17
Reconciling Items and Eliminations		-		(569	)		(569	)		-			(368	)
Total	$	5,172	$	-		$	5,172		$	24		$	(73	)

The following is a schedule of reconciling items to income (loss) from operations:

	Three Months Ended March 31,
(In millions)	2013			2012
Items not allocated to segments:
Postretirement benefit expense (a)	$	(56	)	$	(77	)
Other items not allocated to segments:
Net loss on the sale of assets (Note 4)	$	-		$	(310	)
Property tax settlements		-			19
Total other items not allocated to segments		-			(291	)
Total reconciling items	$	(56	)	$	(368	)

^(a)  Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active employees, associated with our pension, retiree health care and life insurance benefit plans.

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Location and Amounts of Gains or Losses Related to Derivatives in Financial Statements (Detail) (Foreign Exchange Forward Contracts, Other financial costs/income, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Foreign Exchange Forward Contracts | Other financial costs/income
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to derivatives	$ 11	$ (13)

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Schedule of Reconciling Items to Income (Loss) from Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Items not allocated to segments:
Postretirement benefit expense	$ (56)	[1]	$ (77)	[1]
Other items not allocated to segments:
Net loss on the sale of assets (Note 4)			(310)
Property tax settlements			19
Total other items not allocated to segments			(291)
Total reconciling items	38		(73)
Unallocated Amount to Segment
Other items not allocated to segments:
Total reconciling items	$ (56)		$ (368)

[1] Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active employees, associated with our pension, retiree health care and life insurance benefit plans.

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Changes in Carrying Amount of Goodwill by Segment

The changes in the carrying amount of goodwill by segment for the three months ended March 31, 2013 are as follows:

	Flat-rolled Segment			USSE Segment		Tubular Segment		Total
Balance at December 31, 2012	$	984		$	4	$	834	$	1,822
Currency translation		(14	)		-		-		(14	)
Balance at March 31, 2013	$	970		$	4	$	834	$	1,808

Amortizable Intangible Assets

Amortizable intangible assets are being amortized on a straight-line basis over their estimated useful lives and are detailed below:

			As of March 31, 2013						As of December 31, 2012
(In millions)	Useful Lives		Gross Carrying Amount		Accumulated Amortization		Net Amount		Gross Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships		22-23 Years	$	219	$	56	$	163	$	221	$	54	$	167
Other		2-20 Years		23		12		11		22		11		11
Total amortizable intangible assets			$	242	$	68	$	174	$	243	$	65	$	178

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Segment Information (Tables)

3 Months Ended

Mar. 31, 2013

Results of Segment Operations

The results of segment operations for the three months ended March 31, 2013 and 2012 are:

(In millions) First Quarter 2013	Customer Sales		Intersegment Sales			Net Sales			Income (loss) from investees			Income (loss) from operations
Flat-rolled	$	3,103	$	335		$	3,438		$	10		$	(13	)
USSE		783		1			784			-			38
Tubular		686		1			687			(1	)		64
Total reportable segments		4,572		337			4,909			9			89
Other Businesses		23		34			57			(1	)		5
Reconciling Items and Eliminations		-		(371	)		(371	)		-			(56	)
Total	$	4,595	$	-		$	4,595		$	8		$	38
First Quarter 2012
Flat-rolled	$	3,300	$	463		$	3,763		$	28		$	183
USSE		815		49			864			-			(34	)
Tubular		946		1			947			(3	)		129
Total reportable segments		5,061		513			5,574			25			278
Other Businesses		111		56			167			(1	)		17
Reconciling Items and Eliminations		-		(569	)		(569	)		-			(368	)
Total	$	5,172	$	-		$	5,172		$	24		$	(73	)

Segment Information

The following is a schedule of reconciling items to income (loss) from operations:

	Three Months Ended March 31,
(In millions)	2013			2012
Items not allocated to segments:
Postretirement benefit expense (a)	$	(56	)	$	(77	)
Other items not allocated to segments:
Net loss on the sale of assets (Note 4)	$	-		$	(310	)
Property tax settlements		-			19
Total other items not allocated to segments		-			(291	)
Total reconciling items	$	(56	)	$	(368	)

^(a)  Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active employees, associated with our pension, retiree health care and life insurance benefit plans.

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Antidilutive Securities that were Not Included in Computations of Diluted Income (Loss) Per Common Share (Parenthetical) (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	31,651	30,923
2014 Senior Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Repurchased face amount of senior notes	542
Antidilutive Securities	10,058

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Dispositions - Additional Information (Detail) (USD $)	3 Months Ended	1 Months Ended	3 Months Ended	1 Months Ended
	Mar. 31, 2012	Jan. 31, 2012 USSS	Mar. 31, 2013 USSS	Feb. 29, 2012 Birmingham Southern Railroad Company
Significant Acquisitions and Disposals [Line Items]
Proceed from sale of USSS		$ 1
Additional payment received by USSK for intercompany balances owed by USSS		40,000,000
Gain (loss) on sale of assets	$ (310,000,000)	$ (399,000,000)	$ (399,000,000)	$ 89,000,000

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Pensions and Other Benefits (Tables)

3 Months Ended

Mar. 31, 2013

Net Periodic Benefit Cost

The following table reflects the components of net periodic benefit cost for the three months ended March 31, 2013 and 2012:

	Pension Benefits						Other Benefits
(In millions)	2013			2012			2013			2012
Service cost	$	32		$	29		$	7		$	7
Interest cost		101			116			35			45
Expected return on plan assets		(154	)		(153	)		(33	)		(28	)
Amortization of prior service cost		6			5			(3	)		6
Amortization of actuarial net loss		92			88			8			-
Net periodic benefit cost, excluding below		77			85			14			30
Multiemployer plans		18			17			-			-
Settlement, termination and curtailment gains		-			(2	)		-			-
Net periodic benefit cost	$	95		$	100		$	14		$	30

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Significant Equity Investments (Tables)

3 Months Ended

Mar. 31, 2013

Summarized Unaudited Income Statement Information for Significant Equity Investments

Summarized unaudited income statement information for our significant equity investments for the three months ended March 31, 2013 and 2012 is reported below (in millions, amounts represent 100% of investee financial information):

	2013		2012
Net sales	$	291	$	181
Cost of sales		185		170
Operating income		104		10
Net income		104		10
Net income attributable to significant equity investments		104		10

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New Accounting Standards

3 Months Ended

Mar. 31, 2013

New Accounting Standards

2. New Accounting Standards

On February 5, 2013, the FASB issued Accounting Standards Update No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02). ASU 2013-02 requires companies to present information about reclassification adjustments from accumulated other comprehensive income, including the amount of the reclassification and the income statement line items affected by the reclassification. The information must be presented in the financial statements in a single note or on the face of the financial statements. ASU 2013-02 is effective for interim and annual periods beginning after December 15, 2012. U. S. Steel adopted ASU 2013-02 effective January 1, 2013 and has provided the required disclosures in Note 18.

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Income and Dividends Per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Computations for Basic and Diluted Income (Loss) Per Common Share from Continuing Operations

The computations for basic and diluted income (loss) per common share from continuing operations are as follows:

	Three Months Ended March 31,
(Dollars in millions, except per share amounts)	2013			2012
Net loss attributable to United States Steel
Corporation shareholders	$	(73	)	$	(219	)
Plus income effect of assumed conversion-interest on convertible notes		-			-
Net loss after assumed conversion	$	(73	)	$	(219	)
Weighted-average shares outstanding (in thousands):
Basic		144,353			144,075
Effect of convertible notes		-			-
Effect of stock options, restricted stock units and performance awards		-			-
Adjusted weighted-average shares outstanding, diluted		144,353			144,075
Basic loss per common share	$	(0.51	)	$	(1.52	)
Diluted loss per common share	$	(0.51	)	$	(1.52	)

Antidilutive Securities that were Not Included in Computations of Diluted Income (Loss) Per Common Share

The following table summarizes the securities that were antidilutive:

	Three Months Ended March 31,
(in thousands)	2013			2012
Securities granted under the 2005 Stock Incentive Plan		5,537			3,864
Securities convertible under the Senior Convertible Notes		26,114	(a)		27,059
Total		31,651			30,923

^(a) On March 27, 2013, we repurchased approximately $542 million aggregate principal amount of our 4% Senior Convertible Notes due in 2014. If the repurchases had occurred on January 1, 2013, the antidilutive securities would be 10,058 for the three months ended March 31, 2013.

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Contingencies and Commitments (Tables)

3 Months Ended

Mar. 31, 2013

Changes in Accrued Liabilities for Remediation Activities

Changes in accrued liabilities for remediation activities are summarized in the following table:

(In millions)	Three Months Ended March 31, 2013
Beginning of period	$	203
Accruals for environmental remediation deemed probable and reasonably estimable		4
Payments		(4	)
End of period	$	203

Accrued Liabilities for Remediation Activities Included in Balance Sheet

Accrued liabilities for remediation activities are included in the following balance sheet lines:

(In millions)	March 31, 2013		December 31, 2012
Accounts payable	$	18	$	21
Deferred credits and other noncurrent liabilities		185		182
Total	$	203	$	203

Payments for Contracts with Remaining Terms in Excess of One Year

Payments for contracts with remaining terms in excess of one year are summarized below (in millions):

Remainder of 2013	2014	2015	2016	2017	Later Years	Total
$672	$704	$337	$322	$310	$1,722	$	4,067

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Significant Equity Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Net income (loss) of equity method investments	$ 8	$ 24
Significant Equity Investments [Member]
Schedule of Equity Method Investments [Line Items]
Net income (loss) of equity method investments	$ 5	$ 5

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Other Comprehensive Income Activity Net of Tax (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	$ (3,268)	[1]
Other comprehensive income before reclassifications	(37)	[1]
Amounts reclassified from AOCI	69	[1],[2]
Net current-period other comprehensive income	32	[1]
Ending Balance	(3,236)	[1]
Defined Benefit Pension Items
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	(3,613)	[1]
Amounts reclassified from AOCI	69	[1],[2]
Net current-period other comprehensive income	69	[1]
Ending Balance	(3,544)	[1]
Foreign Currency Items
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]
Beginning Balance	345	[1]
Other comprehensive income before reclassifications	(37)	[1]
Net current-period other comprehensive income	(37)	[1]
Ending Balance	$ 308	[1]

[1] All amounts are net of tax. Amounts in parentheses indicate debits.

[2] See table below for further details.

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Consolidated Statement Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales:
Net sales	$ 4,317	$ 4,833
Net sales to related parties (Note 19)	278	339
Net Sales	4,595	5,172
Operating expenses (income):
Cost of sales (excludes items shown below)	4,242	4,626
Selling, general and administrative expenses	145	173
Depreciation, depletion and amortization	171	163
Income from investees	(8)	(24)
Net loss on disposal of assets (Note 4)	1	309
Other expense (income), net	6	(2)
Total	4,557	5,245
Income (loss) from operations	38	(73)
Interest expense	85	49
Interest income	(1)	(4)
Other financial costs	20	5
Net interest and other financial costs (Note 7)	104	50
Loss before income taxes	(66)	(123)
Income tax provision (Note 8)	7	96
Net loss	(73)	(219)
Less: Net income attributable to noncontrolling interests
Net loss attributable to United States Steel Corporation	$ (73)	$ (219)
Net loss per share attributable to United States Steel Corporation shareholders:
- Basic	$ (0.51)	$ (1.52)
- Diluted	$ (0.51)	$ (1.52)

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Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Flat-rolled	Mar. 31, 2013 USSE	Dec. 31, 2012 USSE	Mar. 31, 2013 Tubular	Dec. 31, 2012 Tubular
Goodwill [Line Items]
Goodwill beginning balance	$ 1,822	$ 984	$ 4	$ 4	$ 834	$ 834
Currency translation	(14)	(14)
Goodwill ending balance	$ 1,808	$ 970	$ 4	$ 4	$ 834	$ 834

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Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net loss	$ (73)	$ (219)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, depletion and amortization	171	163
Provision for doubtful accounts	(1)	(3)
Pensions and other postretirement benefits	(11)	(131)
Deferred income taxes	4	44
Net loss on disposal of assets (Note 4)	1	309
Currency remeasurement loss (gain)	19	(13)
Distributions received, net of equity investees income	(5)	7
Changes in:
Current receivables	(203)	(175)
Inventories	166	264
Current accounts payable and accrued expenses	135	87
Income taxes receivable/payable	(16)	54
Bank checks outstanding	33	33
All other, net	13	6
Net cash provided by operating activities	233	426
Investing activities:
Capital expenditures	(116)	(189)
Disposal of assets		131
Change in restricted cash, net	27	4
Investments, net	(3)	(2)
Net cash used in investing activities	(92)	(56)
Financing activities:
Revolving credit facilities - borrowings		522
Revolving credit facilities - repayments		(652)
Receivables Purchase Agreement payments		(380)
Issuance of long-term debt, net of financing costs	578	392
Repayment of long-term debt	(542)	(4)
Dividends paid	(7)	(7)
Net cash provided by (used in) financing activities	29	(129)
Effect of exchange rate changes on cash	(7)	3
Net increase in cash and cash equivalents	163	244
Cash and cash equivalents at beginning of year	570	408
Cash and cash equivalents at end of period	$ 733	$ 652

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Inventories (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Line Items]
Raw materials	$ 691	$ 945
Semi-finished products	932	883
Finished products	585	573
Supplies and sundry items	108	102
Total	$ 2,316	$ 2,503

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Debt (Tables)

3 Months Ended

Mar. 31, 2013

Debt

(In millions)	Interest Rates %	Maturity	March 31, 2013		December 31, 2012
2037 Senior Notes	6.65	2037	$	350	$	350
2022 Senior Notes	7.50	2022		400		400
2021 Senior Notes	6.875	2021		275		-
2020 Senior Notes	7.375	2020		600		600
2018 Senior Notes	7.00	2018		500		500
2017 Senior Notes	6.05	2017		450		450
2019 Senior Convertible Notes	2.75	2019		316		-
2014 Senior Convertible Notes	4.00	2014		321		863
Province Note (C$150 million)	1.00	2015		148		151
Environmental Revenue Bonds	5.38 - 6.88	2015 - 2042		549		549
Recovery Zone Facility Bonds	6.75	2040		70		70
Fairfield Caster Lease		2022		35		35
Other capital leases and all other obligations		2013 - 2014		1		1
Amended Credit Agreement	Variable	2016		-		-
USSK Revolver	Variable	2013		-		-
USSK credit facilities	Variable	2015		-		-
Total Debt				4,015		3,969
Less Province Note fair value adjustment				21		23
Less unamortized discount				60		8
Less short-term debt and long-term debt due within one year				2		2
Long-term debt			$	3,932	$	3,936

Redemption Price of Twenty Twenty One Senior Notes as Percentage of Principal Amount Plus Accrued and Unpaid Interest to, but Excluding, Redemption Date

U. S. Steel may redeem the 2021 Senior Notes, in whole or in part, at our option at any time and from time to time on or after April 1, 2017 at the redemption price for such notes set forth below as a percentage of the principal amount, plus accrued and unpaid interest to, but excluding, the redemption date, if redeemed during the twelve-month period beginning April 1 of the years indicated below:

Year	Redemption Price
2017		103.438	%
2018		101.719	%
2019 and thereafter		100.000	%

Eligible Accounts Receivable and Receivables Sold to Third-Party Conduits

The eligible accounts receivable and receivables sold to third-party conduits are summarized below:

(In millions)	March 31, 2013		December 31, 2012
Balance of accounts receivable-net, eligible for sale to third-party conduits	$	1,192	$	1,127
Accounts receivable sold to third-party conduits		-		-
Balance included in Receivables on the balance sheet of U. S. Steel	$	1,192	$	1,127

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Redemption Price of Twenty Twenty One Senior Notes as Percentage of Principal Amount Plus Accrued and Unpaid Interest to, but Excluding, Redemption Date (Detail)	Mar. 31, 2013
2017
Debt Instrument [Line Items]
2021 Senior Notes, redemption price	103.438%
2018
Debt Instrument [Line Items]
2021 Senior Notes, redemption price	101.719%
2019 and Thereafter
Debt Instrument [Line Items]
2021 Senior Notes, redemption price	100.00%

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2013

Fair Value of Financial Instruments

16. Fair Value of Financial Instruments

The carrying value of cash and cash equivalents, current accounts and notes receivable, accounts payable, bank checks outstanding and accrued interest included in the Consolidated Balance Sheet approximate fair value. See Note 12 for disclosure of U. S. Steel’s derivative instruments, which are accounted for at fair value on a recurring basis.

The following table summarizes U. S. Steel’s financial assets and liabilities that were not carried at fair value at March 31, 2013 and December 31, 2012.

	March 31, 2013				December 31, 2012
(In millions)	Fair Value		Carrying Amount		Fair Value		Carrying Amount
Financial assets:
Investments and long-term receivables (a)	$	41	$	41	$	39	$	39
Financial liabilities:
Debt (b)	$	4,082	$	3,898	$	4,113	$	3,902

^(a)  Excludes equity method investments.

^(b)  Excludes capital lease obligations.

The following methods and assumptions were used to estimate the fair value of financial instruments included in the table above:

Investments and long-term receivables: Fair value was based on Level 2 inputs which were discounted cash flows. U. S. Steel is subject to market risk and liquidity risk related to its investments.

Long-term debt instruments: Fair value was determined using Level 2 inputs which were derived from quoted market prices and is based on the yield on public debt where available or current borrowing rates available for financings with similar terms and maturities.

Fair value of the financial assets and liabilities disclosed herein is not necessarily representative of the amount that could be realized or settled, nor does the fair value amount consider the tax consequences of realization or settlement.

Financial guarantees are U. S. Steel’s only unrecognized financial instrument. For details relating to financial guarantees see Note 20.

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Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2013

Changes in Carrying Values of Asset Retirement Obligations

The following table reflects changes in the carrying values of AROs:

(In millions)	March 31, 2013			December 31, 2012
Balance at beginning of year	$	33		$	38
Additional obligations incurred		-			2
Obligations settled		(2	)		(9	)  (a)
Accretion expense		1			2
Balance at end of period	$	32		$	33

^(a) Includes $2 million as a result of the sale of USSS on January 31, 2012. See Note 4 for additional details.

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Reclassifications from Accumulated Other Comprehensive Income (AOCI)

3 Months Ended

Mar. 31, 2013

Reclassifications from Accumulated Other Comprehensive Income (AOCI)

18. Reclassifications from Accumulated Other Comprehensive Income (AOCI)

(in millions) (a)	Pension and Other Benefit Items			Foreign Currency Items			Total
Balance at December 31, 2012	$	(3,613	)	$	345		$	(3,268	)
Other comprehensive income before reclassifications		-			(37	)		(37	)
Amounts reclassified from AOCI (b)		69			-			69
Net current-period other comprehensive income		69			(37	)		32
Balance at March 31, 2013	$	(3,544	)	$	308		$	(3,236	)

^(a) All amounts are net of tax. Amounts in parentheses indicate debits.

^(b) See table below for further details.

(In millions) (a)	Details about AOCI components	Amount reclassified from AOCI
	Amortization of pension and other benefit items
	Prior service costs	$	(3	)  (b)
	Actuarial gains/(losses)		(100	)  (b)
	Total before tax		(103	)
	Tax benefit		34
	Net of tax	$	(69	)

^(a) Amounts in parentheses indicate debits to income/loss.

^(b) These AOCI components are included in the computation of net periodic pension cost (see Note 6 for additional details).

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Changes in Carrying Values of Asset Retirement Obligations (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended		1 Months Ended
	Mar. 31, 2013	Dec. 31, 2012		Jan. 31, 2012 USSS
Reconciliation of Changes in Asset Retirement Obligations [Line Items]
Obligations settled	$ 2	$ 9	[1]	$ 2

[1] Includes $2 million as a result of the sale of USSS on January 31, 2012. See Note 4 for additional details.

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Basis of Presentation

3 Months Ended

Mar. 31, 2013

Basis of Presentation

1. Basis of Presentation

United States Steel Corporation (U. S. Steel) produces and sells steel mill products, including flat-rolled and tubular products, in North America and Central Europe. Operations in North America also include transportation services (railroad and barge operations) and real estate operations.

The year-end consolidated balance sheet data was derived from audited statements but does not include all disclosures required for complete financial statements by accounting principles generally accepted in the United States of America (U.S. GAAP). The other information in these financial statements is unaudited but, in the opinion of management, reflects all adjustments necessary for a fair presentation of the results for the periods covered. All such adjustments are of a normal recurring nature unless disclosed otherwise. These financial statements, including notes, have been prepared in accordance with the applicable rules of the Securities and Exchange Commission and do not include all of the information and disclosures required by accounting principles generally accepted in the United States of America for complete financial statements. Additional information is contained in the United States Steel Corporation Annual Report on Form 10-K for the year ended December 31, 2012 which should be read in conjunction with these financial statements.

Reclassifications

Certain reclassifications of prior years’ data have been made to conform to the current year presentation.

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Consolidated Statement Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net loss	$ (73)	$ (219)
Other comprehensive income (loss), net of tax:
Changes in foreign currency translation adjustments	(37)	107
Changes in pension and other employee benefit accounts	69	70
Total other comprehensive income, net of tax	32	177
Comprehensive loss including noncontrolling interest	(41)	(42)
Comprehensive loss attributable to noncontrolling interest
Comprehensive loss attributable to United States Steel Corporation	$ (41)	$ (42)

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Inventories

3 Months Ended

Mar. 31, 2013

Inventories

11. Inventories

Inventories are carried at the lower of cost or market. The first-in, first-out method is the predominant method of inventory costing in Europe and Canada. The last-in, first-out (LIFO) method is the predominant method of inventory costing in the United States. At March 31, 2013 and December 31, 2012, the LIFO method accounted for 61 percent and 56 percent of total inventory values, respectively.

(In millions)	March 31, 2013		December 31, 2012
Raw materials	$	691	$	945
Semi-finished products		932		883
Finished products		585		573
Supplies and sundry items		108		102
Total	$	2,316	$	2,503

Current acquisition costs were estimated to exceed the above inventory values by $1.0 billion at both March 31, 2013 and December 31, 2012. The effect of liquidations of LIFO inventories was insignificant in both the three months ended March 31, 2013 and 2012.

Inventory includes $97 million and $86 million of land held for residential or commercial development as of March 31, 2013 and December 31, 2012, respectively.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 25, 2013
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	X
Entity Registrant Name	UNITED STATES STEEL CORP
Entity Central Index Key	0001163302
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		144,284,576

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Derivative Instruments

3 Months Ended

Mar. 31, 2013

Derivative Instruments

12. Derivative Instruments

U. S. Steel is exposed to foreign currency exchange rate risks as a result of our European and Canadian operations. USSE’s revenues are primarily in euros and costs are primarily in U.S. dollars and euros. USSC’s revenues and costs are denominated in both Canadian and U.S. dollars. In addition, foreign cash requirements have been, and in the future, may be funded by intercompany loans, creating intercompany monetary assets and liabilities in currencies other than the functional currency of the entities involved, which can affect income when remeasured at the end of each period.

U. S. Steel uses euro forward sales contracts with maturities no longer than 12 months to exchange euros for U.S. dollars to manage our currency requirements and exposure to foreign currency exchange rate fluctuations. Derivative instruments are required to be recognized at fair value in the balance sheet. U. S. Steel has not elected to designate these euro forward sales contracts as hedges. Therefore, changes in their fair value are recognized immediately in the results of operations. The gains and losses recognized on these euro forward sales contracts may also partially offset the accounting remeasurement gains and losses recognized on intercompany loans.

As of March 31, 2013, U. S. Steel held euro forward sales contracts with a total notional value of approximately $353 million. We mitigate the risk of concentration of counterparty credit risk by purchasing our forward sales contracts from several counterparties.

Additionally, we routinely enter into fixed-price forward physical purchase contracts to partially manage our exposure to price risk related to the purchases of natural gas and certain nonferrous metals used in the production process. During 2013 and 2012, the forward physical purchase contracts for natural gas and nonferrous metals qualified for the normal purchases and normal sales exemption described in ASC Topic 815 and were not subject to mark-to-market accounting.

The following summarizes the location and amounts of the fair values and gains or losses related to derivatives included in U. S. Steel’s financial statements as of March 31, 2013 and December 31, 2012 and for the three months ended March 31, 2013 and 2012:

(In millions)	Balance Sheet Location	Fair Value March 31, 2013		Fair Value December 31, 2012
Foreign exchange forward contracts	Accounts receivable	$	4	$	-
Foreign exchange forward contracts	Accounts payable	$	3	$	12

	Statement of Operations Location	Amount of Gain (Loss)		Amount of Gain (Loss)
(In millions)		Three Months ended March 31, 2013		Three Months ended March 31, 2012
Foreign exchange forward contracts	Other financial costs		$11		($13	)

In accordance with the guidance found in ASC Topic 820 on fair value measurements and disclosures, the fair value of our euro forward sales contracts was determined using Level 2 inputs, which are defined as “significant other observable” inputs. The inputs used are from market sources that aggregate data based upon market transactions.

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Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 733		$ 570
Receivables, less allowance of $54 and $55	2,119		1,872
Receivables from related parties (Note 19)	155		218
Inventories (Note 11)	2,316		2,503
Deferred income tax benefits (Note 8)	169		171
Other current assets	62		40
Total current assets	5,554		5,374
Property, plant and equipment	16,845		16,906
Less accumulated depreciation and depletion	10,599		10,498
Total property, plant and equipment, net	6,246		6,408
Investments and long-term receivables, less allowance of $3 in both periods	624		609
Intangibles - net (Note 5)	249		253
Goodwill (Note 5)	1,808		1,822
Deferred income tax benefits (Note 8)	366		424
Other noncurrent assets	304		327
Total assets	15,151		15,217
Current liabilities:
Accounts payable and other accrued liabilities	1,788		1,722
Accounts payable to related parties (Note 19)	91		78
Bank checks outstanding	48		15
Payroll and benefits payable	947		977
Accrued taxes	147		146
Accrued interest	64		50
Short-term debt and current maturities of long-term debt (Note 13)	2		2
Total current liabilities	3,087		2,990
Long-term debt, less unamortized discount (Note 13)	3,932		3,936
Employee benefits	4,263		4,416
Deferred credits and other noncurrent liabilities	398		397
Total liabilities	11,680		11,739
Contingencies and commitments (Note 20)
Stockholders' Equity(Note 17):
Common stock (150,925,911 shares issued) (Note 10)	151		151
Treasury stock, at cost (6,641,532 and 6,643,553 shares)	(520)		(521)
Additional paid-in capital	3,693		3,652
Retained earnings	3,382		3,463
Accumulated other comprehensive loss (Note 18)	(3,236)	[1]	(3,268)	[1]
Total United States Steel Corporation stockholders' equity	3,470		3,477
Noncontrolling interests	1		1
Total liabilities and stockholders' equity	$ 15,151		$ 15,217

[1] All amounts are net of tax. Amounts in parentheses indicate debits.

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Pensions and Other Benefits

3 Months Ended

Mar. 31, 2013

Pensions and Other Benefits

6. Pensions and Other Benefits

The following table reflects the components of net periodic benefit cost for the three months ended March 31, 2013 and 2012:

	Pension Benefits						Other Benefits
(In millions)	2013			2012			2013			2012
Service cost	$	32		$	29		$	7		$	7
Interest cost		101			116			35			45
Expected return on plan assets		(154	)		(153	)		(33	)		(28	)
Amortization of prior service cost		6			5			(3	)		6
Amortization of actuarial net loss		92			88			8			-
Net periodic benefit cost, excluding below		77			85			14			30
Multiemployer plans		18			17			-			-
Settlement, termination and curtailment gains		-			(2	)		-			-
Net periodic benefit cost	$	95		$	100		$	14		$	30

Employer Contributions

During the first three months of 2013, U. S. Steel made $23 million in required cash contributions to the USSC pension plans, cash payments of $18 million to the Steelworkers’ Pension Trust and $3 million of pension payments not funded by trusts.

During the first three months of 2013, cash payments of $67 million were made for other postretirement benefit payments not funded by trusts. In addition, U. S. Steel made a required contribution of $10 million in the first quarter of 2013 to our trust for represented retiree health care and life insurance benefits.

Company contributions to defined contribution plans totaled $11 million and $10 million for the three months ended March 31, 2013 and 2012, respectively.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2013

Goodwill and Intangible Assets

5. Goodwill and Intangible Assets

The changes in the carrying amount of goodwill by segment for the three months ended March 31, 2013 are as follows:

	Flat-rolled Segment			USSE Segment		Tubular Segment		Total
Balance at December 31, 2012	$	984		$	4	$	834	$	1,822
Currency translation		(14	)		-		-		(14	)
Balance at March 31, 2013	$	970		$	4	$	834	$	1,808

Goodwill represents the excess of the cost over the fair value of acquired identifiable tangible and intangible assets and liabilities assumed from businesses acquired. We have two reporting units that include nearly all of our goodwill: our Flat-rolled reporting unit and our Texas Operations reporting unit, which is part of our Tubular operating segment.

Goodwill is tested for impairment at the reporting unit level annually in the third quarter and whenever events or circumstances indicate that the carrying value may not be recoverable. U. S. Steel completed its annual goodwill impairment evaluation during the third quarter of 2012 and determined, on the basis of a number of economic, cost, market and other qualitative factors, that there was no indication of goodwill impairment for any of the reporting units. Goodwill impairment tests in prior years also indicated that goodwill was not impaired for any reporting unit.

Amortizable intangible assets are being amortized on a straight-line basis over their estimated useful lives and are detailed below:

			As of March 31, 2013						As of December 31, 2012
(In millions)	Useful Lives		Gross Carrying Amount		Accumulated Amortization		Net Amount		Gross Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships		22-23 Years	$	219	$	56	$	163	$	221	$	54	$	167
Other		2-20 Years		23		12		11		22		11		11
Total amortizable intangible assets			$	242	$	68	$	174	$	243	$	65	$	178

The carrying amount of acquired water rights with indefinite lives as of March 31, 2013 and December 31, 2012 totaled $75 million. The water rights are tested for impairment annually in the third quarter. U. S. Steel completed its annual evaluation during the third quarter of 2012 by performing a qualitative assessment which indicated that the water rights were not impaired. Prior year impairment tests also indicated that the water rights were not impaired.

Amortization expense was $3 million in both the three months ended March 31, 2013 and 2012. The estimated future amortization expense of identifiable intangible assets during the next five years is $8 million for the remaining portion of 2013 and $11 million each year from 2014 to 2017.

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Statement of Changes in Stockholders' Equity

3 Months Ended

Mar. 31, 2013

Statement of Changes in Stockholders' Equity

17. Statement of Changes in Stockholders’ Equity

The following table reflects the first three months of 2013 and 2012 reconciliation of the carrying amount of total equity, equity attributable to United States Steel Corporation and equity attributable to the noncontrolling interests:

Three Months Ended March 31, 2013	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,478					$	3,463		$	(3,268	)	$	151	$	(521	)	$	3,652	$	1
Comprehensive income:
Net loss		(73	)		(73	)		(73	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		69			69						69
Currency translation adjustment		(37	)		(37	)					(37	)
Issuance of conversion option in Senior Convertible Notes, net of tax		32																	32
Employee stock plans		10														1			9
Dividends paid on common stock		(7	)					(7	)
Other		(1	)					(1	)
Balance at March 31, 2013	$	3,471		$	(41	)	$	3,382		$	(3,236	)	$	151	$	(520	)	$	3,693	$	1

Three Months Ended March 31, 2012	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,501					$	3,616		$	(3,367	)	$	151	$	(550	)	$	3,650	$	1
Comprehensive income:
Net loss		(219	)		(219	)		(219	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		70			70						70
Currency translation adjustment		107			107						107
Employee stock plans		9														1			8
Dividends paid on common stock		(7	)					(7	)
Balance at March 31, 2012	$	3,461		$	(42	)	$	3,390		$	(3,190	)	$	151	$	(549	)	$	3,658	$	1

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Debt

3 Months Ended

Mar. 31, 2013

Debt

13. Debt

(In millions)	Interest Rates %	Maturity	March 31, 2013		December 31, 2012
2037 Senior Notes	6.65	2037	$	350	$	350
2022 Senior Notes	7.50	2022		400		400
2021 Senior Notes	6.875	2021		275		-
2020 Senior Notes	7.375	2020		600		600
2018 Senior Notes	7.00	2018		500		500
2017 Senior Notes	6.05	2017		450		450
2019 Senior Convertible Notes	2.75	2019		316		-
2014 Senior Convertible Notes	4.00	2014		321		863
Province Note (C$150 million)	1.00	2015		148		151
Environmental Revenue Bonds	5.38 - 6.88	2015 - 2042		549		549
Recovery Zone Facility Bonds	6.75	2040		70		70
Fairfield Caster Lease		2022		35		35
Other capital leases and all other obligations		2013 - 2014		1		1
Amended Credit Agreement	Variable	2016		-		-
USSK Revolver	Variable	2013		-		-
USSK credit facilities	Variable	2015		-		-
Total Debt				4,015		3,969
Less Province Note fair value adjustment				21		23
Less unamortized discount				60		8
Less short-term debt and long-term debt due within one year				2		2
Long-term debt			$	3,932	$	3,936

To the extent not otherwise discussed below, information concerning the Senior Notes, the 2014 Senior Convertible Notes and other listed obligations can be found in Note 14 of the audited financial statements in the 2012 Annual Report on Form 10-K.

2021 Senior Notes

On March 26, 2013, U. S. Steel issued $275 million of 6.875% Senior Notes due April 1, 2021 (2021 Senior Notes). U. S. Steel received net proceeds from the offering of $270 million after fees of $5 million related to the underwriting discount and third party expenses. The net proceeds from the issuance of the 2021 Senior Notes, together with the net proceeds of the concurrent 2019 Senior Convertible Notes offering (see below), were used to repurchase a portion of our 4.00% Senior Convertible Notes due May 15, 2014 (the 2014 Senior Convertible Notes). U. S. Steel will pay interest on the notes semi-annually in arrears on April 1^st and October 1^st of each year, commencing on October 1, 2013.

U. S. Steel may redeem the 2021 Senior Notes, in whole or in part, at our option at any time and from time to time on or after April 1, 2017 at the redemption price for such notes set forth below as a percentage of the principal amount, plus accrued and unpaid interest to, but excluding, the redemption date, if redeemed during the twelve-month period beginning April 1 of the years indicated below:

Year	Redemption Price
2017		103.438	%
2018		101.719	%
2019 and thereafter		100.000	%

2019 Senior Convertible Notes

On March 26, 2013, U. S. Steel issued $316 million of 2.75% Senior Convertible Notes due April 1, 2019 (the 2019 Senior Convertible Notes). U. S. Steel received net proceeds from the offering of $308 million after fees of $8 million related to the underwriting discount and third party expenses. The net proceeds from the issuance of the 2019 Senior Convertible Notes, together with the net proceeds of the concurrent 2021 Senior Notes offering (see above), were used to repurchase a portion of our 2014 Senior Convertible Notes. Interest on the 2019 Senior Convertible Notes is payable semi-annually on April 1^st and October 1^st of each year, commencing on October 1, 2013.

The initial conversion rate for the 2019 Senior Convertible Notes is 39.5491 shares of U. S. Steel common stock per $1,000 principal amount, equivalent to an initial conversion price of approximately $25.29 per share of common stock, subject to adjustment as defined in the 2019 Senior Convertible Notes. On the issuance date of the 2019 Senior Convertible Notes, the market price of U. S. Steel’s common stock was below the stated conversion price of $25.29 and therefore, there was no beneficial conversion option to the holders. Based on the initial conversion rate, the 2019 Senior Convertible Notes are convertible into 12,507,403 shares of U. S. Steel common stock and we reserved for the possible issuance of 16,259,615 shares, which is the maximum amount that could be issued upon conversion. Holders may convert their notes at their option prior to the close of business on the business day immediately preceding October 1, 2018 only under certain circumstances (as described in the 2019 Senior Convertible Notes). On or after October 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2019 Senior Convertible Notes at any time. Upon conversion, we will satisfy our conversion obligation by paying or delivering, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock at our election. Any unconverted 2019 Senior Convertible Notes mature at par on April 1, 2019.

U. S. Steel may not redeem the 2019 Senior Convertible Notes prior to April 5, 2017. On or after April 5, 2017, we may redeem for cash all or part of the 2019 Senior Convertible Notes, at our option, under certain circumstances. The redemption price will equal 100% of the principal amount of the 2019 Senior Convertible Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

If U. S. Steel undergoes a fundamental change, as defined in the 2019 Senior Convertible Notes, holders may require us to repurchase the 2019 Senior Convertible Notes in whole or in part for cash at a price equal to 100% of the principal amount of the 2019 Senior Convertible Notes to be purchased plus any accrued and unpaid interest (including additional interest, if any) up to, but excluding the repurchase date.

Although the 2019 Senior Convertible Notes were issued at par, for accounting purposes the proceeds received from the issuance of the notes are allocated between debt and equity to reflect the fair value of the conversion option embedded in the notes and the fair value of similar debt without the conversion option. As a result, $53 million of the gross proceeds of the 2019 Senior Convertible Notes was recorded as an increase in additional paid-in capital with the offsetting amount recorded as a debt discount. The debt discount will be amortized over the term of the 2019 Senior Convertible Notes using an interest rate of 6.2% (the estimated effective borrowing rate for nonconvertible debt at the time of issuance) which will accrete the carrying value of the notes to the principal amount at maturity. As of March 31, 2013, the remaining unamortized debt discount was $53 million and the net carrying amount of the 2019 Senior Convertible Notes was $263 million.

Similar to our other senior notes, the 2019 Senior Convertible Notes and the 2021 Senior Notes contain covenants limiting our ability to create liens, to enter into sale-leaseback transactions and to consolidate, merge or transfer all, or substantially all of our assets. They also contain provisions requiring the purchase of the notes upon a change in control under certain specified circumstances, as well as other customary provisions. In addition, certain payment defaults on other indebtedness are a default under the 2019 Senior Convertible Notes.

2014 Senior Convertible Notes

In March 2013, U. S. Steel repurchased approximately $542 million aggregate principal amount of our 4.00% Senior Convertible Notes due 2014, reducing the outstanding principal amount of the notes to $321 million.

The repurchases were funded with the net proceeds from the 2021 Senior Notes and the 2019 Senior Convertible Notes and cash. The aggregate purchase price, including accrued and unpaid interest and fees, for the convertible notes repurchased was approximately $580 million. U. S. Steel recorded a pretax charge of $34 million to net interest and other financial costs (see Note 7) in the first quarter of 2013 related mainly to the repurchase premiums.

Amended Credit Agreement

As of March 31, 2013, there were no amounts drawn on the Amended Credit Agreement, which expires July 20, 2016, and inventory values calculated in accordance with the Amended Credit Agreement supported the full $875 million of the facility. Under the Amended Credit Agreement, U. S. Steel must maintain a fixed charge coverage ratio (as further defined in the Amended Credit Agreement) of at least 1.00 to 1.00 for the most recent four consecutive quarters when availability under the Amended Credit Agreement is less than the greater of 10% of the total aggregate commitments and $87.5 million. Since availability was greater than $87.5 million, compliance with the fixed charge coverage ratio covenant was not applicable. If the value of inventory does not support the full amount of the facility or we are not able to meet this covenant in the future, the full amount of this facility would not be available to the Company.

Receivables Purchase Agreement

As of March 31, 2013, U. S. Steel has a Receivables Purchase Agreement (RPA) under which eligible trade accounts receivable are sold, on a daily basis without recourse, to U. S. Steel Receivables, LLC (USSR), a wholly owned, bankruptcy-remote, special purpose entity used only for the securitization program. As U. S. Steel accesses this facility, USSR sells senior undivided interests in the receivables to certain third-party commercial paper conduits, while maintaining a subordinated undivided interest in a portion of the receivables. U. S. Steel has agreed to continue servicing the sold receivables at market rates.

At both March 31, 2013 and December 31, 2012, eligible accounts receivable supported $625 million of availability under the RPA and there were no receivables sold to third-party conduits under this facility.

USSR pays the conduits a discount based on the conduits’ borrowing costs plus incremental fees. We paid $1 million in each of the three month periods ended March 31, 2013 and 2012. These costs are included in other financial costs in the statement of operations.

Generally, the facility provides that as payments are collected from the sold accounts receivables, USSR may elect to have the conduits reinvest the proceeds in new eligible accounts receivable. As there was no activity under this facility during the three months ended March 31, 2013, there were no collections reinvested. During the three months ended March 31, 2012, collection of accounts receivable of approximately $1,175 million were reinvested.

The eligible accounts receivable and receivables sold to third-party conduits are summarized below:

(In millions)	March 31, 2013		December 31, 2012
Balance of accounts receivable-net, eligible for sale to third-party conduits	$	1,192	$	1,127
Accounts receivable sold to third-party conduits		-		-
Balance included in Receivables on the balance sheet of U. S. Steel	$	1,192	$	1,127

The net book value of U. S. Steel’s retained interest in the receivables represents the best estimate of the fair market value due to the short-term nature of the receivables. The retained interest in the receivables is recorded net of the allowance for bad debts, which historically have not been significant.

The facility may be terminated on the occurrence and failure to cure certain events, including, among others, failure of USSR to maintain certain ratios related to the collectability of the receivables and failure to make payment under its material debt obligations and may also be terminated upon a change of control. The facility expires on July 18, 2014.

Change in control event

In the event of a change in control of U. S. Steel, debt obligations totaling $3,212 million at March 31, 2013, which includes the Senior Notes and Senior Convertible Notes, may be declared immediately due and payable. In addition, the Amended Credit Agreement and the RPA may be terminated and any amount outstanding thereunder may be declared immediately due and payable. In such event, U. S. Steel may also be required to either repurchase the leased Fairfield slab caster for $20 million or provide a letter of credit to secure the remaining obligation.

U. S. Steel Košice (USSK) credit facilities

At March 31, 2013, USSK had no borrowings under its €200 million (approximately $256 million) unsecured revolving credit facility.

At March 31, 2013, USSK had no borrowings under its €20 million unsecured credit facilities (which approximated $25 million) and the availability was approximately $24 million due to approximately $1 million of customs and other guarantees outstanding.

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Significant Equity Investments

3 Months Ended

Mar. 31, 2013

Significant Equity Investments

9. Significant Equity Investments

Summarized unaudited income statement information for our significant equity investments for the three months ended March 31, 2013 and 2012 is reported below (in millions, amounts represent 100% of investee financial information):

	2013		2012
Net sales	$	291	$	181
Cost of sales		185		170
Operating income		104		10
Net income		104		10
Net income attributable to significant equity investments		104		10

U. S. Steel’s portion of the equity in net income of the significant equity investments above was $5 million for both the three months ended March 31, 2013 and 2012, which is included in the income from investees line on the Consolidated Statement of Operations.

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Derivative Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Derivative [Line Items]
Notional amount of forward contract	$ 353

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Net Interest and Other Financial Costs

3 Months Ended

Mar. 31, 2013

Net Interest and Other Financial Costs

7. Net Interest and Other Financial Costs

Net interest and other financial costs includes interest expense, interest income, financing costs, derivatives gains and losses and foreign currency remeasurement gains and losses. Foreign currency gains and losses are a result of foreign currency denominated assets and liabilities that require remeasurement. During the three months ended March 31, 2013 and 2012, net foreign currency remeasurement losses of $9 million and gains of $2 million, respectively, were recorded in other financial costs. For the three months ended March 31, 2013, net interest and other financial costs also includes a charge of $34 million related to repurchases of approximately $542 million aggregate principal amount of our 4.00% Senior Convertible Notes due May 15, 2014. See Note 13 for further details.

See Note 12 for additional information on U. S. Steel’s use of derivatives to mitigate its foreign currency exchange rate exposure.

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Income Taxes

3 Months Ended

Mar. 31, 2013

Income Taxes

8. Income Taxes

Tax provision

For the three months ended March 31, 2013 and 2012, we recorded a tax provision of $7 million on our pretax loss of $66 million and a tax provision of $96 million on our pretax loss of $123 million, respectively. The tax provision does not reflect any tax benefit for pretax losses in Canada and Serbia (USSS was sold on January 31, 2012), which are jurisdictions where we have, or had, recorded full valuation allowances on deferred tax assets, and also does not reflect any tax provision or benefit for certain foreign currency remeasurement gains and losses that are not recognized in any tax jurisdiction. In addition, no significant tax benefit was recorded on the $399 million loss on the sale of USSS.

The tax provision for the first three months of 2013 is based on an estimated annual effective rate, which requires management to make its best estimate of annual pretax income or loss. During the year, management regularly updates forecasted annual pretax results for the various countries in which we operate based on changes in factors such as prices, shipments, product mix, plant operating performance and cost estimates. To the extent that actual 2013 pretax results for U.S. and foreign income or loss vary from estimates applied herein, the actual tax provision or benefit recognized in 2013 could be materially different from the forecasted amount used to estimate the tax provision for the three months ended March 31, 2013.

Unrecognized tax benefits

Unrecognized tax benefits are the differences between a tax position taken, or expected to be taken, in a tax return and the benefit recognized for accounting purposes pursuant to the guidance found in ASC Topic 740 on income taxes. The total amount of gross unrecognized tax benefits was $84 million at March 31, 2013 and $85 million at December 31, 2012. The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $65 million as of both March 31, 2013 and December 31, 2012.

U. S. Steel records interest related to uncertain tax positions as a part of net interest and other financial costs in the Statement of Operations. Any penalties are recognized as part of selling, general and administrative expenses. As of both March 31, 2013 and December 31, 2012, U. S. Steel had accrued liabilities of $7 million for interest related to uncertain tax positions. U. S. Steel currently does not have a liability for tax penalties.

It is reasonably expected that during the next 12 months unrecognized tax benefits related to income tax issues will decrease by approximately $10 million.

Deferred taxes

As of March 31, 2013, the net domestic deferred tax asset was $477 million compared to $538 million at December 31, 2012. A substantial amount of U. S. Steel’s domestic deferred tax assets relates to employee benefits that will become deductible for tax purposes over an extended period of time as cash contributions are made to employee benefit plans and retiree benefits are paid in the future. We continue to believe it is more likely than not that the net domestic deferred tax asset will be realized.

As of March 31, 2013, the net foreign deferred tax asset was $58 million, net of established valuation allowances of $1,109 million. At December 31, 2012, the net foreign deferred tax asset was $57 million, net of established valuation allowances of $1,099 million. The net foreign deferred tax asset will fluctuate as the value of the U.S. dollar changes with respect to the euro and the Canadian dollar. At December 31, 2012, a full valuation allowance was recorded for the net Canadian deferred tax asset primarily due to cumulative losses in Canada in recent years.

If evidence changes and it becomes more likely than not that the Company will realize the net Canadian deferred tax asset, the valuation allowance would be partially or fully reversed. Any reversal of this amount would result in a decrease to income tax expense. The Slovak income tax rate increased from 19% to 23% starting in 2013. This change had an insignificant impact on deferred taxes at the end of 2012.

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Income and Dividends Per Common Share

3 Months Ended

Mar. 31, 2013

Income and Dividends Per Common Share

10. Income and Dividends Per Common Share

Net Income (Loss) Per Share Attributable to United States Steel Corporation Shareholders

Basic net income (loss) per common share is based on the weighted average number of common shares outstanding during the period.

Diluted net income (loss) per common share assumes the exercise of stock options, the vesting of restricted stock units and performance awards and the conversion of convertible notes, provided in each case the effect is dilutive. The “if-converted” method is used to calculate the dilutive effect of the Senior Convertible Notes due in 2014 and the “treasury stock” method is used to calculate the dilutive effect of the Senior Convertible Notes due in 2019 (due to our current intent and policy, among other factors, to settle the principal amount of the 2019 Senior Convertible Notes in cash upon conversion).

The computations for basic and diluted income (loss) per common share from continuing operations are as follows:

	Three Months Ended March 31,
(Dollars in millions, except per share amounts)	2013			2012
Net loss attributable to United States Steel
Corporation shareholders	$	(73	)	$	(219	)
Plus income effect of assumed conversion-interest on convertible notes		-			-
Net loss after assumed conversion	$	(73	)	$	(219	)
Weighted-average shares outstanding (in thousands):
Basic		144,353			144,075
Effect of convertible notes		-			-
Effect of stock options, restricted stock units and performance awards		-			-
Adjusted weighted-average shares outstanding, diluted		144,353			144,075
Basic loss per common share	$	(0.51	)	$	(1.52	)
Diluted loss per common share	$	(0.51	)	$	(1.52	)

U. S. Steel had a consolidated net loss for the first quarter of 2013 and 2012. As a result of the net loss, outstanding stock options, unvested restricted stock units, unvested performance awards and convertible notes were antidilutive for both quarters and were not included in the computation of diluted weighted average shares. The following table summarizes the securities that were antidilutive:

	Three Months Ended March 31,
(in thousands)	2013			2012
Securities granted under the 2005 Stock Incentive Plan		5,537			3,864
Securities convertible under the Senior Convertible Notes		26,114	(a)		27,059
Total		31,651			30,923

^(a) On March 27, 2013, we repurchased approximately $542 million aggregate principal amount of our 4% Senior Convertible Notes due in 2014. If the repurchases had occurred on January 1, 2013, the antidilutive securities would be 10,058 for the three months ended March 31, 2013.

Dividends Paid Per Share

The dividend for the first quarter of 2013 and 2012 was five cents per common share.

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Debt - Additional Information (Detail) In Millions, except Share data, unless otherwise specified	3 Months Ended				3 Months Ended		3 Months Ended								1 Months Ended	3 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Mar. 30, 2013	Dec. 31, 2012 USD ($)	Mar. 31, 2013 Senior Convertible Notes USD ($)	Mar. 31, 2013 Option Three	Mar. 31, 2013 Amended Credit Agreement USD ($)	Mar. 31, 2013 Amended Credit Agreement Covenant Requirement USD ($)	Mar. 31, 2013 Sale of receivables USD ($)	Dec. 31, 2012 Sale of receivables USD ($)	Mar. 31, 2013 Change in control event USD ($)	Mar. 31, 2013 Fairfield Slab Caster USD ($)	Mar. 31, 2013 USSK Revolver USD ($)	Mar. 31, 2013 USSK Revolver EUR (€)	Mar. 26, 2013 2021 Senior Notes USD ($)	Mar. 31, 2013 2021 Senior Notes USD ($)	Mar. 31, 2013 2014 Senior Convertible Notes USD ($)	Dec. 31, 2012 2014 Senior Convertible Notes USD ($)	Mar. 26, 2013 Senior Convertible Notes Due Twenty Nineteen USD ($)	Mar. 31, 2013 Senior Convertible Notes Due Twenty Nineteen USD ($)	Mar. 31, 2013 USSK Credit Facilities USD ($)	Mar. 31, 2013 USSK Credit Facilities EUR (€)
Debt Instrument [Line Items]
Debt instrument, face amount															$ 275				$ 316
Interest rate %															6.875%	6.875%	4.00%		2.75%	2.75%
Debt instrument, due date							Jul. 20, 2016								Apr. 01, 2021		May 15, 2014		Apr. 01, 2019
Senior Convertible Notes, gross proceeds															270				308	53
Senior Notes, underwriting discount and third party expenses															5				8
Debt instrument, payment frequency																Semi-annually			Semi-annually
Debt instrument, interest payment commencing date																Oct. 01, 2013
Senior Convertible Notes, conversion rate (shares per $1,000 of principal)																			39.5491
Senior Convertible Notes, conversion price per share (shares per $1,000 of principal)																			$ 25.29
Senior Convertible Notes, convertible into number of common stock shares (Based on the initial conversion rate)																			12,507,403
Senior Convertible Notes, maximum amount that could be issued upon conversion																			16,259,615
Description of conversion rate																			The initial conversion rate for the 2019 Senior Convertible Notes is 39.5491 shares of U. S. Steel common stock per $1,000 principal amount, equivalent to an initial conversion price of approximately $25.29 per share of common stock, subject to adjustment as defined in the 2019 Senior Convertible Notes. On the issuance date of the 2019 Senior Convertible Notes, the market price of U. S. Steel’s common stock was below the stated conversion price of $25.29 and therefore, there was no beneficial conversion option to the holders. Based on the initial conversion rate, the 2019 Senior Convertible Notes are convertible into 12,507,403 shares of U. S. Steel common stock and we reserved for the possible issuance of 16,259,614 shares, which is the maximum amount that could be issued upon conversion. Holders may convert their notes at their option prior to the close of business on September 30, 2018 in multiples of $1,000 principal amount, only under certain circumstances (as described in the 2019 Senior Convertible Notes). On or after October 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their 2019 Senior Convertible Notes at any time. Upon conversion, we will satisfy our conversion obligation by paying or delivering, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock at our election. Any unconverted 2019 Senior Convertible Notes mature at par on April 1, 2019.
Repurchase of Senior Convertible Notes in whole or in part for cash in fundamental change, percentage of principal						100.00%
Senior Convertible Notes, unamortized discounts	60			8																53
Senior Convertible Note, net carrying amount																				263
Senior convertible note, interest rate																				6.20%
Repurchased face amount of senior notes																	542
Aggregate principal amount, outstanding	4,015			3,969												275	321	863		316
Aggregate purchase price, including accrued and unpaid interest and fees					580
Premium on repurchase of senior notes					34
Debt instrument, maximum borrowing capacity							875						256	200							25	20
Amended credit agreement, fixed charge coverage ratio							Under the Amended Credit Agreement, U. S. Steel must maintain a fixed charge coverage ratio (as further defined in the Amended Credit Agreement) of at least 1.00 to 1.00 for the most recent four consecutive quarters when availability under the Amended Credit Agreement is less than the greater of 10% of the total aggregate commitments and $87.5 million.
Minimum fixed charge coverage ratio								1.00
Percentage of total aggregate commitments, upper range under financial covenant								10.00%
Credit Agreement, upper range of outstanding debt								87.5
Receivables Purchase Agreement, maximum amount of receivable eligible for sale									625	625
Costs incurred relating to fees on Receivables Purchase Agreement	1	1
Amount reinvested from collection of eligible accounts receivable	0	1,175
Receivable purchase agreement, expiration date			Jul. 18, 2014
Loss exposure											3,212	20
Obligations in the event of a change in control	In the event of a change in control of U. S. Steel, debt obligations totaling $0,000 million at March 31, 2013, which includes the Senior Notes and Senior Convertible Notes, may be declared immediately due and payable. In addition, the Amended Credit Agreement and the RPA may be terminated and any amount outstanding thereunder may be declared immediately due and payable. In such event, U. S. Steel may also be required to either repurchase the leased Fairfield slab caster for $00 million or provide a letter of credit to secure the remaining obligation.
Available borrowing capacity																					24
Customs and other guarantees outstanding																					$ 1

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Eligible Accounts Receivable and Receivables Sold to Third Party Conduits (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance of accounts receivable-net, eligible for sale to third-party conduits	$ 1,192	$ 1,127
Accounts receivable sold to third-party conduits
Accounts receivable-net, included in the accounts receivable balance on the balance sheet of U. S. Steel	$ 1,192	$ 1,127

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Debt (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended				3 Months Ended				3 Months Ended					3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 2037 Senior Notes	Dec. 31, 2012 2037 Senior Notes	Mar. 31, 2013 2022 Senior Notes	Dec. 31, 2012 2022 Senior Notes	Mar. 31, 2013 2021 Senior Notes	Mar. 26, 2013 2021 Senior Notes	Mar. 31, 2013 2020 Senior Notes	Dec. 31, 2012 2020 Senior Notes	Mar. 31, 2013 2018 Senior Notes	Dec. 31, 2012 2018 Senior Notes	Mar. 31, 2013 2017 Senior Notes	Dec. 31, 2012 2017 Senior Notes	Mar. 31, 2013 Senior Convertible Notes Due Twenty Nineteen	Mar. 26, 2013 Senior Convertible Notes Due Twenty Nineteen	Mar. 31, 2013 2014 Senior Convertible Notes	Dec. 31, 2012 2014 Senior Convertible Notes	Mar. 31, 2013 Province Note	Dec. 31, 2012 Province Note	Mar. 31, 2013 Environmental Revenue Bonds	Dec. 31, 2012 Environmental Revenue Bonds	Mar. 31, 2013 Environmental Revenue Bonds Minimum	Mar. 31, 2013 Environmental Revenue Bonds Maximum	Mar. 31, 2013 Recovery Zone Facility Bonds	Dec. 31, 2012 Recovery Zone Facility Bonds	Mar. 31, 2013 Fairfield Caster Lease	Dec. 31, 2012 Fairfield Caster Lease	Mar. 31, 2013 Other capital leases and all other obligations	Dec. 31, 2012 Other capital leases and all other obligations	Mar. 31, 2013 Other capital leases and all other obligations Minimum	Mar. 31, 2013 Other capital leases and all other obligations Maximum	Mar. 31, 2013 Amended Credit Agreement	Mar. 31, 2013 USSK Revolver	Dec. 31, 2012 USSK Revolver	Mar. 31, 2013 USSK Credit Facilities
Debt Instrument [Line Items]
Interest rate			6.65%		7.50%		6.875%	6.875%	7.375%		7.00%		6.05%		2.75%	2.75%	4.00%		1.00%						6.75%
Interest rate %, minimum																					5.38%
Interest rate %, maximum																					6.88%
Interest rate																																	Variable	Variable		Variable
Debt instrument, maturity date			2037		2022		2021		2020		2018		2017		2019		2014		2015				2015	2042	2040		2022				2013	2014	2016	2013		2015
Line of credit facility, amount outstanding
Total Debt	4,015	3,969	350	350	400	400	275		600	600	500	500	450	450	316		321	863	148	151	549	549			70	70	35	35	1	1
Less Province Note fair value adjustment	21	23
Less unamortized discount	60	8													53
Less short-term debt and long-term debt due within one year	2	2
Long-term debt	$ 3,932	$ 3,936

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Location and Amounts of Fair Values Related to Derivatives in Financial Statements

(In millions)	Balance Sheet Location	Fair Value March 31, 2013		Fair Value December 31, 2012
Foreign exchange forward contracts	Accounts receivable	$	4	$	-
Foreign exchange forward contracts	Accounts payable	$	3	$	12

Location and Amounts of Gains or Losses Related to Derivatives in Financial Statements

	Statement of Operations Location	Amount of Gain (Loss)		Amount of Gain (Loss)
(In millions)		Three Months ended March 31, 2013		Three Months ended March 31, 2012
Foreign exchange forward contracts	Other financial costs		$11		($13	)

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			1 Months Ended	3 Months Ended					3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Jan. 31, 2012 USSS	Mar. 31, 2013 USSS	Mar. 31, 2013 Domestic Country	Dec. 31, 2012 Domestic Country	Mar. 31, 2013 Foreign Country	Dec. 31, 2012 Foreign Country	Mar. 31, 2013 Slovakia	Mar. 31, 2013 Slovakia Starting in 2013
Income Taxes [Line Items]
Provision for tax	$ 7	$ 96
Income before income taxes	(66)	(123)
Gain (loss) on sale of asset		(310)		(399)	(399)
Unrecognized tax benefits	84		85
Total amount of unrecognized tax benefits that, if recognized, would affect effective tax rate	65		65
Accrued liabilities, interest on unrecognized tax benefits	7		7
Unrecognized tax benefits amount changes	(10)
Net deferred tax asset						477	538	58	57
Deferred tax asset, valuation allowance								$ 1,109	$ 1,099
Statutory tax rate										19.00%	23.00%

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2012 Labor Agreements

3 Months Ended

Mar. 31, 2013

2012 Labor Agreements

15. 2012 Labor Agreements

Effective September 1, 2012, U. S. Steel and its U. S. Steel Tubular Products, Inc. subsidiary reached new labor agreements with the United Steelworkers (USW), which cover approximately 16,600 employees at our flat-rolled, tubular, coke-making and iron ore operations in the United States (the 2012 Labor Agreements). The 2012 Labor Agreements expire on September 1, 2015. The agreements provided for a $2,000 lump sum payment that was paid to each covered active USW member in October 2012, which resulted in U. S. Steel recognizing a pretax charge of $35 million in the third quarter of 2012. The agreements also provide for a lump sum payment of $500, effective April 1, 2014, to each covered USW member active on that date which is being accrued over the requisite service period.

The 2012 Labor Agreements contain no-strike provisions and include wage increases of 2.0 percent on September 1, 2013 and 2.5 percent on January 1, 2015. The 2012 Labor Agreements also provide for pension and other benefit changes for both current employees and retirees.

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Contingencies and Commitments

3 Months Ended

Mar. 31, 2013

Contingencies and Commitments

20. Contingencies and Commitments

U. S. Steel is the subject of, or party to, a number of pending or threatened legal actions, contingencies and commitments involving a variety of matters, including laws and regulations relating to the environment. Certain of these matters are discussed below. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the consolidated financial statements. However, management believes that U. S. Steel will remain a viable and competitive enterprise even though it is possible that these contingencies could be resolved unfavorably.

U. S. Steel accrues for estimated costs related to existing lawsuits, claims and proceedings when it is probable that it will incur these costs in the future.

Asbestos matters – As of March 31, 2013, U. S. Steel was a defendant in approximately 780 active cases involving approximately 3,320 plaintiffs. Many of these cases involve multiple defendants (typically from fifty to more than one hundred). About 2,560, or approximately 77 percent, of these plaintiff claims are currently pending in jurisdictions which permit filings with massive numbers of plaintiffs. Based upon U. S. Steel’s experience in such cases, it believes that the actual number of plaintiffs who ultimately assert claims against U. S. Steel will likely be a small fraction of the total number of plaintiffs. During the three months ended March 31, 2013, U. S. Steel paid approximately $1 million in settlements. These settlements and other dispositions resolved approximately 75 claims. New case filings in the first three months of 2013 added approximately 65 claims. At December 31, 2012, U. S. Steel was a defendant in approximately 790 active cases involving approximately 3,330 plaintiffs. During 2012, U. S. Steel paid approximately $15 million in settlements. These settlements and other dispositions resolved approximately 190 claims. New case filings in the year ended December 31, 2012 added approximately 285 claims. Most claims filed in 2013 and 2012 involved individual or small groups of claimants as many jurisdictions no longer permit the filing of mass complaints.

Historically, these claims against U. S. Steel fall into three major groups: (1) claims made by persons who allegedly were exposed to asbestos at U. S. Steel facilities (referred to as “premises claims”); (2) claims made by industrial workers allegedly exposed to products manufactured by U. S. Steel; and (3) claims made under certain federal and general maritime laws by employees of former operations of U. S. Steel. In general, the only insurance available to U. S. Steel with respect to asbestos claims is excess casualty insurance, which has multi-million dollar retentions. To date, U. S. Steel has received minimal payments under these policies relating to asbestos claims.

These asbestos cases allege a variety of respiratory and other diseases based on alleged exposure to asbestos. U. S. Steel is currently a defendant in cases in which a total of approximately 265 plaintiffs allege that they are suffering from mesothelioma. The potential for damages against defendants may be greater in cases in which the plaintiffs can prove mesothelioma.

In many cases in which claims have been asserted against U. S. Steel, the plaintiffs have been unable to establish any causal relationship to U. S. Steel or its products or premises; however, with the decline in mass plaintiff cases, the incidence of claimants actually alleging a claim against U. S. Steel is increasing. In addition, in many asbestos cases, the claimants have been unable to demonstrate that they have suffered any identifiable injury or compensable loss at all; that any injuries that they have incurred did in fact result from alleged exposure to asbestos; or that such alleged exposure was in any way related to U. S. Steel or its products or premises.

The amount U. S. Steel has accrued for pending asbestos claims is not material to U. S. Steel’s financial position. U. S. Steel does not accrue for unasserted asbestos claims because it is not possible to determine whether any loss is probable with respect to such claims or even to estimate the amount or range of any possible losses. The vast majority of pending claims against U. S. Steel allege so-called “premises” liability-based alleged exposure on U. S. Steel’s current or former premises. These claims are made by an indeterminable number of people such as truck drivers, railroad workers, salespersons, contractors and their employees, government inspectors, customers, visitors and even trespassers. In most cases the claimant also was exposed to asbestos in non-U. S. Steel settings; the relative periods of exposure between U. S. Steel and non-U. S. Steel settings vary with each claimant; and the strength or weakness of the causal link between U. S. Steel exposure and any injury vary widely as do the nature and severity of the injury claimed.

We are unable to estimate the ultimate outcome of asbestos-related lawsuits, claims and proceedings due to the unpredictable nature of personal injury litigation. Despite this uncertainty, management believes that the ultimate resolution of these matters will not have a material adverse effect on U. S. Steel’s financial condition, although the resolution of such matters could significantly impact results of operations for a particular quarter. Among the factors considered in reaching this conclusion are: (1) it has been many years since U. S. Steel employed maritime workers or manufactured or sold asbestos containing products; (2) most asbestos containing material was removed or remediated at U. S. Steel facilities many years ago; and (3) U. S. Steel’s history of trial outcomes, settlements and dismissals.

Environmental matters – U. S. Steel is subject to federal, state, local and foreign laws and regulations relating to the environment. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for noncompliance. Changes in accrued liabilities for remediation activities are summarized in the following table:

(In millions)	Three Months Ended March 31, 2013
Beginning of period	$	203
Accruals for environmental remediation deemed probable and reasonably estimable		4
Payments		(4	)
End of period	$	203

Accrued liabilities for remediation activities are included in the following balance sheet lines:

(In millions)	March 31, 2013		December 31, 2012
Accounts payable	$	18	$	21
Deferred credits and other noncurrent liabilities		185		182
Total	$	203	$	203

Expenses related to remediation are recorded in cost of sales and totaled $4 million and $3 million for the three months ended March 31, 2013 and 2012, respectively. It is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred. Due to uncertainties inherent in remediation projects and the associated liabilities, it is possible that total remediation costs for active matters and projects with ongoing study and scope development may exceed the accrued liabilities by as much as 15 to 30 percent.

Remediation Projects

U. S. Steel is involved in environmental remediation projects at or adjacent to several current and former U. S. Steel facilities and other locations that are in various stages of completion ranging from initial characterization through post-closure monitoring. Based on the anticipated scope and degree of uncertainty of projects, we categorize projects as follows:

(1) Projects with Ongoing Study and Scope Development are those projects which are still in the study and development phase. For these projects the extent of remediation that may be required is not yet known, the remediation methods and plans are not yet developed, and cost estimates cannot be determined. Therefore, material costs, in addition to the accrued liabilities for these projects, are reasonably possible.

(2) Significant Projects with Defined Scope are those projects with significant accrued liabilities, a defined scope and little likelihood of material additional costs.

(3) Other Projects are those projects with relatively small accrued liabilities for which we believe that, while additional costs are possible, they are not likely to be material, and those projects for which we do not yet possess sufficient information to estimate potential costs to U. S. Steel.

Projects with Ongoing Study and Scope Development – There are five environmental remediation projects where reasonably possible additional costs for completion are not currently estimable, but could be material. These projects are four Resource Conservation and Recovery Act (RCRA) programs (at Fairfield Works, Lorain Tubular, USS-POSCO Industries (UPI) and the Fairless Plant) and a voluntary remediation program at the former steel making plant at Joliet, Illinois. As of March 31, 2013, accrued liabilities for these projects totaled $3 million for the costs of ongoing studies, investigations, and design. It is reasonably possible that additional liabilities associated with future requirements regarding studies, investigations, design and remediation for these projects could be as much as $25 million to $45 million. Depending on agency negotiations and other factors, the UPI project may become defined in 2013.

Significant Projects with Defined Scope – As of March 31, 2013, a total of $60 million was accrued for projects at or related to Gary Works where the scope of work is defined.

Additional projects with defined scope greater than or equal to $5 million are the St. Louis Estuary and Upland Project in Duluth, Minnesota and a project at U. S. Steel’s former Geneva Works in Geneva, Utah. As of March 31, 2013, accrued liabilities for these two additional projects totaled $86 million. U. S. Steel does not expect material additional costs related to these projects.

Other Projects – There are six other environmental remediation projects which each had an accrued liability of between $1 million and $5 million. The total accrued liability for these projects at March 31, 2013 was $13 million. These projects have progressed through a significant portion of the design phase and material additional costs are not expected.

The remaining environmental remediation projects each had an accrued liability of less than $1 million. The total accrued liability for these projects at March 31, 2013 was $7 million. We do not foresee material additional liabilities for any of these sites.

Post-Closure Costs – Accrued liabilities for post-closure site monitoring and other costs at various closed landfills totaled $28 million at March 31, 2013 and were based on known scopes of work.

Administrative and Legal Costs – As of March 31, 2013, U. S. Steel had an accrued liability of $6 million for administrative and legal costs related to environmental remediation projects. These accrued liabilities were based on projected administrative and legal costs for the next three years and do not change significantly from year to year.

Capital Expenditures – For a number of years, U. S. Steel has made substantial capital expenditures to bring existing facilities into compliance with various laws relating to the environment. In the first three months of 2013 and 2012, such capital expenditures totaled $10 million and $16 million, respectively. U. S. Steel anticipates making additional such expenditures in the future; however, the exact amounts and timing of such expenditures are uncertain because of the continuing evolution of specific regulatory requirements.

CO₂ Emissions – Current and potential regulation of Greenhouse Gas (GHG) emissions remains a significant issue for the steel industry, particularly for integrated steel producers such as U. S. Steel. The regulation of carbon dioxide (CO₂) emissions has either become law or is being considered by legislative bodies of many nations, including countries where we have operating facilities. The European Union (EU) has established GHG regulations based upon national allocations and a cap and trade system. In Canada, both the federal and Ontario governments have issued proposed requirements for GHG emissions. In the United States, the Environmental Protection Agency (EPA) has published rules for regulating GHG emissions for certain facilities and has implemented various reporting requirements as further described below. In 2010, GHG legislation was passed in the House of Representatives and introduced in the Senate. The federal courts are considering several suits that challenge the EPA’s authority to regulate GHG emissions under the Clean Air Act. We do not know what action, if any, may be taken by the current or future sessions of Congress.

The EU has issued regulations under their cap and trade system for the period 2013-2020 (NAP III) that are more stringent than those in NAP II. USSK has not yet been advised of its free allocation for NAP III.

On May 13, 2010, the EPA published its final Greenhouse Gas Tailoring Rule establishing a mechanism for regulating GHG emissions from facilities through the Clean Air Act’s Prevention of Significant Deterioration (PSD) permitting process. U. S. Steel reported its emissions under these rules in accordance with the regulation and its deadlines. Since 2011, new projects that increase GHG emissions by more than 75,000 tons per year have new PSD requirements based on best available control technology (BACT), but only if the project also significantly increases emissions of at least one non-GHG pollutant. Only existing sources with Title V permits or new sources obtaining Title V permits for non-GHG pollutants will also be required to address GHG emissions. As of July 1, 2011, new sources not already subject to Title V requirements that emit over 100,000 tons per year, or modifications to existing permits that increase GHG emissions by more than 75,000 tons per year, are subject to PSD and Title V requirements. On November 17, 2010 the EPA issued its “PSD and Title V Permitting Guidance for Greenhouse Gases” and “Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry.” With this guidance, EPA intends to help state and local air permitting authorities identify greenhouse gas reductions under the Clean Air Act. Additionally, the EPA revised the National Ambient Air Quality Standards (NAAQS) for nitrogen oxide, sulfur dioxide and lead in 2010 and is in the process of revising the NAAQS for 2.5 micron particulate matter, ozone and sulfur dioxides.

It is impossible to estimate the timing or impact of these or other future government action on U. S. Steel, although it could be significant. Such impacts may include substantial capital expenditures, costs for emission allowances, restriction of production, and higher prices for coking coal, natural gas and electricity generated by carbon based systems.

European Union (EU) Environmental Requirements – Slovakia is currently considering a law implementing an EU Waste Framework Directive that would more strictly regulate waste disposal and increase fees for waste disposed of in landfills including privately owned landfills. The intent of the waste directive is to encourage recycling and because Slovakia has not adopted implementing legislation, we cannot estimate the full financial impact of this prospective legislation at this time.

The EU’s Industry Emission Directive will require implementation of EU determined best available techniques (BATs) to reduce environmental impacts as well as compliance with BAT associated emission levels. It contains operational requirements for air emissions, waste water discharges, solid waste disposal and energy conservation, dictates certain operating practices and imposes stricter emission limits. Producers will be required to be in compliance with the iron and steel BAT by March 8, 2016. We are evaluating the costs of complying with BAT, but our most recent broad estimate of likely capital expenditures is $300 million to $400 million over the 2013 to 2016 period. We are currently investigating the possibility of obtaining EU grants to fund a portion of those capital expenditures. We also believe that there will be increased operating costs, such as increased energy and maintenance costs, but we are currently unable to reliably estimate this amount.

Environmental and other indemnifications – Throughout its history, U. S. Steel has sold numerous properties and businesses and many of these sales included indemnifications and cost sharing agreements related to the assets that were sold. These indemnifications and cost sharing agreements have related to the condition of the property, the approved use, certain representations and warranties, matters of title and environmental matters. While most of these provisions have not specifically dealt with environmental issues, there have been transactions in which U. S. Steel indemnified the buyer for non-compliance with past, current and future environmental laws related to existing conditions and there can be questions as to the applicability of more general indemnification provisions to environmental matters. Most recent indemnifications and cost sharing agreements are of a limited nature only applying to non-compliance with past and/or current laws. Some indemnifications and cost sharing agreements only run for a specified period of time after the transactions close and others run indefinitely. In addition, current owners of property formerly owned by U. S. Steel may have common law claims and contribution rights against U. S. Steel for environmental matters. The amount of potential environmental liability associated with these transactions and properties is not estimable due to the nature and extent of the unknown conditions related to the properties sold. Aside from the environmental liabilities already recorded as a result of these transactions due to specific environmental remediation activities and cases (included in the $203 million of accrued liabilities for remediation discussed above), there are no other known environmental liabilities related to these transactions.

Guarantees – The maximum guarantees of the indebtedness of unconsolidated entities of U. S. Steel totaled $29 million at March 31, 2013. In the event that any default related to the guaranteed indebtedness occurs, U. S. Steel has access to its interest in the assets of the investees to reduce its potential losses under the guarantees.

Antitrust Class Actions – In a series of lawsuits filed in federal court in the Northern District of Illinois beginning September 12, 2008, individual direct or indirect buyers of steel products have asserted that eight steel manufacturers, including U. S. Steel, conspired in violation of antitrust laws to restrict the domestic production of raw steel and thereby to fix, raise, maintain or stabilize the price of steel products in the United States. The cases are filed as class actions and claim treble damages for the period 2005 to present, but do not allege any damage amounts. U. S. Steel is vigorously defending these lawsuits and does not believe that it is probable a liability regarding these matters has been incurred. We are unable to estimate a range of possible loss at this time.

EPA Region V Federal Lawsuit – On August 1, 2012, the U.S. government, joined by the States of Illinois, Indiana and Michigan, filed a complaint in the Northern District of Indiana alleging various CAA and State air regulatory violations that were to have allegedly occurred at Gary Works, Granite City Works, and Great Lakes Works, our three integrated iron and steel facilities located in EPA Region V. The Complaint alleges that Gary Works failed to obtain the proper pre-construction permit for a routine reline of its Blast Furnace No. 4 in 1990, and that the three facilities failed to meet certain operational, maintenance, opacity, and recordkeeping requirements under the CAA and its implementing regulations. The Complaint requests relief in the form of statutory penalties for each violation and for injunctive relief. U. S. Steel believes that the claims asserted in the Complaint are not justified and are without statutory foundation. On September 21, 2012, U. S. Steel filed a motion to dismiss the U.S. government’s claims for relief regarding the 1990 reline of the Gary Blast Furnace No. 4 and filed an answer to the remaining allegations in the Complaint. On January 24, 2013, the Court heard oral arguments regarding the motion to dismiss. The motion is still pending before the Court. U. S. Steel will continue to vigorously defend against these claims. At this time, the potential outcome is not reasonably estimable.

Randle Reef – The Canadian and Ontario governments have identified for remediation a sediment deposit, commonly referred to as Randle Reef, in Hamilton Harbor near USSC’s Hamilton Works, for which the regulatory agencies estimate expenditures with a net present value of approximately C$120 million (approximately $118 million). The national and provincial governments have each allocated C$40 million (approximately $39 million) for this project. Local sources, including industry, have also agreed to provide funding of C$40 million (approximately $39 million) for this project. USSC has committed to contribute approximately 11,000 tons of hot rolled steel and to fund C$2 million (approximately $2 million). The steel contribution is expected to be made in 2014. As of March 31, 2013, U. S. Steel has an accrued liability of approximately $10 million reflecting the contribution commitment.

Other contingencies – Under certain operating lease agreements covering various equipment, U. S. Steel has the option to renew the lease or to purchase the equipment at the end of the lease term. If U. S. Steel does not exercise the purchase option by the end of the lease term, U. S. Steel guarantees a residual value of the equipment as determined at the lease inception date (totaling approximately $12 million at March 31, 2013). No liability has been recorded for these guarantees as the potential loss is not probable.

Insurance – U. S. Steel maintains insurance for certain property damage, equipment, business interruption and general liability exposures; however, insurance is applicable only after certain deductibles and retainages. U. S. Steel is self-insured for certain other exposures including workers’ compensation (where permitted by law) and auto liability. Liabilities are recorded for workers’ compensation and personal injury obligations. Other costs resulting from losses under deductible or retainage amounts or not otherwise covered by insurance are charged against income upon occurrence.

U. S. Steel uses surety bonds, trusts and letters of credit to provide whole or partial financial assurance for certain obligations such as workers’ compensation. The total amount of active surety bonds, trusts and letters of credit being used for financial assurance purposes was approximately $165 million as of March 31, 2013, which reflects U. S. Steel’s maximum exposure under these financial guarantees, but not its total exposure for the underlying obligations. Most of the trust arrangements and letters of credit are collateralized by restricted cash. Restricted cash, which is recorded in other current and noncurrent assets, totaled $153 million at March 31, 2013, of which $4 million was classified as current, and $181 million at December 31, 2012, of which $5 million was classified as current. Restricted cash at March 31, 2013 also includes $62 million to fund certain capital projects at Gary Works, our Clairton Plant and Granite City Works. The proceeds become unrestricted as capital expenditures for these projects are made.

Capital Commitments – At March 31, 2013, U. S. Steel’s contractual commitments to acquire property, plant and equipment totaled $254 million.

Contractual Purchase Commitments – U. S. Steel is obligated to make payments under contractual purchase commitments, including unconditional purchase obligations. Payments for contracts with remaining terms in excess of one year are summarized below (in millions):

Remainder of 2013	2014	2015	2016	2017	Later Years	Total
$672	$704	$337	$322	$310	$1,722	$	4,067

The majority of U. S. Steel’s unconditional purchase obligations relates to the supply of industrial gases, energy and utility services with terms ranging from two to 15 years. Unconditional purchase obligations also include coke and steam purchase commitments related to a coke supply agreement with Gateway Energy & Coke Company LLC under which Gateway is obligated to supply 90 percent to 105 percent of the expected annual capacity of the heat recovery coke plant, and U. S. Steel is obligated to purchase the coke from Gateway at the contract price. As of March 31, 2013, a maximum default payment of approximately $255 million would apply if U. S. Steel terminates the agreement.

Total payments relating to unconditional purchase obligations were approximately $183 million and $185 million for the three months ended March 31, 2013 and 2012, respectively.

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Pensions and Other Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to defined contribution plans	$ 11	$ 10
USSC Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans	23
Steelworkers Pension Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans	18
Other Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans	3
Unfunded Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans	67
Defined Benefit Postretirement Health Coverage
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans	$ 10

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Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2013 Segment
Segment Reporting Information [Line Items]
Number of reportable segments	3

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Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Receivables, allowance	$ 54	$ 55
Investments and long-term receivables, allowance	$ 3	$ 3
Common stock, shares issued	150,925,911	150,925,911
Treasury stock, shares	6,641,532	6,643,553

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Dispositions

3 Months Ended

Mar. 31, 2013

Dispositions

4. Dispositions

The net loss on disposal of assets for the first three months of 2012 primarily relates to the following dispositions:

U. S. Steel Serbia

On January 31, 2012, U. S. Steel sold USSS to the Republic of Serbia for a purchase price of one dollar. In addition, USSK received a $40 million payment for certain intercompany balances owed by USSS for raw materials and support services. As a result of this transaction, U. S. Steel recorded a total non-cash pretax charge of $399 million.

Birmingham Southern Railroad Company

On February 1, 2012, U. S. Steel completed the sale of the majority of the operating assets of Birmingham Southern Railroad Company and the Port Birmingham Terminal. As a result of the transaction, U. S. Steel recorded a pretax gain of $89 million.

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Inventories - Additional Information (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Line Items]
Percent of Last-in, First-out (LIFO) inventory to total inventory values	61.00%	56.00%
Estimate in excess of current acquisition costs over stated inventory values	$ 1,000,000,000	$ 1,000,000,000
Land held for residential or commercial development	$ 97,000,000	$ 86,000,000

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2012 Labor Agreements - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended
	Sep. 01, 2012 Employee	Sep. 30, 2012	Sep. 01, 2012 October 15, 2012	Sep. 01, 2012 April 1, 2014	Mar. 31, 2013 September 2013	Mar. 31, 2013 January 2015
Employee Benefit Plan [Line Items]
Number of employees covered by 2012 labor agreement	16,600
Labor agreement, expiration date	Sep. 01, 2015
Labor agreement, lump sum payment to be paid to each active member			$ 2,000	$ 500
Labor agreement, total cost for lump sum payments		$ 35,000,000
Wage increase percentage					2.00%	2.50%

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2013

Reclassifications

Reclassifications

Certain reclassifications of prior years’ data have been made to conform to the current year presentation.

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Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Net sales to related parties	$ 278	$ 339
Accounts payable to related parties	91		78
Outside processing services
Related Party Transaction [Line Items]
Purchases from related parties	19	13
Taconite pellets
Related Party Transaction [Line Items]
Purchases from related parties	64	59
PRO-TEC Coating Company
Related Party Transaction [Line Items]
Accounts payable to related parties	88		75
Other equity investees
Related Party Transaction [Line Items]
Accounts payable to related parties	$ 3		$ 3

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Statement of Changes in Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Consolidated Statement of Changes in Equity

The following table reflects the first three months of 2013 and 2012 reconciliation of the carrying amount of total equity, equity attributable to United States Steel Corporation and equity attributable to the noncontrolling interests:

Three Months Ended March 31, 2013	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,478					$	3,463		$	(3,268	)	$	151	$	(521	)	$	3,652	$	1
Comprehensive income:
Net loss		(73	)		(73	)		(73	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		69			69						69
Currency translation adjustment		(37	)		(37	)					(37	)
Issuance of conversion option in Senior Convertible Notes, net of tax		32																	32
Employee stock plans		10														1			9
Dividends paid on common stock		(7	)					(7	)
Other		(1	)					(1	)
Balance at March 31, 2013	$	3,471		$	(41	)	$	3,382		$	(3,236	)	$	151	$	(520	)	$	3,693	$	1

Three Months Ended March 31, 2012	Total			Comprehensive Income (Loss)			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Common Stock		Treasury Stock			Paid-in Capital		Non- Controlling Interest
Balance at beginning of year	$	3,501					$	3,616		$	(3,367	)	$	151	$	(550	)	$	3,650	$	1
Comprehensive income:
Net loss		(219	)		(219	)		(219	)
Other comprehensive income (loss), net of tax:
Pension and other benefit adjustments		70			70						70
Currency translation adjustment		107			107						107
Employee stock plans		9														1			8
Dividends paid on common stock		(7	)					(7	)
Balance at March 31, 2012	$	3,461		$	(42	)	$	3,390		$	(3,190	)	$	151	$	(549	)	$	3,658	$	1

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Asset Retirement Obligations

3 Months Ended

Mar. 31, 2013

Asset Retirement Obligations

14. Asset Retirement Obligations

U. S. Steel’s asset retirement obligations (AROs) primarily relate to mine and landfill closure and post-closure costs. The following table reflects changes in the carrying values of AROs:

(In millions)	March 31, 2013			December 31, 2012
Balance at beginning of year	$	33		$	38
Additional obligations incurred		-			2
Obligations settled		(2	)		(9	)  (a)
Accretion expense		1			2
Balance at end of period	$	32		$	33

^(a) Includes $2 million as a result of the sale of USSS on January 31, 2012. See Note 4 for additional details.

Certain AROs related to disposal costs of the majority of fixed assets at our integrated steel facilities have not been recorded because they have an indeterminate settlement date. These AROs will be initially recognized in the period in which sufficient information exists to estimate their fair value.